创建脚本etcinit.drealserver#geditetcinit.dmyservice#chkconfig:23451090#description:myservice.. 创建脚本 /etc/init.d/realserver #gedit /etc/init.d/myservice # chkconfig: 2345 10 90 # description: myservice ... SNS_VIP10.28.0.130 . /et
创建脚本etcinit.drealserver#geditetcinit.dmyservice#chkconfig:23451090#description:myservice.. 创建脚本 /etc/init.d/realserver #gedit /etc/init.d/myservice # chkconfig: 2345 10 90 # description: myservice ... SNS_VIP10.28.0.130 . /etc/rc.d/init.d/functions case "$1" in start) ifconfig lo:0 $SNS_VIP netmask 255.255.255.255 broadcast $SNS_VIP /sbin/route add -host $SNS_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>; stop) ifconfig lo:0 down route del $SNS_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 Start Stoped" ;; *) echo "Usage: $0 {start|stop}" exit 1 esac exit0 解释 SNS_VIP10.28.0.130 #定义VIP变量 . /etc/rc.d/init.d/functions #导脚本库 case "$1" in #case语句 $1传递给该shell脚步的第一个参数 start) ifconfig lo:0 $SNS_VIP netmask 255.255.255.255 broadcast $SNS_VIP #设置lo: 0 VIP netmask 及广播 /sbin/route add -host $SNS_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>; stop) ifconfig lo:0 down route del $SNS_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 Start Stoped" ;; *) echo "Usage: $0 {start|stop}" exit 1 esac exit0 给脚本赋予权限 chmod 750 realserver chkconfig realserver on #设置开机自启动 service realserver start 搭建负载均衡 1.安装ipvsadm keepalived 如果是centos内核2.6以上自带ipvsadm yum -y install ipvsadm keepalived 配置keepalived > /etc/keepalived/keepalived.conf #覆盖掉原来的配置文件 vim /etc/keepalived/keepalived.conf ! Configuration File for keepalived global_defs { # notification_email { # acassenfirewall.loc # failoverfirewall.loc # sysadminfirewall.loc # } # otification_email_from Alexandre.Cassenfirewall.loc # mtp_server 192.168.200.1 # mtp_connect_timeout 30 router_id LVS_DEVEL } vrrp_instance VI_1 { state MASTER interface eth0 virtual_router_id 51 priority 100 advert_int 1 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 10.28.0.130 # 192.168.200.17 # 192.168.200.18 } } virtual_server 10.28.0.130 80 { delay_loop 6 lb_algo rr lb_kind DR nat_mask 255.255.255.0 persistence_timeout 0 protocol TCP real_server 10.28.0.133 80 { weight 1 TCP_CHECK { connect_timeout 3 nb_get_retry 3 delay_before_retry 3 connect_port 80 } } real_server 10.28.0.134 80 { weight 1 TCP_CHECK { connect_timeout 3 nb_get_retry 3 delay_before_retry 3 connect_port 80 } } } 解释 global_defs { router_id LVS_DEVEL_1 //本路由器服务器的名称 } vrrp_instance VI_1 { //定义vrrp热备实例 state MASTER //热本状态MASTER表示主服务器 备份服务器设置为BACKUP interface eth0 //承载vip的物理端口 virtual_router_id 51 //虚拟路由器的ID号每个热备组保持一致 priority 150 //优先级数值越大优先级越高这里应该主服务器高于辅助的 BACKUP可以设置的比主服务器小 advert_int 1 //通告间隔秒数心跳频率 authentication { //认证信息每个热备组保持一致 auth_type PASS //认证类型 auth_pass 1111 //认证密码 } virtual_ipaddress { //指定漂移地址vip可以有多个 192.168.1.198 } } virtual_server 192.168.1.198 80 { //虚拟服务器地址vip、端口 delay_loop 6 //健康检查间隔时间 lb_algo rr //轮询rr调度算法 lb_kind DR //直接路由模式DR protocol TCP //应用服务采用的模式是TCP模式 real_server 192.168.1.191 80 { //第一个Web节点的地址、端口 weight 1 //节点的权重 TCP-CHECK { //健康检查方式 connect_timeout 3 //连接超时秒 nb_get_retry 3 //重试次数 delay_before_retry 3 //重试间隔秒 connect_port 80 //检查的目标端口 } } real_server 192.168.1.192 80 { //第二个Web节点 weight 1 TCP-CHECK { connect_timeout 3 nb_get_retry 3 delay_before_retry 3 connect_port 80 } } } 启动keepalived service keepalived start 查看启动日志 tail -f /var/log/messages 访问10.28.0.130
