linux安装keepalived教程

运维开发小白丶2024-07-16 18:03

1.安装依赖包

bash 复制代码

yum install -y curl gcc openssl-devel libnl3-devel net-snmp-devel

2.安装keepalived

bash 复制代码

yum install -y keepalived

3.更新配置

yaml 复制代码

# 配置文件地址：/etc/keepalived/keepalived.conf
# 1.主节点
vrrp_instance VI_1 {
    state MASTER # 状态只有MASTER和BACKUP两种，并且要大写，MASTER为工作状态，BACKUP是备用状
    interface enp0s8 # 网卡名称，ip addr命令查看，具体看下图
    virtual_router_id 51 # 虚拟路由标识，同一个vrrp_instance的MASTER和BACKUP的
    priority 100 # 优先级，同一个vrrp_instance的MASTER优先级必须比BACKUP高
    advert_int 1 # MASTER 与BACKUP 负载均衡器之间同步检查的时间间隔，单位为秒
    authentication {
        auth_type PASS # 验证authentication。包含验证类型和验证密码。类型主要有PASS、AH两种，通常使用的类型为PASS
        auth_pass 1111 # 据说AH 使用时有问题。验证密码为明文，同一vrrp 实例MASTER 与BACKUP 使用相同的密码才能正常通信。
    }
    virtual_ipaddress {
        192.168.56.110 # 虚拟ip
    }
}

# 2.备份节点
vrrp_instance VI_1 {
    state BACKUP
    interface enp0s8
    virtual_router_id 51
    priority 99
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.56.110
    }
}

4.启动并设置开机自启动

bash 复制代码

systemctl start keepalived   # 启动keepalived
systemctl enable keepalived  # 加入开机启动keepalived
systemctl restart keepalived  # 重新启动keepalived
systemctl status keepalived   # 查看keepalived状态

注意事项：

当某个服务挂了，修复完成后请重启keepalived服务。