构建高可用服务器之一 Keepalive介绍及安装

gerr3

  Keepalived 是一个基于VRRP协议来实现的LVS服务高可用方案，可以利用其来避免单点故障。一个mysql或lvs或nginx服务会有2台服务器运行Keepalived，一台为主服务器（MASTER），一台为备份服务器（BACKUP），但是对外表现为一个虚拟IP，主服务器会发送特定的消息给备份服务器，当备份服务器收不到这个消息的时候，即主服务器宕机的时候，备份服务器就会接管虚拟IP，继续提供服务，从而保证了高可用性。以下简图为例，当服务调用mysql的时候，直接调用vip，这样即使master上宕机，依旧可访问从数据库。

Keepalive的安装：
1、  安装环境包

1	[iyunv@jacken ~]# yum  -y  install  kernel-devel openssl-devel  popt-devel

2、  安装keepalive

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[iyunv@jacken ~]#  wget http://www.keepalived.org/software/keepalived-1.1.15.tar.gz [iyunv@jacken ~]# tarkeepalived-1.1.15.tar.gz [iyunv@jacken ~]# cd keepalived-1.1.15 [iyunv@jacken keepalived-1.1.15]#./configure--with-kernel-dir=/usr/src/kernels/2.6.32-431.el6.x86_64/ [iyunv@jacken ~]# make && makeinstall

3、  设置keepalive

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[iyunv@jacken ~]# DIR=/usr/local/ ; cp$DIR/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/ [iyunv@jacken ~]# cp $DIR/etc/sysconfig/keepalived/etc/sysconfig/ && mkdir -p /etc/keepalived [iyunv@jacken ~]# cp $DIR/sbin/keepalived/usr/sbin/ [iyunv@jacken ~]# cp/usr/local/etc/keepalived/keepalived.conf /etc/keepalived/ [iyunv@jacken ~]# /etc/init.d/keepalivedrestart Stopping keepalived:                                       [FAILED] Starting keepalived:                                       [  OK  ] [iyunv@jacken ~]#

Other
脚本配置文件：

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[iyunv@jacken ~]# chmod +xinstall_keepalive.sh [iyunv@jacken ~]# cat install_keepalive.sh #!/bin/bash yum -y  install  kernel-devel openssl-devel  popt-devel && wgethttp://www.keepalived.org/software/keepalived-1.1.15.tar.gz && tar keepalived-1.1.15.tar.gz && cd keepalived-1.1.15 && ./configure--with-kernel-dir=/usr/src/kernels/2.6.32-431.el6.x86_64/ && make && make install && DIR=/usr/local/ cp $DIR/etc/rc.d/init.d/keepalived  /etc/rc.d/init.d/  && cp $DIR/etc/sysconfig/keepalived/etc/sysconfig/ && mkdir -p /etc/keepalived && cp $DIR/sbin/keepalived /usr/sbin/&& cp/usr/local/etc/keepalived/keepalived.conf /etc/keepalived/ && /etc/init.d/keepalived restart    if [ $? -eq 0 ];then          echo -e '\e[32mInstall Keepalive Successfully!\e[0m' else          echo -e '\e[31mInstall Keepalive Failure!\e[0m' fi [iyunv@jacken ~]#

其实这个不算是什么脚本，方便安装而已，内容在附件当中！
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2015-5-19 08:22 上传

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