Deploy backup jobs to all hosts and dynamically determine jobs per node

nomad/backups/backup.nomad

@@ -5,10 +5,15 @@ variable "nextcloud_backup" {
 
 job "backup" {
   datacenters = ["dc1"]
-  type = "service"
+  type = "system"
 
-  group "nomad0" {
+  constraint {
-    count = 1
+    attribute = "${node.unique.name}"
+    # Only node with a backup job so far
+    value = "n2"
+  }
+
+  group "backup" {
 
     network {
       mode = "bridge"
@@ -18,22 +23,10 @@ job "backup" {
       }
     }
 
-    volume "nextcloud-data" {
+    volume "all-volumes" {
       type = "host"
       read_only = true
-      source = "nextcloud-data"
+      source = "all-volumes"
-    }
-
-    volume "gitea-data" {
-      type = "host"
-      read_only = true
-      source = "gitea-data"
-    }
-
-    volume "authentik-data" {
-      type = "host"
-      read_only = true
-      source = "authentik-data"
     }
 
     service {
@@ -73,20 +66,8 @@ job "backup" {
       driver = "docker"
 
       volume_mount {
-        volume = "nextcloud-data"
+        volume = "all-volumes"
-        destination = "/data/nextcloud"
+        destination = "/data"
-        read_only = true
-      }
-
-      volume_mount {
-        volume = "gitea-data"
-        destination = "/data/gitea"
-        read_only = true
-      }
-
-      volume_mount {
-        volume = "authentik-data"
-        destination = "/data/authentik"
         read_only = true
       }
 
@@ -94,7 +75,7 @@ job "backup" {
         image = "iamthefij/resticscheduler"
         ports = ["metrics"]
         args = [
-          "/jobs/nextcloud.hcl",
+          "/jobs/node-jobs.hcl",
         ]
 
         mount {
@@ -117,8 +98,15 @@ job "backup" {
       }
 
       template {
-        data = var.nextcloud_backup
+        data = <<EOF
-        destination = "jobs/nextcloud.hcl"
+# Current node is {{ env "node.unique.name" }}
+{{ range service "nextcloud" }}
+# Nextcloud .Node {{ .Node }}
+{{ if eq .Node (env "node.unique.name") }}
+${var.nextcloud_backup}
+{{ end }}{{ end }}
+        EOF
+        destination = "jobs/node-jobs.hcl"
       }
 
       resources {

nomad/setup-cluster.yml

@@ -205,6 +205,12 @@
         group: "root"
         mode: "0777"
         read_only: true
+      - name: all-volumes
+        path: /srv/volumes
+        owner: "root"
+        group: "root"
+        mode: "0777"
+        read_only: false
 
   roles:
     - name: ansible-nomad