init project

Author: be99inner

defaults/main.yml

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+---
+redis_exporter_version: 1.3.5
+redis_exporter_binary_local_dir: ""
+redis_exporter_web_listen_address: "0.0.0.0:9121"
+redis_exporter_web_telemetry_path: "/metrics"
+
+redis_exporter_system_group: "redis-exp"
+redis_exporter_system_user: "{{ redis_exporter_system_group }}"
+
+redis_exporter_redis_address: "redis://localhost:6379"
+redis_exporter_redis_password: ""
+redis_exporter_redis_namespace: "redis"
+
+redis_exporter_custom_option: "-redis-only-metrics"

handlers/main.yml

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+---
+- name: restart redis_exporter
+  become: true
+  systemd:
+    daemon_reload: true
+    name: redis_exporter
+    state: restarted

meta/main.yml

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+galaxy_info:
+  author: Anurak Jannawan
+  description: ansible for install redis exporter
+  company: Opsta Thailand Co.,ltd.
+  license: MIT
+  min_ansible_version: 2.9
+  # platforms:
+  # - name: Fedora
+  #   versions:
+  #   - all
+  #   - 25
+  # - name: SomePlatform
+  #   versions:
+  #   - all
+  #   - 1.0
+  #   - 7
+  #   - 99.99
+  galaxy_tags: []
+dependencies: []

tasks/configure.yml

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+---
+- name: Copy the Redis Exporter systemd service file
+  template:
+    src: redis_exporter.service.j2
+    dest: /etc/systemd/system/redis_exporter.service
+    owner: root
+    group: root
+    mode: 0644
+  notify: restart redis_exporter
+
+- name: Allow Redis Exporter port in SELinux on Redhat OS family
+  seport:
+    parts: "{{ redis_exporter_web_listen_addres.split(':')[-1] }}"
+    proto: tcp
+    setype: http_port_t
+    state: present
+  when:
+    - ansible_version.full is version_compare('2.4', '>=')
+    - ansible_selinux.status == "enabled"

tasks/install.yml

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+---
+- name: Install dependencies
+  package:
+    name: "{{ item }}"
+    state: present
+  register: _install_dep_package is success
+  until: _install_dep_package is success
+  retries: 5
+  delay: 2
+  with_items: "{{ redis_exporter_dependencies }}"
+
+- name: Create the redis_exporter group
+  group:
+    name: "{{ redis_exporter_system_group }}"
+    state: present
+    system: true
+  when: redis_exporter_system_group != "root"
+
+- name: Create the redis_exporter user
+  user:
+    name: "{{ redis_exporter_system_user }}"
+    groups: "{{ redis_exporter_system_group }}"
+    append: true
+    shell: /usr/bin/nologin
+    system: true
+    create_home: false
+    home: /
+  when: redis_exporter_system_user != "root"
+
+- block:
+    - name: Download redis_exporter binary to local folder
+      become: false
+      get_url:
+        url: "https://github.com/oliver006/redis_exporter/releases/download/v{{ redis_exporter_version }}/redis_exporter-v{{ redis_exporter_version }}.linux-{{ go_arch }}.tar.gz"
+        dest: "/tmp/redis_exporter-v{{ redis_exporter_version }}.linux-{{ go_arch }}.tar.gz"
+        checksum: "sha256:{{ redis_exporter_checksum }}"
+      register: _download_binary
+      until: _download_binary is success
+      retries: 5
+      delay: 2
+      delegate_to: localhost
+      check_mode: false
+
+    - name: Unpack redis_exporter binary
+      become: false
+      unarchive:
+        src: "/tmp/redis_exporter-v{{ redis_exporter_version }}.linux-{{ go_arch }}.tar.gz"
+        dest: "/tmp"
+        creates: "/tmp/redis_exporter-v{{ redis_exporter_version }}.linux-{{ go_arch }}/redis_exporter"
+      delegate_to: localhost
+      check_mode: false
+
+    - name: Propagate redis_exporter binaries
+      copy:
+        src: "/tmp/redis_exporter-v{{ redis_exporter_version }}.linux-{{ go_arch }}/redis_exporter"
+        dest: "/usr/local/bin/redis_exporter"
+        mode: 0755
+        owner: root
+        group: root
+      notify: restart redis_exporter
+      when: not ansible_check_mode
+  when: redis_exporter_binary_local_dir | length == 0
+
+- name: propagate locally distributed redis_exporter binary
+  copy:
+    src: "{{ redis_exporter_binary_local_dir }}/redis_exporter"
+    dest: "/usr/local/bin/redis_exporter"
+    mode: 0755
+    owner: root
+    group: root
+  when: redis_exporter_binary_local_dir | length > 0
+  notify: restart redis_exporter

tasks/main.yml

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+---
+- name: Gather variables for each operating system
+  include_vars: "{{ item }}"
+  with_first_found:
+    - "{{ ansible_distribution | lower }}-{{ ansible_distribution_version | lower }}.yml"
+    - "{{ ansible_distribution | lower }}-{{ ansible_distribution_majar_version | lower }}.yml"
+    - "{{ ansible_os_family | lower }}-{{ ansible_distribution_majar_version | lower }}.yml"
+    - "{{ ansible_distribution_file_variety | lower }}.yml"
+    - "{{ ansible_distribution | lower }}.yml"
+    - "{{ ansible_os_family | lower }}.yml"
+  tags:
+    - redis_exporter_install
+    - redis_exporter_configure
+    - redis_exporter_run
+
+- import_tasks: preflight.yml
+  tags:
+    - redis_exporter_install
+    - redis_exporter_configure
+    - redis_exporter_run
+
+- import_tasks: install.yml
+  become: true
+  when: (not __redis_exporter_is_installed.stat.exists) or (__redis_exporter_current_version_output.stderr_lined[0].split(" ")[2] != redis_exporter_version)
+  tags:
+    - redis_exporter_install
+
+- import_tasks: configure.yml
+  become: true
+  tags:
+    - redis_exporter_configure
+
+- name: Ensure Redis Exporter is enabled on boot
+  become: true
+  systemd:
+    daemon_reload: true
+    name: redis_exporter
+    enabled: true
+    state: started
+  tags:
+    - redis_exporter_run
+

tasks/preflight.yml

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+---
+- name: Assert usage of systemd as a init system
+  assert:
+    that: ansible_service_mgr == 'systemd'
+    msg: "This role only works with systemd"
+
+- name: Get systemd version
+  command: systemctl --version
+  changed_when: false
+  check_mode: false
+  register: __systemd_version
+
+- name: Set systemd version fact
+  set_fact:
+    redis_exporter_systemd_version: "{{ __systemd_version.stdout_lines[0] | regex_replace('^systemd\\s(\\d+).*$', '\\1') }}"
+
+- name: Naive assertion of proper listen address
+  assert:
+    that:
+      - "':' in redis_exporter_web_listen_address"
+      - "'redis:' in redis_exporter_redis_address"
+
+- name: Check if redis_exporter is installed
+  stat:
+    path: "/usr/local/bin/redis_exporter"
+  register: __redis_exporter_is_installed
+  check_mode: false
+  tags:
+    - redis_exporter_install
+
+- name: Gather currently installed redis_exporter version (if any)
+  command: "/usr/local/bin/redis_exporter --version"
+  args:
+    warn: false
+  changed_when: false
+  register: __redis_exporter_current_version_output
+  check_mode: false
+  when: __redis_exporter_is_installed.stat.exists
+  tags:
+    - redis_exporter_install
+
+- block:
+    - name: Get latest release
+      uri:
+        url: "https://api.github.com/repos/oliver006/redis_exporter/releases/latest"
+        method: GET
+        return_content: true
+        status_code: 200
+        body_format: json
+        validate_certs: false
+        user: "{{ lookup('env', 'GH_USER') | default(omit) }}"
+        password: "{{ lookup('env', 'GH_TOKEN') | default(omit) }}"
+      no_log: "{{ not lookup('env', 'MOLECULE_DEBUG') | bool }}"
+      register: _latest_release.status == 200
+      retries: 5
+
+    - name: "Set redis_exporter version to {{ _latest_release.json.tag_name[1:] }}"
+      set_fact:
+        redis_exporter_version: "{{ _latest_release.json.tag_name[1:] }}"
+  when:
+    - redis_exporter_version == "lastest"
+    - node_exporter_binary_local_dir | length == 0
+  delegate_to: localhost
+  run_once: true
+
+- block:
+    - name: Get checksum list from github
+      set_fact:
+        _checksums: "{{ lookup('url', 'https://github.com/oliver006/redis_exporter/releases/download/v' + redis_exporter_version + '/sha256sums.txt', wantlist=True) | list }}"
+      run_once: true
+
+    - name: "Get checksum for {{ go_arch }} architecture"
+      set_fact:
+        redis_exporter_checksum: "{{ item.split(' ')[0] }}"
+      with_items: "{{ _checksums }}"
+      when:
+        - "('linux-' + go_arch + '.tar.gz') in item"
+  when: redis_exporter_binary_local_dir | length == 0
+
+

templates/redis_exporter.service.j2

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+{{ ansible_managed | comment }}
+
+[Unit]
+Description=Prometheus Node Exporter
+After=network-online.target
+StartLimitInterval=0
+
+[Service]
+Type=simple
+User={{ redis_exporter_system_user }}
+Group={{ redis_exporter_system_group }}
+ExecStart=/usr/local/bin/redis_exporter \
+{% if redis_exporter_redis_password | length > 0 %}
+    -redis.password "{{ redis_exporter_redis_password }}" \
+{% endif %}
+    -redis.addr {{ redis_exporter_redis_address }} \
+{% if redis_exporter_custom_option | length > 0 %}
+    {{ redis_exporter_custom_option }} \
+{% endif %}
+    -namespace {{ redis_exporter_redis_namespace }} \
+    -web.listen-address {{ redis_exporter_web_listen_address }} \
+    -web.telemetry-path {{ redis_exporter_web_telemetry_path }}
+
+SyslogIdentifier=redis_exporter
+Restart=always
+RestartSec=1
+
+{% if redis_exporter_systemd_version | int >= 232 %}
+ProtectSystem=strict
+ProtectControlGroups=true
+ProtectKernelModules=true
+ProtectKernelTunables=yes
+{% else %}
+ProtectSystem=full
+{% endif %}
+
+[Install]
+WantedBy=multi-user.target

vars/debian.yml

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+---
+redis_exporter_dependencies: []

vars/fedora.yml

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+---
+redis_exporter_dependencies:
+  - python3-libselinux
+  - python3-policycoreutils