一，keepalived配置文件修改

1，master 上配置keepalived

cat /etc/keepalived/keepalived.conf! Configuration File for keepalivedglobal_defs {   router_id LVS_1}vrrp_script chk_ngx {    script "/data/shell/health_chk.sh"    interval 2    weight 2}vrrp_instance VI_1 {    state MASTER    interface eth1    virtual_router_id 51    priority 100    advert_int 1    nopreempt        #设置 nopreempt 防止抢占资源，只生效BACKUP节点    authentication {        auth_type PASS        auth_pass 1111    }    virtual_ipaddress {        192.168.20.22    }    track_script {        chk_ngx    }}

 

2，backup 上配置keepalived

cat /etc/keepalived/keepalived.conf! Configuration File for keepalivedglobal_defs {   router_id LVS_2}vrrp_script chk_ngx {        script "/data/shell/health_chk.sh"        interval 2        weight 2}vrrp_instance VI_1 {    state BACKUP    interface eth1    virtual_router_id 51    nopreempt    priority 99    advert_int 1    nopreempt            #设置 nopreempt 防止抢占资源，只生效BACKUP节点    authentication {        auth_type PASS        auth_pass 1111    }    virtual_ipaddress {        192.168.20.22    }    track_script {        chk_ngx    }}

3，健康检测脚本

cat health_chk.sh#!/bin/bashA=`ps -C nginx --no-header |wc -l`B=`ps aux|grep -v grep |grep 'zookeeper.properties' |wc -l`C=`ps aux|grep -v grep |grep 'server.properties' |wc -l`if [ $A -eq 0 ];then      /usr/sbin/nginx      sleep 3      if [ `ps -C nginx --no-header |wc -l` -eq 0 ];then        /etc/init.d/keepalived stop      fifiif [ $B -eq 0 ];then    /etc/init.d/zookeeper start    sleep 3    if [ `ps aux|grep -v grep |grep 'zookeeper.properties' |wc -l` -eq 0 ];then        /etc/init.d/keepalived stop    fifiif [ $C -eq 0 ];then    /etc/init.d/kafka start    sleep 3    if [ `ps aux|grep -v grep |grep 'server.properties' |wc -l` -eq 0 ];then        /etc/init.d/keepalived stop    fifi

nginx、zk、kafka都是可以正常启动的应用。可自行更改。

此文可结合进行测试。