yum install -y make wget 如果你愿意可以更新下系统,更换下yum源. 1.安装keepalive官方最新版 keepalived-1.2.7tar zxvf keepalived-1.2.7.tar.gz cd keepalived-1.2.7 在此之前。请安装一下一些简单的工具 yum install -y gcc openssl-devel popt-devel 不然会编译不成功的。 然后 ./configure make && make install cp /usr/local/etc/rc.d/init.d/keepalived /etc/init.d/ cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/ chmod +x /etc/init.d/keepalived chkconfig --add keepalived chkconfig keepalived on mkdir /etc/keepalived ln -s /usr/local/sbin/keepalived /usr/sbin/ 2.安装nginxnginx-1.2.5.tar.gztar zxvf nginx-1.2.5.tar.gz cd nginx-1.2.5 安装一下相关组件. yum install -y pcre-devel ./configure --prefix=/usr/local/nginx --user=www --group=www --with-http_stub_status_module --with-http_ssl_module make && make install 3.配置keepalive 两台服务器端keepalived.conf内容都为如下,都设置为backup,不抢占,注意修改优先级不同,更详细的keepalived配置文件说明可以执行man keepalived.conf查看: ! Configuration File for keepalived global_defs { notification_email { admin@lvtao.net } notification_email_from admin@lvtao.net smtp_server 127.0.0.1 smtp_connect_timeout 30 router_id LVS_DEVEL } #监控服务.NGINX mysql等 vrrp_script chk_nginx { script "/home/check_nginx.sh" interval 2 weight 2 } vrrp_instance VI_1 { state BACKUP #主从设置 MASTER interface eth2 #网卡名 virtual_router_id 51 mcast_src_ip 10.0.1.133 #本机IP priority 50 #从机小于主机 advert_int 1 authentication { auth_type PASS auth_pass chtopnet } virtual_ipaddress { 10.0.1.2 #VIP 的IP } track_script { chk_nginx #检测脚本 } } virtual_server 10.0.1.2 80 { delay_loop 6 lb_algo rr lb_kind DR persistence_timeout 50 protocol TCP real_server 10.0.1.132 80 { weight 3 TCP_CHECK { connect_timeout 10 nb_get_retry 3 delay_before_retry 3 connect_port 80 } } real_server 10.0.1.133 80 { weight 3 TCP_CHECK { connect_timeout 10 nb_get_retry 3 delay_before_retry 3 connect_port 80 } } } 启动相关服务。我在这儿使用的是nginx ,每个上面开了一个站点,通过IP可以直接访问的。启动keepalive后,就可以通过VIP的虚拟IP 10.0.1.2来访问站点了,测试方法就是 停止任何其中一个站点,看它是否能自动切换到从服务器上。 上面代码中 nginx的检测脚本如下 : #!/bin/bash if [ "$(ps -ef | grep "nginx: master process"| grep -v grep )" == "" ] then /usr/local/nginx/sbin/nginx sleep 5 if [ "$(ps -ef | grep "nginx: master process"| grep -v grep )" == "" ] then killall keepalived fi fi 在两台Web Server上执行realserver.sh脚本,为lo:0绑定VIP地址10.0.1.2、抑制ARP广播。 #!/bin/bash #description: Config realserver VIP=10.0.1.2 /etc/rc.d/init.d/functions case "$1" in start) /sbin/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" ;; stop) /sbin/ifconfig lo:0 down /sbin/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" ;; *) echo "Usage: $0 {start|stop}" exit 1 esac exit 0 分别在主从机上执行 sh realserver.sh start 就可实现负载均衡及高可用集群 转载请保留固定链接: https://linuxeye.com/Linux/994.html |