Add DATA_SOURCE_NAME auth support.

* Add ENV-based `DATA_SOURCE_NAME` authentication config.
* Update default version to current release.

Signed-off-by: Ben Kochie <superq@gmail.com>

Author: SuperQ

defaults/main.yml

@@ -1,7 +1,9 @@
 ---
-mysqld_exporter_version: 0.16.0
+mysqld_exporter_version: 0.11.0
 mysqld_exporter_web_listen_address: "0.0.0.0:9104"
 
+mysqld_exporter_dsn: "exporter:password@(localhost:3306)/"
+
 mysqld_exporter_my_cnf: ""
 
 mysqld_exporter_collect: []

tasks/main.yml

@@ -1,13 +1,13 @@
 ---
 - include: preflight.yml
 
-- name: Create the Node Exporter group
+- name: Create the MySQL Exporter group
   group:
     name: "{{ __mysqld_exporter_group }}"
     state: present
     system: true
 
-- name: Create the Node Exporter user
+- name: Create the MySQL Exporter user
   user:
     name: "{{ __mysqld_exporter_user }}"
     groups: "{{ __mysqld_exporter_group }}"
@@ -43,7 +43,7 @@
   copy:
     src: "/tmp/mysqld_exporter-{{ mysqld_exporter_version }}.linux-{{ go_arch_map[ansible_architecture] | default(ansible_architecture) }}/mysqld_exporter"
     dest: "/usr/local/bin/mysqld_exporter"
-    mode: 0750
+    mode: 0755
     owner: root
     group: root
   notify:

templates/mysqld_exporter.service.j2

@@ -6,6 +6,9 @@ After=network.target
 Type=simple
 User={{ __mysqld_exporter_user }}
 Group={{ __mysqld_exporter_group }}
+{% if mysqld_exporter_dsn != "" %}
+Environment="DATA_SOURCE_NAME={{ mysqld_exporter_dsn }}"
+{% endif %}
 ExecStart=/usr/local/bin/mysqld_exporter \
     --web.listen-address {{ mysqld_exporter_web_listen_address }} \
     {% for c in mysqld_exporter_collect -%}