Two Web servers for a load balancing solution

write in front: If this article is fortunate enough to be seen by a friend and found wrong, I hope to criticize. If you do not understand the place, we would like to discuss together.

Overall scenario

The Platform planning topology diagram is as follows:

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Overall Solutions:

Two Web services load-balance through DNS, share Server for NFS, share MySQL server through Server for NFS

Note: The next step is to build a DNS server, two Web servers, Server for NFS, and MySQL server, and in the process only give the implementation process and its steps to understand.

Building a DNS server

1. Edit the master configuration file

# vim/etc/named.conf

Options {

Directory "/var/named";

Dump-file "/var/named/data/cache_dump.db";

Statistics-file "/var/named/data/named_stats.txt";

Memstatistics-file "/var/named/data/named_mem_stats.txt";

recursion Yes;

};

Logging {

Channel Default_debug {

File "Data/named.run";

Severity dynamic;

};

};

Zone "." in {

Type hint;

File "named.ca";

};

Include "/etc/named.rfc1912.zones";

2. Edit the zone configuration file

# Vim/etc/named.rfc1912.zones

After this file, add the following:

Zone "Muluhe.com" in {

Type master;

File "Muluhe.com.zone";

};

3. Edit the positive solution database file

# Vim/var/named/muluhe.com.zone

$TTL 3600

$ORIGIN muluhe.com.

@ in SOA ns.muluhe.com. Admin.muluhe.com. (

2014081701

2H

10M

7D

1D)

In NS NS

NS in A 10.170.2.10

www in A 10.170.2.60

www in A 10.170.2.80

4. Start the service and test

# Service named restart

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[email protected] ~]# nslookup

> www.muluhe.com

Server:127.0.0.1

Address:127.0.0.1#53

Name:www.muluhe.com

address:10.170.2.80

Name:www.muluhe.com

address:10.170.2.60

Build httpd+php Server

See Building a separate Lamp server platform blog

The difference is that the supplied Discuz file of the NFS server is mounted to/var/www/php

# mount-t NFS 10.170.2.30:/discuz/var/www/php

Preferably set to boot mount

Build MySQL Server

See Building a separate Lamp server platform blog

MariaDB [(None)]> CREATE DATABASE Muluhe;

MariaDB [(None)]> GRANT all on muluhe.* to ' Muluhe ' @ ' 10.170.%.% ' identified by ' [email protected] ';

MariaDB [(None)]> FLUSH privileges;

Building an NFS server

Build NFS server, mainly to edit/etc/exports files

# Vim/etc/exports

The edited content is as follows:

/discuz 10.170.2.0/255.255.252.0 (rw)

Start the service

# Chkconfig Rpcbind on

# Chkconfig NFS On

# Chkconfig Nfslock on

# Service Rpcbind Restart

# Service NFS Restart

# Service Nfslock Restart

Provide Discuz resources

# Mkdir/discuz

Unzip the Discuz_x2.5_sc_gbk.zip file in the/discuz directory

# Unzip Discuz_x2.5_sc_gbk.zip

# CD Upload

# chmod-r Go+w config/

# chmod-r Go+w data/

# chmod-r Go+w uc_*

Installing Discuz

In the browser, type: www.muluhe.com/upload

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When you click Agree, you can get the following content

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Then click Next to get the following:

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Then click Next to get the following:

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And then next, you can get the following:

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After installation, you can get the following content

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Cond...