Implemented option to disable handlers (#12)

* Implemented option to disable handlers

* Added condition to execute HAProxy handler

Author: danopt

defaults/main.yml

@@ -12,6 +12,8 @@ patroni_config_file: "{{ inventory_hostname }}.yml"
 patroni_system_user: postgres
 patroni_system_group: postgres
 
+patroni_handlers_disable: false
+
 # create a backup file before copying files on hosts
 patroni_backup_on_copy: true
 

tasks/configure.yml

@@ -46,8 +46,16 @@
     owner: "{{ patroni_system_user }}"
     group: "{{ patroni_system_group }}"
     mode: 0600
+  register: patroni_config
+
+- name: Check if Patroni handler has to be executed
+  debug:
+    msg: "Patroni config file was changed, handler will be triggered."
   notify:
     - restart patroni
+  when:
+    - patroni_config.changed | bool and
+      not patroni_handlers_disable | bool
 
 - name: Create haproxy configuration file
   template:
@@ -56,6 +64,15 @@
     owner: root
     group: root
     mode: 0644
+  register: haproxy_config
+  when: patroni_install_haproxy
+
+- name: Check if HAProxy handler has to be executed
+  debug:
+    msg: "HAProxy config file was changed, handler will be triggered."
   notify:
     - restart haproxy
-  when: patroni_install_haproxy
+  when:
+    - patroni_install_haproxy and
+      haproxy_config.changed | bool and
+      not patroni_handlers_disable | bool

tasks/main.yml

@@ -8,6 +8,7 @@
   tags: [patroni, patroni-configure]
 
 - meta: flush_handlers
+  when: not patroni_handlers_disable | bool
 
 - name: Ensure patroni is running
   systemd:

tasks/watchdog.yml

@@ -20,8 +20,16 @@
     owner: root
     group: root
     mode: 0644
+  register: patroni_watchdog_config
+
+- name: Check if watchdog handler has to be executed
+  debug:
+    msg: "Watchdog config file was changed, handler will be triggered."
   notify:
     - restart patroni-watchdog
+  when:
+    - patroni_watchdog_config.changed | bool and
+      not patroni_handlers_disable | bool
 
 # Dirty hack. See https://bugs.launchpad.net/ubuntu/+source/watchdog/+bug/1448924
 - name: Enable watchdog daemon to start on boot