利用saltstack部署keepalived高可用集群

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本文链接： https://blog.csdn.net/weixin_44889616/article/details/99457148

实验环境：

server1：172.25.31.1	salt-master
server2：172.25.31.2	salt-minion、 apache、keepalived
server3：172.25.31.3	salt-minion、nginx、keepalived

apache与nginx的部署上文已经介绍过了，这里就不介绍了。

1.建立keepalived目录

[root@server1 salt]# mkdir keepalived
[root@server1 salt]# cd keepalived/
[root@server1 keepalived]# ls
[root@server1 keepalived]# mkdir files
[root@server1 keepalived]# ls
files

2.copykeepalived配置文件并修改

[root@server1 keepalived]# cat files/keepalived.conf 
! Configuration File for keepalived

global_defs {
   notification_email {
     root@localhost
   }
   notification_email_from keepalived@localhost
   smtp_server 127.0.0.1
   smtp_connect_timeout 30
   router_id LVS_DEVEL
}

vrrp_instance VI_1 {
    state {{ STATE }}
    interface eth0
    virtual_router_id {{ VRID }}
    priority {{ PRIORITY }}
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        172.25.31.100
    }
}

3.编辑keepalived安装文件

[root@server1 keepalived]# cat install.sls 
install-keepalived:
  pkg.installed:
    - pkgs:
      - keepalived

  file.managed:
    - name: /etc/keepalived/keepalived.conf
    - source: salt://keepalived/files/keepalived.conf
    - template: jinja
    - context:
      STATE: {{ pillar['state'] }}
      VRID: {{ pillar['vrid'] }}
      PRIORITY: {{ pillar['priority'] }}

  service.running:
    - name: keepalived
    - watch:
      - file: install-keepalived

4.编辑相应的pillar文件

[root@server1 pillar]# cat web/vars.sls 
{% if grains['fqdn'] == 'server2' %}
webserver: httpd
ip: 172.25.31.2
port: 80
state: MASTER
vrid: 31
priority: 100
{% elif grains['fqdn'] == 'server3' %}
webserver: nginx
state: BACKUP
vrid: 31
priority: 50
{% endif %}
[root@server1 pillar]# cat top.sls 
base:
  '*':
    - web.vars

5.编辑顶层top

root@server1 salt]# cat top.sls 
base:
  'roles:apache':
    - match: grain
    - apache.install
    - keepalived.install
  'roles:nginx':
    - match: grain
    - nginx.service
    - keepalived.install

6.推送相应软件给server2、server3

测试：

server2的优先级较高，vip在server2上

浏览器输入：172.25.31.100

访问的是server2的apache

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关闭server2的keepalived

[root@server2 ~]# systemctl stop keepalived.service 

vip转移到server3上

此时，访问的是server3的nginx