Install postgres exporter

monitoring.yml

@@ -151,6 +151,11 @@
   roles:
     - prometheus_federate
 
+#Postgres Exporters
+- hosts: bdd.adm.auro.re,bdd-ovh.adm.auro.re
+  roles:
+    - prometheus_postgres
+
 
 # Monitor all hosts
 - hosts: all,!edc_unifi,!fleming_unifi,!pacaterie_unifi,!gs_unifi,!rives_unifi,!aurore_testing_vm,!ovh_container

roles/prometheus_postgres/handlers/main.yml

@@ -0,0 +1,5 @@
+---
+- name: Restart prometheus-postgres-exporter
+  service:
+    name: prometheus-postgres-exporter
+    state: restarted

roles/prometheus_postgres/tasks/main.yml

@@ -0,0 +1,41 @@
+---
+- name: Install Prometheus postgres-exporter
+  apt:
+    update_cache: true
+    name: prometheus-postgres-exporter
+  register: apt_result
+  retries: 3
+  until: apt_result is succeeded
+  when:
+    - ansible_lsb.codename == 'bullseye'
+
+- name: Make Prometheus postgres-exporter connect to databases using peercred
+  lineinfile:
+    path: /etc/default/prometheus-postgres-exporter
+    regexp: '^DATA_SOURCE_NAME='
+    line: |
+      DATA_SOURCE_NAME="user=postgres host=/var/run/postgresql/ sslmode=disable"
+  notify: Restart prometheus-postgres-exporter
+
+- name: Make Prometheus postgres-exporter launched by postgres user
+  lineinfile:
+    path: /lib/systemd/system/prometheus-postgres-exporter.service
+    regexp: '^User='
+    line: |
+      User=postgres
+  notify: Restart prometheus-postgres-exporter
+
+- name: Make Prometheus postgres-exporter listen on adm only
+  lineinfile:
+    path: /etc/default/prometheus-postgres-exporter
+    regexp: '^ARGS='
+    line: |
+      ARGS="--web.listen-address={{ ansible_hostname }}.adm.auro.re:9187"
+  notify: Restart prometheus-postgres-exporter
+
+- name: Activate prometheus-postgres-exporter service
+  systemd:
+    name: prometheus-postgres-exporter
+    enabled: true
+    daemon_reload: yes
+    state: started