Keepalived 安装与配置

下载:http://www.keepalived.org/

what is keepalived?

Keepalived is a routing software written in C. The main goal of this project is to provide simple and robust facilities for loadbalancing and high-availability to Linux system and Linux based infrastructures. Loadbalancing framework relies on well-known and widely used Linux Virtual Server (IPVS) kernel module providing Layer4 loadbalancing. Keepalived implements a set of checkers to dynamically and adaptively maintain and manage loadbalanced server pool according their health. On the other hand high-availability is achieved by VRRP protocol. VRRP is a fundamental brick for router failover. In addition, Keepalived implements a set of hooks to the VRRP finite state machine providing low-level and high-speed protocol interactions. Keepalived frameworks can be used independently or all together to provide resilient infrastructures.

下载源代码

./configure --prefix=/opt/keepalived

报错

configure: error: Popt libraries is required

安装popt开发包

yum install popt-devel

安装后configure输出信息

Keepalived configuration
------------------------
Keepalived version : 1.1.10
Compiler : gcc
Compiler flags : -g -O2
Extra Lib : -lpopt -lssl -lcrypto
Use IPVS Framework : No
IPVS sync daemon support : No
Use VRRP Framework : Yes
Use LinkWatch : No
Use Debug flags : No

我上面的IPVS都是no，为no不支持LVS.

看网上的说法

1. Use IPVS Framework       : Yes  #使用ipvs框架，如果是做keepalive+ha可不要
2. IPVS sync daemon support : Yes  #对ipvs同步的支持
3. Use VRRP Framework       : Yes  #keepalive的核心，必须有！

看网上说法要想IPVS为yes，要带上

--with-kernel-dir=/usr/src/kernels/2.6.18-164.el5-i686/

1. #ln -s /usr/src/kernels/2.6.18-53.el5PAE-i686/  /usr/src/linux //生成一个链接文件
2. 如果/usr/src/kernels没有2.6.18-194.el5，则需要编译
3. #yum -y install kernel-devel
4. #yum -y update kernel
5. #cp /usr/src/kernels/2.6.18-274.el5/include/net/ip_vs.h        /usr/inclide/net/  //这个很重要，否则在安装ipvsadm的时候会提示缺少*.h文件

我暂时没有支持IPVS.

1. 安装完成之后，方了方便起见，请执行以下操作：
2. 1、将安装目录里的/usr/local/keepalive/etc/rc.d/init.d/keepalived 复制到/etc/init.d （这里的安装目录改成自己的）
3. 2、将安装目录里的配置文件/usr/local/keepalive/etc/keepalived/keepalived.conf 复制到/etc/keepalived/里。

keepalived默认配置文件

! Configuration File for keepalived

global_defs {
   notification_email { 通知email
     [email protected]
     [email protected]
     [email protected]
   }
   notification_email_from [email protected]
   smtp_server 192.168.200.1
   smtp_connect_timeout 30
   router_id LVS_DEVEL   #节点名标识，主要用于通知中
}

vrrp_instance VI_1 {

  state MASTER          #配置为主服务器

  interface eth0        #通讯网卡

  virtual_router_id 100 #路由标识

  priority 200          #优先级，0-254

  advert_int 5          #通知间隔，实际部署时可以设置小一点，减少延时

  authentication {

    auth_type PASS

    auth_pass 123456    #验证密码，用于通讯主机间验证

  }

    virtual_ipaddress {
        192.168.200.16
        192.168.200.17
        192.168.200.18
    }
}

virtual_server 192.168.200.100 443 {
    delay_loop 6
    lb_algo rr
    lb_kind NAT
    nat_mask 255.255.255.0
    persistence_timeout 50
    protocol TCP

    real_server 192.168.201.100 443 {
        weight 1
        SSL_GET {
            url {
              path /
              digest ff20ad2481f97b1754ef3e12ecd3a9cc
            }
            url {
              path /mrtg/
              digest 9b3a0c85a887a256d6939da88aabd8cd
            }
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
        }
    }
}

virtual_server 10.10.10.2 1358 {
    delay_loop 6
    lb_algo rr
    lb_kind NAT
    persistence_timeout 50
    protocol TCP

    sorry_server 192.168.200.200 1358

    real_server 192.168.200.2 1358 {
        weight 1
        HTTP_GET {
            url {
              path /testurl/test.jsp
              digest 640205b7b0fc66c1ea91c463fac6334d
            }
            url {
              path /testurl2/test.jsp
              digest 640205b7b0fc66c1ea91c463fac6334d
            }
            url {
              path /testurl3/test.jsp
              digest 640205b7b0fc66c1ea91c463fac6334d
            }
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
        }
    }

    real_server 192.168.200.3 1358 {
        weight 1
        HTTP_GET {
            url {
              path /testurl/test.jsp
              digest 640205b7b0fc66c1ea91c463fac6334c
            }
            url {
              path /testurl2/test.jsp
              digest 640205b7b0fc66c1ea91c463fac6334c
            }
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
        }
    }
}

virtual_server 10.10.10.3 1358 {
    delay_loop 3
    lb_algo rr
    lb_kind NAT
    nat_mask 255.255.255.0
    persistence_timeout 50
    protocol TCP

    real_server 192.168.200.4 1358 {
        weight 1
        HTTP_GET {
            url {
              path /testurl/test.jsp
              digest 640205b7b0fc66c1ea91c463fac6334d
            }
            url {
              path /testurl2/test.jsp
              digest 640205b7b0fc66c1ea91c463fac6334d
            }
            url {
              path /testurl3/test.jsp
              digest 640205b7b0fc66c1ea91c463fac6334d
            }
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
        }
    }

    real_server 192.168.200.5 1358 {
        weight 1
        HTTP_GET {
            url {
              path /testurl/test.jsp
              digest 640205b7b0fc66c1ea91c463fac6334d
            }
            url {
              path /testurl2/test.jsp
              digest 640205b7b0fc66c1ea91c463fac6334d
            }
            url {
              path /testurl3/test.jsp
              digest 640205b7b0fc66c1ea91c463fac6334d
            }
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
        }
    }
}

参考：

http://my.oschina.net/zyc1016/blog/138574