之前已經配置好了mysql-cluster群集，由于日常sql節點通常都大于1臺，這意味著應用程序一部分要使用sql1節點，一部分使用sql2節點，當然，所有的應用程序只需要一個節點，但這樣不在群集節點間做分流負載，也就不必做群集了，另外，如果一個群集節點down機了，隨之而來的程序也down掉，該如何解決，因此我用keepalived來實現對sql節點的高可用，問題又來了，這里的keepalived存在單機故障，所以準備2臺互備，我們用lvs來實現負載均衡，這樣其中一個節點或者keepalived壞掉，應用程序將仍然可以工作，因為負載均衡器將請求轉到了工作正常的另外一個節點，我們需要一個虛擬IP地址:192.168.18.100。它會安排給這個MySQL群集的負載均衡,以便于應用程序通過統一單獨的IP地址來訪問群集。?

回想一下之前的部署ip結構:

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192.168.18.10：MGM/SQL1

192.168.18.11：NDBD1/lvs+keepalived

192.168.18.12：NDBD2/lvs+keepalived

192.168.18.9? : ??SQL2

VIP：192.168.18.100

1.在11/12這2臺設備上安裝lvs+keepalived [root@localhost ?home]yum -y install ipvsadm [root@localhost ?home]tar -zxf?keepalived-1.2.7.tar.gz [root@localhost ?home]cd?keepalived-1.2.7 [root@localhost keepalived-1.2.7]#?./configure --prefix=/usr/local/keepalived/ [root@localhost keepalived-1.2.7]#make && make install [root@localhost keepalived-1.2.7]#vi?/usr/local/keepalived/keepalived.conf ! Configuration File for keepalived ? global_defs { ?router_id LVS_DEVEL } ? vrrp_instance VI_1 { ?state MASTER ? ? ? ＃備機上改為BACKUP ?interface eth1 ?virtual_router_id 51 ?priority 100 ?advert_int 3 ?authentication { ?auth_type PASS ?auth_pass 1111 ?} ?virtual_ipaddress { ?192.168.18.100 ?} } ? virtual_server 192.168.18.100 3306 { ?delay_loop 6 ?lb_algo rr ?lb_kind DR ?persistence_timeout 60 ?protocol TCP ? real_server 192.168.18.9 3306 { ?weight 1 ?TCP_CHECK { ?connect_timeout 3 ?nb_get_retry 3 ?delay_before_retry 3 ?connect_port 3306 ?} } real_server 192.168.18.10 3306 { ?weight 1 ?TCP_CHECK{ ?connect_timeout 3 ?nb_get_retry 3 ?delay_before_retry 3 ?connect_port 3306 ?} } } 啟動keepalived： [root@localhost ?home]/usr/local/keepalived/sbin/keepalived -D -f /usr/local/keepalived/keepalived.conf 2.在2臺sql節點行編輯如下腳本 [root@localhost ?home]vi re.sh #!/bin/sh VIP=192.168.18.100 /etc/rc.d/init.d/functions case "$1" in start) echo "Start LVS of RealServer" /sbin/ifconfig lo:0 $VIP broadcast $VIP netmask 255.255.255.255 up 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 ;; stop) /sbin/ifconfig lo:0 down echo "Stop LVS of RealServer" 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 "Usage:$0{start|stop}" exit 1 esac [root@localhost ?home] chmod +x re.sh [root@localhost ?home]./re.sh start

好了，現在可以直接利用vip，192.168.18.100來連接了

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轉載于:https://blog.51cto.com/nanow/1101478

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