saltstack+keepalived实现高可用

本篇博客承接saltstack安装部署和saltstack—— grains,pillar,jinja模块的使用

[root@server1 salt]# ls
_grains  httpd  nginx  top.sls
[root@server1 salt]# mkdir keepalived
[root@server1 salt]# cd keepalived/
[root@server1 keepalived]# mkdir files

创建目录。

[root@server1 keepalived]# vim 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 {
        172.25.26.100    ##vip
    }
}

编写keepalived的主配置文件。

[root@server1 keepalived]# vim /srv/pillar/vars.sls 

{% if grains['fqdn'] == 'server3' %}
state: BACKUP				
vrid: 26
priority: 50				##优先值
ip: 172.25.26.3
{% elif grains['fqdn'] == 'server2' %}
state: MASTER
vrid: 26
priority: 100
ip: 172.25.26.2
{% endif %}

编写pillar目录下的文件，设置主备机以及vip的优先值，我在server2设置的优先值为100，所以vip默认在server2.

[root@server1 keepalived]# vim install.sls

kp-install:
  pkg.installed:
    - pkgs:
      - keepalived			##安装keepalived

  file.managed:
    - name: /etc/keepalived/keepalived.conf			        ##拷贝目标目录
    - source: salt://keepalived/files/keepalived.conf		##将主配置文件拷贝到远程主机
    - template: jinja
    - context:
        STATE: {{ pillar['state'] }}
        VRID:  {{ pillar['vrid'] }}
        PRIORITY: {{ pillar['priority'] }}			##pillar目录中设置的值。

  service.running:									##开启服务
    - name: keepalived
    - enable: true
    - reload: true
    - watch:
      - file: kp-install

编写自动部署的sls文件。

[root@server1 keepalived]# salt server2 state.sls keepalived.install

推送。

在server2中查看到vip：172.25.26.100.

[root@server1 keepalived]# vim /srv/salt/top.sls 

base:
  'server2':
    - keepalived.install
  'server3':
    - keepalived.install

因为要在两台主机上部署，所以在salt目录写一个top.sls文件。

[root@server1 keepalived]# salt '*' state.highstate

推送。

[root@server2 keepalived]# systemctl stop keepalived

将server2的keepalived服务停止。

此时vip已经飘到server3了。

[root@server2 keepalived]# systemctl  start keepalived

因为前面设置的优先级，所以再次打开服务后vip又会漂到server2