Merge "[prometheus] Allow custom alert rules to be configured."

ansible/roles/prometheus/handlers/main.yml

@@ -145,4 +145,5 @@
     - inventory_hostname in groups[service.group]
     - service.enabled | bool
     - config_json.changed | bool
+      or prometheus_alertmanager_confs.changed | bool
       or prometheus_container.changed | bool

ansible/roles/prometheus/tasks/config.yml

@@ -24,6 +24,32 @@
   notify:
     - Restart {{ item.key }} container
 
+- name: Find custom prometheus alert rules files
+  local_action:
+    module: find
+    path: "{{ node_custom_config }}/prometheus/"
+    pattern: "*.rules"
+  run_once: True
+  register: prometheus_alert_rules
+  when:
+    - enable_prometheus_alertmanager | bool
+
+- name: Copying over custom prometheus alert rules files
+  vars:
+    service: "{{ prometheus_services['prometheus-server']}}"
+  copy:
+    src: "{{ item.path }}"
+    dest: "{{ node_config_directory }}/prometheus-server/{{ item.path | basename }}"
+    mode: "0660"
+  register: prometheus_confs
+  when:
+    - inventory_hostname in groups[service.group]
+    - service.enabled | bool and enable_prometheus_alertmanager | bool
+    - prometheus_alert_rules is defined and prometheus_alert_rules.files | length > 0
+  with_items: "{{ prometheus_alert_rules.files }}"
+  notify:
+    - Restart prometheus-server container
+
 - name: Copying over prometheus config file
   vars:
     service: "{{ prometheus_services['prometheus-server']}}"
@@ -47,7 +73,7 @@
   template:
     src: "{{ item }}"
     dest: "{{ node_config_directory }}/prometheus-alertmanager/prometheus-alertmanager.yml"
-  register: prometheus_confs
+  register: prometheus_alertmanager_confs
   when:
     - inventory_hostname in groups[service.group]
     - service.enabled | bool

ansible/roles/prometheus/templates/prometheus-server.json.j2

@@ -7,6 +7,15 @@
             "owner": "prometheus",
             "perm": "0600"
         }
+{% if enable_prometheus_alertmanager %}
+        ,{
+            "source": "{{ container_config_directory }}/*.rules",
+            "dest": "/etc/prometheus/",
+            "optional": true,
+            "owner": "prometheus",
+            "perm": "0600"
+        }
+{% endif %}
     ],
     "permissions": [
         {

ansible/roles/prometheus/templates/prometheus.yml.j2

@@ -5,6 +5,13 @@ global:
   external_labels:
     monitor: 'kolla'
 
+{% if prometheus_alert_rules is defined and prometheus_alert_rules.files | length  > 0 %}
+rule_files:
+{% for rule in prometheus_alert_rules.files %}
+  - "/etc/prometheus/{{ rule.path | basename }}"
+{% endfor %}
+{% endif %}
+
 scrape_configs:
   - job_name: prometheus
     static_configs: