Configure Prometheus and Prometheus federate to scrape Postgres Exporter

monitoring.yml

@@ -99,6 +99,9 @@
     prometheus_targets:
       - targets: |
           {{ groups['aurore_pve'] + groups['aurore_vm'] | list | sort }}
+    prometheus_postgres_targets:
+      - targets: 
+        - bdd.adm.auro.re
     prometheus_switch_snmp_targets:
       - targets:
           - yggdrasil.switch.auro.re
@@ -128,6 +131,9 @@
     prometheus_targets:
       - targets: |
           {{ groups['ovh_pve'] + groups['ovh_vm'] | list | sort }}
+    prometheus_postgres_targets:
+      - targets: 
+        - bdd-ovh.adm.auro.re
     prometheus_docker_targets:
       - docker-ovh.adm.auro.re:8087
   roles:

roles/prometheus/tasks/main.yml

@@ -75,6 +75,13 @@
     mode: 0644
   when: prometheus_docker_targets is defined
 
+- name: Configure Prometheus postgres monitoring
+  copy:
+    content: "{{ prometheus_postgres_targets | to_nice_json }}\n"
+    dest: /etc/prometheus/targets_postgres.json
+    mode: 0644
+  when: prometheus_postgres_targets is defined
+
 - name: Activate prometheus service
   systemd:
     name: prometheus
@@ -88,4 +95,3 @@
       - key: 05-prometheus
         message: >-
           Prometheus est déployé sur cette machine (voir /etc/prometheus)
-...

roles/prometheus/templates/prometheus.yml.j2

@@ -101,4 +101,18 @@ scrape_configs:
     file_sd_configs:
       - files:
         - '/etc/prometheus/targets_docker.json'
+
+  - job_name: postgresql
+    file_sd_configs:
+      - files:
+        - '/etc/prometheus/targets_postgres.json'
+    relabel_configs:
+      # Do not put :9187 in instance name, rather here
+      - source_labels: [__address__]
+        target_label: __param_target
+      - source_labels: [__param_target]
+        target_label: instance
+      - source_labels: [__param_target]
+        target_label: __address__
+        replacement: '$1:9187'
 ...

roles/prometheus_federate/templates/prometheus.yml.j2

@@ -31,6 +31,7 @@ scrape_configs:
     params:
       match[]:
         - '{job="servers"}'
+        - '{job="postgresql"}'
         - '{job="prometheus"}'
         - '{job="unifi_snmp"}'
         - '{job="django"}'