Ansilble+Consul实现自动监控

一、安装ansible

[root@master ~]# yum install epel-release -y
[root@master ~]# yum install ansible 

二、编写playbook

[root@master monitor]# vi playbook.yaml
[root@master ansible]# cat playbook.yaml 
#- hosts: webservers
- hosts: webservers dbservers
  gather_facts: no
  vars:
    port: 9100
  tasks:
  - name: 推送二进制文件
    unarchive: src=node_exporter-0.18.1.linux-amd64.tar.gz dest=/usr/local
  - name: 重命名
    shell: |
        cd /usr/local/
        if [ ! -d node_exporter ]; then
           mv node_exporter-0.18.1.linux-amd64 node_exporter
        fi
  - name: 推送配置文件
    copy: src=config.yaml dest=/usr/local/node_exporter
  - name: 拷贝systemd文件
    copy: src=node_exporter.service dest=/usr/lib/systemd/system
  - name: 启动服务
    shell: systemctl daemon-reload;systemctl restart node_exporter.service;systemctl enable node_exporter.service
    #systemd: name=node_exporter state=started enable=yes daemon_reload=yes
  - name: 推送注册脚本
    copy: 
      src: consul-register.sh 
      dest: /usr/local/bin/
  - name: 注册当前节点
    # 服务名 实例名 ip 端口
    shell: /bin/bash /usr/local/bin/consul-register.sh {{ group_names[0] }} {{ name }} {{ inventory_hostname }} {{ port }}

[root@master ansible]# vi hosts
[webservers]
192.168.10.115 ansible_port=31235 name=web1
192.168.10.117 ansible_port=31235 name=web2
[dbservers]
192.168.10.116 ansible_port=31235 name=db1

[root@master ansible]# vim consul-register.sh
#!/bin/bash
service_name=1
instance_id=2
ip=3
port=4

curl -X PUT -d '{"id":"'"instance_id"'","name":"'"service_name"'","address":"'"ip"'","port":'"port"',"tags":["'"service_name"'"],"checks":[{"http": "http://'"ip"':'"$port"'","interval":"10s"}]}' http://192.168.10.117:8500/v1/agent/service/register

[root@master ansible]# vi node_exporter.service
[Unit]
Description=node_exporter

[Service]
Restart=on-failure
#ExecStart=/usr/local/node_exporter/node_exporter --web.config=/usr/local/node_exporter/config.yaml
ExecStart=/usr/local/node_exporter/node_exporter

[Install]
WantedBy=multi-user.target

三、配置consul分组

分别做两个分组，一个是webservers，一个是dbservers分组

  - job_name: 'webservers'
    consul_sd_configs:
      - server: '192.168.10.117:8500'
        services: ['webservers']
  - job_name: 'dbservers'
    consul_sd_configs:
      - server: '192.168.10.117:8500'
        services: ['dbservers']

备注：这里的webservers和注册请求”name”:”webservers” 一一对应

四、执行playbook

[root@master ansible]# ansible-playbook -i hosts playbook.yaml -uroot -k
PLAY RECAP *******************************************************************************************************************************************************************************************************************************************************************
192.168.10.115 : ok=7 changed=4 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0   
192.168.10.116 : ok=7 changed=5 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0   
192.168.10.117 : ok=7 changed=3 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0

五、Targets展示

六、consul注销服务

参考官方文档：https://www.consul.io/api/agent/service.html

curl \
    --request PUT \
    http://192.168.10.117:8500/v1/agent/service/deregister/db1