add mysql exporter install playbook

linux/debian/files/mysqld_exporter.service

+[Unit]
+Description=MySQL Metrics Exporter for Prometheus
+After=network.target
+Wants=network-online.target
+
+[Service]
+Restart=always
+Type=simple
+User=mysql
+ExecStart=/usr/local/bin/mysqld_exporter
+Environment=
+
+[Install]
+WantedBy=multi-user.target
\ No newline at end of file

linux/debian/install-mysql-exporter.yml

+- name: Install Prometheus node exporter
+  hosts: all
+  vars:
+    mysqld_exporter_version: 1.15.1
+    arch: "{% if ansible_architecture == 'x86_64' %}amd64{% elif ansible_architecture == 'aarch64' %}arm64{% endif %}"
+  tasks:
+    - name: uninstall mysqld-exporter package
+      apt:
+        name: prometheus-mysqld-exporter
+        state: absent
+        purge: yes
+        autoremove: yes
+    - name: download mysqld-exporter release
+      get_url:
+        url: "https://github.com/prometheus/mysqld_exporter/releases/download/v{{ mysqld_exporter_version }}/mysqld_exporter-{{ mysqld_exporter_version }}.linux-{{ arch }}.tar.gz"
+        dest: /tmp/mysqld_exporter.tar.gz
+    - name: extract mysqld-exporter release
+      unarchive:
+        src: /tmp/mysqld_exporter.tar.gz
+        dest: /tmp
+        remote_src: yes
+    - name: delete old binary if exists
+      file:
+        path: /usr/local/bin/mysqld_exporter
+        state: absent
+    - name: move mysqld-exporter binary
+      shell: cp /tmp/mysqld_exporter-{{ mysqld_exporter_version }}.linux-{{ arch }}/mysqld_exporter /usr/local/bin/mysqld_exporter
+    - name: install systemd-service
+      copy:
+        src: files/mysqld_exporter.service
+        dest: /etc/systemd/system/mysqld_exporter.service
+        mode: 0644
+    - name: reload systemd
+      systemd:
+        daemon_reload: yes
+    - name: enable mysqld-exporter service
+      systemd:
+        name: mysqld_exporter
+        enabled: yes
+        state: started
+    - name: delete temporary files
+      file:
+        path: /tmp/mysqld_exporter*
+        state: absent
+    - name: check mysqld-exporter status
+      uri:
+        url: http://localhost:9104/metrics
+        status_code: 200
+        timeout: 5
+        return_content: yes
+      register: mysqld_exporter_status
+      until: mysqld_exporter_status.status == 200
+      retries: 5
+      delay: 5
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