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" {
host_network = "wesher"
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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"
provider = "nomad"
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port = "dns"
}
service {
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name = "blocky-api"
provider = "nomad"
port = "api"
tags = [
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"prometheus.scrape",
"traefik.enable=true",
"traefik.http.routers.blocky-api.entryPoints=websecure",
]
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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}
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 "redis-stunnel" {
driver = "docker"
config {
image = "alpine:3.17"
ports = ["tls"]
args = ["/bin/sh", "${NOMAD_TASK_DIR}/start.sh"]
}
resources {
cpu = 20
memory = 100
}
template {
data = <<EOF
set -e
apk add stunnel
exec stunnel {{ env "NOMAD_TASK_DIR" }}/stunnel.conf
EOF
destination = "${NOMAD_TASK_DIR}/start.sh"
}
template {
data = <<EOF
syslog = no
foreground = yes
delay = yes
[redis_client]
client = yes
accept = 127.0.0.1:6379
{{ range nomadService 1 (env "NOMAD_ALLOC_ID") "redis-tls" -}}
connect = {{ .Address }}:{{ .Port }}
{{- end }}
PSKsecrets = {{ env "NOMAD_SECRETS_DIR" }}/stunnel_psk.txt
EOF
destination = "${NOMAD_TASK_DIR}/stunnel.conf"
}
template {
data = <<EOF
{{ with nomadVar "nomad/jobs/blocky" -}}
{{ .redis_stunnel_psk }}
{{- end }}
EOF
destination = "${NOMAD_SECRETS_DIR}/stunnel_psk.txt"
}
}
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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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]
}
template {
data = <<EOF
[client]
{{ range nomadService 1 (env "NOMAD_ALLOC_ID") "mysql-server" -}}
host={{ .Address }}
port={{ .Port }}
{{ end -}}
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user=root
{{ with nomadVar "nomad/jobs" }}
password={{ .mysql_root_password }}
{{ end }}
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EOF
destination = "$${NOMAD_SECRETS_DIR}/my.cnf"
}
template {
data = <<EOF
{{ with nomadVar "nomad/jobs/blocky" }}{{ if .db_name -}}
{{ $db_name := .db_name }}
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CREATE DATABASE IF NOT EXISTS `{{ $db_name }}`;
CREATE USER IF NOT EXISTS '{{ .db_user }}'@'%' IDENTIFIED BY '{{ .db_pass }}';
GRANT ALL ON `{{ $db_name }}`.* to '{{ .db_user }}'@'%';
{{ with nomadService "grafana" }}{{ with nomadVar "nomad/jobs" -}}
-- Grant grafana read_only user access to db
GRANT SELECT ON `{{ $db_name }}`.* to '{{ .db_user_ro }}'@'%';
{{ end }}{{ end -}}
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{{ else -}}
SELECT 'NOOP';
{{ end -}}{{ end -}}
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EOF
destination = "$${NOMAD_SECRETS_DIR}/bootstrap.sql"
}
resources {
cpu = 50
memory = 50
}
}
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}
}