[playbook] Prometheus 설치 playbook

이전에는 호스트에서 수동으로 설치 및 구성하여 prometheus / node_exporter / grafana 설치 가이드를 정리했습니다.

이번에는 ansible을 통해 3개 프로그램을 각 노드에 설치 및 설정할 수 있게 playbook을 작성 및 테스트해봤고, playbook 작성한 내용과 작성한 파일들을 github에 업로드하였습니다.

 

hk-controller 라는 호스트에서 ansible을 통해 다른 노드에 prometheus 설치를 위한 작성한 yaml에 대한 내용입니다.

작성한 ansible-playbook 파일은 아래 github에서 다운받아서 사용할 수 있습니다.

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

 

 

## 환경 정보

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

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

 

1. main.yml 생성

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

 

 

2. install roles 생성

ansible-galaxy init roles/install

 

 

3. role에서 사용할 변수 내용 구성

[root@hk-controller defaults]#cat main.yaml
---
prometheus_db_dir: /var/lib/prometheus
prometheus_version: 2.30.3
prometheus_ip: xx.xx.xx.6
prometheus_binary_install_dir: '/usr/local/bin'

 

 

4. templates 파일 구성 (systemd용과 prometheus.yml 파일)

[root@hk-controller templates]#cat prometheus.systemd.j2
[Unit]
Description=Prometheus Time Series Collection and Processing Server
Wants=network-online.target
After=network-online.target

[Service]
User=prometheus
Group=prometheus
Type=simple
ExecStart=/usr/local/bin/prometheus \
    --config.file /etc/prometheus/prometheus.yml \
    --storage.tsdb.path /var/lib/prometheus/ \
    --web.console.templates=/etc/prometheus/consoles \
    --web.console.libraries=/etc/prometheus/console_libraries

[Install]
WantedBy=multi-user.target







[root@hk-controller templates]#cat prometheus.yml.j2
# Global config
global:
  scrape_interval:     15s # Set the scrape interval to every 15 seconds. Default is every 1 minute.
  evaluation_interval: 15s # Evaluate rules every 15 seconds. The default is every 1 minute.
  scrape_timeout: 15s  # scrape_timeout is set to the global default (10s).
# A scrape configuration containing exactly one endpoint to scrape:# Here it's Prometheus itself.
scrape_configs:
  # The job name is added as a label `job=<job_name>` to any timeseries scraped from this config.
  - job_name: 'prometheus'
    # metrics_path defaults to '/metrics'
    # scheme defaults to 'http'.
    static_configs:
    - targets: ['{{ prometheus_ip }}:9090']

 

 

5. task 작성

[root@hk-controller tasks]#cat main.yml
---
- name: create prometheus system group
  group:
    name: prometheus
    system: true
    state: present

- name: prometheus User add
  user:
    name: prometheus
    system: true
    shell: "/usr/sbin/nologin"
    group: prometheus
    createhome: false
    home: "{{ prometheus_db_dir }}"

- name: make directory for prometheus
  file:
    path: "{{ prometheus_db_dir }}"
    state: directory
    owner: prometheus
    group: prometheus
    mode: 0755

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

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

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

- name: Make Directory /etc/prometheus
  file:
    path: /etc/prometheus
    state: directory

- name: Configuration for Prometheus.yml
  template:
    src: prometheus.yml.j2
    dest: /etc/prometheus/prometheus.yml
    owner: root
    group: root
    mode: 0644

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

- name: reload for Prometheus
  systemd:
    name: prometheus
    enabled: true
    state: started

- name: Check Port 9090 for Prometheus
  shell:
    cmd: "/usr/bin/curl --connect-timeout 10 --silent --show-error '{{ prometheus_ip }}':9090"
    warn: no
    executable: /bin/bash
  register: check_port

- name: Check port 9090 resule
  debug:
    msg:
      - "{{ check_port.stdout }}"

 

 

6. handler 작성

[root@hk-controller handlers]#cat main.yml
---
- name: restart prometheus
  become: true
  systemd:
    daemon_reload: true
    name: prometheus
    state: restarted

 

 

7.  hosts 작성

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

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

 

 

8. 실행방법

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