bundles/docker-engine: fix backups and zfs dependencies

bundles/docker-engine/items.py

@@ -46,6 +46,10 @@ actions['docker_create_nondefault_network'] = {
 for app, config in node.metadata.get('docker-engine/containers', {}).items():
     volumes = config.get('volumes', {})
     user = config.get('user', f'docker-{app}')
+    directories[f'/var/opt/docker-engine/{app}'] = {
+        'owner': user,
+        'group': user,
+    }
 
     files[f'/opt/docker-engine/{app}'] = {
         'source': 'docker-wrapper',
@@ -97,6 +101,7 @@ for app, config in node.metadata.get('docker-engine/containers', {}).items():
     svc_systemd[f'docker-{app}'] = {
         'needs': {
             *deps,
+            f'directory:/var/opt/docker-engine/{app}',
             f'file:/opt/docker-engine/{app}',
             f'file:/usr/local/lib/systemd/system/docker-{app}.service',
             f'user:{user}',

bundles/docker-engine/metadata.py

@@ -13,11 +13,6 @@ defaults = {
             },
         },
     },
-    'backups': {
-        'paths': {
-            '/var/opt/docker-engine',
-        },
-    },
     'nftables': {
         'forward': {
             'docker-engine': [
@@ -39,9 +34,7 @@ defaults = {
     },
     'zfs': {
         'datasets': {
-            'tank/docker-data': {
-                'mountpoint': '/var/opt/docker-engine',
-            },
+            'tank/docker-data': {},
         },
     },
 }
@@ -72,6 +65,7 @@ def monitoring(metadata):
 
 
 @metadata_reactor.provides(
+    'backups/paths',
     'zfs/datasets',
 )
 def zfs(metadata):
@@ -79,10 +73,19 @@ def zfs(metadata):
 
     for app in metadata.get('docker-engine/containers', {}):
         datasets[f'tank/docker-data/{app}'] = {
-            'mountpoint': f'/var/opt/docker-engine/{app}'
+            'mountpoint': f'/var/opt/docker-engine/{app}',
+            'needed_by': {
+                f'directory:/var/opt/docker-engine/{app}',
+            },
         }
 
     return {
+        'backups': {
+            'paths': {
+                v['mountpoint']
+                for v in datasets.values()
+            },
+        },
         'zfs': {
             'datasets': datasets,
         },