[playbook] node_exporter 설치 playbook

node_exporter를 설치하는 playbook 파일은 앞선 prometheus설치한 디렉토리에 node-exporter 라는 Role을 추가하여 작성하였습니다.

그래서 ansible-prometheus github에서 다운받을 수 있습니다.

https://github.com/hkjeon/ansible-prometheus

 

 

## 환경 정보

node_exporter : xx.xx.xx.4 (RHEL 8.4 / kvmhost)

ansible-controller : xx.xx.xx.5 (RHEL 8.4)

prometheus : xx.xx.xx.6 (RHEL 8.4)

 

 

1. node-exporter-main.yml 생성

[root@hk-controller ansible-prometheus]#cat node-exporter-main.yaml
---
- hosts: node-exporter
  become: false
  gather_facts: false
  roles:
    - node-exporter

 

 

2. install roles 생성

ansible-galaxy init roles/node-exporter

 

 

3. role에서 사용할 변수 내용 구성

[root@hk-controller defaults]#cat main.yml
---
# defaults file for roles/node-exporter
node_exporter_version: 1.2.2
node_exporter_binary_install_dir: '/usr/local/bin'

 

 

4. templates 파일 구성 (systemd용)

[root@hk-controller templates]#cat node_exporter.systemd.j2
[Unit]
Description=Prometheus Node Exporter
Wants=network-online.target
After=network-online.target

[Service]
User=node_exporter
Group=node_exporter
Type=simple
ExecStart=/usr/local/bin/node_exporter

[Install]
WantedBy=multi-user.target

 

 

5. task 작성

[root@hk-controller tasks]#cat main.yml
# tasks file for roles/node_exporter
---
- name: create node_exporter system group
  group:
    name: node_exporter
    system: true
    state: present

- name: node_exporter User add
  user:
    name: node_exporter
    system: true
    shell: "/usr/sbin/nologin"
    group: node_exporter
    createhome: false

- block:
    - name: download node_exporter package to localhost
      become: false
      get_url:
        url: "https://github.com/prometheus/node_exporter/releases/download/v{{ node_exporter_version }}/node_exporter-{{ node_exporter_version }}.linux-amd64.tar.gz"
        dest: "/tmp/node_exporter-{{ node_exporter_version }}.linux-amd64.tar.gz"

    - name: unpack node_exporter binaries
      unarchive:
        src: "/tmp/node_exporter-{{ node_exporter_version }}.linux-amd64.tar.gz"
        dest: "/tmp"
        remote_src: yes

    - name: copy node_exporter and promtool binaries files
      copy:
        src: "/tmp/node_exporter-{{ node_exporter_version }}.linux-amd64/{{ item }}"
        dest: "{{ node_exporter_binary_install_dir }}/{{ item }}"
        mode: 0755
        owner: root
        group: root
        remote_src: yes
      with_items:
        - node_exporter

- name: Configuration systemd Files for node_exporter
  template:
    src: node_exporter.systemd.j2
    dest: /etc/systemd/system/node_exporter.service
    owner: root
    group: root
    mode: 0644
  notify:
    - restart node_exporter

- name: reload for node_exporter
  systemd:
    name: node_exporter
    enabled: true
    state: started

 

 

6. handler 작성

[root@hk-controller handlers]#cat main.yml
---
# handlers file for roles/node-exporter
- name: restart node_exporter
  become: true
  systemd:
    daemon_reload: true
    name: node_exporter
    state: restarted

 

 

7.  hosts에 node-exporter host 추가 

[root@hk-controller ansible-prometheus]#pwd
/root/ansible-playbook/prometheus/ansible-prometheus

[root@hk-controller ansible-prometheus]#cat hosts
[prometheus]
xx.xx.xx.6

[node-exporter]
xx.xx.xx.4

 

 

8. 실행방법

[root@hk-controller ansible-prometheus]#ansible-playbook node-exporter-main.yaml