Centos6.8下tar包安装Keepalived

简介

Keepalived是一个免费开源的交换机制软件。主要提供负载均衡和高可用的相关功能，负载均衡实现需要依赖Linux的虚拟服务内核模块（ipvs），而高可用是通过VRRP协议实现多台机器之间的故障转移服务。 
Keepalived的所有功能是配置keepalived.conf文件来实现的。

安装与配置

从官网下载keepalived的最新版本，本文以当前最新版本1.3.0为例。

首先将keepalived-1.3.0.tar.gz上传至centos，比如放在 /root/downloads下。

安装

[root@t-ci downloads]#tar -zxvf keepalived-1.3.0.tar.gz

[root@t-ci downloads]#cd keepalived-1.3.0  #进入keepalived文件夹

[root@t-ci keepalived-1.3.0]#./configure --prefix=/usr/local/keepalived  #指定安装目录，可以事先用mkdir建好keepalived文件夹

[root@t-ci keepalived-1.3.0]#make && make install #安装

如果提示

-bash:make: command not found

需要安装make命令

yum -y install gcc automake autoconf libtool make

配置

安装完成后，进入/usr/local/keepalived/etc(注：/usr/local/keepalived是本例中keepalived的安装目录)，将keepalived相应的配置文件拷贝到系统相应的目录当中。keepalived启动时会从/etc/keepalived目录下查找keepalived.conf配置文件，如果没有找到则使用默认的配置。/etc/keepalived目录安装时默认是没有安装的，需要手动创建。

[root@t-ci keepalived]# cd /etc       #进入etc
[root@t-ci etc]# mkdir keepalived     #创建keepalived文件夹

配置文件目录结构如下所示：

[root@t-ci keepalived-1.3.0]# cd /usr/local/keepalived/etc
[root@t-ci etc]# ll
total 12
drwxr-xr-x. 3 root root 4096 Jun 20 15:59 keepalived
drwxr-xr-x. 3 root root 4096 Jun 20 15:31 rc.d
drwxr-xr-x. 2 root root 4096 Jun 20 15:31 sysconfig

这个不太直观，也可以用tree命令查看文件夹的树形目录结构，没有tree命令的话，用yum安装即可。

[root@t-ci etc]# yum install tree -y
...安装过程
[root@t-ci etc]# tree -l /usr/local/keepalived/etc

keepalived主要有以下几个配置文件：
/etc/keepalived/keepalived.conf
/etc/rc.d/init.d/keepalived
/etc/sysconfig/keepalived

将以上配置文件拷贝到etc目录下：
[root@t-ci ~]#cd /etc                    #进入etc
[root@t-ci etc]# mkdir /etc/keepalived   #创建keepalived文件夹
[root@t-ci etc]# cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf
[root@t-ci etc]# cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/keepalived
[root@t-ci etc]# cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/keepalived

 

启动

设置keepalived服务开机启动：

[root@t-ci ~]# chkconfig keepalived on
[root@t-ci ~]# service keepalived start   #启动服务

启动过程如果遇到：

env: /etc/init.d/keepalived: Permission denied

需要对该文件赋权

[root@t-ci etc]# chmod -R 777 /etc/init.d/keepalived

 

如果遇到：

Starting keepalived: /bin/bash: keepalived: command not found

原因:这是由于系统默认会查找/usr/bin下的命令，如果这个命令不在这个目录下，当然会找不到命令，我们需要做的就是映射一个链接到/usr/bin目录下，相当于建立一个链接文件。

[root@t-ci etc]# ln -s /usr/local/keepalived/sbin/keepalived /usr/sbin/

另外，这两个命令分别是停止和重启keepalived服务的。

[root@t-ci etc]# service keepalived stop #停止服务
[root@t-ci etc]# service keepalived restart #重启服务

 

keepalived正常运行后，会启动3个进程，其中一个是父进程，负责监控其子进程。一个是vrrp子进程，另外一个是checkers子进程。

[root@t-ci etc]# ps -ef|grep keepalived
root     24757     1  0 15:37 ?        00:00:00 keepalived -D
root     24759 24757  0 15:37 ?        00:00:13 keepalived -D
root     24760 24757  0 15:37 ?        00:00:00 keepalived -D
root     24805  4918  0 16:41 pts/1    00:00:00 grep keepalived

到此keepalived就安装完成了。

 

 

转载于:https://my.oschina.net/u/3437699/blog/993830