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1 Commits
master ... alert-conf

Author SHA1 Message Date
Ian Fijolek
89f2849912 Add Monitor.Alerts
All checks were successful
continuous-integration/drone/push Build is passing
Details 
Add the ability to pass a single list of alerts to a monitor that will
be executed on either an up or down alert.

Right now this can be used with a Go template that changes the alert
content depending on the type of alert. Later, I may add a way to pass
two commands to an Alert where one can be for down and the other for
up.
 2020-06-19 22:37:14 -07:00
27 changed files with 397 additions and 1323 deletions
Show Stats Expand all files Collapse all files

120
.drone.yml
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@ -3,15 +3,31 @@ kind: pipeline
name: test name: test
steps: steps:
- name: test - name: test
image: golang:1.20 image: golang:1.12
environment:
VERSION: ${DRONE_TAG:-${DRONE_COMMIT}}
commands: commands:
- make build
- make test - make test
- name: check - name: check
image: iamthefij/drone-pre-commit:personal image: python:3
commands:
- pip install pre-commit==1.20.0
- make check
- name: notify
image: drillster/drone-email
settings:
host:
from_secret: SMTP_HOST
username:
from_secret: SMTP_USER
password:
from_secret: SMTP_PASS
from: drone@iamthefij.com
when:
status: [changed, failure]
--- ---
kind: pipeline kind: pipeline
@ -30,71 +46,69 @@ trigger:
steps: steps:
- name: build all binaries - name: build all binaries
image: golang:1.20 image: golang:1.12
environment:
VERSION: ${DRONE_TAG:-${DRONE_COMMIT}}
commands: commands:
- make all - make all
- name: compress binaries for release - name: push image - arm
image: ubuntu image: plugins/docker
commands:
- find ./dist -type f -executable -execdir tar -czvf {}.tar.gz {} \;
when:
event: tag
- name: upload gitea release
image: plugins/gitea-release
settings:
title: ${DRONE_TAG}
files: dist/*.tar.gz
checksum:
- md5
- sha1
- sha256
- sha512
base_url:
from_secret: gitea_base_url
api_key:
from_secret: gitea_token
when:
event: tag
- name: Build and publish docker images
image: thegeeklab/drone-docker-buildx
settings: settings:
repo: iamthefij/minitor-go repo: iamthefij/minitor-go
auto_tag: true auto_tag: true
platforms: auto_tag_suffix: linux-arm
- linux/amd64 username:
- linux/arm64 from_secret: docker_username
- linux/arm password:
from_secret: docker_password
build_args:
- ARCH=arm
- REPO=arm32v7
- name: push image - arm64
image: plugins/docker
settings:
repo: iamthefij/minitor-go
auto_tag: true
auto_tag_suffix: linux-arm64
username:
from_secret: docker_username
password:
from_secret: docker_password
build_args:
- ARCH=arm64
- REPO=arm64v8
- name: push image - amd64
image: plugins/docker
settings:
repo: iamthefij/minitor-go
auto_tag: true
auto_tag_suffix: linux-amd64
username: username:
from_secret: docker_username from_secret: docker_username
password: password:
from_secret: docker_password from_secret: docker_password
--- - name: publish manifest
kind: pipeline image: plugins/manifest
name: notify settings:
spec: manifest.tmpl
depends_on: auto_tag: true
- test ignore_missing: true
- publish username:
from_secret: docker_username
trigger: password:
status: from_secret: docker_password
- failure
steps:
- name: notify - name: notify
image: drillster/drone-email image: drillster/drone-email
settings: settings:
host: host:
from_secret: SMTP_HOST # pragma: whitelist secret from_secret: SMTP_HOST
username: username:
from_secret: SMTP_USER # pragma: whitelist secret from_secret: SMTP_USER
password: password:
from_secret: SMTP_PASS # pragma: whitelist secret from_secret: SMTP_PASS
from: drone@iamthefij.com from: drone@iamthefij.com
when:
status: [changed, failure]

4
.gitignore vendored
View File

@ -17,5 +17,5 @@ config.yml
# Output binary # Output binary
minitor minitor
minitor-go minitor-linux-*
dist/ minitor-darwin-amd64

36
.golangci.yml
View File

@ -1,36 +0,0 @@
---
linters:
enable:
- errname
- errorlint
- exhaustive
- gofumpt
- goimports
- gomnd
- goprintffuncname
- misspell
- tagliatelle
- tenv
- testpackage
- thelper
- tparallel
- unconvert
- wrapcheck
- wsl
disable:
- gochecknoglobals
linters-settings:
gosec:
excludes:
- G204
tagliatelle:
case:
rules:
yaml: snake
issues:
exclude-rules:
- path: _test\.go
linters:
- gosec

15
.pre-commit-config.yaml
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@ -1,7 +1,7 @@
--- ---
repos: repos:
- repo: https://github.com/pre-commit/pre-commit-hooks - repo: https://github.com/pre-commit/pre-commit-hooks
rev: v4.4.0 rev: v2.4.0
hooks: hooks:
- id: check-added-large-files - id: check-added-large-files
- id: check-yaml - id: check-yaml
@ -10,11 +10,10 @@ repos:
- id: trailing-whitespace - id: trailing-whitespace
- id: end-of-file-fixer - id: end-of-file-fixer
- id: check-merge-conflict - id: check-merge-conflict
- repo: https://github.com/golangci/golangci-lint - repo: git://github.com/dnephin/pre-commit-golang
rev: v1.52.2 rev: v0.3.5
hooks: hooks:
- id: golangci-lint - id: go-fmt
- repo: https://github.com/hadolint/hadolint - id: go-imports
rev: v2.12.1-beta # - id: gometalinter
hooks: # - id: golangci-lint
- id: hadolint

14
Dockerfile
View File

@ -1,10 +1,15 @@
FROM alpine:3.18 ARG REPO=library
FROM multiarch/qemu-user-static:4.2.0-2 as qemu-user-static
FROM ${REPO}/alpine:3.10
# Copying all qemu files because amd64 doesn't exist and cannot condional copy
COPY --from=qemu-user-static /usr/bin/qemu-* /usr/bin/
RUN mkdir /app RUN mkdir /app
WORKDIR /app/ WORKDIR /app/
# Add common checking tools # Add common checking tools
RUN apk --no-cache add bash=~5 curl=~8 jq=~1 bind-tools=~9 tzdata~=2024a RUN apk --no-cache add bash=~5.0 curl=~7.66 jq=~1.6
# Add minitor user for running as non-root # Add minitor user for running as non-root
RUN addgroup -S minitor && adduser -S minitor -G minitor RUN addgroup -S minitor && adduser -S minitor -G minitor
@ -14,9 +19,8 @@ COPY ./scripts /app/scripts
RUN chmod -R 755 /app/scripts RUN chmod -R 755 /app/scripts
# Copy minitor in # Copy minitor in
ARG TARGETOS ARG ARCH=amd64
ARG TARGETARCH COPY ./minitor-linux-${ARCH} ./minitor
COPY ./dist/minitor-${TARGETOS}-${TARGETARCH} ./minitor
# Drop to non-root user # Drop to non-root user
USER minitor USER minitor

14
Dockerfile.multi-stage
View File

@ -1,4 +1,7 @@
FROM golang:1.20 AS builder ARG REPO=library
FROM golang:1.12-alpine AS builder
RUN apk add --no-cache git=~2
RUN mkdir /app RUN mkdir /app
WORKDIR /app WORKDIR /app
@ -8,13 +11,12 @@ RUN go mod download
COPY ./*.go /app/ COPY ./*.go /app/
ARG TARGETOS ARG ARCH=amd64
ARG TARGETARCH
ARG VERSION=dev ARG VERSION=dev
ENV CGO_ENABLED=0 GOOS=$TARGETOS GOARCH=${TARGETARCH} ENV CGO_ENABLED=0 GOOS=linux GOARCH=${ARCH}
RUN go build -ldflags "-X main.version=${VERSION}" -a -installsuffix nocgo -o minitor . RUN go build -ldflags "-X main.version=${VERSION}" -a -installsuffix nocgo -o minitor .
FROM alpine:3.18 FROM ${REPO}/alpine:3.10
RUN mkdir /app RUN mkdir /app
WORKDIR /app/ WORKDIR /app/
@ -22,7 +24,7 @@ WORKDIR /app/
COPY --from=builder /app/minitor . COPY --from=builder /app/minitor .
# Add common checking tools # Add common checking tools
RUN apk --no-cache add bash=~5 curl=~8 jq=~1 bind-tools=~9 tzdata~=2024a RUN apk --no-cache add bash=~5.0 curl=~7.66 jq=~1.6
# Add minitor user for running as non-root # Add minitor user for running as non-root
RUN addgroup -S minitor && adduser -S minitor -G minitor RUN addgroup -S minitor && adduser -S minitor -G minitor

80
Makefile
View File

@ -1,43 +1,36 @@
DOCKER_TAG ?= minitor-go-${USER} DOCKER_TAG ?= minitor-go-${USER}
VERSION ?= $(shell git describe --tags --dirty) GIT_TAG_NAME := $(shell git tag -l --contains HEAD)
GOFILES = *.go go.mod go.sum GIT_SHA := $(shell git rev-parse HEAD)
# Multi-arch targets are generated from this VERSION := $(if $(GIT_TAG_NAME),$(GIT_TAG_NAME),$(GIT_SHA))
TARGET_ALIAS = minitor-linux-amd64 minitor-linux-arm minitor-linux-arm64 minitor-darwin-amd64
TARGETS = $(addprefix dist/,$(TARGET_ALIAS))
#
# Default make target will run tests
.DEFAULT_GOAL = test
# Build all static Minitor binaries
.PHONY: all .PHONY: all
all: $(TARGETS) all: minitor-linux-amd64 minitor-linux-arm minitor-linux-arm64
# Build all static Linux Minitor binaries. Used in Docker images .PHONY: default
.PHONY: all-linux default: test
all-linux: $(filter dist/minitor-linux-%,$(TARGETS))
# Build minitor for the current machine
minitor: $(GOFILES)
@echo Version: $(VERSION)
go build -ldflags '-X "main.version=${VERSION}"' -o minitor
.PHONY: build .PHONY: build
build: minitor build: minitor
# Run minitor for the current machine minitor:
@echo Version: $(VERSION)
go build -ldflags '-X "main.version=${VERSION}"' -o minitor
.PHONY: run .PHONY: run
run: minitor run: minitor build
./minitor -debug ./minitor -debug
.PHONY: run-metrics .PHONY: run-metrics
run-metrics: minitor run-metrics: minitor build
./minitor -debug -metrics ./minitor -debug -metrics
# Run all tests
.PHONY: test .PHONY: test
test: test:
go test -coverprofile=coverage.out go test -coverprofile=coverage.out
@echo
go tool cover -func=coverage.out go tool cover -func=coverage.out
@echo
@# Check min coverage percentage
@go tool cover -func=coverage.out | awk -v target=80.0% \ @go tool cover -func=coverage.out | awk -v target=80.0% \
'/^total:/ { print "Total coverage: " $$3 " Minimum coverage: " target; if ($$3+0.0 >= target+0.0) print "ok"; else { print "fail"; exit 1; } }' '/^total:/ { print "Total coverage: " $$3 " Minimum coverage: " target; if ($$3+0.0 >= target+0.0) print "ok"; else { print "fail"; exit 1; } }'
@ -46,7 +39,7 @@ test:
install-hooks: install-hooks:
pre-commit install --install-hooks pre-commit install --install-hooks
# Runs pre-commit checks on files # Checks files for encryption
.PHONY: check .PHONY: check
check: check:
pre-commit run --all-files pre-commit run --all-files
@ -54,8 +47,9 @@ check:
.PHONY: clean .PHONY: clean
clean: clean:
rm -f ./minitor rm -f ./minitor
rm -f ./minitor-linux-*
rm -f ./minitor-darwin-amd64
rm -f ./coverage.out rm -f ./coverage.out
rm -fr ./dist
.PHONY: docker-build .PHONY: docker-build
docker-build: docker-build:
@ -66,24 +60,36 @@ docker-run: docker-build
docker run --rm -v $(shell pwd)/config.yml:/root/config.yml $(DOCKER_TAG) docker run --rm -v $(shell pwd)/config.yml:/root/config.yml $(DOCKER_TAG)
## Multi-arch targets ## Multi-arch targets
$(TARGETS): $(GOFILES)
mkdir -p ./dist
GOOS=$(word 2, $(subst -, ,$(@))) GOARCH=$(word 3, $(subst -, ,$(@))) CGO_ENABLED=0 \
go build -ldflags '-X "main.version=${VERSION}"' -a -installsuffix nocgo \
-o $@
.PHONY: $(TARGET_ALIAS) # Arch specific go build targets
$(TARGET_ALIAS): minitor-darwin-amd64:
$(MAKE) $(addprefix dist/,$@) GOOS=darwin GOARCH=amd64 CGO_ENABLED=0 \
go build -ldflags '-X "main.version=${VERSION}"' -a -installsuffix nocgo \
-o minitor-darwin-amd64
minitor-linux-amd64:
GOOS=linux GOARCH=amd64 CGO_ENABLED=0 \
go build -ldflags '-X "main.version=${VERSION}"' -a -installsuffix nocgo \
-o minitor-linux-amd64
minitor-linux-arm:
GOOS=linux GOARCH=arm CGO_ENABLED=0 \
go build -ldflags '-X "main.version=${VERSION}"' -a -installsuffix nocgo \
-o minitor-linux-arm
minitor-linux-arm64:
GOOS=linux GOARCH=arm64 CGO_ENABLED=0 \
go build -ldflags '-X "main.version=${VERSION}"' -a -installsuffix nocgo \
-o minitor-linux-arm64
# Arch specific docker build targets # Arch specific docker build targets
.PHONY: docker-build-arm .PHONY: docker-build-arm
docker-build-arm: dist/minitor-linux-arm docker-build-arm: minitor-linux-arm
docker build --platform linux/arm . -t ${DOCKER_TAG}-linux-arm docker build --build-arg REPO=arm32v7 --build-arg ARCH=arm . -t ${DOCKER_TAG}-linux-arm
.PHONY: docker-build-arm64 .PHONY: docker-build-arm
docker-build-arm64: dist/minitor-linux-arm64 docker-build-arm64: minitor-linux-arm64
docker build --platform linux/arm64 . -t ${DOCKER_TAG}-linux-arm64 docker build --build-arg REPO=arm64v8 --build-arg ARCH=arm64 . -t ${DOCKER_TAG}-linux-arm64
# Cross run on host architechture # Cross run on host architechture
.PHONY: docker-run-arm .PHONY: docker-run-arm

60
README.md
View File

@ -46,8 +46,6 @@ docker run -v $PWD/config.yml:/app/config.yml iamthefij/minitor-go:latest
Images are provided for `amd64`, `arm`, and `arm64` architechtures. Images are provided for `amd64`, `arm`, and `arm64` architechtures.
Timezone configuration for the container is set by passing the `TZ` env variable. Eg. `TZ=America/Los_Angeles`.
## Configuring ## Configuring
In this repo, you can explore the `sample-config.yml` file for an example, but the general structure is as follows. It should be noted that environment variable interpolation happens on load of the YAML file. In this repo, you can explore the `sample-config.yml` file for an example, but the general structure is as follows. It should be noted that environment variable interpolation happens on load of the YAML file.
@ -56,10 +54,7 @@ The global configurations are:
|key|value| |key|value|
|---|---| |---|---|
|`check_interval`|Maximum frequency to run checks for each monitor as duration, eg. 1m2s.| |`check_interval`|Maximum frequency to run checks for each monitor|
|`default_alert_after`|A default value used as an `alert_after` value for a monitor if not specified or 0.|
|`default_alert_down`|Default down alerts to used by a monitor in case none are provided.|
|`default_alert_up`|Default up alerts to used by a monitor in case none are provided.|
|`monitors`|List of all monitors. Detailed description below| |`monitors`|List of all monitors. Detailed description below|
|`alerts`|List of all alerts. Detailed description below| |`alerts`|List of all alerts. Detailed description below|
@ -73,6 +68,7 @@ Each monitor allows the following configuration:
|---|---| |---|---|
|`name`|Name of the monitor running. This will show up in messages and logs.| |`name`|Name of the monitor running. This will show up in messages and logs.|
|`command`|Specifies the command that should be executed, either in exec or shell form. This command's exit value will determine whether the check is successful| |`command`|Specifies the command that should be executed, either in exec or shell form. This command's exit value will determine whether the check is successful|
|`alerts`|A list of Alerts to be triggered when the monitor changes states to either "up" or "down". This is most useful if using a conditional template|
|`alert_down`|A list of Alerts to be triggered when the monitor is in a "down" state| |`alert_down`|A list of Alerts to be triggered when the monitor is in a "down" state|
|`alert_up`|A list of Alerts to be triggered when the monitor moves to an "up" state| |`alert_up`|A list of Alerts to be triggered when the monitor moves to an "up" state|
|`check_interval`|The interval at which this monitor should be checked. This must be greater than the global `check_interval` value| |`check_interval`|The interval at which this monitor should be checked. This must be greater than the global `check_interval` value|
@ -81,53 +77,25 @@ Each monitor allows the following configuration:
### Alerts ### Alerts
Alerts exist as objects keyed under `alerts`. Their key should be the name of the Alert. This is used in your monitor setup in `alert_down` and `alert_up`. Alerts exist as objects keyed under `alerts`. Their key should be the name of the Alert. This is used in your monitor setup in `alerts`, `alert_down` and `alert_up`.
Eachy alert allows the following configuration: Each alert allows the following configuration:
|key|value| |key|value|
|---|---| |---|---|
|`command`|Specifies the command that should be executed, either in exec or shell form. This is the command that will be run when the alert is executed. This can be templated with environment variables or the variables shown in the table below| |`command`|Specifies the command that should be executed, either in exec or shell form. This is the command that will be run when the alert is executed. This can be templated with environment variables or the variables shown in the table below|
Also, when alerts are executed, they will be passed through Go's format function with arguments for some attributes of the Monitor. The following monitor specific variables can be referenced using Go formatting syntax: Also, when alerts are executed, they will be passed through Go's templating engine with arguments for some attributes of the Monitor. The following monitor specific variables can be referenced using Go formatting syntax:
|token|value| |token|value|
|---|---| |---|---|
|`{{.AlertCount}}`|Number of times this monitor has alerted| |`{{.AlertCount}}`|Number of times this monitor has alerted|
|`{{.FailureCount}}`|The total number of sequential failed checks for this monitor| |`{{.FailureCount}}`|The total number of sequential failed checks for this monitor|
|`{{.LastCheckOutput}}`|The last returned value from the check command to either stderr or stdout| |`{{.LastCheckOutput}}`|The last returned value from the check command to either stderr or stdout|
|`{{.LastSuccess}}`|The datetime of the last successful check as a go Time struct| |`{{.LastSuccess}}`|The ISO datetime of the last successful check|
|`{{.MonitorName}}`|The name of the monitor that failed and triggered the alert| |`{{.MonitorName}}`|The name of the monitor that failed and triggered the alert|
|`{{.IsUp}}`|Indicates if the monitor that is alerting is up or not. Can be used in a conditional message template| |`{{.IsUp}}`|Indicates if the monitor that is alerting is up or not. Can be used in a conditional message template|
To provide flexible formatting, the following non-standard functions are available in templates:
|func|description|
|---|---|
|`ANSIC <Time>`|Formats provided time in ANSIC format|
|`UnixDate <Time>`|Formats provided time in UnixDate format|
|`RubyDate <Time>`|Formats provided time in RubyDate format|
|`RFC822Z <Time>`|Formats provided time in RFC822Z format|
|`RFC850 <Time>`|Formats provided time in RFC850 format|
|`RFC1123 <Time>`|Formats provided time in RFC1123 format|
|`RFC1123Z <Time>`|Formats provided time in RFC1123Z format|
|`RFC3339 <Time>`|Formats provided time in RFC3339 format|
|`RFC3339Nano <Time>`|Formats provided time in RFC3339Nano format|
|`FormatTime <Time> <string template>`|Formats provided time according to provided template|
|`InTZ <Time> <string timezone name>`|Converts provided time to parsed timezone from the provided name|
For more information, check out the [Go documentation for the time module](https://pkg.go.dev/time@go1.20.7#pkg-constants).
#### Running alerts on startup
It's not the best feeling to find out your alerts are broken when you're expecting to be alerted about another failure. To avoid this and provide early insight into broken alerts, it is possible to specify a list of alerts to run when Minitor starts up. This can be done using the command line flag `-startup-alerts`. This flag accepts a comma separated list of strings and will run a test of each of those alerts. Minitor will then respond as it typically does for any failed alert. This can be used to allow you time to correct when initially launching, and to allow schedulers to more easily detect a failed deployment of Minitor.
Eg.
```bash
minitor -startup-alerts=log_down,log_up -config ./config.yml
```
### Metrics ### Metrics
Minitor supports exporting metrics for [Prometheus](https://prometheus.io/). Prometheus is an open source tool for reading and querying metrics from different sources. Combined with another tool, [Grafana](https://grafana.com/), it allows building of charts and dashboards. You could also opt to just use Minitor to log check results, and instead do your alerting with Grafana. Minitor supports exporting metrics for [Prometheus](https://prometheus.io/). Prometheus is an open source tool for reading and querying metrics from different sources. Combined with another tool, [Grafana](https://grafana.com/), it allows building of charts and dashboards. You could also opt to just use Minitor to log check results, and instead do your alerting with Grafana.
@ -144,7 +112,7 @@ minitor -metrics -metrics-port 3000
## Contributing ## Contributing
Whether you're looking to submit a patch or tell me I broke something, you can contribute through the Github mirror and I can merge PRs back to the source repository. Whether you're looking to submit a patch or just tell me I broke something, you can contribute through the Github mirror and I can merge PRs back to the source repository.
Primary Repo: https://git.iamthefij.com/iamthefij/minitor.git Primary Repo: https://git.iamthefij.com/iamthefij/minitor.git
@ -176,25 +144,15 @@ alerts:
command: 'echo {{.MonitorName}}' command: 'echo {{.MonitorName}}'
``` ```
Interval durations have changed from being an integer number of seconds to a duration string supported by Go, for example:
minitor-py:
```yaml
check_interval: 90
```
minitor-go:
```yaml
check_interval: 1m30s
```
For the time being, legacy configs for the Python version of Minitor should be compatible if you apply the `-py-compat` flag when running Minitor. Eventually, this flag will go away when later breaking changes are introduced. For the time being, legacy configs for the Python version of Minitor should be compatible if you apply the `-py-compat` flag when running Minitor. Eventually, this flag will go away when later breaking changes are introduced.
## Future ## Future
Future, potentially breaking changes Future, potentially breaking changes
- [ ] Implement leveled logging (maybe glog or logrus)
- [ ] Consider value of templating vs injecting values into Env variables - [ ] Consider value of templating vs injecting values into Env variables
- [ ] Async checking - [ ] Async checking
- [ ] Revisit metrics and see if they all make sense - [ ] Revisit metrics and see if they all make sense
- [ ] Consider dropping `alert_up` and `alert_down` in favor of using Go templates that offer more control of messaging (Breaking) - [ ] Consider dropping `alert_up` and `alert_down` in favor of using Go templates that offer more control of messaging (Breaking)
- [ ] Use durations rather than seconds checked in event loop (Potentially breaking)

99
alert.go
View File

@ -2,21 +2,12 @@ package main
import ( import (
"bytes" "bytes"
"errors"
"fmt" "fmt"
"log"
"os/exec" "os/exec"
"strings" "strings"
"text/template" "text/template"
"time" "time"
"git.iamthefij.com/iamthefij/slog"
)
var (
errNoTemplate = errors.New("no template")
// ErrAlertFailed indicates that an alert failed to send
ErrAlertFailed = errors.New("alert failed")
) )
// Alert is a config driven mechanism for sending a notice // Alert is a config driven mechanism for sending a notice
@ -29,12 +20,12 @@ type Alert struct {
// AlertNotice captures the context for an alert to be sent // AlertNotice captures the context for an alert to be sent
type AlertNotice struct { type AlertNotice struct {
MonitorName string
AlertCount int16 AlertCount int16
FailureCount int16 FailureCount int16
IsUp bool
LastSuccess time.Time
MonitorName string
LastCheckOutput string LastCheckOutput string
LastSuccess time.Time
IsUp bool
} }
// IsValid returns a boolean indicating if the Alert has been correctly // IsValid returns a boolean indicating if the Alert has been correctly
@ -54,64 +45,29 @@ func (alert *Alert) BuildTemplates() error {
"{last_success}", "{{.LastSuccess}}", "{last_success}", "{{.LastSuccess}}",
"{monitor_name}", "{{.MonitorName}}", "{monitor_name}", "{{.MonitorName}}",
) )
if LogDebug {
slog.Debugf("Building template for alert %s", alert.Name) log.Printf("DEBUG: Building template for alert %s", alert.Name)
// Time format func factory
tff := func(formatString string) func(time.Time) string {
return func(t time.Time) string {
return t.Format(formatString)
} }
} if alert.commandTemplate == nil && alert.Command.Command != nil {
// Create some functions for formatting datetimes in popular formats
timeFormatFuncs := template.FuncMap{
"ANSIC": tff(time.ANSIC),
"UnixDate": tff(time.UnixDate),
"RubyDate": tff(time.RubyDate),
"RFC822Z": tff(time.RFC822Z),
"RFC850": tff(time.RFC850),
"RFC1123": tff(time.RFC1123),
"RFC1123Z": tff(time.RFC1123Z),
"RFC3339": tff(time.RFC3339),
"RFC3339Nano": tff(time.RFC3339Nano),
"FormatTime": func(t time.Time, timeFormat string) string {
return t.Format(timeFormat)
},
"InTZ": func(t time.Time, tzName string) (time.Time, error) {
tz, err := time.LoadLocation(tzName)
if err != nil {
return t, fmt.Errorf("failed to convert time to specified tz: %w", err)
}
return t.In(tz), nil
},
}
switch {
case alert.commandTemplate == nil && alert.Command.Command != nil:
alert.commandTemplate = []*template.Template{} alert.commandTemplate = []*template.Template{}
for i, cmdPart := range alert.Command.Command { for i, cmdPart := range alert.Command.Command {
if PyCompat { if PyCompat {
cmdPart = legacy.Replace(cmdPart) cmdPart = legacy.Replace(cmdPart)
} }
alert.commandTemplate = append(alert.commandTemplate, template.Must( alert.commandTemplate = append(alert.commandTemplate, template.Must(
template.New(alert.Name+fmt.Sprint(i)).Funcs(timeFormatFuncs).Parse(cmdPart), template.New(alert.Name+string(i)).Parse(cmdPart),
)) ))
} }
case alert.commandShellTemplate == nil && alert.Command.ShellCommand != "": } else if alert.commandShellTemplate == nil && alert.Command.ShellCommand != "" {
shellCmd := alert.Command.ShellCommand shellCmd := alert.Command.ShellCommand
if PyCompat { if PyCompat {
shellCmd = legacy.Replace(shellCmd) shellCmd = legacy.Replace(shellCmd)
} }
alert.commandShellTemplate = template.Must( alert.commandShellTemplate = template.Must(
template.New(alert.Name).Funcs(timeFormatFuncs).Parse(shellCmd), template.New(alert.Name).Parse(shellCmd),
) )
default: } else {
return fmt.Errorf("No template provided for alert %s: %w", alert.Name, errNoTemplate) return fmt.Errorf("No template provided for alert %s", alert.Name)
} }
return nil return nil
@ -119,40 +75,30 @@ func (alert *Alert) BuildTemplates() error {
// Send will send an alert notice by executing the command template // Send will send an alert notice by executing the command template
func (alert Alert) Send(notice AlertNotice) (outputStr string, err error) { func (alert Alert) Send(notice AlertNotice) (outputStr string, err error) {
slog.Infof("Sending alert %s for %s", alert.Name, notice.MonitorName) log.Printf("INFO: Sending alert %s for %s", alert.Name, notice.MonitorName)
var cmd *exec.Cmd var cmd *exec.Cmd
if alert.commandTemplate != nil {
switch {
case alert.commandTemplate != nil:
command := []string{} command := []string{}
for _, cmdTmp := range alert.commandTemplate { for _, cmdTmp := range alert.commandTemplate {
var commandBuffer bytes.Buffer var commandBuffer bytes.Buffer
err = cmdTmp.Execute(&commandBuffer, notice) err = cmdTmp.Execute(&commandBuffer, notice)
if err != nil { if err != nil {
return return
} }
command = append(command, commandBuffer.String()) command = append(command, commandBuffer.String())
} }
cmd = exec.Command(command[0], command[1:]...) cmd = exec.Command(command[0], command[1:]...)
case alert.commandShellTemplate != nil: } else if alert.commandShellTemplate != nil {
var commandBuffer bytes.Buffer var commandBuffer bytes.Buffer
err = alert.commandShellTemplate.Execute(&commandBuffer, notice) err = alert.commandShellTemplate.Execute(&commandBuffer, notice)
if err != nil { if err != nil {
return return
} }
shellCommand := commandBuffer.String() shellCommand := commandBuffer.String()
cmd = ShellCommand(shellCommand) cmd = ShellCommand(shellCommand)
default: } else {
err = fmt.Errorf("No templates compiled for alert %s: %w", alert.Name, errNoTemplate) err = fmt.Errorf("No templates compiled for alert %v", alert.Name)
return return
} }
@ -164,15 +110,8 @@ func (alert Alert) Send(notice AlertNotice) (outputStr string, err error) {
var output []byte var output []byte
output, err = cmd.CombinedOutput() output, err = cmd.CombinedOutput()
outputStr = string(output) outputStr = string(output)
slog.Debugf("Alert output for: %s\n---\n%s\n---", alert.Name, outputStr) if LogDebug {
log.Printf("DEBUG: Alert output for: %s\n---\n%s\n---", alert.Name, outputStr)
if err != nil {
err = fmt.Errorf(
"Alert %s failed to send. Returned %w: %w",
alert.Name,
err,
ErrAlertFailed,
)
} }
return outputStr, err return outputStr, err

17
alert_test.go
View File

@ -18,13 +18,11 @@ func TestAlertIsValid(t *testing.T) {
for _, c := range cases { for _, c := range cases {
log.Printf("Testing case %s", c.name) log.Printf("Testing case %s", c.name)
actual := c.alert.IsValid() actual := c.alert.IsValid()
if actual != c.expected { if actual != c.expected {
t.Errorf("IsValid(%v), expected=%t actual=%t", c.name, c.expected, actual) t.Errorf("IsValid(%v), expected=%t actual=%t", c.name, c.expected, actual)
log.Printf("Case failed: %s", c.name) log.Printf("Case failed: %s", c.name)
} }
log.Println("-----") log.Println("-----")
} }
} }
@ -102,28 +100,19 @@ func TestAlertSend(t *testing.T) {
log.Printf("Testing case %s", c.name) log.Printf("Testing case %s", c.name)
// Set PyCompat to value of compat flag // Set PyCompat to value of compat flag
PyCompat = c.pyCompat PyCompat = c.pyCompat
c.alert.BuildTemplates()
err := c.alert.BuildTemplates()
if err != nil {
t.Errorf("Send(%v output), error building templates: %v", c.name, err)
}
output, err := c.alert.Send(c.notice) output, err := c.alert.Send(c.notice)
hasErr := (err != nil) hasErr := (err != nil)
if output != c.expectedOutput { if output != c.expectedOutput {
t.Errorf("Send(%v output), expected=%v actual=%v", c.name, c.expectedOutput, output) t.Errorf("Send(%v output), expected=%v actual=%v", c.name, c.expectedOutput, output)
log.Printf("Case failed: %s", c.name) log.Printf("Case failed: %s", c.name)
} }
if hasErr != c.expectErr { if hasErr != c.expectErr {
t.Errorf("Send(%v err), expected=%v actual=%v", c.name, "Err", err) t.Errorf("Send(%v err), expected=%v actual=%v", c.name, "Err", err)
log.Printf("Case failed: %s", c.name) log.Printf("Case failed: %s", c.name)
} }
// Set PyCompat back to default value // Set PyCompat back to default value
PyCompat = false PyCompat = false
log.Println("-----") log.Println("-----")
} }
} }
@ -131,12 +120,10 @@ func TestAlertSend(t *testing.T) {
func TestAlertSendNoTemplates(t *testing.T) { func TestAlertSendNoTemplates(t *testing.T) {
alert := Alert{} alert := Alert{}
notice := AlertNotice{} notice := AlertNotice{}
output, err := alert.Send(notice) output, err := alert.Send(notice)
if err == nil { if err == nil {
t.Errorf("Send(no template), expected=%v actual=%v", "Err", output) t.Errorf("Send(no template), expected=%v actual=%v", "Err", output)
} }
log.Println("-----") log.Println("-----")
} }
@ -155,12 +142,10 @@ func TestAlertBuildTemplate(t *testing.T) {
log.Printf("Testing case %s", c.name) log.Printf("Testing case %s", c.name)
err := c.alert.BuildTemplates() err := c.alert.BuildTemplates()
hasErr := (err != nil) hasErr := (err != nil)
if hasErr != c.expectErr { if hasErr != c.expectErr {
t.Errorf("IsValid(%v), expected=%t actual=%t", c.name, c.expectErr, err) t.Errorf("IsValid(%v), expected=%t actual=%t", c.name, c.expectErr, err)
log.Printf("Case failed: %s", c.name) log.Printf("Case failed: %s", c.name)
} }
log.Println("-----") log.Println("-----")
} }
} }

108
config.go
View File

@ -2,22 +2,15 @@ package main
import ( import (
"errors" "errors"
"os" "io/ioutil"
"time" "log"
"git.iamthefij.com/iamthefij/slog"
"gopkg.in/yaml.v2" "gopkg.in/yaml.v2"
) )
var errInvalidConfig = errors.New("Invalid configuration")
// Config type is contains all provided user configuration // Config type is contains all provided user configuration
type Config struct { type Config struct {
CheckInterval SecondsOrDuration `yaml:"check_interval"` CheckInterval int64 `yaml:"check_interval"`
DefaultAlertAfter int16 `yaml:"default_alert_after"`
DefaultAlertEvery *int16 `yaml:"default_alert_every"`
DefaultAlertDown []string `yaml:"default_alert_down"`
DefaultAlertUp []string `yaml:"default_alert_up"`
Monitors []*Monitor Monitors []*Monitor
Alerts map[string]*Alert Alerts map[string]*Alert
} }
@ -42,48 +35,17 @@ func (cos *CommandOrShell) UnmarshalYAML(unmarshal func(interface{}) error) erro
// Error indicates this is shell command // Error indicates this is shell command
if err != nil { if err != nil {
var shellCmd string var shellCmd string
err := unmarshal(&shellCmd) err := unmarshal(&shellCmd)
if err != nil { if err != nil {
return err return err
} }
cos.ShellCommand = shellCmd cos.ShellCommand = shellCmd
} else { } else {
cos.Command = cmd cos.Command = cmd
} }
return nil return nil
} }
// SecondsOrDuration wraps a duration value for parsing a duration or seconds from YAML
// NOTE: This should be removed in favor of only parsing durations once compatibility is broken
type SecondsOrDuration struct {
value time.Duration
}
// Value returns a duration value
func (sod SecondsOrDuration) Value() time.Duration {
return sod.value
}
// UnmarshalYAML allows unmarshalling a duration value or seconds if an int was provided
func (sod *SecondsOrDuration) UnmarshalYAML(unmarshal func(interface{}) error) error {
var seconds int64
err := unmarshal(&seconds)
if err == nil {
sod.value = time.Second * time.Duration(seconds)
return nil
}
// Error indicates that we don't have an int
err = unmarshal(&sod.value)
return err
}
// IsValid checks config validity and returns true if valid // IsValid checks config validity and returns true if valid
func (config Config) IsValid() (isValid bool) { func (config Config) IsValid() (isValid bool) {
isValid = true isValid = true
@ -91,75 +53,47 @@ func (config Config) IsValid() (isValid bool) {
// Validate alerts // Validate alerts
if config.Alerts == nil || len(config.Alerts) == 0 { if config.Alerts == nil || len(config.Alerts) == 0 {
// This should never happen because there is a default alert named 'log' for now // This should never happen because there is a default alert named 'log' for now
slog.Errorf("Invalid alert configuration: Must provide at least one alert") log.Printf("ERROR: Invalid alert configuration: Must provide at least one alert")
isValid = false isValid = false
} }
for _, alert := range config.Alerts { for _, alert := range config.Alerts {
if !alert.IsValid() { if !alert.IsValid() {
slog.Errorf("Invalid alert configuration: %+v", alert.Name) log.Printf("ERROR: Invalid alert configuration: %s", alert.Name)
isValid = false isValid = false
} else {
slog.Debugf("Loaded alert %s", alert.Name)
} }
} }
// Validate monitors // Validate monitors
if config.Monitors == nil || len(config.Monitors) == 0 { if config.Monitors == nil || len(config.Monitors) == 0 {
slog.Errorf("Invalid monitor configuration: Must provide at least one monitor") log.Printf("ERROR: Invalid monitor configuration: Must provide at least one monitor")
isValid = false isValid = false
} }
for _, monitor := range config.Monitors { for _, monitor := range config.Monitors {
if !monitor.IsValid() { if !monitor.IsValid() {
slog.Errorf("Invalid monitor configuration: %s", monitor.Name) log.Printf("ERROR: Invalid monitor configuration: %s", monitor.Name)
isValid = false isValid = false
} }
// Check that all Monitor alerts actually exist // Check that all Monitor alerts actually exist
for _, isUp := range []bool{true, false} { for _, isUp := range []bool{true, false} {
for _, alertName := range monitor.GetAlertNames(isUp) { for _, alertName := range monitor.GetAlertNames(isUp) {
if _, ok := config.Alerts[alertName]; !ok { if _, ok := config.Alerts[alertName]; !ok {
slog.Errorf( log.Printf(
"Invalid monitor configuration: %s. Unknown alert %s", "ERROR: Invalid monitor configuration: %s. Unknown alert %s",
monitor.Name, alertName, monitor.Name, alertName,
) )
isValid = false isValid = false
} }
} }
} }
} }
return isValid return
} }
// Init performs extra initialization on top of loading the config from file // Init performs extra initialization on top of loading the config from file
func (config *Config) Init() (err error) { func (config *Config) Init() (err error) {
for _, monitor := range config.Monitors {
if monitor.AlertAfter == 0 && config.DefaultAlertAfter > 0 {
monitor.AlertAfter = config.DefaultAlertAfter
}
if monitor.AlertEvery == nil && config.DefaultAlertEvery != nil {
monitor.AlertEvery = config.DefaultAlertEvery
}
if len(monitor.AlertDown) == 0 && len(config.DefaultAlertDown) > 0 {
monitor.AlertDown = config.DefaultAlertDown
}
if len(monitor.AlertUp) == 0 && len(config.DefaultAlertUp) > 0 {
monitor.AlertUp = config.DefaultAlertUp
}
}
for name, alert := range config.Alerts { for name, alert := range config.Alerts {
alert.Name = name alert.Name = name
if err = alert.BuildTemplates(); err != nil { if err = alert.BuildTemplates(); err != nil {
return return
} }
@ -170,7 +104,7 @@ func (config *Config) Init() (err error) {
// LoadConfig will read config from the given path and parse it // LoadConfig will read config from the given path and parse it
func LoadConfig(filePath string) (config Config, err error) { func LoadConfig(filePath string) (config Config, err error) {
data, err := os.ReadFile(filePath) data, err := ioutil.ReadFile(filePath)
if err != nil { if err != nil {
return return
} }
@ -180,30 +114,28 @@ func LoadConfig(filePath string) (config Config, err error) {
return return
} }
slog.Debugf("Config values:\n%v\n", config) if LogDebug {
log.Printf("DEBUG: Config values:\n%v\n", config)
}
// Add log alert if not present // Add log alert if not present
if PyCompat { if PyCompat {
// Initialize alerts list if not present // Intialize alerts list if not present
if config.Alerts == nil { if config.Alerts == nil {
config.Alerts = map[string]*Alert{} config.Alerts = map[string]*Alert{}
} }
if _, ok := config.Alerts["log"]; !ok { if _, ok := config.Alerts["log"]; !ok {
config.Alerts["log"] = NewLogAlert() config.Alerts["log"] = NewLogAlert()
} }
} }
// Finish initializing configuration
if err = config.Init(); err != nil {
return
}
if !config.IsValid() { if !config.IsValid() {
err = errInvalidConfig err = errors.New("Invalid configuration")
return return
} }
return config, err // Finish initializing configuration
err = config.Init()
return
} }

43
config_test.go
View File

@ -3,7 +3,6 @@ package main
import ( import (
"log" "log"
"testing" "testing"
"time"
) )
func TestLoadConfig(t *testing.T) { func TestLoadConfig(t *testing.T) {
@ -14,7 +13,6 @@ func TestLoadConfig(t *testing.T) {
pyCompat bool pyCompat bool
}{ }{
{"./test/valid-config.yml", false, "Valid config file", false}, {"./test/valid-config.yml", false, "Valid config file", false},
{"./test/valid-config-default-values.yml", false, "Valid config file with default values", false},
{"./test/valid-default-log-alert.yml", false, "Valid config file with default log alert PyCompat", true}, {"./test/valid-default-log-alert.yml", false, "Valid config file with default log alert PyCompat", true},
{"./test/valid-default-log-alert.yml", true, "Invalid config file no log alert", false}, {"./test/valid-default-log-alert.yml", true, "Invalid config file no log alert", false},
{"./test/does-not-exist", true, "Invalid config path", false}, {"./test/does-not-exist", true, "Invalid config path", false},
@ -29,50 +27,20 @@ func TestLoadConfig(t *testing.T) {
PyCompat = c.pyCompat PyCompat = c.pyCompat
_, err := LoadConfig(c.configPath) _, err := LoadConfig(c.configPath)
hasErr := (err != nil) hasErr := (err != nil)
if hasErr != c.expectErr { if hasErr != c.expectErr {
t.Errorf("LoadConfig(%v), expected_error=%v actual=%v", c.name, c.expectErr, err) t.Errorf("LoadConfig(%v), expected_error=%v actual=%v", c.name, c.expectErr, err)
log.Printf("Case failed: %s", c.name) log.Printf("Case failed: %s", c.name)
} }
// Set PyCompat to default value // Set PyCompat to default value
PyCompat = false PyCompat = false
}
}
func TestIntervalParsing(t *testing.T) {
log.Printf("Testing case TestIntervalParsing")
config, err := LoadConfig("./test/valid-config.yml")
if err != nil {
t.Errorf("Failed loading config: %v", err)
}
oneSecond := time.Second
tenSeconds := 10 * time.Second
oneMinute := time.Minute
// validate top level interval seconds represented as an int
if config.CheckInterval.Value() != oneSecond {
t.Errorf("Incorrectly parsed int seconds. expected=%v actual=%v", oneSecond, config.CheckInterval)
}
if config.Monitors[0].CheckInterval.Value() != tenSeconds {
t.Errorf("Incorrectly parsed seconds duration. expected=%v actual=%v", oneSecond, config.CheckInterval)
}
if config.Monitors[1].CheckInterval.Value() != oneMinute {
t.Errorf("Incorrectly parsed seconds duration. expected=%v actual=%v", oneSecond, config.CheckInterval)
}
log.Println("-----") log.Println("-----")
}
} }
// TestMultiLineConfig is a more complicated test stepping through the parsing // TestMultiLineConfig is a more complicated test stepping through the parsing
// and execution of mutli-line strings presented in YAML // and execution of mutli-line strings presented in YAML
func TestMultiLineConfig(t *testing.T) { func TestMultiLineConfig(t *testing.T) {
log.Println("Testing multi-line string config") log.Println("Testing multi-line string config")
config, err := LoadConfig("./test/valid-verify-multi-line.yml") config, err := LoadConfig("./test/valid-verify-multi-line.yml")
if err != nil { if err != nil {
t.Fatalf("TestMultiLineConfig(load), expected=no_error actual=%v", err) t.Fatalf("TestMultiLineConfig(load), expected=no_error actual=%v", err)
@ -80,10 +48,8 @@ func TestMultiLineConfig(t *testing.T) {
log.Println("-----") log.Println("-----")
log.Println("TestMultiLineConfig(parse > string)") log.Println("TestMultiLineConfig(parse > string)")
expected := "echo 'Some string with stuff'; echo \"<angle brackets>\"; exit 1\n" expected := "echo 'Some string with stuff'; echo \"<angle brackets>\"; exit 1\n"
actual := config.Monitors[0].Command.ShellCommand actual := config.Monitors[0].Command.ShellCommand
if expected != actual { if expected != actual {
t.Errorf("TestMultiLineConfig(>) failed") t.Errorf("TestMultiLineConfig(>) failed")
t.Logf("string expected=`%v`", expected) t.Logf("string expected=`%v`", expected)
@ -94,15 +60,12 @@ func TestMultiLineConfig(t *testing.T) {
log.Println("-----") log.Println("-----")
log.Println("TestMultiLineConfig(execute > string)") log.Println("TestMultiLineConfig(execute > string)")
_, notice := config.Monitors[0].Check() _, notice := config.Monitors[0].Check()
if notice == nil { if notice == nil {
t.Fatalf("Did not receive an alert notice") t.Fatalf("Did not receive an alert notice")
} }
expected = "Some string with stuff\n<angle brackets>\n" expected = "Some string with stuff\n<angle brackets>\n"
actual = notice.LastCheckOutput actual = notice.LastCheckOutput
if expected != actual { if expected != actual {
t.Errorf("TestMultiLineConfig(execute > string) check failed") t.Errorf("TestMultiLineConfig(execute > string) check failed")
t.Logf("string expected=`%v`", expected) t.Logf("string expected=`%v`", expected)
@ -113,10 +76,8 @@ func TestMultiLineConfig(t *testing.T) {
log.Println("-----") log.Println("-----")
log.Println("TestMultiLineConfig(parse | string)") log.Println("TestMultiLineConfig(parse | string)")
expected = "echo 'Some string with stuff'\necho '<angle brackets>'\n" expected = "echo 'Some string with stuff'\necho '<angle brackets>'\n"
actual = config.Alerts["log_shell"].Command.ShellCommand actual = config.Alerts["log_shell"].Command.ShellCommand
if expected != actual { if expected != actual {
t.Errorf("TestMultiLineConfig(|) failed") t.Errorf("TestMultiLineConfig(|) failed")
t.Logf("string expected=`%v`", expected) t.Logf("string expected=`%v`", expected)
@ -127,12 +88,10 @@ func TestMultiLineConfig(t *testing.T) {
log.Println("-----") log.Println("-----")
log.Println("TestMultiLineConfig(execute | string)") log.Println("TestMultiLineConfig(execute | string)")
actual, err = config.Alerts["log_shell"].Send(AlertNotice{}) actual, err = config.Alerts["log_shell"].Send(AlertNotice{})
if err != nil { if err != nil {
t.Errorf("Execution of alert failed") t.Errorf("Execution of alert failed")
} }
expected = "Some string with stuff\n<angle brackets>\n" expected = "Some string with stuff\n<angle brackets>\n"
if expected != actual { if expected != actual {
t.Errorf("TestMultiLineConfig(execute | string) check failed") t.Errorf("TestMultiLineConfig(execute | string) check failed")

21
go.mod
View File

@ -1,23 +1,8 @@
module git.iamthefij.com/iamthefij/minitor-go module git.iamthefij.com/iamthefij/minitor-go
go 1.20 go 1.12
require ( require (
git.iamthefij.com/iamthefij/slog v1.3.0 github.com/prometheus/client_golang v1.2.1
github.com/prometheus/client_golang v1.19.0 gopkg.in/yaml.v2 v2.2.4
gopkg.in/yaml.v2 v2.4.0
)
require (
github.com/beorn7/perks v1.0.1 // indirect
github.com/cespare/xxhash/v2 v2.2.0 // indirect
github.com/golang/protobuf v1.5.3 // indirect
github.com/kr/text v0.2.0 // indirect
github.com/matttproud/golang_protobuf_extensions v1.0.4 // indirect
github.com/prometheus/client_model v0.5.0 // indirect
github.com/prometheus/common v0.48.0 // indirect
github.com/prometheus/procfs v0.12.0 // indirect
github.com/rogpeppe/go-internal v1.10.0 // indirect
golang.org/x/sys v0.16.0 // indirect
google.golang.org/protobuf v1.33.0 // indirect
) )

496
go.sum
View File

@ -1,546 +1,78 @@
cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
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golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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google.golang.org/api v0.4.0/go.mod h1:8k5glujaEP+g9n7WNsDg8QP6cUVNI86fCNMcbazEtwE=
google.golang.org/api v0.7.0/go.mod h1:WtwebWUNSVBH/HAw79HIFXZNqEvBhG+Ra+ax0hx3E3M=
google.golang.org/api v0.8.0/go.mod h1:o4eAsZoiT+ibD93RtjEohWalFOjRDx6CVaqeizhEnKg=
google.golang.org/api v0.9.0/go.mod h1:o4eAsZoiT+ibD93RtjEohWalFOjRDx6CVaqeizhEnKg=
google.golang.org/api v0.13.0/go.mod h1:iLdEw5Ide6rF15KTC1Kkl0iskquN2gFfn9o9XIsbkAI=
google.golang.org/api v0.14.0/go.mod h1:iLdEw5Ide6rF15KTC1Kkl0iskquN2gFfn9o9XIsbkAI=
google.golang.org/api v0.15.0/go.mod h1:iLdEw5Ide6rF15KTC1Kkl0iskquN2gFfn9o9XIsbkAI=
google.golang.org/api v0.17.0/go.mod h1:BwFmGc8tA3vsd7r/7kR8DY7iEEGSU04BFxCo5jP/sfE=
google.golang.org/api v0.18.0/go.mod h1:BwFmGc8tA3vsd7r/7kR8DY7iEEGSU04BFxCo5jP/sfE=
google.golang.org/api v0.19.0/go.mod h1:BwFmGc8tA3vsd7r/7kR8DY7iEEGSU04BFxCo5jP/sfE=
google.golang.org/api v0.20.0/go.mod h1:BwFmGc8tA3vsd7r/7kR8DY7iEEGSU04BFxCo5jP/sfE=
google.golang.org/api v0.22.0/go.mod h1:BwFmGc8tA3vsd7r/7kR8DY7iEEGSU04BFxCo5jP/sfE=
google.golang.org/api v0.24.0/go.mod h1:lIXQywCXRcnZPGlsd8NbLnOjtAoL6em04bJ9+z0MncE=
google.golang.org/api v0.28.0/go.mod h1:lIXQywCXRcnZPGlsd8NbLnOjtAoL6em04bJ9+z0MncE=
google.golang.org/api v0.29.0/go.mod h1:Lcubydp8VUV7KeIHD9z2Bys/sm/vGKnG1UHuDBSrHWM=
google.golang.org/api v0.30.0/go.mod h1:QGmEvQ87FHZNiUVJkT14jQNYJ4ZJjdRF23ZXz5138Fc=
google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
google.golang.org/appengine v1.5.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
google.golang.org/appengine v1.6.1/go.mod h1:i06prIuMbXzDqacNJfV5OdTW448YApPu5ww/cMBSeb0=
google.golang.org/appengine v1.6.5/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCIDZVag1xfc=
google.golang.org/appengine v1.6.6/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCIDZVag1xfc=
google.golang.org/appengine v1.6.7/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCIDZVag1xfc=
google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
google.golang.org/genproto v0.0.0-20190307195333-5fe7a883aa19/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
google.golang.org/genproto v0.0.0-20190418145605-e7d98fc518a7/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
google.golang.org/genproto v0.0.0-20190425155659-357c62f0e4bb/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
google.golang.org/genproto v0.0.0-20190502173448-54afdca5d873/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
google.golang.org/genproto v0.0.0-20190801165951-fa694d86fc64/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
google.golang.org/genproto v0.0.0-20190911173649-1774047e7e51/go.mod h1:IbNlFCBrqXvoKpeg0TB2l7cyZUmoaFKYIwrEpbDKLA8=
google.golang.org/genproto v0.0.0-20191108220845-16a3f7862a1a/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
google.golang.org/genproto v0.0.0-20191115194625-c23dd37a84c9/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
google.golang.org/genproto v0.0.0-20191216164720-4f79533eabd1/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
google.golang.org/genproto v0.0.0-20191230161307-f3c370f40bfb/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
google.golang.org/genproto v0.0.0-20200115191322-ca5a22157cba/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
google.golang.org/genproto v0.0.0-20200122232147-0452cf42e150/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
google.golang.org/genproto v0.0.0-20200204135345-fa8e72b47b90/go.mod h1:GmwEX6Z4W5gMy59cAlVYjN9JhxgbQH6Gn+gFDQe2lzA=
google.golang.org/genproto v0.0.0-20200212174721-66ed5ce911ce/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
google.golang.org/genproto v0.0.0-20200224152610-e50cd9704f63/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
google.golang.org/genproto v0.0.0-20200228133532-8c2c7df3a383/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
google.golang.org/genproto v0.0.0-20200305110556-506484158171/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
google.golang.org/genproto v0.0.0-20200312145019-da6875a35672/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
google.golang.org/genproto v0.0.0-20200331122359-1ee6d9798940/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
google.golang.org/genproto v0.0.0-20200430143042-b979b6f78d84/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
google.golang.org/genproto v0.0.0-20200511104702-f5ebc3bea380/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
google.golang.org/genproto v0.0.0-20200515170657-fc4c6c6a6587/go.mod h1:YsZOwe1myG/8QRHRsmBRE1LrgQY60beZKjly0O1fX9U=
google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013/go.mod h1:NbSheEEYHJ7i3ixzK3sjbqSGDJWnxyFXZblF3eUsNvo=
google.golang.org/genproto v0.0.0-20200618031413-b414f8b61790/go.mod h1:jDfRM7FcilCzHH/e9qn6dsT145K34l5v+OpcnNgKAAA=
google.golang.org/genproto v0.0.0-20200729003335-053ba62fc06f/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
google.golang.org/genproto v0.0.0-20200804131852-c06518451d9c/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
google.golang.org/genproto v0.0.0-20200825200019-8632dd797987/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
google.golang.org/grpc v1.25.1/go.mod h1:c3i+UQWmh7LiEpx4sFZnkU36qjEYZ0imhYfXVyQciAY=
google.golang.org/grpc v1.26.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
google.golang.org/grpc v1.27.1/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
google.golang.org/grpc v1.28.0/go.mod h1:rpkK4SK4GF4Ach/+MFLZUBavHOvF2JJB5uozKKal+60=
google.golang.org/grpc v1.29.1/go.mod h1:itym6AZVZYACWQqET3MqgPpjcuV5QH3BxFS3IjizoKk=
google.golang.org/grpc v1.30.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
google.golang.org/grpc v1.31.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
google.golang.org/protobuf v1.20.1-0.20200309200217-e05f789c0967/go.mod h1:A+miEFZTKqfCUM6K7xSMQL9OKL/b6hQv+e19PK+JZNE=
google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
google.golang.org/protobuf v1.22.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
google.golang.org/protobuf v1.24.0/go.mod h1:r/3tXBNzIEhYS9I1OUVjXDlt8tc493IdKGjtUeSXeh4=
google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
google.golang.org/protobuf v1.28.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
google.golang.org/protobuf v1.28.1/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
google.golang.org/protobuf v1.30.0 h1:kPPoIgf3TsEvrm0PFe15JQ+570QVxYzEvvHqChK+cng=
google.golang.org/protobuf v1.30.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
google.golang.org/protobuf v1.32.0 h1:pPC6BG5ex8PDFnkbrGU3EixyhKcQ2aDuBS36lqK/C7I=
google.golang.org/protobuf v1.32.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
google.golang.org/protobuf v1.33.0 h1:uNO2rsAINq/JlFpSdYEKIZ0uKD/R9cpdv0T+yoGwGmI=
google.golang.org/protobuf v1.33.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw= gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.2.4 h1:/eiJrUcujPVeJ3xlSWaiNi3uSVmDGBK1pDHUHAnao1I=
gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.2.5/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
honnef.co/go/tools v0.0.1-2020.1.4/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=

142
main.go
View File

@ -1,16 +1,16 @@
package main package main
import ( import (
"errors"
"flag" "flag"
"fmt" "fmt"
"strings" "log"
"time" "time"
"git.iamthefij.com/iamthefij/slog"
) )
var ( var (
// LogDebug will control whether debug messsages should be logged
LogDebug = false
// ExportMetrics will track whether or not we want to export metrics to prometheus // ExportMetrics will track whether or not we want to export metrics to prometheus
ExportMetrics = false ExportMetrics = false
// MetricsPort is the port to expose metrics on // MetricsPort is the port to expose metrics on
@ -23,149 +23,101 @@ var (
// version of minitor being run // version of minitor being run
version = "dev" version = "dev"
errUnknownAlert = errors.New("unknown alert")
) )
func sendAlerts(config *Config, monitor *Monitor, alertNotice *AlertNotice) error { func checkMonitors(config *Config) error {
slog.Debugf("Received an alert notice from %s", alertNotice.MonitorName) for _, monitor := range config.Monitors {
alertNames := monitor.GetAlertNames(alertNotice.IsUp) if monitor.ShouldCheck() {
success, alertNotice := monitor.Check()
hasAlert := alertNotice != nil
// Track status metrics
Metrics.SetMonitorStatus(monitor.Name, success)
Metrics.CountCheck(monitor.Name, success, hasAlert)
// Should probably consider refactoring everything below here
if alertNotice != nil {
if LogDebug {
log.Printf("DEBUG: Recieved an alert notice from %s", alertNotice.MonitorName)
}
alertNames := monitor.GetAlertNames(alertNotice.IsUp)
if alertNames == nil { if alertNames == nil {
// This should only happen for a recovery alert. AlertDown is validated not empty // This should only happen for a recovery alert. AlertDown is validated not empty
slog.Warningf( log.Printf(
"Received alert, but no alert mechanisms exist. MonitorName=%s IsUp=%t", "WARNING: Recieved alert, but no alert mechanisms exist. MonitorName=%s IsUp=%t",
alertNotice.MonitorName, alertNotice.IsUp, alertNotice.MonitorName, alertNotice.IsUp,
) )
return nil
} }
for _, alertName := range alertNames { for _, alertName := range alertNames {
if alert, ok := config.Alerts[alertName]; ok { if alert, ok := config.Alerts[alertName]; ok {
output, err := alert.Send(*alertNotice) output, err := alert.Send(*alertNotice)
if err != nil { if err != nil {
slog.Errorf( log.Printf(
"Alert '%s' failed. result=%v: output=%s", "ERROR: Alert '%s' failed. result=%v: output=%s",
alert.Name, alert.Name,
err, err,
output, output,
) )
return fmt.Errorf(
return err "Unsuccessfully triggered alert '%s'. "+
"Crashing to avoid false negatives: %v",
alert.Name,
err,
)
} }
// Count alert metrics // Count alert metrics
Metrics.CountAlert(monitor.Name, alert.Name) Metrics.CountAlert(monitor.Name, alert.Name)
} else { } else {
// This case should never actually happen since we validate against it // This case should never actually happen since we validate against it
slog.Errorf("Unknown alert for monitor %s: %s", alertNotice.MonitorName, alertName) log.Printf("ERROR: Unknown alert for monitor %s: %s", alertNotice.MonitorName, alertName)
return fmt.Errorf("Unknown alert for monitor %s: %s", alertNotice.MonitorName, alertName)
return fmt.Errorf("unknown alert for monitor %s: %s: %w", alertNotice.MonitorName, alertName, errUnknownAlert)
}
}
return nil
}
func checkMonitors(config *Config) error {
// TODO: Run this in goroutines and capture exceptions
for _, monitor := range config.Monitors {
if monitor.ShouldCheck() {
success, alertNotice := monitor.Check()
hasAlert := alertNotice != nil
// Track status metrics
Metrics.SetMonitorStatus(monitor.Name, monitor.IsUp())
Metrics.CountCheck(monitor.Name, success, monitor.LastCheckMilliseconds(), hasAlert)
if alertNotice != nil {
err := sendAlerts(config, monitor, alertNotice)
// If there was an error in sending an alert, exit early and bubble it up
if err != nil {
return err
} }
} }
} }
} }
return nil
}
func sendStartupAlerts(config *Config, alertNames []string) error {
for _, alertName := range alertNames {
var err error
alert, ok := config.Alerts[alertName]
if !ok {
err = fmt.Errorf("unknown alert %s: %w", alertName, errUnknownAlert)
}
if err == nil {
_, err = alert.Send(AlertNotice{
AlertCount: 0,
FailureCount: 0,
IsUp: true,
LastSuccess: time.Now(),
MonitorName: fmt.Sprintf("First Run Alert Test: %s", alert.Name),
LastCheckOutput: "",
})
}
if err != nil {
return err
}
} }
return nil return nil
} }
func main() { func main() {
showVersion := flag.Bool("version", false, "Display the version of minitor and exit") // Get debug flag
configPath := flag.String("config", "config.yml", "Alternate configuration path (default: config.yml)") flag.BoolVar(&LogDebug, "debug", false, "Enables debug logs (default: false)")
startupAlerts := flag.String("startup-alerts", "", "List of alerts to run on startup. This can help determine unhealthy alerts early on. (default \"\")")
flag.BoolVar(&slog.DebugLevel, "debug", false, "Enables debug logs (default: false)")
flag.BoolVar(&ExportMetrics, "metrics", false, "Enables prometheus metrics exporting (default: false)") flag.BoolVar(&ExportMetrics, "metrics", false, "Enables prometheus metrics exporting (default: false)")
flag.BoolVar(&PyCompat, "py-compat", false, "Enables support for legacy Python Minitor config. Will eventually be removed. (default: false)") flag.BoolVar(&PyCompat, "py-compat", false, "Enables support for legacy Python Minitor config. Will eventually be removed. (default: false)")
flag.IntVar(&MetricsPort, "metrics-port", MetricsPort, "The port that Prometheus metrics should be exported on, if enabled. (default: 8080)") flag.IntVar(&MetricsPort, "metrics-port", 8080, "The port that Prometheus metrics should be exported on, if enabled. (default: 8080)")
var showVersion = flag.Bool("version", false, "Display the version of minitor and exit")
var configPath = flag.String("config", "config.yml", "Alternate configuration path (default: config.yml)")
flag.Parse() flag.Parse()
// Print version if flag is provided // Print version if flag is provided
if *showVersion { if *showVersion {
fmt.Println("Minitor version:", version) log.Println("Minitor version:", version)
return return
} }
if PyCompat {
slog.Warningf("Python compatibility mode is enabled. This will be removed in the next major release. Please update your configuration.")
}
// Load configuration // Load configuration
config, err := LoadConfig(*configPath) config, err := LoadConfig(*configPath)
slog.OnErrFatalf(err, "Error loading config: %v", err) if err != nil {
log.Fatalf("Error loading config: %v", err)
}
// Serve metrics exporter, if specified // Serve metrics exporter, if specified
if ExportMetrics { if ExportMetrics {
slog.Infof("Exporting metrics to Prometheus on port %d", MetricsPort) log.Println("INFO: Exporting metrics to Prometheus")
go ServeMetrics() go ServeMetrics()
} }
if *startupAlerts != "" {
alertNames := strings.Split(*startupAlerts, ",")
err = sendStartupAlerts(&config, alertNames)
slog.OnErrPanicf(err, "Error running startup alerts")
}
// Start main loop // Start main loop
for { for {
err = checkMonitors(&config) err = checkMonitors(&config)
slog.OnErrPanicf(err, "Error checking monitors") if err != nil {
panic(err)
}
time.Sleep(config.CheckInterval.Value()) sleepTime := time.Duration(config.CheckInterval) * time.Second
time.Sleep(sleepTime)
} }
} }

127
main_test.go
View File

@ -16,7 +16,7 @@ func TestCheckMonitors(t *testing.T) {
{ {
config: Config{ config: Config{
Monitors: []*Monitor{ Monitors: []*Monitor{
{ &Monitor{
Name: "Success", Name: "Success",
Command: CommandOrShell{Command: []string{"true"}}, Command: CommandOrShell{Command: []string{"true"}},
}, },
@ -28,24 +28,36 @@ func TestCheckMonitors(t *testing.T) {
{ {
config: Config{ config: Config{
Monitors: []*Monitor{ Monitors: []*Monitor{
{ &Monitor{
Name: "Failure", Name: "Failure",
Command: CommandOrShell{Command: []string{"false"}}, Command: CommandOrShell{Command: []string{"false"}},
AlertAfter: 1, AlertAfter: 1,
}, },
&Monitor{
Name: "Failure",
Command: CommandOrShell{Command: []string{"false"}},
AlertDown: []string{"unknown"},
AlertAfter: 1,
},
}, },
}, },
expectErr: false, expectErr: false,
name: "Monitor failure, no alerts", name: "Monitor failure, no and unknown alerts",
}, },
{ {
config: Config{ config: Config{
Monitors: []*Monitor{ Monitors: []*Monitor{
{ &Monitor{
Name: "Success", Name: "Success",
Command: CommandOrShell{Command: []string{"ls"}}, Command: CommandOrShell{Command: []string{"ls"}},
alertCount: 1, alertCount: 1,
}, },
&Monitor{
Name: "Success",
Command: CommandOrShell{Command: []string{"true"}},
AlertUp: []string{"unknown"},
alertCount: 1,
},
}, },
}, },
expectErr: false, expectErr: false,
@ -54,35 +66,7 @@ func TestCheckMonitors(t *testing.T) {
{ {
config: Config{ config: Config{
Monitors: []*Monitor{ Monitors: []*Monitor{
{ &Monitor{
Name: "Failure",
Command: CommandOrShell{Command: []string{"false"}},
AlertDown: []string{"unknown"},
AlertAfter: 1,
},
},
},
expectErr: true,
name: "Monitor failure, unknown alerts",
},
{
config: Config{
Monitors: []*Monitor{
{
Name: "Success",
Command: CommandOrShell{Command: []string{"true"}},
AlertUp: []string{"unknown"},
alertCount: 1,
},
},
},
expectErr: true,
name: "Monitor recovery, unknown alerts",
},
{
config: Config{
Monitors: []*Monitor{
{
Name: "Failure", Name: "Failure",
Command: CommandOrShell{Command: []string{"false"}}, Command: CommandOrShell{Command: []string{"false"}},
AlertDown: []string{"good"}, AlertDown: []string{"good"},
@ -90,7 +74,7 @@ func TestCheckMonitors(t *testing.T) {
}, },
}, },
Alerts: map[string]*Alert{ Alerts: map[string]*Alert{
"good": { "good": &Alert{
Command: CommandOrShell{Command: []string{"true"}}, Command: CommandOrShell{Command: []string{"true"}},
}, },
}, },
@ -101,7 +85,7 @@ func TestCheckMonitors(t *testing.T) {
{ {
config: Config{ config: Config{
Monitors: []*Monitor{ Monitors: []*Monitor{
{ &Monitor{
Name: "Failure", Name: "Failure",
Command: CommandOrShell{Command: []string{"false"}}, Command: CommandOrShell{Command: []string{"false"}},
AlertDown: []string{"bad"}, AlertDown: []string{"bad"},
@ -109,7 +93,7 @@ func TestCheckMonitors(t *testing.T) {
}, },
}, },
Alerts: map[string]*Alert{ Alerts: map[string]*Alert{
"bad": { "bad": &Alert{
Name: "bad", Name: "bad",
Command: CommandOrShell{Command: []string{"false"}}, Command: CommandOrShell{Command: []string{"false"}},
}, },
@ -121,77 +105,10 @@ func TestCheckMonitors(t *testing.T) {
} }
for _, c := range cases { for _, c := range cases {
err := c.config.Init() c.config.Init()
if err != nil { err := checkMonitors(&c.config)
t.Errorf("checkMonitors(%s): unexpected error reading config: %v", c.name, err)
}
err = checkMonitors(&c.config)
if err == nil && c.expectErr { if err == nil && c.expectErr {
t.Errorf("checkMonitors(%s): Expected panic, the code did not panic", c.name) t.Errorf("checkMonitors(%s): Expected panic, the code did not panic", c.name)
} else if err != nil && !c.expectErr {
t.Errorf("checkMonitors(%s): Did not expect an error, but we got one anyway: %v", c.name, err)
}
}
}
func TestFirstRunAlerts(t *testing.T) {
cases := []struct {
config Config
expectErr bool
startupAlerts []string
name string
}{
{
config: Config{},
expectErr: false,
startupAlerts: []string{},
name: "Empty",
},
{
config: Config{},
expectErr: true,
startupAlerts: []string{"missing"},
name: "Unknown",
},
{
config: Config{
Alerts: map[string]*Alert{
"good": {
Command: CommandOrShell{Command: []string{"true"}},
},
},
},
expectErr: false,
startupAlerts: []string{"good"},
name: "Successful alert",
},
{
config: Config{
Alerts: map[string]*Alert{
"bad": {
Name: "bad",
Command: CommandOrShell{Command: []string{"false"}},
},
},
},
expectErr: true,
startupAlerts: []string{"bad"},
name: "Failed alert",
},
}
for _, c := range cases {
err := c.config.Init()
if err != nil {
t.Errorf("sendFirstRunAlerts(%s): unexpected error reading config: %v", c.name, err)
}
err = sendStartupAlerts(&c.config, c.startupAlerts)
if err == nil && c.expectErr {
t.Errorf("sendFirstRunAlerts(%s): Expected error, the code did not error", c.name)
} else if err != nil && !c.expectErr {
t.Errorf("sendFirstRunAlerts(%s): Did not expect an error, but we got one anyway: %v", c.name, err)
} }
} }
} }

25
manifest.tmpl Normal file
View File

@ -0,0 +1,25 @@
image: iamthefij/minitor-go:{{#if build.tag}}{{trimPrefix "v" build.tag}}{{else}}latest{{/if}}
{{#if build.tags}}
tags:
{{#each build.tags}}
- {{this}}
{{/each}}
{{/if}}
manifests:
-
image: iamthefij/minitor-go:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-amd64
platform:
architecture: amd64
os: linux
-
image: iamthefij/minitor-go:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-arm64
platform:
architecture: arm64
os: linux
variant: v8
-
image: iamthefij/minitor-go:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-arm
platform:
architecture: arm
os: linux
variant: v7

18
metrics.go
View File

@ -19,7 +19,6 @@ import (
type MinitorMetrics struct { type MinitorMetrics struct {
alertCount *prometheus.CounterVec alertCount *prometheus.CounterVec
checkCount *prometheus.CounterVec checkCount *prometheus.CounterVec
checkTime *prometheus.GaugeVec
monitorStatus *prometheus.GaugeVec monitorStatus *prometheus.GaugeVec
} }
@ -41,13 +40,6 @@ func NewMetrics() *MinitorMetrics {
}, },
[]string{"monitor", "status", "is_alert"}, []string{"monitor", "status", "is_alert"},
), ),
checkTime: prometheus.NewGaugeVec(
prometheus.GaugeOpts{
Name: "minitor_check_milliseconds",
Help: "Time in miliseconds that a check ran for",
},
[]string{"monitor", "status"},
),
monitorStatus: prometheus.NewGaugeVec( monitorStatus: prometheus.NewGaugeVec(
prometheus.GaugeOpts{ prometheus.GaugeOpts{
Name: "minitor_monitor_up_count", Name: "minitor_monitor_up_count",
@ -60,7 +52,6 @@ func NewMetrics() *MinitorMetrics {
// Register newly created metrics // Register newly created metrics
prometheus.MustRegister(metrics.alertCount) prometheus.MustRegister(metrics.alertCount)
prometheus.MustRegister(metrics.checkCount) prometheus.MustRegister(metrics.checkCount)
prometheus.MustRegister(metrics.checkTime)
prometheus.MustRegister(metrics.monitorStatus) prometheus.MustRegister(metrics.monitorStatus)
return metrics return metrics
@ -72,12 +63,11 @@ func (metrics *MinitorMetrics) SetMonitorStatus(monitor string, isUp bool) {
if isUp { if isUp {
val = 1.0 val = 1.0
} }
metrics.monitorStatus.With(prometheus.Labels{"monitor": monitor}).Set(val) metrics.monitorStatus.With(prometheus.Labels{"monitor": monitor}).Set(val)
} }
// CountCheck counts the result of a particular Monitor check // CountCheck counts the result of a particular Monitor check
func (metrics *MinitorMetrics) CountCheck(monitor string, isSuccess bool, ms int64, isAlert bool) { func (metrics *MinitorMetrics) CountCheck(monitor string, isSuccess bool, isAlert bool) {
status := "failure" status := "failure"
if isSuccess { if isSuccess {
status = "success" status = "success"
@ -91,10 +81,6 @@ func (metrics *MinitorMetrics) CountCheck(monitor string, isSuccess bool, ms int
metrics.checkCount.With( metrics.checkCount.With(
prometheus.Labels{"monitor": monitor, "status": status, "is_alert": alertVal}, prometheus.Labels{"monitor": monitor, "status": status, "is_alert": alertVal},
).Inc() ).Inc()
metrics.checkTime.With(
prometheus.Labels{"monitor": monitor, "status": status},
).Set(float64(ms))
} }
// CountAlert counts an alert // CountAlert counts an alert
@ -110,8 +96,6 @@ func (metrics *MinitorMetrics) CountAlert(monitor string, alert string) {
// ServeMetrics starts an http server with a Prometheus metrics handler // ServeMetrics starts an http server with a Prometheus metrics handler
func ServeMetrics() { func ServeMetrics() {
http.Handle("/metrics", promhttp.Handler()) http.Handle("/metrics", promhttp.Handler())
host := fmt.Sprintf(":%d", MetricsPort) host := fmt.Sprintf(":%d", MetricsPort)
_ = http.ListenAndServe(host, nil) _ = http.ListenAndServe(host, nil)
} }

87
monitor.go
View File

@ -1,31 +1,29 @@
package main package main
import ( import (
"log"
"math" "math"
"os/exec" "os/exec"
"time" "time"
"git.iamthefij.com/iamthefij/slog"
) )
// Monitor represents a particular periodic check of a command // Monitor represents a particular periodic check of a command
type Monitor struct { //nolint:maligned type Monitor struct {
// Config values // Config values
AlertAfter int16 `yaml:"alert_after"`
AlertEvery *int16 `yaml:"alert_every"`
CheckInterval SecondsOrDuration `yaml:"check_interval"`
Name string Name string
Command CommandOrShell
Alerts []string
AlertDown []string `yaml:"alert_down"` AlertDown []string `yaml:"alert_down"`
AlertUp []string `yaml:"alert_up"` AlertUp []string `yaml:"alert_up"`
Command CommandOrShell CheckInterval float64 `yaml:"check_interval"`
AlertAfter int16 `yaml:"alert_after"`
AlertEvery int16 `yaml:"alert_every"`
// Other values // Other values
lastCheck time.Time
lastOutput string
alertCount int16 alertCount int16
failureCount int16 failureCount int16
lastCheck time.Time
lastSuccess time.Time lastSuccess time.Time
lastOutput string
lastCheckDuration time.Duration
} }
// IsValid returns a boolean indicating if the Monitor has been correctly // IsValid returns a boolean indicating if the Monitor has been correctly
@ -33,7 +31,7 @@ type Monitor struct { //nolint:maligned
func (monitor Monitor) IsValid() bool { func (monitor Monitor) IsValid() bool {
return (!monitor.Command.Empty() && return (!monitor.Command.Empty() &&
monitor.getAlertAfter() > 0 && monitor.getAlertAfter() > 0 &&
monitor.AlertDown != nil) (monitor.Alerts != nil || monitor.AlertDown != nil))
} }
// ShouldCheck returns a boolean indicating if the Monitor is ready to be // ShouldCheck returns a boolean indicating if the Monitor is ready to be
@ -43,9 +41,8 @@ func (monitor Monitor) ShouldCheck() bool {
return true return true
} }
sinceLastCheck := time.Since(monitor.lastCheck) sinceLastCheck := time.Now().Sub(monitor.lastCheck).Seconds()
return sinceLastCheck >= monitor.CheckInterval
return sinceLastCheck >= monitor.CheckInterval.Value()
} }
// Check will run the command configured by the Monitor and return a status // Check will run the command configured by the Monitor and return a status
@ -58,14 +55,11 @@ func (monitor *Monitor) Check() (bool, *AlertNotice) {
cmd = ShellCommand(monitor.Command.ShellCommand) cmd = ShellCommand(monitor.Command.ShellCommand)
} }
checkStartTime := time.Now()
output, err := cmd.CombinedOutput() output, err := cmd.CombinedOutput()
monitor.lastCheck = time.Now() monitor.lastCheck = time.Now()
monitor.lastOutput = string(output) monitor.lastOutput = string(output)
monitor.lastCheckDuration = monitor.lastCheck.Sub(checkStartTime)
var alertNotice *AlertNotice var alertNotice *AlertNotice
isSuccess := (err == nil) isSuccess := (err == nil)
if isSuccess { if isSuccess {
alertNotice = monitor.success() alertNotice = monitor.success()
@ -73,11 +67,17 @@ func (monitor *Monitor) Check() (bool, *AlertNotice) {
alertNotice = monitor.failure() alertNotice = monitor.failure()
} }
slog.Debugf("Command output: %s", monitor.lastOutput) if LogDebug {
slog.OnErrWarnf(err, "Command result: %v", err) log.Printf("DEBUG: Command output: %s", monitor.lastOutput)
}
if err != nil {
if LogDebug {
log.Printf("DEBUG: Command result: %v", err)
}
}
slog.Infof( log.Printf(
"%s success=%t, alert=%t", "INFO: %s success=%t, alert=%t",
monitor.Name, monitor.Name,
isSuccess, isSuccess,
alertNotice != nil, alertNotice != nil,
@ -86,22 +86,15 @@ func (monitor *Monitor) Check() (bool, *AlertNotice) {
return isSuccess, alertNotice return isSuccess, alertNotice
} }
// IsUp returns the status of the current monitor func (monitor Monitor) isUp() bool {
func (monitor Monitor) IsUp() bool {
return monitor.alertCount == 0 return monitor.alertCount == 0
} }
// LastCheckMilliseconds gives number of miliseconds the last check ran for
func (monitor Monitor) LastCheckMilliseconds() int64 {
return monitor.lastCheckDuration.Milliseconds()
}
func (monitor *Monitor) success() (notice *AlertNotice) { func (monitor *Monitor) success() (notice *AlertNotice) {
if !monitor.IsUp() { if !monitor.isUp() {
// Alert that we have recovered // Alert that we have recovered
notice = monitor.createAlertNotice(true) notice = monitor.createAlertNotice(true)
} }
monitor.failureCount = 0 monitor.failureCount = 0
monitor.alertCount = 0 monitor.alertCount = 0
monitor.lastSuccess = time.Now() monitor.lastSuccess = time.Now()
@ -113,14 +106,15 @@ func (monitor *Monitor) failure() (notice *AlertNotice) {
monitor.failureCount++ monitor.failureCount++
// If we haven't hit the minimum failures, we can exit // If we haven't hit the minimum failures, we can exit
if monitor.failureCount < monitor.getAlertAfter() { if monitor.failureCount < monitor.getAlertAfter() {
slog.Debugf( if LogDebug {
"%s failed but did not hit minimum failures. "+ log.Printf(
"DEBUG: %s failed but did not hit minimum failures. "+
"Count: %v alert after: %v", "Count: %v alert after: %v",
monitor.Name, monitor.Name,
monitor.failureCount, monitor.failureCount,
monitor.getAlertAfter(), monitor.getAlertAfter(),
) )
}
return return
} }
@ -128,20 +122,19 @@ func (monitor *Monitor) failure() (notice *AlertNotice) {
failureCount := (monitor.failureCount - monitor.getAlertAfter()) failureCount := (monitor.failureCount - monitor.getAlertAfter())
// Use alert cadence to determine if we should alert // Use alert cadence to determine if we should alert
switch { if monitor.AlertEvery > 0 {
case monitor.AlertEvery == nil, *monitor.AlertEvery == 0: // Handle integer number of failures before alerting
if failureCount%monitor.AlertEvery == 0 {
notice = monitor.createAlertNotice(false)
}
} else if monitor.AlertEvery == 0 {
// Handle alerting on first failure only // Handle alerting on first failure only
if failureCount == 0 { if failureCount == 0 {
notice = monitor.createAlertNotice(false) notice = monitor.createAlertNotice(false)
} }
case *monitor.AlertEvery > 0: } else {
// Handle integer number of failures before alerting
if failureCount%*monitor.AlertEvery == 0 {
notice = monitor.createAlertNotice(false)
}
default:
// Handle negative numbers indicating an exponential backoff // Handle negative numbers indicating an exponential backoff
if failureCount >= int16(math.Pow(2, float64(monitor.alertCount))-1) { //nolint:gomnd if failureCount >= int16(math.Pow(2, float64(monitor.alertCount))-1) {
notice = monitor.createAlertNotice(false) notice = monitor.createAlertNotice(false)
} }
} }
@ -151,7 +144,7 @@ func (monitor *Monitor) failure() (notice *AlertNotice) {
monitor.alertCount++ monitor.alertCount++
} }
return notice return
} }
func (monitor Monitor) getAlertAfter() int16 { func (monitor Monitor) getAlertAfter() int16 {
@ -160,17 +153,15 @@ func (monitor Monitor) getAlertAfter() int16 {
if monitor.AlertAfter == 0 { if monitor.AlertAfter == 0 {
return 1 return 1
} }
return monitor.AlertAfter return monitor.AlertAfter
} }
// GetAlertNames gives a list of alert names for a given monitor status // GetAlertNames gives a list of alert names for a given monitor status
func (monitor Monitor) GetAlertNames(up bool) []string { func (monitor Monitor) GetAlertNames(up bool) []string {
if up { if up {
return monitor.AlertUp return append(monitor.Alerts, monitor.AlertUp...)
} }
return append(monitor.Alerts, monitor.AlertDown...)
return monitor.AlertDown
} }
func (monitor Monitor) createAlertNotice(isUp bool) *AlertNotice { func (monitor Monitor) createAlertNotice(isUp bool) *AlertNotice {

75
monitor_test.go
View File

@ -18,17 +18,16 @@ func TestMonitorIsValid(t *testing.T) {
{Monitor{Command: CommandOrShell{Command: []string{"echo", "test"}}}, false, "No AlertDown"}, {Monitor{Command: CommandOrShell{Command: []string{"echo", "test"}}}, false, "No AlertDown"},
{Monitor{AlertDown: []string{"log"}}, false, "No commands"}, {Monitor{AlertDown: []string{"log"}}, false, "No commands"},
{Monitor{Command: CommandOrShell{Command: []string{"echo", "test"}}, AlertDown: []string{"log"}, AlertAfter: -1}, false, "Invalid alert threshold, -1"}, {Monitor{Command: CommandOrShell{Command: []string{"echo", "test"}}, AlertDown: []string{"log"}, AlertAfter: -1}, false, "Invalid alert threshold, -1"},
{Monitor{Command: CommandOrShell{Command: []string{"echo", "test"}}, Alerts: []string{"log"}}, true, "Using non-up/down specific alerts"},
} }
for _, c := range cases { for _, c := range cases {
log.Printf("Testing case %s", c.name) log.Printf("Testing case %s", c.name)
actual := c.monitor.IsValid() actual := c.monitor.IsValid()
if actual != c.expected { if actual != c.expected {
t.Errorf("IsValid(%v), expected=%t actual=%t", c.name, c.expected, actual) t.Errorf("IsValid(%v), expected=%t actual=%t", c.name, c.expected, actual)
log.Printf("Case failed: %s", c.name) log.Printf("Case failed: %s", c.name)
} }
log.Println("-----") log.Println("-----")
} }
} }
@ -45,9 +44,9 @@ func TestMonitorShouldCheck(t *testing.T) {
name string name string
}{ }{
{Monitor{}, true, "Empty"}, {Monitor{}, true, "Empty"},
{Monitor{lastCheck: timeNow, CheckInterval: SecondsOrDuration{time.Second * 15}}, false, "Just checked"}, {Monitor{lastCheck: timeNow, CheckInterval: 15}, false, "Just checked"},
{Monitor{lastCheck: timeTenSecAgo, CheckInterval: SecondsOrDuration{time.Second * 15}}, false, "-10s"}, {Monitor{lastCheck: timeTenSecAgo, CheckInterval: 15}, false, "-10s"},
{Monitor{lastCheck: timeTwentySecAgo, CheckInterval: SecondsOrDuration{time.Second * 15}}, true, "-20s"}, {Monitor{lastCheck: timeTwentySecAgo, CheckInterval: 15}, true, "-20s"},
} }
for _, c := range cases { for _, c := range cases {
@ -58,7 +57,7 @@ func TestMonitorShouldCheck(t *testing.T) {
} }
} }
// TestMonitorIsUp tests the Monitor.IsUp() // TestMonitorIsUp tests the Monitor.isUp()
func TestMonitorIsUp(t *testing.T) { func TestMonitorIsUp(t *testing.T) {
cases := []struct { cases := []struct {
monitor Monitor monitor Monitor
@ -73,13 +72,11 @@ func TestMonitorIsUp(t *testing.T) {
for _, c := range cases { for _, c := range cases {
log.Printf("Testing case %s", c.name) log.Printf("Testing case %s", c.name)
actual := c.monitor.isUp()
actual := c.monitor.IsUp()
if actual != c.expected { if actual != c.expected {
t.Errorf("IsUp(%v), expected=%t actual=%t", c.name, c.expected, actual) t.Errorf("isUp(%v), expected=%t actual=%t", c.name, c.expected, actual)
log.Printf("Case failed: %s", c.name) log.Printf("Case failed: %s", c.name)
} }
log.Println("-----") log.Println("-----")
} }
} }
@ -100,13 +97,11 @@ func TestMonitorGetAlertNames(t *testing.T) {
for _, c := range cases { for _, c := range cases {
log.Printf("Testing case %s", c.name) log.Printf("Testing case %s", c.name)
actual := c.monitor.GetAlertNames(c.up) actual := c.monitor.GetAlertNames(c.up)
if !EqualSliceString(actual, c.expected) { if !EqualSliceString(actual, c.expected) {
t.Errorf("GetAlertNames(%v), expected=%v actual=%v", c.name, c.expected, actual) t.Errorf("GetAlertNames(%v), expected=%v actual=%v", c.name, c.expected, actual)
log.Printf("Case failed: %s", c.name) log.Printf("Case failed: %s", c.name)
} }
log.Println("-----") log.Println("-----")
} }
} }
@ -125,15 +120,12 @@ func TestMonitorSuccess(t *testing.T) {
for _, c := range cases { for _, c := range cases {
log.Printf("Testing case %s", c.name) log.Printf("Testing case %s", c.name)
notice := c.monitor.success() notice := c.monitor.success()
hasNotice := (notice != nil) hasNotice := (notice != nil)
if hasNotice != c.expectNotice { if hasNotice != c.expectNotice {
t.Errorf("success(%v), expected=%t actual=%t", c.name, c.expectNotice, hasNotice) t.Errorf("success(%v), expected=%t actual=%t", c.name, c.expectNotice, hasNotice)
log.Printf("Case failed: %s", c.name) log.Printf("Case failed: %s", c.name)
} }
log.Println("-----") log.Println("-----")
} }
} }
@ -141,32 +133,27 @@ func TestMonitorSuccess(t *testing.T) {
// TestMonitorFailureAlertAfter tests that alerts will not trigger until // TestMonitorFailureAlertAfter tests that alerts will not trigger until
// hitting the threshold provided by AlertAfter // hitting the threshold provided by AlertAfter
func TestMonitorFailureAlertAfter(t *testing.T) { func TestMonitorFailureAlertAfter(t *testing.T) {
var alertEvery int16 = 1
cases := []struct { cases := []struct {
monitor Monitor monitor Monitor
expectNotice bool expectNotice bool
name string name string
}{ }{
{Monitor{AlertAfter: 1}, true, "Empty"}, // Defaults to true because and AlertEvery default to 0 {Monitor{AlertAfter: 1}, true, "Empty"}, // Defaults to true because and AlertEvery default to 0
{Monitor{failureCount: 0, AlertAfter: 1, AlertEvery: &alertEvery}, true, "Alert after 1: first failure"}, {Monitor{failureCount: 0, AlertAfter: 1, AlertEvery: 1}, true, "Alert after 1: first failure"},
{Monitor{failureCount: 1, AlertAfter: 1, AlertEvery: &alertEvery}, true, "Alert after 1: second failure"}, {Monitor{failureCount: 1, AlertAfter: 1, AlertEvery: 1}, true, "Alert after 1: second failure"},
{Monitor{failureCount: 0, AlertAfter: 20, AlertEvery: &alertEvery}, false, "Alert after 20: first failure"}, {Monitor{failureCount: 0, AlertAfter: 20, AlertEvery: 1}, false, "Alert after 20: first failure"},
{Monitor{failureCount: 19, AlertAfter: 20, AlertEvery: &alertEvery}, true, "Alert after 20: 20th failure"}, {Monitor{failureCount: 19, AlertAfter: 20, AlertEvery: 1}, true, "Alert after 20: 20th failure"},
{Monitor{failureCount: 20, AlertAfter: 20, AlertEvery: &alertEvery}, true, "Alert after 20: 21st failure"}, {Monitor{failureCount: 20, AlertAfter: 20, AlertEvery: 1}, true, "Alert after 20: 21st failure"},
} }
for _, c := range cases { for _, c := range cases {
log.Printf("Testing case %s", c.name) log.Printf("Testing case %s", c.name)
notice := c.monitor.failure() notice := c.monitor.failure()
hasNotice := (notice != nil) hasNotice := (notice != nil)
if hasNotice != c.expectNotice { if hasNotice != c.expectNotice {
t.Errorf("failure(%v), expected=%t actual=%t", c.name, c.expectNotice, hasNotice) t.Errorf("failure(%v), expected=%t actual=%t", c.name, c.expectNotice, hasNotice)
log.Printf("Case failed: %s", c.name) log.Printf("Case failed: %s", c.name)
} }
log.Println("-----") log.Println("-----")
} }
} }
@ -174,11 +161,6 @@ func TestMonitorFailureAlertAfter(t *testing.T) {
// TestMonitorFailureAlertEvery tests that alerts will trigger // TestMonitorFailureAlertEvery tests that alerts will trigger
// on the expected intervals // on the expected intervals
func TestMonitorFailureAlertEvery(t *testing.T) { func TestMonitorFailureAlertEvery(t *testing.T) {
var alertEvery0, alertEvery1, alertEvery2 int16
alertEvery0 = 0
alertEvery1 = 1
alertEvery2 = 2
cases := []struct { cases := []struct {
monitor Monitor monitor Monitor
expectNotice bool expectNotice bool
@ -193,20 +175,20 @@ func TestMonitorFailureAlertEvery(t *testing.T) {
For usabilty, this should be consistent. Consistent with what though? minitor-py? Or itself? Dun dun duuuunnnnn! For usabilty, this should be consistent. Consistent with what though? minitor-py? Or itself? Dun dun duuuunnnnn!
*/ */
{Monitor{AlertAfter: 1}, true, "Empty"}, // Defaults to true because AlertAfter and AlertEvery default to nil {Monitor{AlertAfter: 1}, true, "Empty"}, // Defaults to true because AlertAfter and AlertEvery default to 0
// Alert first time only, after 1 // Alert first time only, after 1
{Monitor{failureCount: 0, AlertAfter: 1, AlertEvery: &alertEvery0}, true, "Alert first time only after 1: first failure"}, {Monitor{failureCount: 0, AlertAfter: 1, AlertEvery: 0}, true, "Alert first time only after 1: first failure"},
{Monitor{failureCount: 1, AlertAfter: 1, AlertEvery: &alertEvery0}, false, "Alert first time only after 1: second failure"}, {Monitor{failureCount: 1, AlertAfter: 1, AlertEvery: 0}, false, "Alert first time only after 1: second failure"},
{Monitor{failureCount: 2, AlertAfter: 1, AlertEvery: &alertEvery0}, false, "Alert first time only after 1: third failure"}, {Monitor{failureCount: 2, AlertAfter: 1, AlertEvery: 0}, false, "Alert first time only after 1: third failure"},
// Alert every time, after 1 // Alert every time, after 1
{Monitor{failureCount: 0, AlertAfter: 1, AlertEvery: &alertEvery1}, true, "Alert every time after 1: first failure"}, {Monitor{failureCount: 0, AlertAfter: 1, AlertEvery: 1}, true, "Alert every time after 1: first failure"},
{Monitor{failureCount: 1, AlertAfter: 1, AlertEvery: &alertEvery1}, true, "Alert every time after 1: second failure"}, {Monitor{failureCount: 1, AlertAfter: 1, AlertEvery: 1}, true, "Alert every time after 1: second failure"},
{Monitor{failureCount: 2, AlertAfter: 1, AlertEvery: &alertEvery1}, true, "Alert every time after 1: third failure"}, {Monitor{failureCount: 1, AlertAfter: 1, AlertEvery: 1}, true, "Alert every time after 1: third failure"},
// Alert every other time, after 1 // Alert every other time, after 1
{Monitor{failureCount: 0, AlertAfter: 1, AlertEvery: &alertEvery2}, true, "Alert every other time after 1: first failure"}, {Monitor{failureCount: 0, AlertAfter: 1, AlertEvery: 2}, true, "Alert every other time after 1: first failure"},
{Monitor{failureCount: 1, AlertAfter: 1, AlertEvery: &alertEvery2}, false, "Alert every other time after 1: second failure"}, {Monitor{failureCount: 1, AlertAfter: 1, AlertEvery: 2}, false, "Alert every other time after 1: second failure"},
{Monitor{failureCount: 2, AlertAfter: 1, AlertEvery: &alertEvery2}, true, "Alert every other time after 1: third failure"}, {Monitor{failureCount: 2, AlertAfter: 1, AlertEvery: 2}, true, "Alert every other time after 1: third failure"},
{Monitor{failureCount: 3, AlertAfter: 1, AlertEvery: &alertEvery2}, false, "Alert every other time after 1: fourth failure"}, {Monitor{failureCount: 3, AlertAfter: 1, AlertEvery: 2}, false, "Alert every other time after 1: fourth failure"},
} }
for _, c := range cases { for _, c := range cases {
@ -214,12 +196,10 @@ func TestMonitorFailureAlertEvery(t *testing.T) {
notice := c.monitor.failure() notice := c.monitor.failure()
hasNotice := (notice != nil) hasNotice := (notice != nil)
if hasNotice != c.expectNotice { if hasNotice != c.expectNotice {
t.Errorf("failure(%v), expected=%t actual=%t", c.name, c.expectNotice, hasNotice) t.Errorf("failure(%v), expected=%t actual=%t", c.name, c.expectNotice, hasNotice)
log.Printf("Case failed: %s", c.name) log.Printf("Case failed: %s", c.name)
} }
log.Println("-----") log.Println("-----")
} }
} }
@ -227,8 +207,6 @@ func TestMonitorFailureAlertEvery(t *testing.T) {
// TestMonitorFailureExponential tests that alerts will trigger // TestMonitorFailureExponential tests that alerts will trigger
// with an exponential backoff after repeated failures // with an exponential backoff after repeated failures
func TestMonitorFailureExponential(t *testing.T) { func TestMonitorFailureExponential(t *testing.T) {
var alertEveryExp int16 = -1
cases := []struct { cases := []struct {
expectNotice bool expectNotice bool
name string name string
@ -245,19 +223,16 @@ func TestMonitorFailureExponential(t *testing.T) {
// Unlike previous tests, this one requires a static Monitor with repeated // Unlike previous tests, this one requires a static Monitor with repeated
// calls to the failure method // calls to the failure method
monitor := Monitor{failureCount: 0, AlertAfter: 1, AlertEvery: &alertEveryExp} monitor := Monitor{failureCount: 0, AlertAfter: 1, AlertEvery: -1}
for _, c := range cases { for _, c := range cases {
log.Printf("Testing case %s", c.name) log.Printf("Testing case %s", c.name)
notice := monitor.failure() notice := monitor.failure()
hasNotice := (notice != nil) hasNotice := (notice != nil)
if hasNotice != c.expectNotice { if hasNotice != c.expectNotice {
t.Errorf("failure(%v), expected=%t actual=%t", c.name, c.expectNotice, hasNotice) t.Errorf("failure(%v), expected=%t actual=%t", c.name, c.expectNotice, hasNotice)
log.Printf("Case failed: %s", c.name) log.Printf("Case failed: %s", c.name)
} }
log.Println("-----") log.Println("-----")
} }
} }
@ -269,7 +244,6 @@ func TestMonitorCheck(t *testing.T) {
hasNotice bool hasNotice bool
lastOutput string lastOutput string
} }
cases := []struct { cases := []struct {
monitor Monitor monitor Monitor
expect expected expect expected
@ -317,7 +291,6 @@ func TestMonitorCheck(t *testing.T) {
t.Errorf("Check(%v) (output), expected=%v actual=%v", c.name, c.expect.lastOutput, lastOutput) t.Errorf("Check(%v) (output), expected=%v actual=%v", c.name, c.expect.lastOutput, lastOutput)
log.Printf("Case failed: %s", c.name) log.Printf("Case failed: %s", c.name)
} }
log.Println("-----") log.Println("-----")
} }
} }

7
sample-config.yml
View File

@ -3,14 +3,14 @@ check_interval: 5
monitors: monitors:
- name: Fake Website - name: Fake Website
command: ["curl", "-s", "-o", "/dev/null", "https://minitor.mon"] command: ['curl', '-s', '-o', '/dev/null', 'https://minitor.mon']
alert_down: [log_down, mailgun_down, sms_down] alert_down: [log_down, mailgun_down, sms_down]
alert_up: [log_up, email_up] alert_up: [log_up, email_up]
check_interval: 10 # Must be at minimum the global `check_interval` check_interval: 10 # Must be at minimum the global `check_interval`
alert_after: 3 alert_after: 3
alert_every: -1 # Defaults to -1 for exponential backoff. 0 to disable repeating alert_every: -1 # Defaults to -1 for exponential backoff. 0 to disable repeating
- name: Real Website - name: Real Website
command: ["curl", "-s", "-o", "/dev/null", "https://google.com"] command: ['curl', '-s', '-o', '/dev/null', 'https://google.com']
alert_down: [log_down, mailgun_down, sms_down] alert_down: [log_down, mailgun_down, sms_down]
alert_up: [log_up, email_up] alert_up: [log_up, email_up]
check_interval: 5 check_interval: 5
@ -23,8 +23,7 @@ alerts:
log_up: log_up:
command: ["echo", "Minitor recovery for {{.MonitorName}}"] command: ["echo", "Minitor recovery for {{.MonitorName}}"]
email_up: email_up:
command: command: [sendmail, "me@minitor.mon", "Recovered: {monitor_name}", "We're back!"]
[sendmail, "me@minitor.mon", "Recovered: {monitor_name}", "We're back!"]
mailgun_down: mailgun_down:
command: > command: >
curl -s -X POST curl -s -X POST

6
scripts/curl_ok.sh
View File

@ -1,6 +0,0 @@
#! /bin/sh
# Used for a basic HTTP health check
# Avoids output from non-errors and will fail if the HTTP response is unsuccessful
curl --silent --show-error --fail -o /dev/null "$@"

18
scripts/docker_check.sh
View File

@ -11,7 +11,6 @@ set -e
# To override, export DOCKER_HOST to a new hostname # To override, export DOCKER_HOST to a new hostname
DOCKER_HOST="${DOCKER_HOST:=socket}" DOCKER_HOST="${DOCKER_HOST:=socket}"
container_name="$1" container_name="$1"
num_log_lines="$2"
# Curls Docker either using a socket or URL # Curls Docker either using a socket or URL
function curl_docker { function curl_docker {
@ -32,32 +31,21 @@ function get_container_id {
# Returns container JSON # Returns container JSON
function inspect_container { function inspect_container {
local container_id="$1" local container_id=$1
curl_docker "containers/$container_id/json" curl_docker "containers/$container_id/json"
} }
# Gets some lines from docker log
function get_logs {
container_id="$1"
num_lines="$2"
curl_docker "containers/$container_id/logs?stdout=1&stderr=1" | tail -n "$num_lines"
}
if [ -z "$container_name" ]; then if [ -z "$container_name" ]; then
echo "Usage: $0 container_name [num_log_lines]" echo "Usage: $0 container_name"
echo "Will exit with the last status code of continer with provided name" echo "Will exit with the last status code of continer with provided name"
exit 1 exit 1
fi fi
container_id=$(get_container_id "$container_name") container_id=$(get_container_id $container_name)
if [ -z "$container_id" ]; then if [ -z "$container_id" ]; then
echo "ERROR: Could not find container with name: $container_name" echo "ERROR: Could not find container with name: $container_name"
exit 1 exit 1
fi fi
exit_code=$(inspect_container "$container_id" | jq -r .State.ExitCode) exit_code=$(inspect_container "$container_id" | jq -r .State.ExitCode)
if [ -n "$num_log_lines" ]; then
get_logs "$container_id" "$num_log_lines"
fi
exit "$exit_code" exit "$exit_code"

14
scripts/docker_healthcheck.sh
View File

@ -11,7 +11,6 @@ set -e
# To override, export DOCKER_HOST to a new hostname # To override, export DOCKER_HOST to a new hostname
DOCKER_HOST="${DOCKER_HOST:=socket}" DOCKER_HOST="${DOCKER_HOST:=socket}"
container_name="$1" container_name="$1"
num_log_lines="$2"
# Curls Docker either using a socket or URL # Curls Docker either using a socket or URL
function curl_docker { function curl_docker {
@ -36,15 +35,8 @@ function inspect_container {
curl_docker "containers/$container_id/json" curl_docker "containers/$container_id/json"
} }
# Gets some lines from docker log
function get_logs {
container_id="$1"
num_lines="$2"
curl_docker "containers/$container_id/logs?stdout=1&stderr=1" | tail -n "$num_lines"
}
if [ -z "$container_name" ]; then if [ -z "$container_name" ]; then
echo "Usage: $0 container_name [num_log_lines]" echo "Usage: $0 container_name"
echo "Will return results of healthcheck for continer with provided name" echo "Will return results of healthcheck for continer with provided name"
exit 1 exit 1
fi fi
@ -56,10 +48,6 @@ if [ -z "$container_id" ]; then
fi fi
health=$(inspect_container "$container_id" | jq -r '.State.Health.Status') health=$(inspect_container "$container_id" | jq -r '.State.Health.Status')
if [ -n "$num_log_lines" ]; then
get_logs "$container_id" "$num_log_lines"
fi
case "$health" in case "$health" in
null) null)
echo "No healthcheck results" echo "No healthcheck results"

12
test/valid-config-default-values.yml
View File

@ -1,12 +0,0 @@
---
check_interval: 1
default_alert_down: ["log_command"]
default_alert_after: 1
monitors:
- name: Command
command: ["echo", "$PATH"]
alerts:
log_command:
command: ["echo", "regular", '"command!!!"', "{{.MonitorName}}"]

10
test/valid-config.yml
View File

@ -3,23 +3,21 @@ check_interval: 1
monitors: monitors:
- name: Command - name: Command
command: ["echo", "$PATH"] command: ['echo', '$PATH']
alert_down: ["log_command", "log_shell"] alert_down: ['log_command', 'log_shell']
alert_every: 0 alert_every: 0
check_interval: 10s
- name: Shell - name: Shell
command: > command: >
echo 'Some string with stuff'; echo 'Some string with stuff';
echo 'another line'; echo 'another line';
echo $PATH; echo $PATH;
exit 1 exit 1
alert_down: ["log_command", "log_shell"] alert_down: ['log_command', 'log_shell']
alert_after: 5 alert_after: 5
alert_every: 0 alert_every: 0
check_interval: 1m
alerts: alerts:
log_command: log_command:
command: ["echo", "regular", '"command!!!"', "{{.MonitorName}}"] command: ['echo', 'regular', '"command!!!"', "{{.MonitorName}}"]
log_shell: log_shell:
command: echo "Failure on {{.MonitorName}} User is $USER" command: echo "Failure on {{.MonitorName}} User is $USER"

4
util.go
View File

@ -8,7 +8,7 @@ import (
// ShellCommand takes a string and executes it as a command using `sh` // ShellCommand takes a string and executes it as a command using `sh`
func ShellCommand(command string) *exec.Cmd { func ShellCommand(command string) *exec.Cmd {
shellCommand := []string{"sh", "-c", strings.TrimSpace(command)} shellCommand := []string{"sh", "-c", strings.TrimSpace(command)}
//log.Printf("Shell command: %v", shellCommand)
return exec.Command(shellCommand[0], shellCommand[1:]...) return exec.Command(shellCommand[0], shellCommand[1:]...)
} }
@ -17,12 +17,10 @@ func EqualSliceString(a, b []string) bool {
if len(a) != len(b) { if len(a) != len(b) {
return false return false
} }
for i, val := range a { for i, val := range a {
if val != b[i] { if val != b[i] {
return false return false
} }
} }
return true return true
} }