keepalived一参数详解与配置

红太狼 2022-05-16 02:05 529阅读 0赞

*  1.备份原配置文件
 *  2.参数解释
 *  3.配置
    
     *  3.1 lb-01主节点配置
     *  3.1 lb-02备节点配置
 *  4.启动keepalived
 *  5.验证
    
     *  5.1关掉主节点的keepalived后，查看备节点是否接管
     *  5.2开启主节点，查看备节点是否释放

# 1.备份原配置文件 #

[root@lb01 ~]# cd /etc/keepalived/
    [root@lb01 keepalived]# cp keepalived.conf keepalived.conf.backup

# 2.参数解释 #

[root@lb01 keepalived]# head -n 30 keepalived.conf|cat -n
         1  ! Configuration File for keepalived ###注释
         2
         3  global_defs {
       ###全局配置
         4     notification_email { ###keepalived故障时发送邮件的目的地址
         5       acassen@firewall.loc
         6       failover@firewall.loc
         7       sysadmin@firewall.loc
         8     }
         9     notification_email_from Alexandre.Cassen@firewall.loc       ###keepalived故障时发送邮件的源地址
        10     smtp_server 192.168.200.1 ###邮件smtp地址
        11     smtp_connect_timeout 30 ###连接smtp超时时间
        12     router_id LVS_DEVEL
        13  }
        14
        15  vrrp_instance VI_1 {
       ###15-30行是一个实例配置，VI_1为实例名称，可修改
        16      state MASTER ###状态，可以是MASTER或BACKUP
        17      interface eth0 ###节点IP的网卡，用来发VRRP包。
        18      virtual_router_id 51###实例的ID
        19      priority 100 ###优先级，越大优先级越高
        20      advert_int 1 ###心跳间隔，一秒收不到心跳 备节点则接管
        21      authentication { ###服务之间密码认证
        22          auth_type PASS
        23          auth_pass 1111
        24      }
        25      virtual_ipaddress {
       ###vip绑定，绑定到interface 设置的网卡
        26          192.168.200.16
        27          192.168.200.17
        28          192.168.200.18
        29      }
        30  }

# 3.配置 #

## 3.1 lb-01主节点配置 ##

[root@lb01 keepalived]# ansible lb -m service -a "name=keepalived state=stopped"
    [root@lb01 ~]# cat /etc/keepalived/keepalived.conf
    global_defs {
       notification_email {
         123456-@qq.com
       }
       notification_email_from Alexandre.Cassen@firewall.loc
       smtp_server 192.168.200.1
       smtp_connect_timeout 30
       router_id LVS_01
    }
    
    vrrp_instance VI_1 {
        state MASTER
        interface eth0
        virtual_router_id 51
        priority 150
        advert_int 1
        authentication {
            auth_type PASS
            auth_pass 1111
        }
        virtual_ipaddress {
            10.0.0.100/24
        }

## 3.1 lb-02备节点配置 ##

[root@lb02 ~]# cat /etc/keepalived/keepalived.conf 
    global_defs {
       notification_email {
         123456-@qq.com
       }
       notification_email_from Alexandre.Cassen@firewall.loc
       smtp_server 192.168.200.1
       smtp_connect_timeout 30
       router_id LVS_02
    }
    
    vrrp_instance VI_1 {
        state BACKUP
        interface eth0
        virtual_router_id 51
        priority 150
        advert_int 1
        authentication {
            auth_type PASS
            auth_pass 1111
        }
        virtual_ipaddress {
            10.0.0.100/24
        }

# 4.启动keepalived #

[root@lb01 ~]# ansible lb -m service -a "name=keepalived state=started"

# 5.验证 #

## 5.1关掉主节点的keepalived后，查看备节点是否接管 ##

[root@lb01 ~]# ansible 10.0.0.10 -m service -a "name=keepalived state=stopped"
    10.0.0.10 | SUCCESS => {
        "changed": true, 
        "name": "keepalived", 
        "state": "stopped"
    }
    [root@lb01 ~]# ansible lb -m shell -a "ip add|grep 10.0.0.100" 
    10.0.0.10 | FAILED | rc=1 >>
    non-zero return code
    
    10.0.0.11 | SUCCESS | rc=0 >>
        inet 10.0.0.100/24 scope global secondary eth0

## 5.2开启主节点，查看备节点是否释放 ##

[root@lb01 ~]# ansible 10.0.0.10 -m service -a "name=keepalived state=started"
    10.0.0.10 | SUCCESS => {
        "changed": true, 
        "name": "keepalived", 
        "state": "started"
    }
    [root@lb01 ~]# ansible lb -m shell -a "ip add|grep 10.0.0.100"
    10.0.0.11 | SUCCESS | rc=0 >>
        inet 10.0.0.100/24 scope global secondary eth0
    
    10.0.0.10 | FAILED | rc=1 >>
    non-zero return code