homelab-nomad/services/service/service_template.nomad

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job "${name}" {
region = "global"
datacenters = ["dc1"]
type = "service"
priority = ${priority}
group "${name}" {
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count = ${count}
network {
mode = "bridge"
%{ if service_port != null ~}
port "main" {
%{~ if use_wesher ~}
host_network = "wesher"
%{~ endif ~}
%{ if service_port_static ~}
static = ${service_port}
%{ else ~}
to = ${service_port}
%{~ endif }
}
%{ endif ~}
%{ for port in ports ~}
port "${port.name}" {
%{ if port.host_network != null }host_network = "${port.host_network}"%{ endif ~}
%{ if port.from != null }to = ${port.from}%{ endif ~}
%{ if port.to != null }to = ${port.to}%{ endif ~}
%{ if port.static != null }static = ${port.static}%{ endif ~}
}
%{ endfor }
}
%{ for constraint in constraints ~}
constraint {
attribute = "${constraint.attribute}"
operator = "${constraint.operator}"
value = "${constraint.value}"
}
%{ endfor ~}
%{ if length(group_meta) > 0 }
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meta = {
%{ for k, v in group_meta }
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${k} = ${jsonencode(v)}
%{ endfor }
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}
%{~ endif }
%{ if sticky_disk }
ephemeral_disk {
migrate = true
sticky = true
}
%{~ endif }
%{ for host_volume in host_volumes }
volume "${host_volume.name}" {
type = "host"
read_only = ${host_volume.read_only}
source = "${host_volume.name}"
}
%{ endfor }
%{ if service_port != null ~}
service {
name = "${replace(name, "_", "-")}"
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provider = "nomad"
port = "main"
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tags = [
%{ if prometheus == true }
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"prometheus.scrape",
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%{ endif }
%{ if ingress }
"traefik.enable=true",
"traefik.http.routers.${name}.entryPoints=websecure",
%{ if try(ingress_rule, null) != null ~}
"traefik.http.routers.${name}.rule=${ingress_rule}",
%{ endif ~}
%{ for middleware in ingress_middlewares ~}
"traefik.http.routers.${name}.middlewares=${middleware}",
%{ endfor ~}
%{ endif ~}
%{ for tag in service_tags ~}
"${tag}",
%{ endfor ~}
]
}
%{ endif ~}
%{ for custom_service in custom_services }
service {
name = "${custom_service.name}"
provider = "nomad"
port = "${custom_service.port}"
tags = ${jsonencode(custom_service.tags)}
}
%{ endfor }
task "${name}" {
driver = "docker"
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%{ if length(meta) > 0 ~}
meta = {
%{ for k, v in meta ~}
${k} = ${jsonencode(v)}
%{ endfor ~}
}
%{ endif ~}
config {
image = "${image}"
%{if image_pull_timeout != null ~}
image_pull_timeout = "${image_pull_timeout}"
%{ endif ~}
%{ if service_port != null ~}
ports = ["main"]
%{ endif ~}
%{ if length(try(args, [])) > 0 ~}
args = ${jsonencode(args)}
%{ endif ~}
%{ if length(docker_devices) > 0 ~}
devices = [
%{ for dev in docker_devices }
{
host_path = "${dev.host_path}"
container_path = "${dev.container_path}"
},
%{ endfor }
]
%{ endif ~}
%{ for template in templates ~}
%{ if template.mount && !template.env ~}
mount {
type = "bind"
target = "${template.dest}"
source = "${template.dest_prefix}/${template.dest}"
}
%{ endif ~}
%{ endfor ~}
}
%{ if length(env) > 0 ~}
env = {
%{ for k, v in env ~}
"${k}" = "${v}"
%{ endfor }
}
%{ endif ~}
%{ for volume in host_volumes ~}
volume_mount {
volume = "${volume.name}"
destination = "${volume.dest}"
read_only = ${volume.read_only}
}
%{ endfor ~}
%{ for template in templates ~}
template {
data = <<EOF
${template.data}
EOF
destination = "${coalesce(template.dest_prefix, "$${NOMAD_TASK_DIR}")}/${template.dest}"
%{ if template.left_delimiter != null }left_delimiter = "${template.left_delimiter}"%{ endif }
%{ if template.right_delimiter != null }right_delimiter = "${template.right_delimiter}"%{ endif }
%{ if template.change_mode != null }change_mode = "${template.change_mode}"%{ endif }
%{ if template.change_signal != null }change_signal = "${template.change_signal}"%{ endif }
%{ if template.env != null }env = ${template.env}%{ endif }
}
%{ endfor ~}
%{ if resources != null }
resources {
cpu = ${resources.cpu}
memory = ${resources.memory}
%{ if resources.memory_max != null }memory_max = ${resources.memory_max}%{ endif }
}
%{~ endif }
}
%{ if mysql_bootstrap != null ~}
task "mysql-bootstrap" {
driver = "docker"
lifecycle {
hook = "prestart"
sidecar = false
}
config {
image = "mariadb:10"
args = [
"/usr/bin/timeout",
"2m",
"/bin/bash",
"-c",
"until /usr/bin/mysql --defaults-extra-file=$${NOMAD_SECRETS_DIR}/my.cnf < $${NOMAD_SECRETS_DIR}/bootstrap.sql; do sleep 10; done",
]
}
template {
data = <<EOF
[client]
host=127.0.0.1
port=3306
user=root
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# TODO: Use via lesser scoped access
{{ with nomadVar "nomad/jobs" -}}
password={{ .mysql_root_password }}
{{ end -}}
EOF
destination = "$${NOMAD_SECRETS_DIR}/my.cnf"
}
template {
data = <<EOF
{{ with nomadVar "nomad/jobs/${name}" -}}
{{ $db_name := .${mysql_bootstrap.db_name_key} }}
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CREATE DATABASE IF NOT EXISTS `{{ .${mysql_bootstrap.db_name_key} }}`
CHARACTER SET = 'utf8mb4'
COLLATE = 'utf8mb4_unicode_ci';
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CREATE USER IF NOT EXISTS '{{ .${mysql_bootstrap.db_user_key} }}'@'%'
IDENTIFIED BY '{{ .${mysql_bootstrap.db_pass_key} }}';
GRANT ALL ON `{{ .${mysql_bootstrap.db_name_key} }}`.*
TO '{{ .${mysql_bootstrap.db_user_key} }}'@'%';
%{ if mysql_bootstrap.add_ro ~}
{{ 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 }}
%{~ endif }
{{ else -}}
SELECT 'NOOP';
{{ end -}}
EOF
destination = "$${NOMAD_SECRETS_DIR}/bootstrap.sql"
}
resources {
cpu = 50
memory = 50
}
}
%{ endif }
%{ if postgres_bootstrap != null ~}
task "postgres-bootstrap" {
driver = "docker"
lifecycle {
hook = "prestart"
sidecar = false
}
config {
image = "postgres:14"
args = [
"/usr/bin/timeout",
"2m",
"/bin/bash",
"-c",
"until /bin/bash $${NOMAD_TASK_DIR}/bootstrap.sh; do sleep 10; done",
]
}
template {
data = <<EOF
%{ if length(postgres_bootstrap.databases) > 0 }
%{ for db_name in postgres_bootstrap.databases ~}
/usr/bin/createdb ${db_name}
%{ endfor }
%{ else }
{{ with nomadVar "nomad/jobs/${name}" }}/usr/bin/createdb {{ .${postgres_bootstrap.db_name_key} }}{{ end }}
%{ endif }
/usr/bin/psql -X -f $${NOMAD_SECRETS_DIR}/bootstrap.sql
EOF
destination = "$${NOMAD_TASK_DIR}/bootstrap.sh"
}
template {
data = <<EOF
PGHOSTADDR=127.0.0.1
PGPORT=5432
{{ with nomadVar "nomad/jobs/${name}/${name}/postgres-bootstrap" }}
PGUSER={{ .superuser }}
# TODO: Passfile?
PGPASSWORD={{ .superuser_pass }}
{{ end }}
EOF
destination = "$${NOMAD_SECRETS_DIR}/db.env"
env = true
}
template {
data = <<EOF
{{ with nomadVar "nomad/jobs/${name}" -}}
DO $$
BEGIN
CREATE ROLE {{ .${postgres_bootstrap.db_user_key} }} LOGIN PASSWORD '{{ .${postgres_bootstrap.db_pass_key} }}';
%{ if length(postgres_bootstrap.databases) > 0 }
%{ for db_name in postgres_bootstrap.databases }
GRANT ALL ON DATABASE "${db_name}" TO {{ .${postgres_bootstrap.db_user_key} }};
%{ endfor }
%{ else }
GRANT ALL ON DATABASE "{{ .${postgres_bootstrap.db_name_key} }}" TO {{ .${postgres_bootstrap.db_user_key} }};
%{ endif }
EXCEPTION WHEN duplicate_object THEN RAISE NOTICE '%, skipping', SQLERRM USING ERRCODE = SQLSTATE;
END
$$;
{{ end }}
EOF
destination = "$${NOMAD_SECRETS_DIR}/bootstrap.sql"
}
resources {
cpu = 50
memory = 50
}
}
%{ endif }
%{ if use_mysql || use_redis || use_ldap || use_postgres ~}
task "stunnel" {
driver = "docker"
lifecycle {
hook = "prestart"
sidecar = true
}
config {
image = "alpine:3.17"
args = ["/bin/sh", "$${NOMAD_TASK_DIR}/start.sh"]
}
resources {
cpu = ${stunnel_resources.cpu}
memory = ${stunnel_resources.memory}
%{ if stunnel_resources.memory_max != null }memory_max = ${stunnel_resources.memory_max}%{ endif }
}
template {
data = <<EOF
set -e
apk add stunnel
exec stunnel {{ env "NOMAD_TASK_DIR" }}/stunnel.conf
EOF
destination = "$${NOMAD_TASK_DIR}/start.sh"
}
template {
data = <<EOF
syslog = no
foreground = yes
delay = yes
%{~ if use_mysql }
[mysql_client]
client = yes
accept = 127.0.0.1:3306
{{ range nomadService 1 (env "NOMAD_ALLOC_ID") "mysql-tls" -}}
connect = {{ .Address }}:{{ .Port }}
{{- end }}
PSKsecrets = {{ env "NOMAD_SECRETS_DIR" }}/mysql_stunnel_psk.txt
%{~ endif }
%{~ if use_redis }
[redis_client]
client = yes
accept = 127.0.0.1:6379
{{ range nomadService 1 (env "NOMAD_ALLOC_ID") "redis-${name}" -}}
connect = {{ .Address }}:{{ .Port }}
{{- end }}
PSKsecrets = {{ env "NOMAD_SECRETS_DIR" }}/redis_stunnel_psk.txt
%{~ endif }
%{~ if use_ldap }
[ldap_client]
client = yes
accept = 127.0.0.1:389
{{ range nomadService 1 (env "NOMAD_ALLOC_ID") "lldap-tls" -}}
connect = {{ .Address }}:{{ .Port }}
{{- end }}
PSKsecrets = {{ env "NOMAD_SECRETS_DIR" }}/ldap_stunnel_psk.txt
%{~ endif }
%{~ if use_postgres }
[postgres_client]
client = yes
accept = 127.0.0.1:5432
{{ range nomadService 1 (env "NOMAD_ALLOC_ID") "postgres-tls" -}}
connect = {{ .Address }}:{{ .Port }}
{{- end }}
PSKsecrets = {{ env "NOMAD_SECRETS_DIR" }}/postgres_stunnel_psk.txt
%{~ endif }
EOF
destination = "$${NOMAD_TASK_DIR}/stunnel.conf"
}
%{~ if use_mysql }
template {
data = <<EOF
{{- with nomadVar "nomad/jobs/${name}/${name}/stunnel" }}{{ .mysql_stunnel_psk }}{{ end -}}
EOF
destination = "$${NOMAD_SECRETS_DIR}/mysql_stunnel_psk.txt"
}
%{ endif }
%{~ if use_redis }
template {
data = <<EOF
{{- with nomadVar "nomad/jobs/${name}/${name}/stunnel" }}{{ .redis_stunnel_psk }}{{ end -}}
EOF
destination = "$${NOMAD_SECRETS_DIR}/redis_stunnel_psk.txt"
}
%{~ endif }
%{~ if use_ldap }
template {
data = <<EOF
{{- with nomadVar "nomad/jobs/${name}/${name}/stunnel" }}{{ .ldap_stunnel_psk }}{{ end -}}
EOF
destination = "$${NOMAD_SECRETS_DIR}/ldap_stunnel_psk.txt"
}
%{~ endif }
%{~ if use_postgres }
template {
data = <<EOF
{{- with nomadVar "nomad/jobs/${name}/${name}/stunnel" }}{{ .postgres_stunnel_psk }}{{ end -}}
EOF
destination = "$${NOMAD_SECRETS_DIR}/postgres_stunnel_psk.txt"
}
%{~ endif }
}
%{~ endif }
}
}