refactor(mysqld_exporter): delegate common tasks to _common role

Signed-off-by: gardar <gardar@users.noreply.github.com>

roles/mysqld_exporter/defaults/main.yml

@@ -1,10 +1,8 @@
 ---
 mysqld_exporter_version: 0.15.1
-mysqld_exporter_binary_local_dir: ""
 mysqld_exporter_binary_url: "https://github.com/{{ _mysqld_exporter_repo }}/releases/download/v{{ mysqld_exporter_version }}/\
-                           mysqld_exporter-{{ mysqld_exporter_version }}.linux-{{ go_arch }}.tar.gz"
+                           mysqld_exporter-{{ mysqld_exporter_version }}.{{ ansible_system | lower }}-{{ _mysqld_exporter_go_ansible_arch }}.tar.gz"
 mysqld_exporter_checksums_url: "https://github.com/{{ _mysqld_exporter_repo }}/releases/download/v{{ mysqld_exporter_version }}/sha256sums.txt"
-mysqld_exporter_skip_install: false
 
 mysqld_exporter_web_listen_address: "0.0.0.0:9104"
 mysqld_exporter_web_telemetry_path: "/metrics"
@@ -36,4 +34,4 @@ mysqld_exporter_system_group: "mysqld-exp"
 mysqld_exporter_system_user: "{{ mysqld_exporter_system_group }}"
 
 # Local path to stash the archive and its extraction
-mysqld_exporter_archive_path: /tmp
+mysqld_exporter_local_cache_path: "/tmp/mysqld_exporter-{{ ansible_system | lower }}-{{ _mysqld_exporter_go_ansible_arch }}/{{ mysqld_exporter_version }}"

roles/mysqld_exporter/meta/argument_specs.yml

@@ -11,18 +11,9 @@ argument_specs:
       mysqld_exporter_version:
         description: "MySQLd exporter package version. Also accepts latest as parameter."
         default: "0.15.1"
-      mysqld_exporter_skip_install:
-        description: "MySQLd installation tasks gets skipped when set to true."
-        type: bool
-        default: false
-      mysqld_exporter_binary_local_dir:
-        description:
-          - "Enables the use of local packages instead of those distributed on github."
-          - "The parameter may be set to a directory where the C(mysqld_exporter) binary is stored on the host where ansible is run."
-          - "This overrides the I(mysqld_exporter_version) parameter"
       mysqld_exporter_binary_url:
         description: "URL of the mysqld_exporter binaries .tar.gz file"
-        default: "https://github.com/prometheus/{{ _mysqld_exporter_repo }}/download/v{{ mysqld_exporter_version }}/mysqld_exporter-{{ mysqld_exporter_version }}.linux-{{ go_arch }}.tar.gz"
+        default: "https://github.com/{{ _mysqld_exporter_repo }}/releases/download/v{{ mysqld_exporter_version }}/mysqld_exporter-{{ mysqld_exporter_version }}.{{ ansible_system | lower }}-{{ _mysqld_exporter_go_ansible_arch }}.tar.gz"
       mysqld_exporter_checksums_url:
         description: "URL of the mysqld_exporter checksums file"
         default: "https://github.com/{{ _mysqld_exporter_repo }}/releases/download/v{{ mysqld_exporter_version }}/sha256sums.txt"
@@ -33,7 +24,7 @@ argument_specs:
         description: "Path under which to expose metrics"
         default: "/metrics"
       mysqld_exporter_config_dir:
-        description: "The path where exporter configuration is stored"
+        description: "Path to directory with mysqld_exporter configuration"
         default: "/etc/mysqld_exporter"
       mysqld_exporter_config_file:
         description: "The filename of the exporter mysql config file"
@@ -91,6 +82,6 @@ argument_specs:
           - "I(Advanced)"
           - "MySQLd Exporter user"
         default: "mysqld-exp"
-      mysqld_exporter_archive_path:
-        description: 'Local path to stash the archive and its extraction'
-        default: "/tmp"
+      mysqld_exporter_local_cache_path:
+        description: "Local path to stash the archive and its extraction"
+        default: "/tmp/mysqld_exporter-{{ ansible_system | lower }}-{{ _mysqld_exporter_go_ansible_arch }}/{{ mysqld_exporter_version }}"

roles/mysqld_exporter/molecule/alternative/molecule.yml

@@ -5,7 +5,7 @@ provisioner:
   inventory:
     group_vars:
       all:
-        mysqld_exporter_binary_local_dir: "/tmp/mysqld_exporter-linux-amd64"
+        mysqld_exporter_local_cache_path: "/tmp/mysqld_exporter-linux-amd64"
         mysqld_exporter_web_listen_address:
           - '127.0.0.1:8080'
           - '127.0.1.1:8080'
@@ -20,8 +20,7 @@ provisioner:
           http2: true
         mysqld_exporter_basic_auth_users:
           randomuser: examplepassword
-        go_arch: amd64
         mysqld_exporter_version: 0.15.0
         mysqld_exporter_binary_url: "https://github.com/prometheus/mysqld_exporter/releases/download/v{{\
                                      \ mysqld_exporter_version }}/mysqld_exporter-{{ mysqld_exporter_version\
-                                     \ }}.linux-{{ go_arch }}.tar.gz"
+                                     \ }}.linux-amd64.tar.gz"

roles/mysqld_exporter/molecule/default/tests/test_default.py

@@ -46,7 +46,6 @@ def test_user(host):
     assert host.group("mysqld-exp").exists
     assert "mysqld-exp" in host.user("mysqld-exp").groups
     assert host.user("mysqld-exp").shell == "/usr/sbin/nologin"
-    assert host.user("mysqld-exp").home == "/"
 
 
 def test_service(host):

roles/mysqld_exporter/tasks/configure.yml

@@ -1,20 +1,19 @@
 ---
-- name: Copy the mysqld_exporter systemd service file
-  ansible.builtin.template:
-    src: mysqld_exporter.service.j2
-    dest: /etc/systemd/system/mysqld_exporter.service
-    owner: root
-    group: root
-    mode: '0644'
-  notify: restart mysqld_exporter
-
-- name: Create mysqld_exporter config directory
-  ansible.builtin.file:
-    path: "{{ mysqld_exporter_config_dir }}"
-    state: directory
-    owner: root
-    group: root
-    mode: u+rwX,g+rwX,o=rX
+- name: Configure
+  ansible.builtin.include_role:
+    name: prometheus.prometheus._common
+    tasks_from: configure.yml
+  vars:
+    _common_system_user: "{{ mysqld_exporter_system_user }}"
+    _common_system_group: "{{ mysqld_exporter_system_group }}"
+    _common_config_dir: "{{ mysqld_exporter_config_dir }}"
+    _common_tls_server_config: "{{ mysqld_exporter_tls_server_config }}"
+    _common_http_server_config: "{{ mysqld_exporter_http_server_config }}"
+    _common_basic_auth_users: "{{ mysqld_exporter_basic_auth_users }}"
+  tags:
+    - mysqld_exporter
+    - configure
+    - mysqld_exporter_configure
 
 - name: Copy the mysqld_exporter config file
   ansible.builtin.template:
@@ -24,29 +23,9 @@
     group: '{{ mysqld_exporter_system_group }}'
     mode: '0640'
   no_log: "{{ false if (lookup('env', 'CI')) or (lookup('env', 'MOLECULE_PROVISIONER_NAME')) else true }}"
+  become: true
   notify: restart mysqld_exporter
-
-- name: Configure mysqld_exporter web config
-  when:
-    ( mysqld_exporter_tls_server_config | length > 0 ) or
-    ( mysqld_exporter_http_server_config | length > 0 ) or
-    ( mysqld_exporter_basic_auth_users | length > 0 )
-  block:
-    - name: Copy the mysqld_exporter web config file
-      ansible.builtin.template:
-        src: web_config.yaml.j2
-        dest: "{{ mysqld_exporter_config_dir }}/web_config.yaml"
-        owner: root
-        group: '{{ mysqld_exporter_system_group }}'
-        mode: '0640'
-      notify: restart mysqld_exporter
-
-- name: Allow mysqld_exporter port in SELinux on RedHat OS family
-  community.general.seport:
-    ports: "{{ mysqld_exporter_web_listen_address.split(':')[-1] }}"
-    proto: tcp
-    setype: http_port_t
-    state: present
-  when:
-    - ansible_version.full is version_compare('2.4', '>=')
-    - ansible_selinux.status == "enabled"
+  tags:
+    - mysqld_exporter
+    - configure
+    - mysqld_exporter_configure

roles/mysqld_exporter/tasks/install.yml

@@ -1,71 +0,0 @@
----
-- name: Create the mysqld_exporter group
-  ansible.builtin.group:
-    name: "{{ mysqld_exporter_system_group }}"
-    state: present
-    system: true
-  when: mysqld_exporter_system_group != "root"
-
-- name: Create the mysqld_exporter user
-  ansible.builtin.user:
-    name: "{{ mysqld_exporter_system_user }}"
-    groups: "{{ mysqld_exporter_system_group }}"
-    append: true
-    shell: /usr/sbin/nologin
-    system: true
-    create_home: false
-    home: /
-  when: mysqld_exporter_system_user != "root"
-
-- name: Get binary
-  when:
-    - mysqld_exporter_binary_local_dir | length == 0
-    - not mysqld_exporter_skip_install
-  block:
-
-    - name: Download mysqld_exporter binary to local folder
-      become: false
-      ansible.builtin.get_url:
-        url: "{{ mysqld_exporter_binary_url }}"
-        dest: "{{ mysqld_exporter_archive_path }}/mysqld_exporter-{{ mysqld_exporter_version }}.linux-{{ go_arch }}.tar.gz"
-        checksum: "sha256:{{ __mysqld_exporter_checksum }}"
-        mode: '0644'
-      register: _download_binary
-      until: _download_binary is succeeded
-      retries: 5
-      delay: 2
-      delegate_to: localhost
-      check_mode: false
-
-    - name: Unpack mysqld_exporter binary
-      become: false
-      ansible.builtin.unarchive:
-        src: "{{ mysqld_exporter_archive_path }}/mysqld_exporter-{{ mysqld_exporter_version }}.linux-{{ go_arch }}.tar.gz"
-        dest: "{{ mysqld_exporter_archive_path }}"
-        creates: "{{ mysqld_exporter_archive_path }}/mysqld_exporter-{{ mysqld_exporter_version }}.linux-{{ go_arch }}/mysqld_exporter"
-        extra_opts:
-          - --no-same-owner
-      delegate_to: localhost
-      check_mode: false
-
-    - name: Propagate mysqld_exporter binaries
-      ansible.builtin.copy:
-        src: "{{ mysqld_exporter_archive_path }}/mysqld_exporter-{{ mysqld_exporter_version }}.linux-{{ go_arch }}/mysqld_exporter"
-        dest: "{{ mysqld_exporter_binary_install_dir }}/mysqld_exporter"
-        mode: '0755'
-        owner: root
-        group: root
-      notify: restart mysqld_exporter
-      when: not ansible_check_mode
-
-- name: Propagate locally distributed mysqld_exporter binary
-  ansible.builtin.copy:
-    src: "{{ mysqld_exporter_binary_local_dir }}/mysqld_exporter"
-    dest: "{{ mysqld_exporter_binary_install_dir }}/mysqld_exporter"
-    mode: '0755'
-    owner: root
-    group: root
-  when:
-    - mysqld_exporter_binary_local_dir | length > 0
-    - not mysqld_exporter_skip_install
-  notify: restart mysqld_exporter

roles/mysqld_exporter/tasks/main.yml

@@ -2,40 +2,34 @@
 - name: Preflight
   ansible.builtin.include_tasks:
     file: preflight.yml
-    apply:
-      tags:
-        - mysqld_exporter_install
-        - mysqld_exporter_configure
-        - mysqld_exporter_run
   tags:
     - mysqld_exporter_install
     - mysqld_exporter_configure
     - mysqld_exporter_run
 
 - name: Install
-  ansible.builtin.include_tasks:
-    file: install.yml
-    apply:
-      become: true
-      tags:
-        - mysqld_exporter_install
-  when:
-    ( not __mysqld_exporter_is_installed.stat.exists ) or
-    ( (__mysqld_exporter_current_version_output.stderr_lines | length > 0)
-      and (__mysqld_exporter_current_version_output.stderr_lines[0].split(" ")[2] != mysqld_exporter_version) ) or
-    ( (__mysqld_exporter_current_version_output.stdout_lines | length > 0)
-      and (__mysqld_exporter_current_version_output.stdout_lines[0].split(" ")[2] != mysqld_exporter_version) ) or
-    ( mysqld_exporter_binary_local_dir | length > 0 )
+  ansible.builtin.include_role:
+    name: prometheus.prometheus._common
+    tasks_from: install.yml
+  vars:
+    _common_local_cache_path: "{{ mysqld_exporter_local_cache_path }}"
+    _common_binaries: "{{ _mysqld_exporter_binaries }}"
+    _common_binary_install_dir: "{{ mysqld_exporter_binary_install_dir }}"
+    _common_binary_url: "{{ mysqld_exporter_binary_url }}"
+    _common_checksums_url: "{{ mysqld_exporter_checksums_url }}"
+    _common_system_group: "{{ mysqld_exporter_system_group }}"
+    _common_system_user: "{{ mysqld_exporter_system_user }}"
+    _common_config_dir: "{{ mysqld_exporter_config_dir }}"
+    _common_binary_unarchive_opts: ['--strip-components=1']
   tags:
     - mysqld_exporter_install
 
 - name: SELinux
-  ansible.builtin.include_tasks:
-    file: selinux.yml
-    apply:
-      become: true
-      tags:
-        - mysqld_exporter_configure
+  ansible.builtin.include_role:
+    name: prometheus.prometheus._common
+    tasks_from: selinux.yml
+  vars:
+    _common_selinux_port: "{{ mysqld_exporter_web_listen_address | urlsplit('port') }}"
   when: ansible_selinux.status == "enabled"
   tags:
     - mysqld_exporter_configure
@@ -43,10 +37,6 @@
 - name: Configure
   ansible.builtin.include_tasks:
     file: configure.yml
-    apply:
-      become: true
-      tags:
-        - mysqld_exporter_configure
   tags:
     - mysqld_exporter_configure
 

roles/mysqld_exporter/tasks/preflight.yml

@@ -1,24 +1,8 @@
 ---
-- name: Assert usage of systemd as an init system
-  ansible.builtin.assert:
-    that: ansible_service_mgr == 'systemd'
-    msg: "This role only works with systemd"
-
-- name: Install package fact dependencies
-  become: true
-  ansible.builtin.package:
-    name: "{{ _pkg_fact_req }}"
-    state: present
-  when: (_pkg_fact_req)
-  vars:
-    _pkg_fact_req: "{% if (ansible_pkg_mgr == 'apt') %}\
-                    {{ ('python-apt' if ansible_python_version is version('3', '<') else 'python3-apt') }}
-                    {% else %}\
-                    {% endif %}"
-
-- name: Gather package facts
-  ansible.builtin.package_facts:
-  when: "not 'packages' in ansible_facts"
+- name: Common preflight
+  ansible.builtin.include_role:
+    name: prometheus.prometheus._common
+    tasks_from: preflight.yml
 
 - name: Assert that used version supports listen address type
   ansible.builtin.assert:
@@ -72,23 +56,6 @@
           - "__mysqld_exporter_cert_file.stat.exists"
           - "__mysqld_exporter_key_file.stat.exists"
 
-- name: Check if mysqld_exporter is installed
-  ansible.builtin.stat:
-    path: "{{ mysqld_exporter_binary_install_dir }}/mysqld_exporter"
-  register: __mysqld_exporter_is_installed
-  check_mode: false
-  tags:
-    - mysqld_exporter_install
-
-- name: Gather currently installed mysqld_exporter version (if any)
-  ansible.builtin.command: "{{ mysqld_exporter_binary_install_dir }}/mysqld_exporter --version"
-  changed_when: false
-  register: __mysqld_exporter_current_version_output
-  check_mode: false
-  when: __mysqld_exporter_is_installed.stat.exists
-  tags:
-    - mysqld_exporter_install
-
 - name: Discover latest version
   ansible.builtin.set_fact:
     mysqld_exporter_version: "{{ (lookup('url', 'https://api.github.com/repos/{{ _mysqld_exporter_repo }}/releases/latest', headers=_github_api_headers,
@@ -98,24 +65,9 @@
   retries: 10
   when:
     - mysqld_exporter_version == "latest"
-    - mysqld_exporter_binary_local_dir | length == 0
-    - not mysqld_exporter_skip_install
-
-- name: Get mysqld_exporter binary checksum
-  when:
-    - mysqld_exporter_binary_local_dir | length == 0
-    - not mysqld_exporter_skip_install
-  block:
-    - name: Get checksum list from github
-      ansible.builtin.set_fact:
-        __mysqld_exporter_checksums: "{{ lookup('url', mysqld_exporter_checksums_url, headers=_github_api_headers, wantlist=True) | list }}"
-      run_once: true
-      until: __mysqld_exporter_checksums is search('linux-' + go_arch + '.tar.gz')
-      retries: 10
-
-    - name: "Get checksum for {{ go_arch }}"
-      ansible.builtin.set_fact:
-        __mysqld_exporter_checksum: "{{ item.split(' ')[0] }}"
-      with_items: "{{ __mysqld_exporter_checksums }}"
-      when:
-        - "('linux-' + go_arch + '.tar.gz') in item"
+  tags:
+    - mysqld_exporter
+    - install
+    - mysqld_exporter_install
+    - download
+    - mysqld_exporter_download

roles/mysqld_exporter/tasks/selinux.yml

@@ -1,23 +0,0 @@
----
-- name: Install selinux python packages [RedHat]
-  ansible.builtin.package:
-    name: "{{ ['libselinux-python', 'policycoreutils-python']
-           if ansible_python_version is version('3', '<') else
-           ['python3-libselinux', 'python3-policycoreutils'] }}"
-    state: present
-  register: _install_selinux_packages
-  until: _install_selinux_packages is success
-  retries: 5
-  delay: 2
-  when: ansible_os_family | lower == "redhat"
-
-- name: Install selinux python packages [clearlinux]
-  ansible.builtin.package:
-    name: sysadmin-basic
-    state: present
-  register: _install_selinux_packages
-  until: _install_selinux_packages is success
-  retries: 5
-  delay: 2
-  when:
-    - ansible_distribution | lower == "clearlinux"

roles/mysqld_exporter/templates/mysqld_exporter.service.j2

@@ -24,7 +24,7 @@ ExecStart={{ mysqld_exporter_binary_install_dir }}/mysqld_exporter \
     --no-collect.{{ collector }} \
 {% endfor %}
 {% if mysqld_exporter_tls_server_config | length > 0 or mysqld_exporter_http_server_config | length > 0 or mysqld_exporter_basic_auth_users | length > 0 %}
-    --web.config.file={{ mysqld_exporter_config_dir }}/web_config.yaml \
+    --web.config.file={{ mysqld_exporter_config_dir }}/web_config.yml \
 {% endif %}
 {% if mysqld_exporter_version is version('0.15.0', '>=') and
       mysqld_exporter_web_listen_address is iterable and

roles/mysqld_exporter/templates/web_config.yaml.j2

@@ -1,18 +0,0 @@
----
-{{ ansible_managed | comment }}
-{% if mysqld_exporter_tls_server_config | length > 0 %}
-tls_server_config:
-{{ mysqld_exporter_tls_server_config | to_nice_yaml | indent(2, true) }}
-{% endif %}
-
-{% if mysqld_exporter_http_server_config | length > 0 %}
-http_server_config:
-{{ mysqld_exporter_http_server_config | to_nice_yaml | indent(2, true) }}
-{% endif %}
-
-{% if mysqld_exporter_basic_auth_users | length > 0 %}
-basic_auth_users:
-{% for k, v in mysqld_exporter_basic_auth_users.items() %}
-  {{ k }}: {{ v | string | password_hash('bcrypt', ('abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890' | shuffle(seed=inventory_hostname) | join)[:22], rounds=9) }}
-{% endfor %}
-{% endif %}

roles/mysqld_exporter/vars/main.yml

@@ -1,12 +1,9 @@
 ---
-go_arch_map:
-  i386: '386'
-  x86_64: 'amd64'
-  aarch64: 'arm64'
-  armv7l: 'armv7'
-  armv6l: 'armv6'
-
-go_arch: "{{ go_arch_map[ansible_architecture] | default(ansible_architecture) }}"
-
+_mysqld_exporter_go_ansible_arch: "{{ {'i386': '386',
+                                   'x86_64': 'amd64',
+                                   'aarch64': 'arm64',
+                                   'armv7l': 'armv7',
+                                   'armv6l': 'armv6'}.get(ansible_architecture, ansible_architecture) }}"
 _mysqld_exporter_repo: "prometheus/mysqld_exporter"
 _github_api_headers: "{{ {'GITHUB_TOKEN': lookup('ansible.builtin.env', 'GITHUB_TOKEN')} if (lookup('ansible.builtin.env', 'GITHUB_TOKEN')) else {} }}"
+_mysqld_exporter_binaries: ['mysqld_exporter']