Nginx+keepalived primary and Standby load Balancing learning Notes

Lab environment and software version:

CentOS version: 6.6 (2.6.32.-504.el6.x86_64)

nginx Version: nginx-1.6.2

Keepalived version: keepalived-1.2.7

Preparatory work:

Shut down firewall: Service iptables stop

Chkconfig iptables off

Close Selinux:sed-i ' s/selinux=disabled/selinux=enforcing/g '/etc/selinux/config

Init 6 reboot system must be!

1. Prepare to install the dependent packages:

Yum-y install pcre pcre-devel OpenSSL openssl-devel zlib zlib-devel gcc gcc-c++ popt-devel

Installation keepalived appears configure:error:Popt libraries is required

Workaround: Yum-y Install Popt-devel

2. Download the installation package

wget http://nginx.org/download/nginx-1.6.2.tar.gz

wget http://www.keepalived.org/software/keepalived-1.2.7.tar.gz

3. Installing Nginx

Tar zxvf nginx-1.6.2.tar.gz

CD nginx-1.6.2

./configure

Make && make install

4. Installing keepalived

Tar zxvf keepalived-1.2.7.tar.gz

CD keepalived-1.2.7

./configure

Make

Make install

cp/usr/local/etc/rc.d/init.d/keepalived/etc/rc.d/init.d/

cp/usr/local/etc/sysconfig/keepalived/etc/sysconfig/

Mkdir/etc/keepalived

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

cp/usr/local/sbin/keepalived/usr/sbin/

5. Join the boot-up service

Method One

echo "/usr/local/nginx/sbin/nginx" >>/etc/rc.local

echo "/etc/init.d/keepalived start" >>/etc/rc.local

Method Two

[email protected] keepalived-1.2.7]# cat >>/etc/rc.local<<eof

>/usr/local/nginx/sbin/nginx

>/etc/init.d/keepalived Start

> EOF

[Email protected] keepalived-1.2.7]# cat/etc/rc.local

#!/bin/sh

#

# This script is executed *after* all and the other init scripts.

# can put your own initialization stuff in here if you don ' t

# want to does the full Sys V style init stuff.

Touch/var/lock/subsys/local

/usr/local/nginx/sbin/nginx

/etc/init.d/keepalived start

6. Configuration

6.1 Configuring Nginx

The Nginx configuration of the two access servers is exactly the same, with the main configuration/usr/local/nginx/conf/nginx.conf http. Where multi-domain points are implemented through a virtual host (server configured under HTTP); Different virtual directories of the same domain name are passed through each

Different location implementations under each server.

HTTP {

Include Mime.types;

Default_type Application/octet-stream;

#log_format Main ' $remote _addr-$remote _user [$time _local] "$re

Quest "'

# ' $status $body _bytes_sent ' $http _referer '

# ' "$http _user_agent" "$http _x_forwarded_for" ';

#access_log Logs/access.log Main;

Sendfile on;

#tcp_nopush on;

#keepalive_timeout 0;

Keepalive_timeout 65;

#gzip on;

Upstream myserver{

Server 192.168.0.110:80 max_fails=3 fail_timeout=20s;

Server 192.168.0.111:80 max_fails=3 fail_timeout=20s;

Ip_hash;

}

server {

Listen 80;

server_name 192.168.0.150;

#charset Koi8-r;

#access_log Logs/host.access.log Main;

Location/{

root/var/www/html;

Index index.php index.htm index.html;

Proxy_redirect off;

Proxy_set_header Host $host;

Proxy_set_header X-real-ip $remote _addr;

Proxy_next_upstream http_500 http_502 http_503 Error Timeo

UT invalid_header;

Proxy_set_header x-forwarded-for $remote _addr;

Proxy_pass http://MyServer;

}

}

6.2 Configuring Keepalived

According to the installation method above, the keepalived configuration file is/etc/keepalived/keepalived.conf. master, slave server

Configuration is associated but different. As follows:

Master:

! Configuration File for Keepalived

Global_defs {

Notification_email {

[Email protected]

[Email protected]

[Email protected]

}

Notification_email_from [email protected]

Smtp_server smtp.etiantian.org

Smtp_connect_timeout 30

router_id Nginx_master

}

Vrrp_instance Vi_1 {

State MASTER

Interface eth0

VIRTUAL_ROUTER_ID 51

Priority 100

Advert_int 1

Authentication {

Auth_type PASS

Auth_pass 1111

}

virtual_ipaddress {

192.168.0.150

}

}

Backup:

! Configuration File for Keepalived

Global_defs {

Notification_email {

[Email protected]

[Email protected]

[Email protected]

}

Notification_email_from [email protected]

Smtp_server smtp.etiantian.org

Smtp_connect_timeout 30

router_id Nginx_backup

}

Vrrp_instance Vi_1 {

State BACKUP

Interface eth0

VIRTUAL_ROUTER_ID 51

Priority 99

Advert_int 1

Authentication {

Auth_type PASS

Auth_pass 1111

}

virtual_ipaddress {

192.168.0.150

}

}

7. Verify that:

Start/usr/local/nginx/sbin/nginx on the master and slave servers successively

/etc/init.d/keepalived start

To see if a virtual IP (VIP) is already bound on the primary server: IP addr

[[Email protected] ~]# IP addr

1:lo: <LOOPBACK,UP,LOWER_UP> MTU 65536 qdisc noqueue State UNKNOWN

Link/loopback 00:00:00:00:00:00 BRD 00:00:00:00:00:00

inet 127.0.0.1/8 Scope host Lo

INET6:: 1/128 Scope Host

Valid_lft Forever Preferred_lft Forever

2:eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> MTU Qdisc pfifo_fast State up Qlen 1000

Link/ether 00:0c:29:af:00:4e BRD FF:FF:FF:FF:FF:FF

inet 192.168.0.130/24 BRD 192.168.0.255 Scope Global eth0

inet 192.168.0.150/32 Scope Global eth0

Inet6 FE80::20C:29FF:FEAF:4E/64 Scope link

Valid_lft Forever Preferred_lft Forever

Stop keepalived:/etc/init.d/keepalived stop on the primary server and then check from the server to see if it is already tied

Virtual IP (VIP):

[[Email protected]_back ~]# IP Addr

1:lo: <LOOPBACK,UP,LOWER_UP> MTU 65536 qdisc noqueue State UNKNOWN

Link/loopback 00:00:00:00:00:00 BRD 00:00:00:00:00:00

inet 127.0.0.1/8 Scope host Lo

INET6:: 1/128 Scope Host

Valid_lft Forever Preferred_lft Forever

2:eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> MTU Qdisc pfifo_fast State up Qlen 1000

Link/ether 00:0C:29:21:B6:B1 BRD FF:FF:FF:FF:FF:FF

inet 192.168.0.131/24 BRD 192.168.0.255 Scope Global eth0

inet 192.168.0.150/32 Scope Global eth0

Inet6 FE80::20C:29FF:FE21:B6B1/64 Scope link

Valid_lft Forever Preferred_lft Forever

Start keepalived:/etc/init.d/keepalived on the primary server and see if the primary server can re-take over the virtual IP (VIP)

[[Email protected] ~]# IP addr

1:lo: <LOOPBACK,UP,LOWER_UP> MTU 65536 qdisc noqueue State UNKNOWN

Link/loopback 00:00:00:00:00:00 BRD 00:00:00:00:00:00

inet 127.0.0.1/8 Scope host Lo

INET6:: 1/128 Scope Host

Valid_lft Forever Preferred_lft Forever

2:eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> MTU Qdisc pfifo_fast State up Qlen 1000

Link/ether 00:0c:29:af:00:4e BRD FF:FF:FF:FF:FF:FF

inet 192.168.0.130/24 BRD 192.168.0.255 Scope Global eth0

inet 192.168.0.150/32 Scope Global eth0

Inet6 FE80::20C:29FF:FEAF:4E/64 Scope link

Valid_lft Forever Preferred_lft Forever

This article is from the "Lanzhou Linux operation and Maintenance" blog, please be sure to keep this source http://linuxzkq.blog.51cto.com/9379412/1631209

Nginx+keepalived primary and Standby load Balancing learning Notes