lvs + keepalived + nginx + tomcat高可用负载反向代理服务器配置（二） LVS

一、安装lvs

sudo apt-get install ipvsadm

二、安装keepalived

sudo apt-get install keepalived

三、创建keepalived.conf文件

sudo gedit /etc/keepalived/keepalived.conf

四、配置keepalived.conf

# Global Configuration
global_defs {
    lvs_id  director1
}

# VRRP Configuration
vrrp_instance LVS {
    state MASTER
    interface eth0
    virtual_router_id 51
    priority 150
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 123456
    }

    virtual_ipaddress {
        192.168.2.68
    }

    # Virtual Server Configuration - for WWW service
    virtual_server 192.168.2.68 80 {
        delay_loop 1
        lb_algo rr
        lb_kind DR
        persistence_timeout 60
        protocol TCP

        # Real Server 1 configuration
        real_server 192.168.2.67 8070 {
            weight 3
            TCP_CHECK {
                connection_timeout 10
                nb_get_retry 3
                delay_before_retry 3
            }
        }

        # Real Server 2 configuration
        real_server 192.168.2.66 8070 {
            weight 1
            TCP_CHECK {
                connection_timeout 10
                nb_get_retry 3
                delay_before_retry 3
            }
        }
    }
}

　　
　　1.配置vrrp   ip为68(启动keepalived之后可使用ip addr可查看)

　　2.配置real_server   此处是67和66的一个集群

五、启动并查看keepalived

#service keepalived start
查看 keepalived状态
#  ps -ef | grep keepalived
root      4783     1  0 09:49 ?        00:00:00 keepalived -D
root      4784  4783  0 09:49 ?        00:00:01 keepalived -D
root      5191  4896  0 13:43 pts/2    00:00:00 grep keepalived
如果未能启动，请使用sudo启动或者检查配置文件

# tail -f /var/log/messages
Feb 21 14:18:48 localhost Keepalived_vrrp: Registering gratutious ARP shared channel
Feb 21 14:18:48 localhost Keepalived_vrrp: Opening file ‘/etc/keepalived/keepalived.conf‘.
Feb 21 14:18:48 localhost Keepalived_vrrp: Configuration is using : 35706 Bytes
Feb 21 14:18:48 localhost Keepalived_vrrp: Using LinkWatch kernel netlink reflector...
Feb 21 14:18:49 localhost Keepalived_vrrp: VRRP sockpool: [ifindex(2), proto(112), fd(9,10)]
Feb 21 14:18:50 localhost Keepalived_vrrp: VRRP_Instance(VI_1) Transition to MASTER STATE
Feb 21 14:18:51 localhost Keepalived_vrrp: VRRP_Instance(VI_1) Entering MASTER STATE
Feb 21 14:18:51 localhost Keepalived_vrrp: VRRP_Instance(VI_1) setting protocol VIPs.
Feb 21 14:18:51 localhost Keepalived_vrrp: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 192.168.2.150
Feb 21 14:18:51 localhost avahi-daemon[2549]: Registering new address record for 192.168.2.150 on eth0.

可以看到VIP已经在主服务器上开启

到此lvs+keepalived就已经完成了，接下来就是nginx.