Keepalived+tomcat的HA配置

需要节点

NODE1—————-IP：192.168.0.2

NODE2—————-IP：192.168.0.3

VIP—————-IP：192.168.0.10

以下操作在2台机器上都要运行

先编辑hosts

vi /etc/hosts

node1    192.168.0.2
node2    192.168.0.3

安装keepalived

yum install keepalived

在node1上

[root@node1 keepalived-1.1.20]# vim /etc/keepalived/keepalived.conf

vrrp_script chk_http_port {
script "/opt/tomcat.pid" #调用脚本的位置
interval  #检查时间，30秒
weight  #权重值，每一次切换后priority的值即是当前priority-weight得到的数值
}
vrrp_instance VI_1 {
state BACKUP #备机状态
nopreempt #不自动failback
interface eth0
virtual_router_id
priority  #用权重值决定优先权
advert_int
authentication {
auth_type PASS
auth_pass
}
track_script {
chk_http_port
}
virtual_ipaddress {
192.168.0.10 #漂移的VIP
}
}

在node2上

[root@node2 ~]# vim /etc/keepalived/keepalived.conf

vrrp_script chk_http_port {
script "/opt/tomcat.pid"
interval
weight
}
vrrp_instance VI_1 {
state BACKUP #备机状态
interface eth0
virtual_router_id
priority  #这里不同，低于node1
advert_int
authentication {
auth_type PASS
auth_pass
}
track_script {
chk_http_port
}
virtual_ipaddress {
192.168.10.196
}
}

2个节点都要编辑tomcat的监控脚本

[root@node2 ~]# vim /opt/tomcat.pid

#!/bin/bash
JAVA_PROCESS=`ps -C java --no-heading| wc -l`
 ];then
/data/tomcat5./bin/startup.sh start

 ];then
/etc/init.d/keepalived stop
fi
fi

 chmod 777 /opt/tomcat.pid

以上，keepalived的部署就完成了。