LVS+Keepalive高可用集群安装与配置

Posted 2020-12-13

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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

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
安装Kernels

yum -y install kernel-devel
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
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
安装依赖插件

yum install libnl libpopt -y

yum install popt-static -y
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
检查安装是否成功

whereis ipvsadm
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
查看LVS ipvsadm配置参数

ipvsadm -Ln
LVS服务器绑定VIP地址

ifconfig lo:0 172.24.77.246 netmask 255.255.255.0
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
安装keepalive

yum install keepalived -y
查看安装版本信息

rpm -qi keepalived
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
```
? }

}

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

? }

}