keepalived 双机笔记

tiyan

　　好久没用过keepalived 以前用的时候也没有做过笔记，基本上都忘的差不多了，今天整理的时候记录一下.
　　master配置：
global_defs {
notification_email {
125698756@qq.com
}
notification_email_from admin@qq.com
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}
#vrrp_sync_group VG_1 {
#group {
#VI_1
#}
#notify_master /usr/local/master.sh
#notify_backup /usr/local/backup.sh
#}
vrrp_script check_running
{
script /home/check.sh
interval 8
weight -10
fall 2
rise 2
}
vrrp_instance VI_1
{
state MASTER
interface eth0
virtual_router_id 51
priority 152
debug
nopreempt
advert_int 3
preempt_delay 60
dont_track_primary
track_interface {
eth0
eth1
}
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
172.168.10.200/24
}
track_script {
check_running
}
notify_master /usr/local/master.sh
notify_backup /usr/local/backup.sh
}　　

　　backup配置：
global_defs {
notification_email {
125698756@qq.com
}
notification_email_from admin@qq.com
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}
#vrrp_sync_group VG_1 {
#group {
#VI_1
#}
#notify_master /usr/local/master.sh
#notify_backup /usr/local/backup.sh
#}
vrrp_script check_running
{
script /home/check.sh
interval 8
weight -10
fall 2
rise 2
}
vrrp_instance VI_1
{
state BACKUP
interface eth0
virtual_router_id 51
priority 151
debug
#       nopreempt
preempt_delay 60
advert_int 3
dont_track_primary
track_interface {
eth0
eth1
}      
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
172.168.10.200/24
}
track_script {
check_running
}
notify_master /usr/local/master.sh
notify_backup /usr/local/backup.sh
}　　

　　对与配置文件书写，特别需要注意track_script {之间一定要一个空格符 不然配置会解释错误
　　master 配置需要有nopreempt参数，避免master恢复后抢占，再贴一下check.sh的脚本内容
　　

#!/bin/bash
ip add list|grep '172.168.10.200/24' || exit 0
count=`ps aux | grep -v grep | grep crond | wc -l`
if [[ $count -eq 0 ]]; then
sleep 1.5
count=`ps aux | grep -v grep | grep crond | wc -l`
[ $count -eq 0 ] &&  exit 1
else
echo $count >> /home/log.txt
exit 0
fi