homelab-nomad/core/blocky/blocky.nomad

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variable "config_data" {
type = string
description = "Plain text config file for blocky"
}
job "blocky" {
datacenters = ["dc1"]
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type = "system"
priority = 100
update {
max_parallel = 1
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# TODO: maybe switch to service job from system so we can use canary and autorollback
# auto_revert = true
}
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group "blocky" {
network {
mode = "bridge"
port "dns" {
static = "53"
}
port "api" {
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# TODO: This may be broken. It seems we're exposing the loopback address which can't be reached
# host_network = "loopback"
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to = "4000"
}
dns {
# Set expclicit DNS servers because tasks, by default, use this task
servers = ["1.1.1.1", "1.0.0.1"]
}
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}
service {
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name = "blocky-dns"
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port = "dns"
}
service {
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name = "blocky-api"
port = "api"
meta {
metrics_addr = "${NOMAD_ADDR_api}"
}
tags = [
"traefik.enable=true",
"traefik.http.routers.blocky-api.entryPoints=websecure",
]
connect {
sidecar_service {
proxy {
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local_service_port = 4000
expose {
path {
path = "/metrics"
protocol = "http"
local_path_port = 4000
listener_port = "api"
}
}
upstreams {
destination_name = "redis"
local_bind_port = 6379
}
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upstreams {
destination_name = "mysql-server"
local_bind_port = 4040
}
}
}
sidecar_task {
resources {
cpu = 50
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memory = 20
memory_max = 50
}
}
}
check {
name = "api-health"
port = "api"
type = "http"
path = "/"
interval = "10s"
timeout = "3s"
}
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}
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task "blocky" {
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driver = "docker"
config {
image = "ghcr.io/0xerr0r/blocky"
ports = ["dns", "api"]
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mount {
type = "bind"
target = "/app/config.yml"
source = "app/config.yml"
}
}
resources {
cpu = 50
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memory = 50
memory_max = 100
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}
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vault {
policies = [
"access-tables",
"nomad-task",
]
}
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template {
data = var.config_data
destination = "app/config.yml"
splay = "1m"
wait {
min = "10s"
max = "20s"
}
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}
}
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task "blocky-bootstrap" {
driver = "docker"
lifecycle {
hook = "prestart"
sidecar = false
}
config {
image = "mariadb:10"
args = [
"/bin/bash",
"-c",
"/usr/bin/mysql --defaults-extra-file=$${NOMAD_SECRETS_DIR}/my.cnf < $${NOMAD_SECRETS_DIR}/bootstrap.sql || echo 'SQL Failed'",
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]
}
vault {
policies = [
"access-tables",
"nomad-task",
]
}
template {
data = <<EOF
[client]
host={{ env "NOMAD_UPSTREAM_IP_mysql_server" }}
port={{ env "NOMAD_UPSTREAM_PORT_mysql_server" }}
user=root
{{ with service "vault" -}}{{ with secret "kv/data/mysql" }}
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password={{ .Data.data.root_password }}
{{ end -}}{{ end -}}
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EOF
destination = "$${NOMAD_SECRETS_DIR}/my.cnf"
}
template {
data = <<EOF
{{ with service "vault" -}}{{ with secret "kv/data/blocky" -}}
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{{ if .Data.data.db_name -}}
{{ $db_name := .Data.data.db_name }}
CREATE DATABASE IF NOT EXISTS `{{ $db_name }}`;
CREATE USER IF NOT EXISTS '{{ .Data.data.db_user }}'@'%' IDENTIFIED BY '{{ .Data.data.db_pass }}';
GRANT ALL ON `{{ $db_name }}`.* to '{{ .Data.data.db_user }}'@'%';
{{ with secret "kv/data/grafana" -}}
-- Add grafana read_only user
CREATE USER IF NOT EXISTS '{{ .Data.data.db_user_ro }}'@'%' IDENTIFIED BY '{{ .Data.data.db_pass_ro }}';
GRANT SELECT ON `{{ $db_name }}`.* to '{{ .Data.data.db_user_ro }}'@'%';
{{ end -}}
{{ else -}}
SELECT 'NOOP';
{{ end -}}
{{ end -}}{{ end -}}
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EOF
destination = "$${NOMAD_SECRETS_DIR}/bootstrap.sql"
}
resources {
cpu = 50
memory = 50
}
}
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}
}