Periodic job to renew lego certs and store them in Nomad Variables

This will allow multiple instance of Traefik to serve certs.
This commit is contained in:
IamTheFij 2024-01-03 13:55:32 -08:00
parent bcad131aa7
commit 0d340f3349
3 changed files with 118 additions and 0 deletions

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@ -95,6 +95,10 @@ nomad/jobs/immich:
nomad/jobs/ipdvr/radarr: nomad/jobs/ipdvr/radarr:
db_pass: VALUE db_pass: VALUE
db_user: VALUE db_user: VALUE
nomad/jobs/lego:
acme_email: VALUE
domain_lego_dns: VALUE
usersfile: VALUE
nomad/jobs/lidarr: nomad/jobs/lidarr:
db_name: VALUE db_name: VALUE
db_pass: VALUE db_pass: VALUE

91
core/lego.nomad Normal file
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@ -0,0 +1,91 @@
variable "lego_version" {
default = "4.14.2"
type = string
}
variable "nomad_var_dirsync_version" {
default = "0.0.2"
type = string
}
job "lego" {
type = "batch"
periodic {
cron = "@weekly"
prohibit_overlap = true
}
group "main" {
task "main" {
driver = "exec"
config {
# image = "alpine:3"
command = "/bin/bash"
args = ["${NOMAD_TASK_DIR}/start.sh"]
}
artifact {
source = "https://github.com/go-acme/lego/releases/download/v${var.lego_version}/lego_v${var.lego_version}_linux_${attr.cpu.arch}.tar.gz"
}
artifact {
source = "https://git.iamthefij.com/iamthefij/nomad-var-dirsync/releases/download/v${var.nomad_var_dirsync_version}/nomad-var-dirsync-linux-${attr.cpu.arch}.tar.gz"
}
template {
data = <<EOH
#! /bin/sh
set -ex
cd ${NOMAD_TASK_DIR}
echo "Read certs from nomad vars"
${NOMAD_TASK_DIR}/nomad-var-dirsync-linux-{{ env "attr.cpu.arch" }} -root-var=secrets/certs read .
action=run
if [ -f /.lego/certificates/_.thefij.rocks.crt ]; then
action=renew
fi
echo "Attempt to $action certificates"
${NOMAD_TASK_DIR}/lego \
--accept-tos --pem \
--email=iamthefij@gmail.com \
--domains="*.thefij.rocks" \
--dns="cloudflare" \
$action \
--$action-hook="${NOMAD_TASK_DIR}/nomad-var-dirsync-linux-{{ env "attr.cpu.arch" }} -root-var=secrets/certs write .lego" \
EOH
destination = "${NOMAD_TASK_DIR}/start.sh"
}
template {
data = <<EOH
{{ with nomadVar "nomad/jobs/lego" -}}
CF_DNS_API_TOKEN={{ .domain_lego_dns }}
CF_ZONE_API_TOKEN={{ .domain_lego_dns }}
{{- end }}
EOH
destination = "secrets/cloudflare.env"
env = true
}
env = {
NOMAD_ADDR = "unix:///secrets/api.sock"
}
identity {
env = true
}
resources {
cpu = 50
memory = 100
}
}
}
}

23
core/lego.tf Normal file
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@ -0,0 +1,23 @@
resource "nomad_job" "lego" {
jobspec = file("${path.module}/lego.nomad")
}
resource "nomad_acl_policy" "secrets_certs_write" {
name = "secrets-certs-write"
description = "Write certs to secrets store"
rules_hcl = <<EOH
namespace "default" {
variables {
path "secrets/certs/*" {
capabilities = ["write", "read"]
}
path "secrets/certs" {
capabilities = ["write", "read"]
}
}
}
EOH
job_acl {
job_id = "lego/*"
}
}