Add the monitor role

Signed-off-by: Xavi Hernandez <[email protected]>

playbooks/ansible/roles/monitor/tasks/start.yml

@@ -0,0 +1,15 @@
+---
+- name: Stop monitoring if enabled
+  include_tasks: stop.yml
+
+- name: Launch background sadc monitoring
+  shell:
+    executable: /bin/bash
+    cmd: >-
+      nohup /usr/lib64/sa/sadc -S XALL 1 </dev/null 2>/dev/null
+      > >(nohup xz - >{{ config.statedir }}/sadc_{{ name }}.xz 2>/dev/null) &
+      echo ${!} >/tmp/sadc.pid
+
+- name: Wait few seconds to monitor idle activity
+  pause:
+    seconds: 5

playbooks/ansible/roles/monitor/tasks/stop.yml

@@ -0,0 +1,20 @@
+---
+- name: Check if sadc is running
+  stat:
+    path: /tmp/sadc.pid
+    get_attributes: false
+    get_checksum: false
+    get_mime: false
+  register: sadc_pid
+
+- name: Stop sadc if running
+  when: sadc_pid.stat.exists
+  block:
+    - name: Wait few seconds to monitor idle activity
+      pause:
+        seconds: 5
+
+    - name: Stop sadc
+      shell:
+        executable: /bin/bash
+        cmd: "kill -TERM $(cat /tmp/sadc.pid) && rm -f /tmp/sadc.pid"

playbooks/hosts.update.yml

@@ -9,3 +9,4 @@
     - ansible/config.yml
   roles:
     - hosts.update
+    - monitor

playbooks/roles/monitor/tasks/main.yml

@@ -0,0 +1,21 @@
+---
+- name: Install sysstat
+  yum:
+    name: sysstat
+    state: latest
+
+- name: Disable sysstat service and timers
+  systemd:
+    name: "{{ item }}"
+    enabled: false
+    masked: true
+    state: stopped
+  loop:
+    - sysstat
+    - sysstat-collect.timer
+    - sysstat-summary.timer
+
+- name: Make sure statedir is present
+  file:
+    path: "{{ config.statedir }}"
+    state: directory