Added mysql/maria-exporter + dashboard.

group_vars/all/plain.yml

@@ -26,7 +26,7 @@ hetzner_ssh_keys:
   - peter.heise@netgo.de
   - claus.paetow@netgo.de
   - alexander.gordon@netgo.de
-  
+
 hetzner_server_labels: "stage={{ stage }}"
 
 admin_user: "root"
@@ -47,7 +47,7 @@ sudo_groups: [
 ]
 sudo_group: "{{ sudo_groups
   | selectattr('id', 'match', '' + ansible_distribution + '' )
-  | map(attribute='sudo_group') 
+  | map(attribute='sudo_group')
   | list
   | first
   | replace('.','-') }}"
@@ -101,6 +101,7 @@ monitor_port_system: "9082"
 monitor_port_docker: "9083"
 monitor_port_elastic: "9084"
 monitor_port_harbor: "9085"
+monitor_port_maria: "9086"
 monitor_port_awx: "80"
 
 admin_port_traefik: "9080"

roles/maria/tasks/main.yml

@@ -23,6 +23,13 @@
   with_items:
     - mariadb-server
     - python3-pymysql
+    - prometheus-mysqld-exporter
+
+- name: Stop prometheus-mysqld-exporter
+  service:
+    name: prometheus-mysqld-exporter
+    state: stopped
+    enabled: no
 
 - name: Fix binding..
   ansible.builtin.lineinfile:
@@ -75,6 +82,33 @@
     host: "{{ item.host }}"
   with_items: "{{ mysql_users }}"
 
+- name: Ensure prometheus user for prometheus-mysqld-exporter exists
+  community.mysql.mysql_user:
+    name: "prometheus"
+    priv: "*.*:PROCESS,REPLICATION CLIENT,SELECT"
+    config_file: "/etc/mysql/mariadb.conf.d/50-client.cnf"
+    login_password: "{{ mysql_root_password }}"
+
+- name: Ensure is prometheus-mysqld-exporter configured
+  lineinfile:
+    regex: "^DATA_SOURCE_NAME="
+    line: 'DATA_SOURCE_NAME="prometheus@unix(/run/mysqld/mysqld.sock)/"'
+    path: /etc/default/prometheus-mysqld-exporter
+  register: mysql_exporter_data_source
+
+- name: Setup prometheus-mysqld-exporter interface bind
+  lineinfile:
+    path: /etc/default/prometheus-mysqld-exporter
+    regex: "^ARGS="
+    line: "ARGS=\"--web.listen-address='{{ stage_private_server_ip }}:{{ monitor_port_maria }}'\""
+  register: mysql_exporter_args
+
+- name: Start prometheus-mysqld-exporter if needed
+  service:
+    name: prometheus-mysqld-exporter
+    state: started
+    enabled: yes
+
 - name: "Send mattermost messsge"
   uri:
     url: "{{ mattermost_hook_smardigo }}"

templates/prometheus/config/prometheus/prometheus.yml.j2

@@ -298,3 +298,28 @@ scrape_configs:
         regex:         (.*):.*
         target_label:  instance
         replacement:   $1
+
+  - job_name: 'maria-exporter'
+    scheme: http
+    metrics_path: '/metrics'
+    static_configs:
+      - targets: [
+{% for host in server_group_names_maria | default([]) %}
+          '{{ (stage_server_infos | selectattr("name", "equalto", host) | first).private_ip }}:{{ monitor_port_maria }}!{{ host }}.{{ domain }}',
+{% endfor %}
+        ]
+        labels:
+          env: {{ stage }}
+          project: smardigo
+    relabel_configs:
+      - source_labels: [job]
+        target_label:  job
+        replacement:   'maria-exporter'
+      - source_labels: [__address__]
+        regex:         .*!(.*)
+        target_label:  instance
+        replacement:   $1
+      - source_labels: [__address__]
+        regex:         (.*)!.*
+        target_label:  __address__
+        replacement:   $1