From f11f1f4137abdc9fa4d44f3d5019f092daadd04b Mon Sep 17 00:00:00 2001
From: Ian Fijolek <ian@iamthefij.com>
Date: Fri, 29 Dec 2023 07:38:39 -0800
Subject: [PATCH] WIP: shared lego acme

---
 ansible_playbooks/ansible_hosts.yml          |  6 ++
 ansible_playbooks/vars/nomad_vars.sample.yml |  4 +
 core/acme.tf                                 | 44 +++++++++
 core/lego.nomad                              | 98 ++++++++++++++++++++
 core/lego.tf                                 | 20 ++++
 core/traefik/traefik.nomad                   | 22 +++++
 6 files changed, 194 insertions(+)
 create mode 100644 core/acme.tf
 create mode 100644 core/lego.nomad
 create mode 100644 core/lego.tf

diff --git a/ansible_playbooks/ansible_hosts.yml b/ansible_playbooks/ansible_hosts.yml
index 2e88044..5a08e1b 100644
--- a/ansible_playbooks/ansible_hosts.yml
+++ b/ansible_playbooks/ansible_hosts.yml
@@ -47,6 +47,12 @@ all:
               group: "bin"
               mode: "0755"
               read_only: false
+            - name: certs
+              path: /srv/volumes/certs
+              mode: "0755"
+              owner: root
+              group: bin
+              read_only: false
         pi4:
           nomad_node_role: both
           nomad_reserved_memory: 512
diff --git a/ansible_playbooks/vars/nomad_vars.sample.yml b/ansible_playbooks/vars/nomad_vars.sample.yml
index ea2818b..1b21a3c 100644
--- a/ansible_playbooks/vars/nomad_vars.sample.yml
+++ b/ansible_playbooks/vars/nomad_vars.sample.yml
@@ -95,6 +95,10 @@ nomad/jobs/immich:
 nomad/jobs/ipdvr/radarr:
   db_pass: VALUE
   db_user: VALUE
+nomad/jobs/lego:
+  acme_email: VALUE
+  domain_lego_dns: VALUE
+  usersfile: VALUE
 nomad/jobs/lidarr:
   db_name: VALUE
   db_pass: VALUE
diff --git a/core/acme.tf b/core/acme.tf
new file mode 100644
index 0000000..6717b1f
--- /dev/null
+++ b/core/acme.tf
@@ -0,0 +1,44 @@
+module "acme" {
+  source = "../services/service"
+
+  name  = "acme"
+  image = "caddy:2.7.4"
+  args  = ["caddy", "--config", "$${NOMAD_TASK_DIR}/Caddyfile", "run"]
+
+  ingress      = true
+  service_port = 80
+  use_wesher   = var.use_wesher
+
+  templates = [
+    {
+      data        = <<EOF
+{
+  local_certs
+  debug
+  storage file_system {{ env "NOMAD_ALLOC_DIR" }}/data
+}
+
+:80, :443 {
+  tls internal
+
+  reverse_proxy "/chain" http://localhost:2019 {
+    header_up Host {upstream_hostport}
+    rewrite /pki/ca/local/certificates
+  }
+
+  @denied not remote_ip private_ranges
+  error @denied "Who dis?" 401
+
+  acme_server
+}
+      EOF
+      dest        = "Caddyfile"
+      mount       = false
+      change_mode = "script"
+      change_script = {
+        command = "caddy"
+        args    = ["reload", "--config", "$${NOMAD_TASK_DIR}/Caddyfle"]
+      }
+    },
+  ]
+}
diff --git a/core/lego.nomad b/core/lego.nomad
new file mode 100644
index 0000000..2fd76be
--- /dev/null
+++ b/core/lego.nomad
@@ -0,0 +1,98 @@
+variable "lego_version" {
+  default = "4.14.2"
+  type = string
+}
+
+variable "nomad_version" {
+  default = "1.7.2"
+  type = string
+}
+
+job "lego" {
+
+  type = "batch"
+
+  periodic {
+    cron = "@weekly"
+    prohibit_overlap = true
+  }
+
+  group "main" {
+
+    volume "certs" {
+      type = "host"
+      read_only = true
+      source = "certs"
+    }
+
+    task "main" {
+      driver = "docker"
+
+      config {
+        image = "ubuntu:latest"
+        command = "sh"
+        args = ["${NOMAD_TASK_DIR}/start.sh"]
+      }
+
+      volume_mount {
+        volume = "certs"
+        destination = "/root/.lego"
+        read_only = true
+      }
+
+      artifact {
+        source = "https://github.com/go-acme/lego/releases/download/v${var.lego_version}/lego_v${var.lego_version}_linux_${attr.cpu.arch}.tar.gz"
+      }
+
+      artifact {
+        source = "https://releases.hashicorp.com/nomad/${var.nomad_version}/nomad_${var.nomad_version}_linux_${attr.cpu.arch}.zip"
+      }
+
+      template {
+        data = <<EOH
+#! /bin/sh
+
+ls -l ${NOMAD_TASK_DIR}
+
+arg=run
+if [ -f /root/.lego/certificates/_.thefij.rocks.crt ]; then
+    arg=renew
+fi
+
+${NOMAD_TASK_DIR}/lego \
+    --server=https://acme-staging-v02.api.letsencrypt.org/directory \
+    --accept-tos --pem \
+    --email=iamthefij@gmail.com \
+    --domains="*.iamthefij.com" \
+    --dns="cloudflare" \
+    $arg
+
+# chmod +x ${NOMAD_TASK_DIR}/nomad
+
+# ${NOMAD_TASK_DIR}/nomad var list
+sleep 1000
+EOH
+        destination = "${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
+      }
+    }
+  }
+}
diff --git a/core/lego.tf b/core/lego.tf
new file mode 100644
index 0000000..a38fd90
--- /dev/null
+++ b/core/lego.tf
@@ -0,0 +1,20 @@
+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"]
+    }
+  }
+}
+EOH
+  job_acl {
+    job_id = "lego/*"
+  }
+}
diff --git a/core/traefik/traefik.nomad b/core/traefik/traefik.nomad
index 8d2746a..c49d404 100644
--- a/core/traefik/traefik.nomad
+++ b/core/traefik/traefik.nomad
@@ -54,6 +54,12 @@ job "traefik" {
       sticky = true
     }
 
+    volume "certs" {
+      type = "host"
+      read_only = true
+      source = "certs"
+    }
+
     service {
       name = "traefik"
       provider = "nomad"
@@ -102,6 +108,12 @@ job "traefik" {
         }
       }
 
+      volume_mount {
+        volume = "certs"
+        destination = "/etc/traefik/certs"
+        read_only = true
+      }
+
       template {
         # Avoid conflict with TOML lists [[ ]] and Go templates {{ }}
         left_delimiter = "<<"
@@ -248,6 +260,16 @@ CF_ZONE_API_TOKEN={{ .domain_lego_dns }}
         change_mode = "noop"
       }
 
+      template {
+        data = <<EOH
+[[tls.certificates]]
+  certFile = "/etc/traefik/certs/_.thefij.rocks.crt"
+  keyFile = "/etc/traefik/certs/_.thefij.rocks.key"
+        EOH
+        destination = "local/config/conf/static-tls.toml"
+        change_mode = "noop"
+      }
+
       template {
         data = <<EOH
 [http.middlewares]