From 1f3e76e4f6f99ca134fc1eadd9ddb02343b82b9d Mon Sep 17 00:00:00 2001
From: Timo Makinen <tmakinen@foo.sh>
Date: Sat, 17 Feb 2024 17:59:16 +0000
Subject: [PATCH] Enable mysqld_exporter for prometheus hosts

---
 hosts.yml                                    |  2 ++
 playbooks/prometheus.yml                     |  1 +
 roles/prometheus/templates/prometheus.yml.j2 | 19 +++++++++++++++++++
 3 files changed, 22 insertions(+)

diff --git a/hosts.yml b/hosts.yml
index 8fb7bd0..7e8fc7c 100644
--- a/hosts.yml
+++ b/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:
diff --git a/playbooks/prometheus.yml b/playbooks/prometheus.yml
index bec40ff..856b0a3 100644
--- a/playbooks/prometheus.yml
+++ b/playbooks/prometheus.yml
@@ -26,3 +26,4 @@
   roles:
     - base
     - prometheus
+    - mysqld_exporter
diff --git a/roles/prometheus/templates/prometheus.yml.j2 b/roles/prometheus/templates/prometheus.yml.j2
index e4a4956..49520f9 100644
--- a/roles/prometheus/templates/prometheus.yml.j2
+++ b/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: