本地测试Keepalived实现服务高可用方案

Posted 2023-02-26 爱钓鱼的程序猫

本地使用vmware建了两个centos系统，分别安装keepalived

yum install -y keepalived

然后配置

在机器192.168.2.241添加virtaul IP 192.168.2.245

并设置 state为MASTER

# vi /etc/keepalived/keepalived.conf

! Configuration File for keepalived

vrrp_instance VI_1 
    state MASTER
    interface eth0
    virtual_router_id 51
    priority 100
    advert_int 1
    authentication 
        auth_type PASS
        auth_pass 1111
    
    virtual_ipaddress 
        192.168.2.245
    

在机器192.168.2.242添加virtaul IP 192.168.2.245

并设置 state为BACKUP

# vi /etc/keepalived/keepalived.conf

! Configuration File for keepalived

vrrp_instance VI_1 
    state BACKUP
    interface eth0
    virtual_router_id 51
    priority 100
    advert_int 1
    authentication 
        auth_type PASS
        auth_pass 1111
    
    virtual_ipaddress 
        192.168.2.245
    

启动

# service keepalived start

在两个机器分别安装nginx用来测试是否成功转移了故障机器

现在访问http://192.168.2.245

然后我把241的机器关了再访问访问http://192.168.2.245

我们看到IP滚到另一台机器了。

测试成功。

当然我们模拟的是机器故障，如果只是nginx的问题呢，我们也可以使用keepalived来监控nginx实现IP的切换。