环境准备

安装环境：

  • LVS版本：LVS-1.4.21
  • keepalived版本：keepalived v1.3.5
  • LVS:172.24.77.241（master）
  • LVS:172.24.77.242（backup）
  • VIP地址:172.24.77.246

LVS安装:master和backup服务器安装LVS

  1. 先检查/usr/src/kernels目录下是否有文件，没有则需要安装kernels

    ll /usr/src/kernels

  2. 安装Kernels

    yum -y install kernel-devel

  3. 安装软链接检查内核版本

    ln -s /usr/src/kernels/3.10.0-957.27.2.el7.x86_64/ /usr/src/linux

  4. 检查内核模块，看一下ip_vs 是否被加载

    lsmod |grep ip_vs

    !如果没有则运行以下命令

    modprobe ip_vs

  5. 安装依赖插件

    yum install libnl libpopt -y

    yum install popt-static -y

  6. 安装ipvsadm

    cd /usr/src

    wget -c http://www.linuxvirtualserver.org/software/kernel-2.6/ipvsadm-1.26.tar.gz

    tar -xzvf ipvsadm-1.26.tar.gz

    cd ipvsadm-1.26

    make

    make install

  7. 检查安装是否成功

    whereis ipvsadm

  8. ipvsadm配置：添加虚拟服务器IP，添加readlserver后端服务

    ipvsadm -A -t 172.24.77.246:80 -s rr

    ipvsadm -a -t 172.24.77.246:80 -r 172.24.77.241 -g -w2

    ipvsadm -a -t 172.24.77.246:80 -r 172.24.77.242 -g -w2

  9. 查看LVS ipvsadm配置参数

    ipvsadm -Ln

  10. LVS服务器绑定VIP地址

    ifconfig lo:0 172.24.77.246 netmask 255.255.255.0

  11. 查看地址是否添加成功

    ip addr |grep 246

    Keepalive安装:master和backup服务器安装Keepalive

  12. 安装keepalive

    yum install keepalived -y

  13. 查看安装版本信息

    rpm -qi keepalived

  14. 配置Keepalived，master配置如下

    vim /etc/keepalived/keepalived.conf

    ！删除多余配置

    :35,156d

    ！修改为以下内容

    ! Configuration File for keepalived

    global_defs {
    notification_email {br/>root@locahost
    }
    notification_email_from keepalived@localhost
    smtp_server 127.0.0.1
    smtp_connect_timeout 30
    router_id ha1.jay.com
    vrrp_skip_check_adv_addr
    vrrp_strict
    vrrp_garp_interval 0
    vrrp_gna_interval 0
    vrrp_mcast_group4 224.0.0.18
    }

    vrrp_instance VI_1 {
    state MASTER
    interface ens33
    virtual_router_id 80
    priority 100
    advert_int 1
    authentication {
    auth_type PASS
    auth_pass silence2t
    }virtual_ipaddress {
    172.24.77.246 dev ens33 lable ens33:0
    }

    vrrp_script chk_LVS{

    ​ script "/data/sh/check_LVS.sh"

    ​ interval 2

    ​ weight 2

    }

    virtual_server 172.24.77.246 80 {

    delay_loop 6

    lb_algo wrt

    lb_kind DR

    persistence_timeout 60

    protocol TCP

    read_server 172.24.77.241 80 {

weight 100

TCP_CHECK {

connect_timeout 10

nb_get_retry 3

delay_before_retry 3

connect_port 80

}

    }

    read_server 172.24.77.242 80 {

weight 100

TCP_CHECK {

connect_timeout 10

nb_get_retry 3

delay_before_retry 3

connect_port 80

    ​ }

    }

  15. 配置Keepalived，backup配置如下

    vim /etc/keepalived/keepalived.conf

    ！删除所有配置

    :%d

    ！粘贴以下内容

    ! Configuration File for keepalived

    global_defs {
    notification_email {br/>root@locahost
    }
    notification_email_from keepalived@localhost
    smtp_server 127.0.0.1
    smtp_connect_timeout 30
    router_id ha1.jay.com
    vrrp_skip_check_adv_addr
    vrrp_strict
    vrrp_garp_interval 0
    vrrp_gna_interval 0
    vrrp_mcast_group4 224.0.0.18
    }

    vrrp_instance VI_1 {
    state BACKUP
    interface ens33
    virtual_router_id 80
    priority 100
    advert_int 1
    authentication {
    auth_type PASS
    auth_pass silence2t
    }virtual_ipaddress {
    172.24.77.246 dev ens33 lable ens33:0
    }

    vrrp_script chk_LVS{

    ​ script "/data/sh/check_LVS.sh"

    ​ interval 2

    ​ weight 2

    }

    virtual_server 10.206.35.253 80 {

    delay_loop 6

    lb_algo wrt

    lb_kind DR

    persistence_timeout 60

    protocol TCP

    read_server 172.24.77.241 80 {

weight 100

TCP_CHECK {

connect_timeout 10

nb_get_retry 3

delay_before_retry 3

connect_port 80

}

    }

    read_server 172.24.77.242 80 {

weight 100

TCP_CHECK {

connect_timeout 10

nb_get_retry 3

delay_before_retry 3

connect_port 80

    ​ }

    }

  16. 查看VIP地址

    ip addr

  17. 查看Iptalbes策略并删除

    iptables -vnL --line-number

    iptables -D INPUT 1

  18. 测试访问VIP

    ping 172.24.77.246

  19. 测试keepalive高可用

  20. check_LVS.sh脚本内容如下：

    ！将占有VIP地址的主机关机，查看

    systemctl stop keepalived

    killall keepalived