mysql keepalived搭建高可用環境

假設已經搭建好了mysql並且存在正常狀態的主主複製

1、安裝keepalived並且根據業務的vip及主機網絡卡，ip配置好/etc/keepalived/keepalived.conf，具體操作已在**框中實現

1

、安裝環境（謹慎，建議先編譯，能通過就不要進行第一步了）
yum -y install popt popt-devel popt-static openssl-devel kernel-devel
【必要時解除安裝掉libnl 和 libnl-devel】
2、編譯安裝
#tar -zxvf keepalived-1.2.23
.tar.gz
#cd keepalived-1.2.23
#./configure --prefix=/usr/local/keepalived
編譯結果如下則正確，不必每一項都比對
keepalived configuration
------------------------keepalived version       : 
1.2.23
compiler                 : gcc
compiler flags           : -g -o2
extra lib                : -lssl -lcrypto -lcrypt 
use ipvs framework       : yes
ipvs sync daemon support : yes
ipvs use libnl           : no
fwmark socket support    : yes
use vrrp framework       : yes
use vrrp vmac            : yes
use vrrp authentication  : yes
snmp keepalived support  : no
snmp checker support     : no
snmp rfcv2 support       : no
snmp rfcv3 support       : no
sha1 support             : no
use debug flags          : no
memory alloc check       : no
libnl version            : none
use ipv4 devconf         : no
use libiptc              : no
use libipset             : no
#make &&make install
3、配置環境
#cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/#cp /usr/local/keepalived/sbin/keepalived /usr/sbin/#cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/#mkdir -p /etc/keepalived
#cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/#chmod +x /etc/init.d/keepalived
4、編輯配置檔案
#vim /etc/keepalived/keepalived.conf
global_defs 
vrrp_instance vi_1 
virtual_ipaddress 
}

2、主機上配置高可用環境（主從兩台機子做相同配置）

1

、編寫監控指令碼    
#mkdir /home/mysql/watch
#touch /home/mysql/watch/check_mysql_process.sh
### check_mysql_process.sh 內容如下 ###
#!/bin/sh
#check mysql & switch hb ha process n/a
rm -f /home/mysql/watch/mysql_process.exist 
ps -ef|grep mysql|grep datadir|grep 8808 |grep -v grep > /home/mysql/watch/mysql_process.exist
if [ -s /home/mysql/watch/mysql_process.exist ] ;then
echo  "ok
"else
/etc/init.d/keepalived stop
#echo 
"hahaha
" > /tmp/wocao
echo `date` >> /home/mysql/watch/result.txt
fi### 其中需要注意的是資料庫例項埠號 ###
2、部署監控指令碼，每10s中執行一次
#chmod a+x /home/mysql/watch/check_mysql_process.sh
#crontab -e
### mysql ha ###
* * * * * /home/mysql/watch/check_mysql_process.sh  >/dev/null
2>&1
* * * * * sleep 10;/home/mysql/watch/check_mysql_process.sh  >/dev/null
2>&1
* * * * * sleep 20;/home/mysql/watch/check_mysql_process.sh  >/dev/null
2>&1
* * * * * sleep 30;/home/mysql/watch/check_mysql_process.sh  >/dev/null
2>&1
* * * * * sleep 40;/home/mysql/watch/check_mysql_process.sh  >/dev/null
2>&1
* * * * * sleep 50;/home/mysql/watch/check_mysql_process.sh  >/dev/null
2>&1

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