matrix: Move IRC bridge state to PostgreSQL

roles/matrix/files/pg_hba.conf

+local  all       postgres                peer
+host   all       postgres  127.0.0.1/32  md5
+host   all       postgres  ::1/128       md5
+
+local  sameuser  all                     md5
+host   sameuser  all       127.0.0.1/32  md5
+host   sameuser  all       ::1/128       md5
+
+local  irc       synapse                 md5

roles/matrix/tasks/main.yml

@@ -17,7 +17,6 @@
   file: path={{ item }} state=directory owner=synapse group=synapse mode=0700
   with_items:
     - /var/lib/synapse
-    - /var/lib/synapse/irc-nedb
     - /var/lib/synapse/media_store
 
 - name: make virtualenv
@@ -62,6 +61,11 @@
   notify:
     - restart matrix-appservice-irc
 
+- name: install pg_hba.conf
+  copy: src=pg_hba.conf dest=/var/lib/postgres/data/pg_hba.conf owner=postgres group=postgres mode=0600
+  notify:
+    - restart postgres
+
 - name: add synapse postgres db
   postgresql_db: db=synapse
   become: yes
@@ -69,7 +73,13 @@
   become_method: su
 
 - name: add synapse postgres user
-  postgresql_user: db=synapse name=synapse password={{ vault_postgres_users.synapse }} encrypted=true
+  postgresql_user: db=synapse user=synapse password={{ vault_postgres_users.synapse }}
+  become: yes
+  become_user: postgres
+  become_method: su
+
+- name: add irc postgres db
+  postgresql_db: db=irc
   become: yes
   become_user: postgres
   become_method: su

roles/matrix/templates/irc-bridge.yaml.j2

@@ -497,8 +497,8 @@ sentry:
 # Use an external database to store bridge state.
 database:
   # database engine (must be 'postgres' or 'nedb'). Default: nedb
-  engine: "nedb"
+  engine: "postgres"
    # Either a PostgreSQL connection string, or a path to the NeDB storage directory.
    # For postgres, it must start with postgres://
    # For NeDB, it must start with nedb://. The path is relative to the project directory.
-  connectionString: "nedb:///var/lib/synapse/irc-nedb"
+  connectionString: "socket://synapse:{{ vault_postgres_users.synapse }}@/run/postgresql?db=irc"