Centos7.2系统下64位LVS+Keeplived高可用多实例安装部署教程，centos7.2lvs


Centos7.2系统下64位LVS+Keeplived高可用多实例安装部署教程

系统:centos7.2 需要的软件包:mysql-5.6.22.tar.gz

环境准备:服务器:192.10.30.10、服务器:192.10.30.11、服务器:192.10.30.12

一.实践环境

三台服务器，一台做lvs+keepalived，两台是lvs_web,因为只有三台机器环境测试所以lvs+keepalived没有做heartbeat来做备份

DB---------------------------------192.10.30.12

Lvs_web01------------------------192.10.30.10

Lvs_web02------------------------192.10.30.11

Web_vip---------------------------192.10.30.39

Mycat_vip--------------------------192.10.30.49

二．安装步骤

0、安装LVS前系统需要安装

yum -y install openssl-devel lftplibnl* popt* libnl* libpopt*gcc* libipset* makepcre pcre-devel kernel-devel libnl-devel popt-devel

1．安装ipvsadm

yum -y install ipvsadm

2.安装keepalived

yum -y install keepalived

3. 配置keepalived启动:

#systemctl enable keepalived.service

#systemctl start keepalived.service

#systemctl status keepalived.service

------------------------------------------------------------------------------------------------

2、开启路由转发（路由转发模式需要配置，NAT模式不需要配置此项）

vi /etc/sysctl.conf

修改下面的值，从0修改到1：

net.ipv4.ip_forward = 1

刷新系统变量,使系统文件变更马上生效

sysctl -p

----------------------------------------------------------------------------------------------------

3、配置Keepalived

vi /etc/keepalived/keepalived.conf

删除所有内容，在LVS-MASTER中输入以下内容：

[root@PC11 init.d]# cat /etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_defs {

notification_email {

root@localhost

}

notification_email_fromAlexandre.Cassen@firewall.loc

smtp_server 127.0.0.1

smtp_connect_timeout 30

router_id LVS_10

vrrp_skip_check_adv_addr

vrrp_strict

vrrp_garp_interval 0

vrrp_gna_interval 0

}

vrrp_instance VI_1 {

state BACKUP

interface eno16777728

virtual_router_id 51

priority 90

advert_int 1

authentication {

auth_type PASS

auth_pass 1111

}

virtual_ipaddress {

192.10.30.39/24 dev eno16777728 labeleno16777728:1

}

}

virtual_server 192.10.30.39 80 {

delay_loop 6

lb_algo wrr

lb_kind DR

nat_mask 255.255.255.0

persistence_timeout50

protocol TCP

real_server192.10.30.10 80 {

weight 1

TCP_CHECK {

connect_timeout8

nb_get_retry 3

delay_before_retry3

connect_port 80

}

}

real_server 192.10.30.1180 {

weight 1

TCP_CHECK {

connect_timeout8

nb_get_retry 3

delay_before_retry3

connect_port 80

}

}

}

vrrp_instance VI_2 {#只是在这里额外添加了一个模块

state MASTER

interface eno16777728

virtual_router_id 52

priority 90

advert_int 1

authentication {

auth_type PASS

auth_pass 2222

}

virtual_ipaddress {

192.10.30.49/24 deveno16777728 label eno16777728:2

}

}

virtual_server 192.10.30.49 8066 {

delay_loop 6

lb_algo rr

lb_kind DR

nat_mask 255.255.255.0

persistence_timeout50

protocol TCP

real_server 192.10.30.108066 {

weight 1

TCP_CHECK {

connect_timeout8

nb_get_retry 3

delay_before_retry3

connect_port 8066

}

}

real_server192.10.30.11 8066 {

weight 1

TCP_CHECK {

connect_timeout8

nb_get_retry 3

delay_before_retry3

connect_port 8066

}

}

}

[root@PC11 init.d]#

删除所有内容，在LVS-BACKUP中输入以下内容：

[root@PC10 mycat]# cat /etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_defs {

notification_email {

root@localhost

}

notification_email_fromAlexandre.Cassen@firewall.loc

smtp_server 127.0.0.1

smtp_connect_timeout 30

router_id LVS_10

vrrp_skip_check_adv_addr

vrrp_strict

vrrp_garp_interval 0

vrrp_gna_interval 0

}

vrrp_instance VI_1 {

state MASTER

interface eno16777728

virtual_router_id 51

priority 100

advert_int 1

authentication {

auth_type PASS

auth_pass 1111

}

virtual_ipaddress {

192.10.30.39/24dev eno16777728 label eno16777728:1

}

}

virtual_server 192.10.30.39 80 {

delay_loop 6

lb_algo wrr

lb_kind DR

nat_mask 255.255.255.0

persistence_timeout50

protocol TCP

real_server192.10.30.10 80 {

weight 1

TCP_CHECK {

connect_timeout8

nb_get_retry 3

delay_before_retry3

connect_port 80

}

}

real_server192.10.30.11 80 {

weight 1

TCP_CHECK {

connect_timeout8

nb_get_retry 3

delay_before_retry3

connect_port 80

}

}

}

vrrp_instance VI_2 {#只是在这里额外添加了一个模块

state BACKUP

interface eno16777728

virtual_router_id 52

priority 90

advert_int 1

authentication {

auth_type PASS

auth_pass 2222

}

virtual_ipaddress {

192.10.30.49/24 deveno16777728 label eno16777728:2

}

}

virtual_server 192.10.30.49 8066 {

delay_loop 6

lb_algo rr

lb_kind DR

nat_mask 255.255.255.0

persistence_timeout50

protocol TCP

real_server192.10.30.10 8066 {

weight 1

TCP_CHECK {

connect_timeout8

nb_get_retry 3

delay_before_retry3

connect_port 8066

}

}

real_server192.10.30.11 8066 {

weight 1

TCP_CHECK {

connect_timeout8

nb_get_retry 3

delay_before_retry3

connect_port 8066

}

}

}

[root@PC10 mycat]#

4.自动启动keepalived：

[root@hx192 ipvsadm-1.26]# chkconfig --list | grep keepalived

[root@hx192 ipvsadm-1.26]# chkconfig --add keepalived

[root@hx192 ipvsadm-1.26]# chkconfig --level 235 keepalived on

[root@hx192 ipvsadm-1.26]# chkconfig --list | grep keepalived

#service keepalived start

===下面的脚本是在WEB服务器上执行的=====================================================

在WEB1和WEB2机器上编辑如下文件

#!/bin/bash

# description: Config realserver

#Written by : http://kerry.blog.51cto.com

VIP0=192.10.30.39

VIP1=192.10.30.49

/etc/rc.d/init.d/functions

case "$1" in

start)

/sbin/ifconfig lo:0$VIP0 broadcast $VIP0 netmask 255.255.255.255 up

/sbin/ifconfig lo:1$VIP1 broadcast $VIP1 netmask 255.255.255.255 up

echo "1">/proc/sys/net/ipv4/conf/lo/arp_ignore

echo "2">/proc/sys/net/ipv4/conf/lo/arp_announce

echo "1">/proc/sys/net/ipv4/conf/all/arp_ignore

echo "2">/proc/sys/net/ipv4/conf/all/arp_announce

sysctl -p>/dev/null 2>&1

echo"RealServer Start OK"

;;

stop)

/sbin/ifconfig lo:0down

/sbin/ifconfig lo:1 down

echo "0">/proc/sys/net/ipv4/conf/lo/arp_ignore

echo "0">/proc/sys/net/ipv4/conf/lo/arp_announce

echo "0">/proc/sys/net/ipv4/conf/all/arp_ignore

echo "0">/proc/sys/net/ipv4/conf/all/arp_announce

echo"RealServer Stoped"

;;

*)

echo "Usage:$0 {start|stop}"

exit 1

esac

#exit 0

[root@PC10 init.d]#

赋给执行权限

chmod 755/etc/rc.d/init.d/functions 别人的配置文档中没这个步骤，我不知道为什么总是说执行到这句时没有权限，所以我添加了执行权限

#chmod 755 /etc/init.d/lvs_real.sh

#/etc/init.d/lvs_real.shstart

添加自动启动

echo “/etc/init.d/lvs_real.shstart” >> /etc/rc.local

==============================================================

配置两台LVS_web的apache服务，至此结束

三．测试服务

1．启动两台lvs_web的apache服务

2．启动lvs_keepalived服务器的keepalived和lvs的服务

3．访问http://192.10.30.39/并不断刷新页面开是否平均落到两台服务器上

4．停到一台lvs_web的apache服务，在访问http://192.10.30.39，看是否不是给停掉的lvs_web分请求，如果是测试成功，一切结束！！！

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