WIP: Write a consul backup job

nomad/backups/jobs/consul.hcl

@@ -0,0 +1,45 @@
+job "Consul" {
+  schedule = "0 0 * * *"
+
+  config {
+    # TODO: Backup to a meaningful location, this is just for testing
+    repo = "/local/repo"
+    # Read from secret file
+    passphrase = env("BACKUP_PASSPHRASE")
+  }
+
+  # Remove when using a proper backup destination
+  task "Create dir for repo" {
+    pre_script {
+      on_backup = "echo 'Backing up something'"
+    }
+    pre_script {
+      on_backup = "mkdir -p /local/repo"
+    }
+  }
+
+  task "Use consul snapshots" {
+    pre_script {
+      on_backup = "mkdir -p /local/consul"
+    }
+    pre_script {
+      on_backup = "consul snapshot save /local/consul/backup.snap"
+    }
+    post_script {
+      on_restore = "consul snapshot restore /local/consul/backup.snap"
+    }
+  }
+
+  backup {
+    paths = ["/local/consul"]
+    # Because path is absolute
+    restore_opts {
+      Target = "/"
+    }
+  }
+
+  forget {
+    KeepLast = 2
+    Prune = true
+  }
+}