构建大型web集群之keepalived部署（1）

【本文档所介绍的内容适用于公司测试/生产keepalived部署】

一：环境部署前准备：

1.1相关软件以及系统

系统要求：Centos 6.6 (64位)

相关中间件：Keepalived：1.2.15 

1.2检查keepalived所需要的依赖包是否已经安装

# rpm -qa | grep popt       //（安装keepalived需要popt支持）
# rpm -qa | grep openssl     //（安装keepalived需要openssl支持）

注意：如不知道keepalived需要哪些依赖包，可到下载后的源码解压目录下查看INSTALL 文件内容，安装需要的依赖包，源码安装任何一个软件都要养成查看源码包文档的习惯，比如INSTALL，README,doc等文档，可以获得很多有用的信息

1.3如若没有安装以上依赖包，可使用yum安装相关依赖包，如下

# yum install openssl  openssl-devel  popt popt-devel

二：源码编译安装keepalived：

2.1下载keepalived源码包并解压

# wget http://www.keepalived.org/software/keepalived-1.2.15.tar.gz
# tar zxvf keepalived-1.2.15.tar.gz -C /usr/local/src

2.2编译安装keepalived

# cd /usr/local/src/keepalived-1.2.15/
# ./configure \
 --prefix=/usr/local/keepalived \
 --sbindir=/usr/local/keepalived/sbin  
# make 
# make install 

2.3对keepalived进行相关优化

<---拷贝keepalived相关启动命令--->
# cp /usr/local/keepalived/sbin/keepalived /usr/sbin/ 
# cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/ 
<---将keepalived启动脚本添加到系统服务--->
# cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/
# chkconfig --add keepalived 
# chkconfig --level 2345 keepalived on
<---创建keepalived相关配置文件--->
# mkdir -p /etc/keepalived 
# cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived

备注说明：
1. keepalived安装完成后，安装目录为:/usr/lccal/keepalived, 配置文件路径为:/etc/keepalive/
2. 安装完成后，需要将启动脚本复制到/etc/ini.d/下
3.注意一定要执行述上的相关操作，不然有可能导致keepalived服务起不来

三:启动keepalived服务

# service keepalived start
如果keepalived已经启动，这时我们就可以查看以下命令查看启动情况：
# service keepalived status   
或
# ps aux | grep keepalived

到这里，keepalived部署基本OK，如需要部署lvs参照相关文档即可！