LVS集群之十种调度算法及负载均衡（配置篇）

megaium@lvs1:~$  apt-get install keepalived
megaium@lvs1:~$  vi /etc/keepalived/keepalived.conf
megaium@lvs1:~$  cat /etc/keepalived/keepalived.conf

#Configuration File for keepalived

global_defs {
   router_id LVS_1   ##keepalived服务器标识
}

vrrp_instance VI_1 {
    state MASTER   ###指定Keepalived的角色，MASTER表示此主机是主用服务器，BACKUP表示是备用服务器。
    interface eth0    ### #指定HA监测网络的接口。
    virtual_router_id 51  ####虚拟路由标识，这个标识是一个数字，并且同一个vrrp实例使用唯一的标识，即同一个vrrp_instance下，MASTER和BACKUP必须是一致的。
    priority 100   ##定义优先级，数字越大，优先级越高，在一个vrrp_instance下，MASTER的优先级必须大于BACKUP的优先级。
    advert_int 1  ##设定MASTER与BACKUP负载均衡器之间同步检查的时间间隔，单位是秒。
    nopreempt

    authentication {   ###设定验证类型和密码。
        auth_type PASS   ###设置验证类型，主要有PASS和AH两种。
        auth_pass 1234     ###设置验证密码，在一个vrrp_instance下，MASTER与BACKUP必须使用相同的密码才能正常通信。
    }

    virtual_ipaddress {
        192.168.2.218
    }

}

virtual_server 192.168.2.218 80 {
    delay_loop 3    ###设置健康检查时间，单位是秒。
    lb_algo wlc     ###设置负载调度算法，详见：http://strongit.blog.51cto.com/10020534/1728596
    lb_kind DR    ###设置LVS实现负载均衡的机制，可以有NAT、TUN和DR三个模式可选。
    protocol TCP

    real_server 192.168.2.201 80 {
        TCP_CHECK {
        connect_timeout 3
        nb_get_retry 3
        delay_before_retry 3
        connect_port 80
        }
    }

    real_server 192.168.2.202 80 {
        TCP_CHECK {
        connect_timeout 3   ###3秒无响应超时
        nb_get_retry 3         #重试次数
        delay_before_retry 3  ##重试间隔
        connect_port 80
        }
    }

    real_server 192.168.2.203 80 {
        TCP_CHECK {
        connect_timeout 3
        nb_get_retry 3
        delay_before_retry 3
        connect_port 80
        }
     }
}

virtual_server 192.168.2.218 5672 {
    delay_loop 3
    lb_algo wlc
    lb_kind DR
    protocol TCP

    real_server 192.168.2.201 5672 {
        TCP_CHECK {
#        connect_timeout 3
        nb_get_retry 3
        delay_before_retry 3
        connect_port 5672
        }
    }

    real_server 192.168.2.202 5672 {
        TCP_CHECK {
#        connect_timeout 3
        nb_get_retry 3
        delay_before_retry 3
        connect_port 5672
        }
    }

    real_server 192.168.2.203 5672 {
        TCP_CHECK {
#        connect_timeout 3
        nb_get_retry 3
        delay_before_retry 3
        connect_port 5672
        }
     }
}


global_defs {
   router_id LVS_2
}

vrrp_instance VI_2 {
    state MASTER
    interface eth0
    virtual_router_id 52
    priority 99
    nopreempt

    authentication {
        auth_type PASS
        auth_pass 1234
    }

    virtual_ipaddress {
        192.168.2.219
    }

}

virtual_server 192.168.2.219 80 {
    delay_loop 3
    lb_algo wlc
    lb_kind DR
#    persistence_timeout 3
    protocol TCP
    real_server 192.168.2.221 80 {
        TCP_CHECK {
    #    connect_timeout 3
        nb_get_retry 1
        delay_before_retry 1
        connect_port 80
        }
    }   

    real_server 192.168.2.222 80 {
        TCP_CHECK {
     #   connect_timeout 3
        nb_get_retry 1
        delay_before_retry 1
        connect_port 80
        }
    }   

    real_server 192.168.2.223 80 {
        TCP_CHECK {
      #  connect_timeout 3
        nb_get_retry 1
        delay_before_retry 1
        connect_port 80
        }
     }  

}

virtual_server 192.168.2.219 5672 {
    delay_loop 3
    lb_algo lblcr
    lb_kind DR
    protocol TCP

    real_server 192.168.2.221 5672 {
        TCP_CHECK {
       # connect_timeout 3
        nb_get_retry 3
        delay_before_retry 3
        connect_port 5672
        }
    }

    real_server 192.168.2.222 5672 {
        TCP_CHECK {
        #connect_timeout 3
        nb_get_retry 3
        delay_before_retry 3
        connect_port 5672
        }
    }

    real_server 192.168.2.223 5672 {
        TCP_CHECK {
        #connect_timeout 3
        nb_get_retry 3
        delay_before_retry 3
        connect_port 5672
        }
     }
}

#!/bin/sh
#LVS Client Server
VIP=192.168.111.138
case  $1  in
                                                                                                                                                                                                                                                          
start)
                                                                                                                                                                                                                                                          
    ifconfig lo:0 $VIP netmask 255.255.255.255 broadcast $VIP
    /sbin/route add -host $VIP dev lo:0
    echo "1" >/proc/sys/net/ipv4/conf/lo/arp_ignore
    echo "2" >/proc/sys/net/ipv4/conf/lo/arp_announce
    echo "1" >/proc/sys/net/ipv4/conf/all/arp_ignore
    echo "2" >/proc/sys/net/ipv4/conf/all/arp_announce
    sysctl -p >/dev/null 2>&1
    echo "RealServer Start OK"
    exit 0
;;
                                                                                                                                                                                                                                                          
stop)
    ifconfig lo:0 down
    route del $VIP >/dev/null 2>&1
    echo "0" >/proc/sys/net/ipv4/conf/lo/arp_ignore
    echo "0" >/proc/sys/net/ipv4/conf/lo/arp_announce
    echo "0" >/proc/sys/net/ipv4/conf/all/arp_ignore
    echo "0" >/proc/sys/net/ipv4/conf/all/arp_announce
    echo "RealServer Stoped OK"
    exit 1
;;
*)
    echo "Usage: $0 {start|stop}"
;;
esac