Add monit monitoring

defaults/main.yml

@@ -1,2 +1,3 @@
 ---
+apache_check_memory_limit: 500.0 MB
 dhparams_path: /etc/ssl/dhparams.pem

handlers/main.yml

@@ -13,3 +13,8 @@
   ansible.builtin.service:
     name: munin-node
     state: restarted
+
+- name: reload monit
+  ansible.builtin.service:
+    name: monit
+    state: reloaded

tasks/monitoring.yml

@@ -24,7 +24,7 @@
     mode: 0644
   notify: restart munin-node
 
-- name: "Mpnitoring | Enable Munin plugins"
+- name: "Monitoring | Enable Munin plugins"
   ansible.builtin.file:
     src: "/usr/share/munin/plugins/{{ item }}"
     dest: "/etc/munin/plugins/{{ item }}"
@@ -34,3 +34,10 @@
     - apache_processes
     - apache_volume
   notify: restart munin-node
+
+- name: "Monitoring | Enable Monit configuration"
+  ansible.builtin.template:
+    src: monit.conf
+    dest: /etc/monit/conf-enabled/apache2
+    mode: 0644
+  notify: reload monit

templates/monit.conf

@@ -0,0 +1,11 @@
+# Ansible managed
+
+check process apache with pidfile /run/apache2/apache2.pid
+  group webserver
+  start program = "/usr/sbin/service apache2 start" with timeout 60 seconds
+  stop program  = "/usr/sbin/service apache2 stop"
+  if cpu > 60% for 2 cycles then alert
+  if cpu > 80% for 5 cycles then restart
+  if totalmem > {{ apache_check_overrides.memory_limit | default(apache_check_memory_limit) }} for 3 cycles then restart
+  if children > 250 then restart
+  if 3 restarts within 5 cycles then timeout