pmie - restart the pmie service if the configuration tasks made any changes.

Author: nhosoi

roles/pcp/tasks/pmie.yml

@@ -9,6 +9,7 @@
     group: root
     mode: 0755
   loop: "{{ __pcp_pmieconf_groups|default([]) }}"
+  register: __pcp_register_changed_group_dir
 
 - name: Ensure extra performance rule group link directories exist
   file:
@@ -18,6 +19,7 @@
     group: root
     mode: 0755
   loop: "{{ __pcp_pmieconf_groups|default([]) }}"
+  register: __pcp_register_changed_group_link_dir
 
 - name: Ensure extra performance rules are installed for targeted hosts
   copy:
@@ -27,6 +29,7 @@
     group: root
     mode: '0644'
   loop: "{{ __pcp_pmieconf_rules|default([]) }}"
+  register: __pcp_register_changed_rules_for_hosts
 
 - name: Ensure extra rules symlinks have been created for targeted hosts
   file:
@@ -35,14 +38,15 @@
     state: link
     force: yes
   loop: "{{ __pcp_pmieconf_rules|default([]) }}"
+  register: __pcp_register_changed_symlinks_for_hosts
 
 - name: Enable performance metric inference for targeted hosts (with control.d)
   template:
     src: pmie.controld.j2
     dest: "{{ __pcp_pmie_control_d_path }}/{{ item }}"
     mode: 0644
   loop: "{{ pcp_target_hosts|default([]) }}"
-  notify: restart pmie
+  register: __pcp_register_changed_target_hosts_controld
   when:
     - not pcp_single_control|d(false)|bool
     - pcp_target_hosts|d([])
@@ -52,13 +56,32 @@
     src: pmie.control.j2
     dest: "{{ __pcp_pmie_control_path }}"
     mode: 0644
-  notify: restart pmie
+  register: __pcp_register_changed_target_hosts_single
   when:
     - pcp_single_control|d(true)|bool
     - pcp_target_hosts|d([])
 
+- name: Set variable to do pmie restart if needed
+  set_fact:
+    __pcp_restart_pmie: "{{
+      __pcp_register_changed_group_dir is changed or
+      __pcp_register_changed_group_link_dir is changed or
+      __pcp_register_changed_rules_for_hosts is changed or
+      __pcp_register_changed_symlinks_for_hosts is changed or
+      __pcp_register_changed_target_hosts_controld is changed or
+      __pcp_register_changed_target_hosts_single is changed
+    }}"
+
 - name: Ensure performance metric inference is running and enabled on boot
   service:
     name: pmie
     state: started
     enabled: yes
+  when: not __pcp_restart_pmie | bool
+
+- name: Ensure performance metric inference is restarted and enabled on boot
+  service:
+    name: pmie
+    state: restarted
+    enabled: yes
+  when: __pcp_restart_pmie | bool