[apache] Add Prometheus exporter

Signed-off-by: Yohann D'ANELLO <ynerant@crans.org>

group_vars/apache.yml

@@ -0,0 +1,3 @@
+---
+glob_prometheus_apache_exporter:
+  listen_addr: "{{ query('ldap', 'ip', ansible_hostname, 'adm') | ansible.utils.ipv4 | first }}"

group_vars/bind.yml

@@ -1,3 +1,3 @@
 ---
-glob_prometheus_nginx_exporter:
+glob_prometheus_bind_exporter:
   listen_addr: "{{ query('ldap', 'ip', ansible_hostname, 'adm') | ansible.utils.ipv4 | first }}"

group_vars/nginx.yml

@@ -30,3 +30,6 @@ glob_nginx:
     - "172.16.0.0/16"
     - "fd00::/56"
   deploy_robots_file: false
+
+glob_prometheus_nginx_exporter:
+  listen_addr: "{{ query('ldap', 'ip', ansible_hostname, 'adm') | ansible.utils.ipv4 | first }}"

host_vars/fyre.adm.crans.org.yml

@@ -32,6 +32,19 @@ loc_prometheus:
             target_label: __address__
             replacement: '$1:9117'
 
+  apache:
+    config:
+      - job_name: apache
+        file_sd_configs:
+          - files:
+              - '/etc/prometheus/targets/apache.json'
+        relabel_configs:
+          - source_labels: [__address__]
+            target_label: instance
+          - source_labels: [instance]
+            target_label: __address__
+            replacement: '$1:9117'
+
   blackbox:
     file: targets_blackbox.json
     targets:

hosts

@@ -3,6 +3,9 @@
 [adh_server]
 zamok.adm.crans.org
 
+[apache]
+zamok.adm.crans.org
+
 [arpproxy]
 boeing.adm.crans.org
 routeur-ft.adm.crans.org

plays/monitoring.yml

@@ -48,6 +48,13 @@
   roles:
     - prometheus-nginx-exporter
 
+# Export apache metrics
+- hosts: apache
+  vars:
+    prometheus_apache_exporter: "{{ glob_prometheus_apache_exporter | default({}) | combine(loc_prometheus_apache_exporter | default({})) }}"
+  roles:
+    - prometheus-apache-exporter
+
 # Monitor Bird metrics
 - hosts: bird
   vars:

roles/prometheus-apache-exporter/tasks/main.yml

@@ -1,5 +1,5 @@
 ---
-- name: Install prometheus-apache-exporter
+- name: Install Prometheus apache-exporter
   apt:
     update_cache: true
     name: prometheus-apache-exporter
@@ -7,10 +7,10 @@
   retries: 3
   until: apt_result is succeeded
 
-- name: Make prometheus-apache-exporter listen on adm only
+- name: Make Prometheus apache-exporter listen on adm only
   lineinfile:
     path: /etc/default/prometheus-apache-exporter
-    regexp: '^ARGS='
+    regexp: ^ARGS=
     line: |
-      ARGS="-telemetry.address={{ adm_ipv4 }}:9117"
+      ARGS="-telemetry.address={{ prometheus_apache_exporter.listen_addr }}:9117"
   notify: Restart prometheus-apache-exporter