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" {
%{~ if use_wesher ~}
host_network = "wesher"
%{~ endif ~}
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to = "4000"
}
dns {
# Set expclicit DNS servers because tasks, by default, use this task
servers = [
"192.168.2.1",
]
}
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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:v0.22"
args = ["-c", "$${NOMAD_TASK_DIR}/config.yml"]
ports = ["dns", "api"]
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}
resources {
cpu = 50
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memory = 75
memory_max = 150
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}
template {
data = var.config_data
destination = "$${NOMAD_TASK_DIR}/config.yml"
splay = "1m"
wait {
min = "10s"
max = "20s"
}
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}
template {
data = <<EOF
{{ range nomadServices }}
{{ range nomadService 1 (env "NOMAD_ALLOC_ID") .Name -}}
{{ .Address }} {{ .Name }}.nomad
{{- end }}
{{- end }}
EOF
destination = "$${NOMAD_TASK_DIR}/nomad.hosts"
change_mode = "noop"
wait {
min = "10s"
max = "20s"
}
}
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}
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task "stunnel" {
driver = "docker"
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lifecycle {
hook = "prestart"
sidecar = true
}
config {
image = "iamthefij/stunnel:latest"
args = ["$${NOMAD_TASK_DIR}/stunnel.conf"]
ports = ["tls"]
}
resources {
cpu = 20
memory = 100
}
template {
data = <<EOF
syslog = no
foreground = yes
delay = yes
{{ range nomadService 1 (env "NOMAD_ALLOC_ID") "mysql-tls" -}}
[mysql_client]
client = yes
accept = 127.0.0.1:3306
connect = {{ .Address }}:{{ .Port }}
PSKsecrets = {{ env "NOMAD_SECRETS_DIR" }}/mysql_stunnel_psk.txt
{{- end }}
{{ range nomadService 1 (env "NOMAD_ALLOC_ID") "redis-blocky" -}}
[redis_client]
client = yes
accept = 127.0.0.1:6379
connect = {{ .Address }}:{{ .Port }}
PSKsecrets = {{ env "NOMAD_SECRETS_DIR" }}/stunnel_psk.txt
{{- end }}
EOF
destination = "$${NOMAD_TASK_DIR}/stunnel.conf"
}
template {
data = <<EOF
{{- with nomadVar "secrets/mysql/allowed_psks/blocky" }}{{ .psk }}{{ end -}}
EOF
destination = "$${NOMAD_SECRETS_DIR}/mysql_stunnel_psk.txt"
}
template {
data = <<EOF
{{- with nomadVar "nomad/jobs/blocky/blocky/stunnel" -}}{{ .redis_stunnel_psk }}{{ end -}}
EOF
destination = "$${NOMAD_SECRETS_DIR}/stunnel_psk.txt"
}
}
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task "mysql-bootstrap" {
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driver = "docker"
lifecycle {
hook = "prestart"
sidecar = false
}
config {
image = "mariadb:10"
args = [
"/usr/bin/timeout",
"2m",
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"/bin/bash",
"-c",
"until /usr/bin/mysql --defaults-extra-file=$${NOMAD_SECRETS_DIR}/my.cnf < $${NOMAD_SECRETS_DIR}/bootstrap.sql; do sleep 10; done",
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]
}
template {
data = <<EOF
[client]
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host=127.0.0.1
port=3306
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user=root
{{ with nomadVar "secrets/mysql" }}
password={{ .mysql_root_password }}
{{ end }}
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EOF
destination = "$${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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}
}