bundles/postgresql: improvements

- support other postgresql versions
- manage configs using bw

bundles/postgresql/items.py

@@ -1,19 +1,56 @@
+postgresql_version = node.metadata['postgresql']['version']
+
 pkg_apt = {
-    'postgresql-11': {},
-    'postgresql-client-11': {},
-    'postgresql-server-dev-11': {},
+    'postgresql-common': {},
+    'postgresql-client-common': {},
+    'postgresql-{}'.format(postgresql_version): {},
+    'postgresql-client-{}'.format(postgresql_version): {},
+    'postgresql-server-dev-{}'.format(postgresql_version): {},
 }
 
 if node.has_bundle('zfs'):
-    pkg_apt['postgresql-11']['needs'] = {
-        'zfs_dataset:tank/postgresql',
-    }
-    pkg_apt['postgresql-client-11']['needs'] = {
-        'zfs_dataset:tank/postgresql',
-    }
-    pkg_apt['postgresql-server-dev-11']['needs'] = {
-        'zfs_dataset:tank/postgresql',
-    }
+    for pkgname, pkgconfig in pkg_apt.items():
+        pkg_apt[pkgname]['needs'] = {
+            'zfs_dataset:tank/postgresql',
+        }
+
+
+directories = {
+    '/etc/postgresql': {
+        'owner': None,
+        'group': None,
+        'mode': None,
+        # Keeping old configs messes with cluster-auto-detection.
+        'purge': True,
+    },
+    # This is needed so the above purge does not remove the version
+    # currently installed.
+    '/etc/postgresql/{}'.format(postgresql_version): {
+        'owner': None,
+        'group': None,
+        'mode': None,
+    },
+}
+
+files = {
+    "/etc/postgresql/{}/main/pg_hba.conf".format(postgresql_version): {
+        'content_type': 'mako',
+        'owner': 'postgres',
+        'group': 'postgres',
+        'triggers': {
+            'svc_systemd:postgresql:restart',
+        },
+    },
+    "/etc/postgresql/{}/main/postgresql.conf".format(postgresql_version): {
+        'content_type': 'mako',
+        'context': node.metadata['postgresql'],
+        'owner': 'postgres',
+        'group': 'postgres',
+        'triggers': {
+            'svc_systemd:postgresql:restart',
+        },
+    },
+}
 
 postgres_roles = {
     'root': {