Keepalived安装

# centos 7
tar  -xzvf  keepalived-1.2.1.tar.gz
cd keepalived-1.2.1 
./configure
make
make install 
mkdir  -p  /etc/keepalived
cp /usr/local/etc/keepalived/keepalived.conf /etc/keepalived/

配置Keepalived

vi /etc/keepalived/keepalived.conf
##########################################
! Configuration File for keepalived

global_defs {
   notification_email {
     acassen@firewall.loc
     failover@firewall.loc
     sysadmin@firewall.loc
   }
   notification_email_from Alexandre.Cassen@firewall.loc
   smtp_server 192.168.200.1
   smtp_connect_timeout 30
   router_id LVS_DEVEL
   vrrp_skip_check_adv_addr
   vrrp_strict
   vrrp_garp_interval 0
   vrrp_gna_interval 0
}

# 可设置多 vip
vrrp_instance VI_1 {
  # VRRP 为主节点 
    state BACKUP # MASTER
# 绑定网卡
    interface ens33
# VRRP 组名 节点须一致
    virtual_router_id 51
# 权重
    priority 50
# 组播信息发送间隔，节点须一致
    advert_int 1
# 设置验证信息， 节点须一致
    authentication {
        auth_type PASS
        auth_pass 1111
    }
# 设置虚拟ip 节点须一致
    virtual_ipaddress {
        192.168.28.100

    }

}
######################
# 配合负载均衡使用
# vip端口映射
virtual_server 192.168.28.100 80 {
    delay_loop 6 #轮询次数
    lb_algo rr #调度算法
    lb_kind NAT#lvs 模式
    persistence_timeout 50 # 会话保持时间
    protocol TCP #协议类型

    real_server 192.168.28.2 80 {
        weight 1 # 权重
                    }
   real_server 192.168.28.11 80{
        weight 1 # 权重
        TCP_CHECK {
        connect_timeout 10 # 连接超时时间
        nb_get_retry 3 # 重试次数
        delay_before_retry 3 #重连间隔
        connect_port 80 #检查端口
        }

     }
    }
##################################

验证

# 防火墙放行 vrrp
firewall-cmd --direct  --permanent --add-rule ipv4 filter INPUT 0 --protocol vrrp -j ACCEPT
 firewall-cmd --reload
# 查看日志  默认
/var/log/messages
# 进行主从切换测试