saltstack自动化部署keepalived

最新推荐文章于 2022-09-19 00:02:11 发布

sura_1988

最新推荐文章于 2022-09-19 00:02:11 发布

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本文链接：https://blog.youkuaiyun.com/weixin_43314056/article/details/99634979

本文介绍如何使用SaltStack配置Keepalived服务，实现服务器集群的高可用性。详细展示了安装、配置文件、服务启动及状态监控的过程，通过实例验证了高可用性的实现。

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配置结构

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1、install.sls

[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

2、keepalived.conf

[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 {
        172.25.14.100
    }
}

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3、top.sls

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

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4、pillar

[root@server1 salt]# cat ../pillar/web/vars.sls 
{% if grains['fqdn'] == 'server2' %}
ip: 172.25.14.2
state: MASTER
vrid: 43
priority: 100
{% elif grains['fqdn'] == 'server3' %}
state: BACKUP
vrid: 43
priority: 50
{% endif %}

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[root@server1 salt]# cat ../pillar/top.sls 
base:
  '*':
    - web.vars

5、推送部署

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

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VIP在server2
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server2部署的为httpd，因此，浏览器访问VIP，应该是apache默认页

将keepalived停止后，VIP飘移在server3上，浏览器访问应该为nginx的默认页

高可用已经实现，如果需要实现负载均衡可以使用haproxy或者nginx来通过saltstack部署