一、简介
Ansible是基于Python开发的自动化运维工具,集合了众多运维工具(puppet、cfengine、chef、func、fabric)的优点,实现了批量系统配置、批量程序部署、批量运行命令等功能。
Exporter是Prometheus的指标数据收集组件,而node_exporter就是我们常用的其中之一,它主要用于采集类UNIX内核的硬件以及系统指标,如磁盘、cpu、内存等信息。
二、环境说明
#操作系统版本
[root@XXXXX][~]
$cat /etc/redhat-release
CentOS Linux release 7.7.1908 (Core)
#Ansible版本
ansible 2.9.25
#node-exporter版本
node_exporter-1.2.2
#环境说明:本操作未涉及容器化部署,同时在centos 7环境进行部署
三、安装Ansible
#上传已经准备好的的安装包(内网环境)
[root@XXXXX ~] tar -zxvf ansible.tar.gz
#使用下面的命令进行安装(yum本地安装)
[root@XXXXX ~]# yum localinstall *.rpm -y
#查看ansible版本
[root@XXX][~]
$ansible --version
ansible 2.9.25
config file = /etc/ansible/ansible.cfg
configured module search path = [u'/root/.ansible/plugins/modules', u'/usr/share/ansible/plugins/modules']
四、使用Ansible部署node_exporter
1)填写需要部署的主机清单host
#如果机器之间已经做了免密,那就去掉ansible_ssh_pass改配置,多台机器直接追加就行
[root@XXXXXX][~]
$vim host
[node]
XX.XX ansible_ssh_user=XXX ansible_ssh_pass="XXXXXX"
XX.XX ansible_ssh_user=XXX ansible_ssh_pass="XXXXXX"
2)编写Ansible的剧本文件node_exporter.yml
---
- hosts: node
gather_facts: yes
become: yes
become_method: sudo
become_user: root
tasks:
- name: 添加prometheus用户
user:
name: prometheus
password: "{{ 'XXXXX' | password_hash('sha512') }}"
home: /home/prometheus
- name: 创建node_exporter_script目录
file:
path: /home/prometheus/node_exporter_script
state: directory
mode: '0755'
owner: prometheus
group: prometheus
- name: 创建node_exporter_textfile目录
file:
path: /home/prometheus/node_exporter_textfile
state: directory
mode: '0755'
owner: prometheus
group: prometheus
- name: 安装CentOS7的node_exporter
unarchive: src=node_exporter-1.2.2.linux-amd64.tar.gz dest=/home/prometheus mode='0755' owner=prometheus group=prometheus
when:
- ansible_distribution == "CentOS"
- ansible_distribution_major_version == "7"
- name: 添加CentOS7的node_exporter服务
copy: src=prometheus_node_exporter.service dest=/usr/lib/systemd/system/prometheus_node_exporter.service
when:
- ansible_distribution == "CentOS"
- ansible_distribution_major_version == "7"
- name: 开启centos7的prometheus_node_exporter服务并设置开机自启动
systemd:
name: prometheus_node_exporter
daemon_reload: yes
state: restarted
enabled: yes
when:
- ansible_distribution == "CentOS"
- ansible_distribution_major_version == "7"
3)编写node-exporter的注册服务文件
[root@XXX][~]
$vim prometheus_node_exporter.service
[Unit]
Description=Prometheus node_exporter
Requires=network.target remote-fs.target
After=network.target remote-fs.target
[Service]
Type=simple
User=prometheus
Group=prometheus
ExecStart=/home/prometheus/node_exporter-1.2.2.linux-amd64/node_exporter --collector.textfile.directory=/home/prometheus/node_exporter_textfile
ExecReload=/bin/kill -HUP $MAINPID
KillMode=process
Restart=on-failure
RestartSec=5s
[Install]
WantedBy=multi-user.target
4)命令执行
[root@XXX ~]
$ansible-playbook node_exporter.yml -i host
5)服务验证
#验证目标端口是否开启
[root@XXXXX ~]
$telnet 目标主机 9100
至此,使用Ansible部署node-exporter完成。