r/synapse: Increase service startup timeout

The Synapse server can sometimes take a very long time to start.
Increasing the start timeout should keep it from failing to come up when
the machine is under load.

roles/synapse/files/timeout-start.conf

@@ -0,0 +1,4 @@
+# Synapse can sometimes take a very long time to start, especially if
+# the machine is under load.
+[Service]
+TimeoutStartSec=5min

roles/synapse/handlers/main.yml

@@ -1,3 +1,7 @@
+- name: reload systemd
+  systemd:
+    daemon_reload: true
+
 - name: restart synapse
   listen: certificate changed
   service:

roles/synapse/tasks/main.yml

@@ -43,6 +43,27 @@
   - selinux
   - seboolean
 
+- name: ensure synapse.service drop-in configuration directory exists
+  file:
+    path: /etc/systemd/system/synapse.service.d
+    owner: root
+    group: root
+    mode: u=rwx,go=rx
+    state: directory
+  tags:
+  - systemd
+- name: ensure synapse service timeout is set
+  copy:
+    src: timeout-start.conf
+    dest: /etc/systemd/system/synapse.service.d/timeout-start.conf
+    owner: root
+    group: root
+    mode: u=rw,go=r
+  tags:
+  - systemd
+  notify:
+  - reload systemd
+
 - name: ensure synapse starts at boot
   service:
     name: synapse