Configure a high-availability cluster in centos

I. Overview:


System: centos5.0



Cluster software: heartbeat



Node 1ip (
Master
): 192.168.1.105



Node 2ip (
Slave
): 192.168.1.106



Virtual IP: 192.168.1.102


In Node 1
Use on
Uname-n
The result must be
Node01
, In the node
2
Use the same
Uname-n
The result must also be
Node02
.
IP 192.168.1.102
Is a virtual
IP
For
Webserver
.



Ii. download and install the software package and Configuration:


1. The following software packages are required:



Heartbeat-1, 2.1.2


Heartbeat-1, 2.1.2


Heartbeat-stonith-2.1.2


You can also use Yum-y install heartbeat
The attachment is the required software package:



File:



Heartbeat.rar size
: 2627kb
Download
:
Download



2. Configure on each node
Heartbeat
, You must have the following three files:
:



Authkeys,
Ha. cf
,
Haresources
, They exist in
/Etc/ha. d/
Directory.



3. Create the three files mentioned above:



CP/usr/share/doc/heartbeat-2.1.2/authkeys/etc/ha. d/


CP/usr/share/doc/heartbeat-2.1.2/ha. Cf/etc/ha. d/


CP/usr/share/doc/heartbeat-2.1.2/haresources/etc/ha. d/


4. Configuration:



4.1 Edit
Authkeys
File
:



VI/etc/ha. d/authkeys


Add the following line: here we use the second authentication method (shal)



Auth 2


2 sha1 test-ha


Then, change the File Permission to 600.
:



Chmod 600/etc/ha. d/authkeys


4.2 Edit
/Etc/ha. d/ha. cf
File
:



Add the following lines to VI/etc/ha. d/ha. Cf:



Logfile/var/log/ha-Log


Logfacility local0


Keepalive 2


Deadtime 30


Initdead 120


Bcast eth0


Udpport 694


Auto_failback on


Node node01


Node node02


4.3 Edit
/Etc/ha. d/haresources
File:



This file contains the high availability of the service. Here we use httpd;



VI/etc/ha. d/haresources joins the following link:



Node01 172.16.4.82 httpd


4.4.
Node01
On
/Etc/ha. d/
Directory copy to Node
Node02
On
/Etc
Directory.



SCP-r/etc/ha. d/192.168.102.x :/


4.5.
Httpd. conf
Add the following lines to the file:



VI/etc/httpd/CONF/httpd. conf


Listen 192.168.1.102: 80


4.6 set nodes
Node01
On
/Etc/httpd/CONF/httpd. conf
Copy files to nodes
Node02
In the corresponding directory:



SCP/etc/httpd/CONF/httpd. conf 192.168.102.x :/


4.7 create one on the two nodes
Index
File to test:



In node01
On:



Echo "node01 Apache test server">/var/www/html/index.html


In node02
On:



Echo "node02 Apache test server">/var/www/html/index.html


4.8 start on both nodes
Heartbeat:



/Etc/init. d/heartbeat start


4.9.
Node01
Open a browser: Enter

Http: // 192.168.1.102


Press enter and you will see


Node01 Apache test Server


4.10 stop
Node01
On
Heartbeat
Process, and then

In
Enter http: // 192.168.1.102 in the browser
Press enter and you will see
Node02 Apache test server.



Iii. Supplement:


You do not need to create a virtual network interface or configure an IP address.
(
192.168.1.102
) To it, because
Heartbeat
Will help us to complete and start
Httpd server
.