Update drone static builds

.drone.yml

@@ -1,25 +1,11 @@
----
 kind: pipeline
 name: test
 
 steps:
-  - name: test
+  - name: build
-    image: golang:1.22
+    image: golang:1.12
     commands:
-      - make test
+      - make build
-
-  - name: check
-    image: iamthefij/drone-pre-commit:personal
-    environment:
-      SKIP: docker-compose-check
-
-  # - name: itest
-  #   image: docker/compose:alpine-1.26.2
-  #   environment:
-  #     VERSION: ${DRONE_TAG:-${DRONE_COMMIT}}
-  #   commands:
-  #     - apk add make bash
-  #     - make itest
 
 ---
 kind: pipeline
@@ -38,11 +24,9 @@ trigger:
 
 steps:
   - name: build
-    image: golang:1.22
+    image: golang:1.12
-    environment:
-      VERSION: ${DRONE_TAG:-${DRONE_COMMIT}}
     commands:
-      - make build-linux-static
+      - make build-all-static
 
   - name: push image - arm
     image: plugins/docker
@@ -56,7 +40,7 @@ steps:
         from_secret: docker_password
       build_args:
         - ARCH=arm
-        - REPO=arm32v7
+        - REPO=arm32v6
 
   - name: push image - arm64
     image: plugins/docker
@@ -69,8 +53,8 @@ steps:
       password:
         from_secret: docker_password
       build_args:
-        - ARCH=arm64
+        - ARCH=arm
-        - REPO=arm64v8
+        - REPO=arm32v6
 
   - name: push image - amd64
     image: plugins/docker
@@ -93,28 +77,3 @@ steps:
         from_secret: docker_username
       password:
         from_secret: docker_password
-
----
-kind: pipeline
-name: notify
-
-depends_on:
-  - test
-  - publish
-
-trigger:
-  status:
-    - failure
-
-steps:
-
-  - name: notify
-    image: drillster/drone-email
-    settings:
-      host:
-        from_secret: SMTP_HOST  # pragma: whitelist secret
-      username:
-        from_secret: SMTP_USER  # pragma: whitelist secret
-      password:
-        from_secret: SMTP_PASS  # pragma: whitelist secret
-      from: drone@iamthefij.com

.gitignore

@@ -25,11 +25,7 @@ _testmain.go
 *.prof
 
 # Output
-coverage.out
 dockron
-dockron-*
+dockron-linux-*
 # deps
 vendor/
-
-# Test output
-itest/*_result.txt

.golangci.yml

@@ -1,36 +0,0 @@
----
-linters:
-  enable:
-    - errname
-    - errorlint
-    - exhaustive
-    - gofumpt
-    - goimports
-    - goprintffuncname
-    - misspell
-    - gomnd
-    - 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

.pre-commit-config.yaml

@@ -1,22 +0,0 @@
----
-repos:
-  - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v4.6.0
-    hooks:
-      - id: check-added-large-files
-      - id: trailing-whitespace
-      - id: end-of-file-fixer
-      - id: check-merge-conflict
-  - repo: https://github.com/golangci/golangci-lint
-    rev: v1.52.2
-    hooks:
-      - id: golangci-lint
-        args: ["--timeout=5m"]
-  - repo: https://github.com/IamTheFij/docker-pre-commit
-    rev: v3.0.1
-    hooks:
-      - id: docker-compose-check
-  - repo: https://github.com/hadolint/hadolint
-    rev: v2.12.0
-    hooks:
-      - id: hadolint

Dockerfile

@@ -1,6 +1,8 @@
-FROM scratch
+ARG REPO=library
+FROM ${REPO}/busybox:latest
+WORKDIR /root/
 
 ARG ARCH=amd64
-COPY ./dockron-linux-${ARCH} /dockron
+COPY ./dockron-linux-${ARCH} ./dockron
 
-ENTRYPOINT [ "/dockron" ]
+CMD [ "./dockron" ]

Dockerfile.multi-stage

@@ -1,22 +1,19 @@
 ARG REPO=library
-FROM golang:1.22-alpine AS builder
+FROM ${REPO}/golang:1.12-alpine AS builder
 
-# hadolint ignore=DL3018
+RUN apk add --no-cache git
-RUN apk add --no-cache git && \
+
-    mkdir /app
+RUN mkdir /app
 WORKDIR /app
 
 COPY ./go.mod ./go.sum /app/
 RUN go mod download
 
 COPY ./main.go /app/
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=${ARCH} go build -a -installsuffix nocgo -o dockron .
 
-ARG ARCH=amd64
+FROM ${REPO}/busybox:latest
-ARG VERSION=dev
+WORKDIR /root/
-ENV CGO_ENABLED=0 GOOS=linux GOARCH=${ARCH}
+COPY --from=builder /app/dockron .
-RUN go build -ldflags "-X main.version=${VERSION}" -a -installsuffix nocgo -o dockron .
 
-FROM scratch
+CMD [ "./dockron" ]
-COPY --from=builder /app/dockron /
-
-ENTRYPOINT [ "/dockron" ]

Gopkg.lock

@@ -0,0 +1,63 @@
+# This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'.
+
+
+[[projects]]
+  name = "github.com/Microsoft/go-winio"
+  packages = ["."]
+  revision = "a6d595ae73cf27a1b8fc32930668708f45ce1c85"
+  version = "v0.4.9"
+
+[[projects]]
+  name = "github.com/docker/distribution"
+  packages = ["digest","reference"]
+  revision = "48294d928ced5dd9b378f7fd7c6f5da3ff3f2c89"
+  version = "v2.6.2"
+
+[[projects]]
+  name = "github.com/docker/docker"
+  packages = ["api/types","api/types/blkiodev","api/types/container","api/types/events","api/types/filters","api/types/mount","api/types/network","api/types/reference","api/types/registry","api/types/strslice","api/types/swarm","api/types/time","api/types/versions","api/types/volume","client","pkg/tlsconfig"]
+  revision = "092cba3727bb9b4a2f0e922cd6c0f93ea270e363"
+  version = "v1.13.1"
+
+[[projects]]
+  name = "github.com/docker/go-connections"
+  packages = ["nat","sockets","tlsconfig"]
+  revision = "7395e3f8aa162843a74ed6d48e79627d9792ac55"
+  version = "v0.4.0"
+
+[[projects]]
+  name = "github.com/docker/go-units"
+  packages = ["."]
+  revision = "47565b4f722fb6ceae66b95f853feed578a4a51c"
+  version = "v0.3.3"
+
+[[projects]]
+  name = "github.com/pkg/errors"
+  packages = ["."]
+  revision = "645ef00459ed84a119197bfb8d8205042c6df63d"
+  version = "v0.8.0"
+
+[[projects]]
+  name = "github.com/robfig/cron"
+  packages = ["."]
+  revision = "b41be1df696709bb6395fe435af20370037c0b4c"
+  version = "v1.1"
+
+[[projects]]
+  branch = "master"
+  name = "golang.org/x/net"
+  packages = ["context","context/ctxhttp","internal/socks","proxy"]
+  revision = "f4c29de78a2a91c00474a2e689954305c350adf9"
+
+[[projects]]
+  branch = "master"
+  name = "golang.org/x/sys"
+  packages = ["windows"]
+  revision = "0ffbfd41fbef8ffcf9b62b0b0aa3a5873ed7a4fe"
+
+[solve-meta]
+  analyzer-name = "dep"
+  analyzer-version = 1
+  inputs-digest = "dd521cf26a7594f53c78967b3d38f8e0de25745c662c03f6e73effaf2b59347d"
+  solver-name = "gps-cdcl"
+  solver-version = 1

Gopkg.toml

@@ -0,0 +1,33 @@
+# Gopkg.toml example
+#
+# Refer to https://github.com/golang/dep/blob/master/docs/Gopkg.toml.md
+# for detailed Gopkg.toml documentation.
+#
+# required = ["github.com/user/thing/cmd/thing"]
+# ignored = ["github.com/user/project/pkgX", "bitbucket.org/user/project/pkgA/pkgY"]
+#
+# [[constraint]]
+#   name = "github.com/user/project"
+#   version = "1.0.0"
+#
+# [[constraint]]
+#   name = "github.com/user/project2"
+#   branch = "dev"
+#   source = "github.com/myfork/project2"
+#
+# [[override]]
+#  name = "github.com/x/y"
+#  version = "2.4.0"
+
+
+[[constraint]]
+  name = "github.com/docker/docker"
+  version = "1.13.1"
+
+[[constraint]]
+  name = "github.com/robfig/cron"
+  version = "1.1.0"
+
+[[constraint]]
+  branch = "master"
+  name = "golang.org/x/net"

Makefile

@@ -1,87 +1,42 @@
-OUTPUT ?= dockron
+DOCKER_TAG ?= dockron-dev-${USER}
-DOCKER_TAG ?= $(OUTPUT)-dev-$(USER)
-GIT_TAG_NAME := $(shell git tag -l --contains HEAD)
-GIT_SHA := $(shell git rev-parse HEAD)
-VERSION ?= $(if $(GIT_TAG_NAME),$(GIT_TAG_NAME),$(GIT_SHA))
-
-GOFILES = *.go go.mod go.sum
 
 .PHONY: default
 default: build
 
-.PHONY: all
-all: check test itest
-
 # Downloads dependencies into vendor directory
-vendor: $(GOFILES)
+vendor:
 	go mod vendor
 
 # Runs the application, useful while developing
 .PHONY: run
 run:
-	go run . -watch 10s -debug
+	go run *.go
-
-.PHONY: test
-test:
-	go test -coverprofile=coverage.out
-	go tool cover -func=coverage.out
-	@go tool cover -func=coverage.out | awk -v target=75.0% \
-		'/^total:/ { print "Total coverage: " $$3 " Minimum coverage: " target; if ($$3+0.0 >= target+0.0) print "ok"; else { print "fail"; exit 1; } }'
-
-.PHONY: itest
-itest:
-	./itest/itest.sh
-
-# Installs pre-commit hooks
-.PHONY: install-hooks
-install-hooks:
-	pre-commit install --install-hooks
-
-# Runs pre-commit checks on files
-.PHONY: check
-check:
-	pre-commit run --all-files
 
 # Output target
-$(OUTPUT): $(GOFILES)
+dockron:
-	@echo Version: $(VERSION)
+	go build -o dockron
-	go build -ldflags '-X "main.version=$(VERSION)"' -o $(OUTPUT)
 
 # Alias for building
 .PHONY: build
-build: $(OUTPUT)
+build: dockron
 
-$(OUTPUT)-darwin-amd64: $(GOFILES)
+dockron-linux-amd64:
-	GOOS=darwin GOARCH=amd64 CGO_ENABLED=0 \
+	GOARCH=amd64 CGO_ENABLED=0 GOOS=linux go build -a -installsuffix nocgo -o dockron-linux-amd64
-		   go build -ldflags '-X "main.version=$(VERSION)"' -a -installsuffix nocgo \
-		   -o $(OUTPUT)-darwin-amd64
 
-$(OUTPUT)-linux-amd64: $(GOFILES)
+dockron-linux-arm:
-	GOOS=linux GOARCH=amd64 CGO_ENABLED=0 \
+	GOARCH=arm CGO_ENABLED=0 GOOS=linux go build -a -installsuffix nocgo -o dockron-linux-arm
-		   go build -ldflags '-X "main.version=$(VERSION)"' -a -installsuffix nocgo \
-		   -o $(OUTPUT)-linux-amd64
 
-$(OUTPUT)-linux-arm: $(GOFILES)
+dockron-linux-arm64:
-	GOOS=linux GOARCH=arm CGO_ENABLED=0 \
+	GOARCH=arm64 CGO_ENABLED=0 GOOS=linux go build -a -installsuffix nocgo -o dockron-linux-arm64
-		   go build -ldflags '-X "main.version=$(VERSION)"' -a -installsuffix nocgo \
-		   -o $(OUTPUT)-linux-arm
-
-$(OUTPUT)-linux-arm64: $(GOFILES)
-	GOOS=linux GOARCH=arm64 CGO_ENABLED=0 \
-		   go build -ldflags '-X "main.version=$(VERSION)"' -a -installsuffix nocgo \
-		   -o $(OUTPUT)-linux-arm64
-
-.PHONY: build-linux-static
-build-linux-static: $(OUTPUT)-linux-amd64 $(OUTPUT)-linux-arm $(OUTPUT)-linux-arm64
 
 .PHONY: build-all-static
-build-all-static: $(OUTPUT)-darwin-amd64 build-linux-static
+build-all-static: dockron-linux-amd64 dockron-linux-arm dockron-linux-arm64
 
 # Cleans all build artifacts
 .PHONY: clean
 clean:
-	rm -f $(OUTPUT)
+	rm -f dockron
-	rm -f $(OUTPUT)-linux-*
+	rm -f dockron-linux-*
 
 # Cleans vendor directory
 .PHONY: clean-vendor
@@ -89,53 +44,27 @@ clean-vendor:
 	rm -fr ./vendor
 
 .PHONY: docker-build
-docker-build: $(OUTPUT)-linux-amd64
+docker-build:
-	docker build . -t $(DOCKER_TAG)-linux-amd64
+	docker build . -t ${DOCKER_TAG}-linux-amd64
 
 # Cross build for arm architechtures
-.PHONY: docker-build-arm
+.PHONY: docker-cross-build-arm
-docker-build-arm: $(OUTPUT)-linux-arm
+docker-cross-build-arm:
-	docker build --build-arg REPO=arm32v7 --build-arg ARCH=arm . -t $(DOCKER_TAG)-linux-arm
+	docker build --build-arg REPO=arm32v6 --build-arg ARCH=arm . -t ${DOCKER_TAG}-linux-arm
 
-.PHONY: docker-build-arm
+.PHONY: docker-cross-build-arm
-docker-build-arm64: $(OUTPUT)-linux-arm64
+docker-cross-build-arm64:
-	docker build --build-arg REPO=arm64v8 --build-arg ARCH=arm64 . -t $(DOCKER_TAG)-linux-arm64
+	docker build --build-arg REPO=arm64v8 --build-arg ARCH=arm64 . -t ${DOCKER_TAG}-linux-arm64
 
 .PHONY: docker-run
 docker-run: docker-build
 	docker run --rm -v /var/run/docker.sock:/var/run/docker.sock --name $(DOCKER_TAG)-run $(DOCKER_TAG)-linux-amd64
 
 # Cross run on host architechture
-.PHONY: docker-run-arm
+.PHONY: docker-cross-run-arm
-docker-run-arm: docker-build-arm
+docker-cross-run-arm: docker-cross-build-arm
-	docker run --rm -v /var/run/docker.sock:/var/run/docker.sock --name $(DOCKER_TAG)-run $(DOCKER_TAG)-linux-arm
+	docker run --rm -v /var/run/docker.sock:/var/run/docker.sock --name $(DOCKER_TAG)-run ${DOCKER_TAG}-linux-arm
 
-.PHONY: docker-run-arm64
+.PHONY: docker-cross-run-arm64
-docker-run-arm64: docker-build-arm64
+docker-cross-run-arm64: docker-cross-build-arm64
-	docker run --rm -v /var/run/docker.sock:/var/run/docker.sock --name $(DOCKER_TAG)-run $(DOCKER_TAG)-linux-arm64
+	docker run --rm -v /var/run/docker.sock:/var/run/docker.sock --name $(DOCKER_TAG)-run ${DOCKER_TAG}-linux-arm64
-
-# Multi stage builds
-.PHONY: docker-staged-build
-docker-staged-build:
-	docker build --build-arg VERSION=$(VERSION) \
-		-t $(DOCKER_TAG)-linux-amd64 \
-		-f Dockerfile.multi-stage .
-
-# Cross build for arm architechtures
-.PHONY: docker-staged-build-arm
-docker-staged-build-arm:
-	docker build --build-arg VERSION=$(VERSION) \
-		--build-arg REPO=arm32v7 --build-arg ARCH=arm -t $(DOCKER_TAG)-linux-arm \
-		-f Dockerfile.multi-stage .
-
-.PHONY: docker-staged-build-arm
-docker-staged-build-arm64:
-	docker build --build-arg VERSION=$(VERSION) \
-		--build-arg REPO=arm64v8 --build-arg ARCH=arm64 -t $(DOCKER_TAG)-linux-arm64 \
-		-f Dockerfile.multi-stage .
-
-.PHONY: docker-example
-docker-example:
-	# Uses multistage
-	docker-compose build
-	docker-compose up

README.md

@@ -16,42 +16,14 @@ It will then run in the foreground, periodically checking Docker for containers
 
 By default, Dockron will periodically poll Docker for new containers or schedule changes every minute. You can specify an interval by using the `-watch` flag.
 
-### Running with Docker
-
-Dockron is also available as a Docker image. The multi-arch repo can be found at [IamTheFij/dockron](https://hub.docker.com/r/iamthefij/dockron)
-
-From either an `amd64`, `arm`, or `arm64` machine, you can run Dockron using:
-
-    docker run -v /var/run/docker.sock:/var/run/docker.sock:ro iamthefij/dockron -watch
-
-### Getting a Docker API Version error?
-
-You might see something like the following error when Dockron connects to the Docker API
-
-```
-Error response from daemon: client version 1.47 is too new. Maximum supported API version is 1.45
-```
-
-This is because the API client library is newer than the version of the Docker API on your host. You can tell the Dockron API Client to use a compatible version by specifying `DOCKER_API_VERSION=1.45`, where the version you specify matches the API version shown when you run `docker version`. If you are running Dockron in Docker, make sure you add this to your compose environment or otherwise pass it to the container.
-
 ### Scheduling a container
 
 First, be sure your container is something that is not long running and will actually exit when complete. This is for batch runs and not keeping a service running. Docker should be able to do that on it's own with a restart policy.
 
-Create your container and add a label in the form `'dockron.schedule=* * * * *'`, where the value is a valid cron expression (See the section [Cron Expression Formatting](#cron-expression-formatting)).
+Create your container and add a label in the form `dockron.schedule="* * * * *"`, where the value is a valid cron expression (See the section [Cron Expression Formatting](#cron-expression-formatting)).
 
 Dockron will now start that container peridically on the schedule.
 
-If you have a long running container that you'd like to schedule an exec command inside of, you can do so with labels as well. Add your job in the form `dockron.<job>.schedule=* * * * *` and `dockeron.<job>.command=echo hello`. Both labels are required to create an exec job.
-
-Eg.
-
-    labels:
-        - "dockron.dates.schedule=* * * * *"
-        - "dockron.dates.command=date"
-
-_Note: Exec jobs will log their output to Dockron. There is also currently no way to health check these._
-
 ### Cron Expression Formatting
 
 For more information on the cron expression parsing, see the docs for [robfig/cron](https://godoc.org/github.com/robfig/cron).
@@ -69,13 +41,3 @@ I intend to keep it simple as well. It will likely never:
 * Handle job dependencies
 
 Either use a separate tool in conjunction with Dockron, or use a more robust scheduler like Tron, or Chronos.
-
-## Building
-
-If you have go on your machine, you can simply use `make build` or `make run` to build and test Dockron. If you don't have go but you do have Docker, you can still build docker images using the provide multi-stage Dockerfile! You can kick that off with `make docker-staged-build`
-
-There is also an example `docker-compose.yml` that will use the multi-stage build to ensure an easy sample. This can be run with `make docker-example`.
-
-## Tests
-
-There are now some basic tests as well as linting and integration tests. You can run all of these by executing `make all`.

docker-compose.yml

@@ -1,26 +0,0 @@
----
-version: '3'
-
-services:
-  dockron:
-    build:
-      context: .
-      dockerfile: ./Dockerfile.multi-stage
-    command: ["-watch", "10s", "-debug"]
-    volumes:
-      - /var/run/docker.sock:/var/run/docker.sock:ro
-
-  start_echoer:
-    image: busybox:latest
-    command: ["date"]
-    labels:
-      # Execute every minute
-      - 'dockron.schedule=* * * * *'
-
-  exec_echoer:
-    image: busybox:latest
-    command: sh -c "date > /out && tail -f /out"
-    labels:
-      # Execute every minute
-      - 'dockron.date.schedule=* * * * *'
-      - 'dockron.date.command=date >> /out'

go.mod

@@ -1,39 +1,15 @@
 module github.com/iamthefij/dockron
 
-go 1.22
+go 1.12
-
-toolchain go1.22.7
 
 require (
-	git.iamthefij.com/iamthefij/slog v1.3.0
+	github.com/Microsoft/go-winio v0.4.9 // indirect
-	github.com/docker/docker v27.3.1+incompatible
+	github.com/docker/distribution v2.6.2+incompatible // indirect
-	github.com/robfig/cron/v3 v3.0.1
+	github.com/docker/docker v1.13.1
-	golang.org/x/net v0.29.0
+	github.com/docker/go-connections v0.4.0 // indirect
-)
+	github.com/docker/go-units v0.3.3 // indirect
-
+	github.com/pkg/errors v0.8.0 // indirect
-require (
+	github.com/robfig/cron v1.1.0
-	github.com/Microsoft/go-winio v0.4.14 // indirect
+	golang.org/x/net v0.0.0-20180801234040-f4c29de78a2a
-	github.com/containerd/log v0.1.0 // indirect
+	golang.org/x/sys v0.0.0-20180802203216-0ffbfd41fbef // indirect
-	github.com/distribution/reference v0.6.0 // indirect
-	github.com/docker/go-connections v0.5.0 // indirect
-	github.com/docker/go-units v0.5.0 // indirect
-	github.com/felixge/httpsnoop v1.0.4 // indirect
-	github.com/go-logr/logr v1.4.2 // indirect
-	github.com/go-logr/stdr v1.2.2 // indirect
-	github.com/gogo/protobuf v1.3.2 // indirect
-	github.com/moby/docker-image-spec v1.3.1 // indirect
-	github.com/moby/term v0.5.0 // indirect
-	github.com/morikuni/aec v1.0.0 // indirect
-	github.com/opencontainers/go-digest v1.0.0 // indirect
-	github.com/opencontainers/image-spec v1.1.0 // indirect
-	github.com/pkg/errors v0.9.1 // indirect
-	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.55.0 // indirect
-	go.opentelemetry.io/otel v1.30.0 // indirect
-	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.30.0 // indirect
-	go.opentelemetry.io/otel/metric v1.30.0 // indirect
-	go.opentelemetry.io/otel/sdk v1.30.0 // indirect
-	go.opentelemetry.io/otel/trace v1.30.0 // indirect
-	golang.org/x/sys v0.25.0 // indirect
-	golang.org/x/time v0.6.0 // indirect
-	gotest.tools/v3 v3.5.1 // indirect
 )

go.sum

@@ -1,127 +1,18 @@
-git.iamthefij.com/iamthefij/slog v1.3.0 h1:4Hu5PQvDrW5e3FrTS3q2iIXW0iPvhNY/9qJsqDR3K3I=
+github.com/Microsoft/go-winio v0.4.9 h1:3RbgqgGVqmcpbOiwrjbVtDHLlJBGF6aE+yHmNtBNsFQ=
-git.iamthefij.com/iamthefij/slog v1.3.0/go.mod h1:1RUj4hcCompZkAxXCRfUX786tb3cM/Zpkn97dGfUfbg=
+github.com/Microsoft/go-winio v0.4.9/go.mod h1:VhR8bwka0BXejwEJY73c50VrPtXAaKcyvVC4A4RozmA=
-github.com/Azure/go-ansiterm v0.0.0-20210617225240-d185dfc1b5a1 h1:UQHMgLO+TxOElx5B5HZ4hJQsoJ/PvUvKRhJHDQXO8P8=
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-google.golang.org/genproto/googleapis/rpc v0.0.0-20240903143218-8af14fe29dc1/go.mod h1:UqMtugtsSgubUsoxbuAoiCXvqvErP7Gf0so0mK9tHxU=
-google.golang.org/grpc v1.66.1 h1:hO5qAXR19+/Z44hmvIM4dQFMSYX9XcWsByfoxutBpAM=
-google.golang.org/grpc v1.66.1/go.mod h1:s3/l6xSSCURdVfAnL+TqCNMyTDAGN6+lZeVxnZR128Y=
-google.golang.org/protobuf v1.34.2 h1:6xV6lTsCfpGD21XK49h7MhtcApnLqkfYgPcdHftf6hg=
-google.golang.org/protobuf v1.34.2/go.mod h1:qYOHts0dSfpeUzUFpOMr/WGzszTmLH+DiWniOlNbLDw=
-gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
-gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-gotest.tools/v3 v3.5.1 h1:EENdUnS3pdur5nybKYIh2Vfgc8IUNBjxDPSjtiJcOzU=
-gotest.tools/v3 v3.5.1/go.mod h1:isy3WKz7GK6uNw/sbHzfKBLvlvXwUyV06n6brMxxopU=

itest/docker-compose.yml

@@ -1,32 +0,0 @@
----
-version: '3'
-
-services:
-  dockron:
-    build:
-      context: ../
-      dockerfile: ./Dockerfile.multi-stage
-    command: ["-watch", "10s", "-debug"]
-    volumes:
-      - /var/run/docker.sock:/var/run/docker.sock:ro
-    environment:
-      DOCKER_API_VERSION: 1.45
-
-  start_echoer:
-    image: busybox:latest
-    command: sh -c "echo ok | tee -a /result.txt"
-    volumes:
-      - "./start_result.txt:/result.txt"
-    labels:
-      # Execute every minute
-      - 'dockron.schedule=* * * * *'
-
-  exec_echoer:
-    image: busybox:latest
-    command: sh -c "tail -f /result.txt"
-    volumes:
-      - "./exec_result.txt:/result.txt"
-    labels:
-      # Execute every minute
-      - 'dockron.test.schedule=* * * * *'
-      - 'dockron.test.command=echo ok | tee /result.txt && echo "Yay!"'

itest/itest.sh

@@ -1,47 +0,0 @@
-#! /bin/bash
-
-set -e
-
-# Change to itest dir
-cd "$(dirname "$0")"
-
-function check_results() {
-    local f=$1
-    local min=$2
-    awk "/ok/ { count=count+1 } END { print \"$f: Run count\", count; if (count < $min) { print \"Expected > $min\"; exit 1 } }" "$f"
-}
-
-function main() {
-    # Clear and create result files
-    echo "start" > ./start_result.txt
-    echo "start" > ./exec_result.txt
-
-    # Clean old containers
-    docker compose down || true
-    # Start containers
-    echo "Starting containers"
-    docker compose up -d --build
-    # Schedules run on the shortest interval of a minute. This should allow time
-    # for the containers to start and execute once
-    local seconds=$((65 - $(date +"%S")))
-    echo "Containers started. Sleeping for ${seconds}s to let schedules run"
-    sleep $seconds
-
-    echo "Stopping containers"
-    docker compose stop
-
-    # Print logs
-    docker compose logs
-
-    # Validate result shows minimum amount of executions
-    check_results ./start_result.txt 2
-    check_results ./exec_result.txt 1
-
-    # Check for exec output
-    if ! (docker compose logs | grep -q "Yay!"); then
-        echo "Exec output 'Yay!' not found"
-        exit 1
-    fi
-}
-
-main

main.go

@@ -1,373 +1,106 @@
 package main
 
 import (
-	"bufio"
 	"flag"
 	"fmt"
-	"os"
+	"github.com/docker/docker/api/types"
-	"regexp"
+	"github.com/docker/docker/client"
+	"github.com/robfig/cron"
+	"golang.org/x/net/context"
 	"strings"
 	"time"
-
-	"git.iamthefij.com/iamthefij/slog"
-	dockerTypes "github.com/docker/docker/api/types"
-	"github.com/docker/docker/api/types/container"
-	dockerClient "github.com/docker/docker/client"
-	"github.com/robfig/cron/v3"
-	"golang.org/x/net/context"
 )
 
-var (
+// WatchInterval is the duration we should sleep until polling Docker
-	// defaultWatchInterval is the duration we should sleep until polling Docker
+var DefaultWatchInterval = (1 * time.Minute)
-	defaultWatchInterval = (1 * time.Minute)
 
-	// schedLabel is the string label to search for cron expressions
+// SchedLabel is the string label to search for cron expressions
-	schedLabel = "dockron.schedule"
+var SchedLabel = "dockron.schedule"
-	// execLabelRegex is will capture labels for an exec job
-	execLabelRegexp = regexp.MustCompile(`dockron\.([a-zA-Z0-9_-]+)\.(schedule|command)`)
-
-	// version of dockron being run
-	version = "dev"
-)
-
-// ContainerClient provides an interface for interracting with Docker. Makes it possible to mock in tests
-type ContainerClient interface {
-	ContainerExecCreate(ctx context.Context, container string, config container.ExecOptions) (dockerTypes.IDResponse, error)
-	ContainerExecInspect(ctx context.Context, execID string) (container.ExecInspect, error)
-	ContainerExecStart(ctx context.Context, execID string, config container.ExecStartOptions) error
-	ContainerExecAttach(ctx context.Context, execID string, options container.ExecAttachOptions) (dockerTypes.HijackedResponse, error)
-	ContainerInspect(ctx context.Context, containerID string) (dockerTypes.ContainerJSON, error)
-	ContainerList(context context.Context, options container.ListOptions) ([]dockerTypes.Container, error)
-	ContainerStart(context context.Context, containerID string, options container.StartOptions) error
-}
-
-// ContainerCronJob is an interface of a job to run on containers
-type ContainerCronJob interface {
-	Run()
-	Name() string
-	UniqueName() string
-	Schedule() string
-}
 
 // ContainerStartJob represents a scheduled container task
 // It contains a reference to a client, the schedule to run on, and the
 // ID of that container that should be started
 type ContainerStartJob struct {
-	client      ContainerClient
+	Client      *client.Client
-	context     context.Context
+	ContainerID string
-	name        string
+	Context     context.Context
-	containerID string
+	Name        string
-	schedule    string
+	Schedule    string
 }
 
 // Run is executed based on the ContainerStartJob Schedule and starts the
 // container
 func (job ContainerStartJob) Run() {
-	slog.Infof("Starting: %s", job.name)
+	fmt.Println("Starting:", job.Name)
-
+	err := job.Client.ContainerStart(job.Context, job.ContainerID, types.ContainerStartOptions{})
-	// Check if container is already running
+	if err != nil {
-	containerJSON, err := job.client.ContainerInspect(
+		panic(err)
-		job.context,
-		job.containerID,
-	)
-	slog.OnErrPanicf(err, "Could not get container details for job %s", job.name)
-
-	if containerJSON.State.Running {
-		slog.Warningf("%s: Container is already running. Skipping start.", job.name)
-
-		return
-	}
-
-	// Start job
-	err = job.client.ContainerStart(
-		job.context,
-		job.containerID,
-		container.StartOptions{},
-	)
-	slog.OnErrPanicf(err, "Could not start container for job %s", job.name)
-
-	// Check results of job
-	for check := true; check; check = containerJSON.State.Running {
-		slog.Debugf("%s: Still running", job.name)
-
-		containerJSON, err = job.client.ContainerInspect(
-			job.context,
-			job.containerID,
-		)
-		slog.OnErrPanicf(err, "Could not get container details for job %s", job.name)
-
-		time.Sleep(1 * time.Second)
-	}
-	slog.Debugf("%s: Done running. %+v", job.name, containerJSON.State)
-
-	// Log exit code if failed
-	if containerJSON.State.ExitCode != 0 {
-		slog.Errorf(
-			"%s: Exec job exited with code %d",
-			job.name,
-			containerJSON.State.ExitCode,
-		)
-	}
-}
-
-// Name returns the name of the job
-func (job ContainerStartJob) Name() string {
-	return job.name
-}
-
-// Schedule returns the schedule of the job
-func (job ContainerStartJob) Schedule() string {
-	return job.schedule
-}
-
-// UniqueName returns a unique identifier for a container start job
-func (job ContainerStartJob) UniqueName() string {
-	// ContainerID should be unique as a change in label will result in
-	// a new container as they are immutable
-	return job.name + "/" + job.containerID
-}
-
-// ContainerExecJob is a scheduled job to be executed in a running container
-type ContainerExecJob struct {
-	ContainerStartJob
-	shellCommand string
-}
-
-// Run is executed based on the ContainerStartJob Schedule and starts the
-// container
-func (job ContainerExecJob) Run() {
-	slog.Infof("Execing: %s", job.name)
-	containerJSON, err := job.client.ContainerInspect(
-		job.context,
-		job.containerID,
-	)
-	slog.OnErrPanicf(err, "Could not get container details for job %s", job.name)
-
-	if !containerJSON.State.Running {
-		slog.Warningf("%s: Container not running. Skipping exec.", job.name)
-
-		return
-	}
-
-	execID, err := job.client.ContainerExecCreate(
-		job.context,
-		job.containerID,
-		container.ExecOptions{
-			AttachStdout: true,
-			AttachStderr: true,
-			Cmd:          []string{"sh", "-c", strings.TrimSpace(job.shellCommand)},
-		},
-	)
-	slog.OnErrPanicf(err, "Could not create container exec job for %s", job.name)
-
-	hj, err := job.client.ContainerExecAttach(job.context, execID.ID, container.ExecAttachOptions{})
-	slog.OnErrWarnf(err, "%s: Error attaching to exec: %s", job.name, err)
-	defer hj.Close()
-
-	scanner := bufio.NewScanner(hj.Reader)
-
-	err = job.client.ContainerExecStart(
-		job.context,
-		execID.ID,
-		container.ExecStartOptions{},
-	)
-	slog.OnErrPanicf(err, "Could not start container exec job for %s", job.name)
-
-	// Wait for job results
-	execInfo := container.ExecInspect{Running: true}
-	for execInfo.Running {
-		time.Sleep(1 * time.Second)
-
-		slog.Debugf("Still execing %s", job.name)
-		execInfo, err = job.client.ContainerExecInspect(
-			job.context,
-			execID.ID,
-		)
-
-		// Maybe print output
-		if hj.Reader != nil {
-			for scanner.Scan() {
-				line := scanner.Text()
-				if len(line) > 0 {
-					slog.Infof("%s: Exec output: %s", job.name, line)
-				} else {
-					slog.Debugf("%s: Empty exec output", job.name)
-				}
-
-				if err := scanner.Err(); err != nil {
-					slog.OnErrWarnf(err, "%s: Error reading from exec", job.name)
-				}
-			}
-		} else {
-			slog.Debugf("%s: No exec reader", job.name)
-		}
-
-		slog.Debugf("%s: Exec info: %+v", job.name, execInfo)
-
-		if err != nil {
-			// Nothing we can do if we got an error here, so let's go
-			slog.OnErrWarnf(err, "%s: Could not get status for exec job", job.name)
-
-			return
-		}
-	}
-	slog.Debugf("%s: Done execing. %+v", job.name, execInfo)
-	// Log exit code if failed
-	if execInfo.ExitCode != 0 {
-		slog.Errorf("%s: Exec job existed with code %d", job.name, execInfo.ExitCode)
 	}
 }
 
 // QueryScheduledJobs queries Docker for all containers with a schedule and
-// returns a list of ContainerCronJob records to be scheduled
+// returns a list of ContainerStartJob records to be scheduled
-func QueryScheduledJobs(client ContainerClient) (jobs []ContainerCronJob) {
+func QueryScheduledJobs(cli *client.Client) (jobs []ContainerStartJob) {
-	slog.Debugf("Scanning containers for new schedules...")
+	fmt.Println("Scanning containers for new schedules...")
-
+	containers, err := cli.ContainerList(context.Background(), types.ContainerListOptions{All: true})
-	containers, err := client.ContainerList(
+	if err != nil {
-		context.Background(),
+		panic(err)
-		container.ListOptions{All: true},
+	}
-	)
-	slog.OnErrPanicf(err, "Failure querying docker containers")
 
 	for _, container := range containers {
-		// Add start job
+		if val, ok := container.Labels[SchedLabel]; ok {
-		if val, ok := container.Labels[schedLabel]; ok {
 			jobName := strings.Join(container.Names, "/")
-
 			jobs = append(jobs, ContainerStartJob{
-				client:      client,
+				Schedule:    val,
-				containerID: container.ID,
+				Client:      cli,
-				context:     context.Background(),
+				ContainerID: container.ID,
-				schedule:    val,
+				Context:     context.Background(),
-				name:        jobName,
+				Name:        jobName,
-			})
-		}
-
-		// Add exec jobs
-		execJobs := map[string]map[string]string{}
-
-		for label, value := range container.Labels {
-			results := execLabelRegexp.FindStringSubmatch(label)
-			expectedLabelParts := 3
-
-			if len(results) == expectedLabelParts {
-				// We've got part of a new job
-				jobName, jobField := results[1], results[2]
-				if partJob, ok := execJobs[jobName]; ok {
-					// Partial exists, add the other value
-					partJob[jobField] = value
-				} else {
-					// No partial exists, add this part
-					execJobs[jobName] = map[string]string{
-						jobField: value,
-					}
-				}
-			}
-		}
-
-		for jobName, jobConfig := range execJobs {
-			schedule, ok := jobConfig["schedule"]
-			if !ok {
-				continue
-			}
-
-			shellCommand, ok := jobConfig["command"]
-			if !ok {
-				continue
-			}
-
-			jobs = append(jobs, ContainerExecJob{
-				ContainerStartJob: ContainerStartJob{
-					client:      client,
-					containerID: container.ID,
-					context:     context.Background(),
-					schedule:    schedule,
-					name:        strings.Join(append(container.Names, jobName), "/"),
-				},
-				shellCommand: shellCommand,
 			})
 		}
 	}
 
-	return jobs
+	return
 }
 
 // ScheduleJobs accepts a Cron instance and a list of jobs to schedule.
 // It then schedules the provided jobs
-func ScheduleJobs(c *cron.Cron, jobs []ContainerCronJob) {
+func ScheduleJobs(c *cron.Cron, jobs []ContainerStartJob) {
-	// Fetch existing jobs from the cron
-	existingJobs := map[string]cron.EntryID{}
-	for _, entry := range c.Entries() {
-		// This should be safe since ContainerCronJob is the only type of job we use
-		existingJobs[entry.Job.(ContainerCronJob).UniqueName()] = entry.ID
-	}
-
 	for _, job := range jobs {
-		if _, ok := existingJobs[job.UniqueName()]; ok {
+		fmt.Printf("Scheduling %s (%s) with schedule '%s'\n", job.Name, job.ContainerID[:10], job.Schedule)
-			// Job already exists, remove it from existing jobs so we don't
+		c.AddJob(job.Schedule, job)
-			// unschedule it later
-			slog.Debugf("Job %s is already scheduled. Skipping", job.Name())
-			delete(existingJobs, job.UniqueName())
-
-			continue
-		}
-
-		// Job doesn't exist yet, schedule it
-		_, err := c.AddJob(job.Schedule(), job)
-		if err == nil {
-			slog.Infof(
-				"Scheduled %s (%s) with schedule '%s'\n",
-				job.Name(),
-				job.UniqueName(),
-				job.Schedule(),
-			)
-		} else {
-			// TODO: Track something for a healthcheck here
-			slog.Errorf(
-				"Could not schedule %s (%s) with schedule '%s'. %v\n",
-				job.Name(),
-				job.UniqueName(),
-				job.Schedule(),
-				err,
-			)
-		}
-	}
-
-	// Remove remaining scheduled jobs that weren't in the new list
-	for _, entryID := range existingJobs {
-		c.Remove(entryID)
 	}
 }
 
 func main() {
 	// Get a Docker Client
-	client, err := dockerClient.NewClientWithOpts(dockerClient.FromEnv)
+	cli, err := client.NewEnvClient()
-	slog.OnErrPanicf(err, "Could not create Docker client")
+	if err != nil {
+		panic(err)
+	}
 
 	// Read interval for polling Docker
 	var watchInterval time.Duration
-
+	flag.DurationVar(&watchInterval, "watch", DefaultWatchInterval, "Interval used to poll Docker for changes")
-	showVersion := flag.Bool("version", false, "Display the version of dockron and exit")
-
-	flag.DurationVar(&watchInterval, "watch", defaultWatchInterval, "Interval used to poll Docker for changes")
-	flag.BoolVar(&slog.DebugLevel, "debug", false, "Show debug logs")
 	flag.Parse()
 
-	// Print version if asked
-	if *showVersion {
-		fmt.Println("Dockron version:", version)
-		os.Exit(0)
-	}
-
 	// Create a Cron
 	c := cron.New()
-	c.Start()
 
 	// Start the loop
 	for {
+		// HACK: This is risky as it could fall on the same interval as a task and that task would get skipped
+		// It would be best to manage a ContainerID to Job mapping and then remove entries that are missing
+		// in the new list and add new entries. However, cron does not support this yet.
+
+		// Stop and create a new cron
+		c.Stop()
+		c = cron.New()
+
 		// Schedule jobs again
-		jobs := QueryScheduledJobs(client)
+		jobs := QueryScheduledJobs(cli)
 		ScheduleJobs(c, jobs)
+		c.Start()
 
 		// Sleep until the next query time
 		time.Sleep(watchInterval)