left4dead2 servers on overlayfs

bundles/left4dead2/items.py

@@ -16,6 +16,13 @@ directories = {
         'group': 'steam',
         'purge': True,
     },
+    # Current zfs doesnt support zfs upperdir. The support was added in October 2022. Move upperdir - unused anyway -
+    # to another dir. Also move workdir alongside it, as it has to be on same fs.
+    '/opt/steam-zfs-overlay-workarounds': {
+        'owner': 'steam',
+        'group': 'steam',
+        'mode': '0744',
+    },
 }
 
 files = {
@@ -26,6 +33,10 @@ files = {
 }
 
 for name, config in node.metadata.get('left4dead2/servers').items():
+    directories[f'/opt/steam/left4dead2-servers/{name}'] = {}
+    directories[f'/opt/steam-zfs-overlay-workarounds/{name}/upper'] = {}
+    directories[f'/opt/steam-zfs-overlay-workarounds/{name}/workdir'] = {}
+
     files[f'/opt/steam/left4dead2/left4dead2/cfg/server/{name}.cfg'] = {
         'content_type': 'mako',
         'source': 'server.cfg',
@@ -46,7 +57,22 @@ for name, config in node.metadata.get('left4dead2/servers').items():
             f'file:/usr/local/lib/systemd/system/left4dead2-{name}.service',
         ],
     }
-
+    directories[f'/opt/steam/left4dead2-servers/{name}/left4dead2/addons'] = {
+        'owner': 'steam',
+        'group': 'steam',
+        'purge': True,
+    }
+    files[f'/opt/steam/left4dead2-servers/{name}/left4dead2/addons/readme.txt'] = {
+        'content_type': 'any',
+        'owner': 'steam',
+        'group': 'steam',
+    }
+    for id in node.metadata.get('left4dead2/workshop'):
+        files[f'/opt/steam/left4dead2-servers/{name}/left4dead2/addons/{id}.vpk'] = {
+            'content_type': 'any',
+            'owner': 'steam',
+            'group': 'steam',
+        }
 
 files[f'/opt/steam/left4dead2/left4dead2/addons/readme.txt'] = {
     'content_type': 'any',
@@ -54,7 +80,6 @@ files[f'/opt/steam/left4dead2/left4dead2/addons/readme.txt'] = {
     'group': 'steam',
 }
 
-
 for id in node.metadata.get('left4dead2/workshop'):
     files[f'/opt/steam/left4dead2/left4dead2/addons/{id}.vpk'] = {
         'content_type': 'any',

bundles/left4dead2/metadata.py

@@ -66,8 +66,8 @@ def server_units(metadata):
             'Service': {
                 'User': 'steam',
                 'Group': 'steam',
-                'WorkingDirectory': '/opt/steam/left4dead2',
+                'WorkingDirectory': f'/opt/steam/left4dead2-servers/{name}',
-                'ExecStart': f'/opt/steam/left4dead2/srcds_run -port {config["port"]} +exec server/{name}.cfg',
+                'ExecStart': f'/opt/steam/left4dead2-servers/{name}/srcds_run -port {config["port"]} +exec server/{name}.cfg',
                 'Restart': 'on-failure',
             },
             'Install': {
@@ -75,6 +75,32 @@ def server_units(metadata):
             },
         }
 
+        mountpoint = f'/opt/steam/left4dead2-servers/{name}'
+        formatted_name = mountpoint[1:].replace('-', '\\x2d').replace('/', '-') + '.mount'
+        units[formatted_name] = {
+            'Unit': {
+                'Description': f"Mount left4dead2 server {name} overlay",
+                'Conflicts': 'umount.target',
+                'Before': 'umount.target',
+            },
+            'Mount': {
+                'What': 'overlay',
+                'Where': mountpoint,
+                'Type': 'overlay',
+                'Options': ','.join([
+                    'auto',
+                    'lowerdir=/opt/steam/left4dead2',
+                    f'upperdir=/opt/steam-zfs-overlay-workarounds/{name}/upper',
+                    f'workdir=/opt/steam-zfs-overlay-workarounds/{name}/workdir',
+                ]),
+            },
+            'Install': {
+                'WantedBy': {
+                    'multi-user.target',
+                },
+            },
+        }
+
     return {
         'systemd': {
             'units': units,