Enable mysqld_exporter for prometheus hosts

hosts.yml

@@ -96,6 +96,8 @@ print:
 prometheus:
   hosts:
     prometheus02.home.foo.sh:
+  vars:
+    mysqld_exporter_version: "0.15.1"
 proxy:
   hosts:
     proxy01.home.foo.sh:

playbooks/prometheus.yml

@@ -26,3 +26,4 @@
   roles:
     - base
     - prometheus
+    - mysqld_exporter

roles/prometheus/templates/prometheus.yml.j2

@@ -10,6 +10,25 @@ scrape_configs:
       - targets:
         - "127.0.0.1:9090"
 
+  - job_name: mysqld
+    scheme: https
+    tls_config:
+      ca_file: "{{ tls_certs }}/ca.crt"
+      key_file: "{{ tls_private }}/{{ inventory_hostname }}.key"
+      cert_file: "{{ tls_certs }}/{{ inventory_hostname }}.crt"
+    static_configs:
+      - targets:
+{% for host in groups['sqldb'] %}
+        - {{ host }}:3306
+{% endfor %}
+    relabel_configs:
+      - source_labels: [__address__]
+        target_label: __param_target
+      - source_labels: [__param_target]
+        target_label: instance
+      - target_label: __address__
+        replacement: {{ inventory_hostname }}:9104
+
   - job_name: snmp
     scheme: https
     tls_config: