add MariaDB role

roles/mariadb/tasks/mysqld_exporter.yml

@@ -0,0 +1,50 @@
+---
+
+- name: Get latest mysqld_exporter version
+  github_release:
+    user: prometheus
+    repo: mysqld_exporter
+    action: latest_release
+    token: "{{ vault_github_token }}"
+  delegate_to: localhost
+  run_once: true
+  register: mysqld_exporter_version
+- name: "{{ mysqld_exporter_version }}"
+  set_fact:
+    mysqld_exporter_version: "{{ mysqld_exporter_version | replace ('v', '', 1) | trim }}"
+  run_once: true
+
+- name: download mysqld_exporter {{ mysqld_exporter_version.tag }} from GitHub
+  get_url:
+    url: "https://github.com/prometheus/mysqld_exporter/releases/download/\
+          v{{ mysqld_exporter_version.tag }}/mysqld_exporter-{{ mysqld_exporter_version.tag }}\
+          .linux-{{ deb_architecture }}.tar.gz"
+    dest: "/tmp/mysqld_exporter-{{ mysqld_exporter_version.tag }}.linux-{{ deb_architecture }}.tar.gz"
+  register: _download_archive
+  until: _download_archive is succeeded
+  retries: 3
+  delay: 5
+
+- name: unpack mysqld_exporter binaries
+  unarchive:
+    src: "/tmp/mysqld_exporter-{{ mysqld_exporter_version.tag }}.linux-{{ deb_architecture }}.tar.gz"
+    dest: "/tmp"
+    creates: "/tmp/mysqld_exporter-{{ mysqld_exporter_version.tag }}.linux-{{ deb_architecture }}"
+    remote_src: true
+
+- name: Copy mysqld_exporter
+  copy:
+    src: "/tmp/mysqld_exporter-{{ mysqld_exporter_version.tag }}.linux-{{ deb_architecture }}/mysqld_exporter"
+    dest: "{{ mysqld_exporter_install_dir }}/mysqld_exporter"
+    remote_src: true
+    mode: 0755
+  notify: restart mysqld_exporter
+
+- name: Copy the mysqld_exporter systemd service file
+  template:
+    src: mysqld_exporter.service.j2
+    dest: /etc/systemd/system/mysqld_exporter.service
+    owner: root
+    group: root
+    mode: 0644
+  notify: restart mysqld_exporter