基于VMware的虚拟Linux集群搭建-lvs+keepalived

基于VMware的虚拟Linux集群搭建-lvs+keepalived

准本工作

若本机没有yum库，最好配置安装yum库，方便软件的安装

yum库创建基本步骤

①安装createrepo

②yum -y installl createrepo

        ③用createrepo创建

createrepo命令用于生成yum仓库所须要的一些基本配置信息。

详细请參考“yum库的安装于配置”

集群配置

1. 设置虚拟机IP

在Vmare虚拟机中虚拟四个Linux主机

LvsMaster：192.168.10.101

LvsBak:        192.168.10.102

RealServer1: 192.168.10.121

RealServer2: 192.168.10.122

           主机之间的拓扑关系图

2. 安装ipvsadm 和 keepalived

① 分别在LvsMaster和LvsBak上安装 ipvsadm

yum -y install *ipvsadm*

下载地址：wget http://www.linuxvirtualserver.org/software/kernel-2.6/ipvsadm-1.24.tar

       ②分别在LvsMaster和LvsBak上安装 keepalived

安装依赖库：yum install -y openssl openssl-devel

下载keepalived：wget  http://www.keepalived.org/software/keepalived-1.2.6.tar.gz

         tar zxvf keepalived-1.2.6.tar.gz
./configure --prefix=/usr/local/keepalived
make
make install
cp /usr/local/keepalived/sbin/keepalived   /usr/sbin/
cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/
cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/
mkdir /etc/keepalived

cp /usr/local/keepalived/etc/keepalived/keepalived /etc/keepalived.conf

      ③ 配置 keepalived

LvsMaster配置

global_defs {
    notification_email {
      540621626@qq.com  #emial通知 
    }
    notification_email_from 540621626@qq.com
    smtp_server 192.168.200.1
    smtp_connect_timeout 30
    router_id LVS_DEVEL
}

vrrp_sync_group test {  #设置vrrp组
group {
loadbalance
}
}
vrrp_instance loadbalance {
    state MASTER                      #设置主机类型，MASTER和BACKUP两种。必须大写 ，即太主机一台备用机
    interface eth0 #设置对外服务网卡
    virtual_router_id 51
    priority 100                                        #设置优先级。备用主机的优先级要比主机低就可以
    advert_int 1#设置同步时间间隔
    authentication {#设置验证类型和password
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {#设置虚拟ip，即浮动ip
        192.168.10.115
    }

virtual_server 192.168.10.115 80 {
    delay_loop 6 #健康检查时间间隔
    lb_algo rr#负载调度算法，默觉得轮训算法
    lb_kind DR#负载均衡转发规则，也就是IP转发规则，DR转发方式最快。可是全部机器必须在一个网段内。还有NAT和TUNEL两种转发方式
    protocol TCP

    real_server 192.168.10.121 80 {
        weight 1
        TCP_CHECK {
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
        }
    }

    real_server 192.168.10.122 80 {
    weight 1
TCP_CHECK {
    connect_timeout 3
    nb_get_retry 3
    delay_before_retry 3
}
}

}

LvsBakr配置

global_defs {
    notification_email {
     540621626@qqq.com
    }
    notification_email_from 540621626@qq.com
   smtp_server 192.168.200.1
   smtp_connect_timeout 30
    router_id LVS_DEVEL
}

vrrp_sync_group test {
group {
loadbalance
}
}

vrrp_instance loadbalance {
    state BACKUP
    interface eth0
    virtual_router_id 51
    priority 99
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.10.115
    }
}

virtual_server 192.168.10.115 80 {
    delay_loop 6
    lb_algo rr
    lb_kind DR
    protocol TCP

    real_server 192.168.10.121 80 {
        weight 1
        TCP_CHECK {
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
        }
    }

    real_server 192.168.10.122 80 {
    weight 1
TCP_CHECK {
    connect_timeout 3
    nb_get_retry 3
    delay_before_retry 3
}
    }
}

④ 启动keepalived

LvsMastrer: /etc/init.d/keepalived start

LvsBak     :  /etc/init.d/keepalived  start 

查看启动状态

LvsMaster: tail -f /var/log/messages

       LvsBak: tail -f /var/log/messages

LvsMaster： ip addr

       LvsMaster: ipvsadm 

       LvsBak：ip addr

LvsBak：ipvsadm

3. 设置RealServer1和RealServer2

① 编辑RealServe脚本

② 在RealServer1和RealServer2上安装apache

4. 測试负载均衡和双机热备

5. 配置过程中应注意的问题