Centos7.2 64-bit LVS + Keeplived high-availability multi-instance installation and deployment tutorial, centos7.2lvs

Centos7.2 64-bit LVS + Keeplived high-availability multi-instance installation and deployment tutorial, centos7.2lvs

How to install and deploy 64-bit LVS + Keeplived high-availability multi-instance in Centos7.2

Software packages required for system: centos7.2: mysql-5.6.22.tar.gz

Environment preparation: SERVER: 192.10.30.10, server: 192.10.30.11, server: 192.10.30.12

I. Practice Environment

Three servers, one for lvs + keepalived, and two for lvs_web. Because only three servers are tested in the environment, lvs + keepalived does not perform heartbeat for backup.

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

Ii. Installation Steps

0. The system must be installed before LVS is installed.

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

1. Install ipvsadm

Yum-y install ipvsadm

2. Install keepalived

Yum-y install keepalived

3. Configure keepalived to start:

# Systemctl enable keepalived. service

# Systemctl start keepalived. service

# Systemctl status keepalived. service

Bytes ------------------------------------------------------------------------------------------------

2. Enable route forwarding. This option is not required in the NAT mode)

Vi/etc/sysctl. conf

Modify the following values from 0 to 1:

Net. ipv4.ip _ forward = 1

Refresh system variables to make System File changes take effect immediately

Sysctl-p

Bytes ----------------------------------------------------------------------------------------------------

3. Configure Keepalived

Vi/etc/keepalived. conf

Delete all content and enter the following in the LVS-MASTER:

[Root @ PC11 init. d] # cat/etc/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 {# added an additional module here

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] #

Delete all content and enter the following in the LVS-BACKUP:

[Root @ PC10 mycat] # cat/etc/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

Priority100

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 {# added an additional module here

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. Automatically Start 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

=== The following script is executed on the WEB server ======================== ======================================

Edit the following file on the WEB1 and WEB2 machines:

#! /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: 0 down

/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] #

Grant execution permission

Chmod 755/etc/rc. d/init. d/functions other people's configuration documents do not have this step. I don't know why I always say I have no permission to execute this sentence, so I added the execution permission.

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

#/Etc/init. d/lvs_real.shstart

Add auto start

Echo "/etc/init. d/lvs_real.shstart">/etc/rc. local

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

Configure two LVS_web apache services.

Iii. Test services

1. Start two lvs_web apache services

2. Start the keepalived and lvs services of the lvs_keepalived server.

3. Access http: // 192.10.30.39/and constantly refresh the page to see if the page is evenly mounted to two servers

4. Stop an apache service of lvs_web. visit http: // 192.10.30.39 to see if it is not a stopped lvs_web score request. If the test is successful, everything is over !!!