Q. What is PXE Boot Server ?

-- PXE Server, stands for preboot Execution Environment, is used to Enable a Network Computer to boot only from a Network interface card.

PXE Environment needs Following Services :

1. DHCP server that distributes the IP addresses to the client systems.
2. TFTP Server which makes bootable images available to be downloaded via network using
    Trivial File Transfer Protocol (TFTP).
3. Syslinux package which provides bootloaders for network booting.
4. http/ftp (any one) which will host the local mounted mirrored DVD (RHEL/CentOS6) image,
    from where the installer will extract its required packages.

PXE Server Details :

OS: CentOS 6.5 Minimal Installation
IP Address: 192.168.1.52/24
Hostname: pxe.domain.com
SELinux Disabled on PXE Server
IPtables Stopped on PXE Server

Step: 1. Bind Hosts File :

# vi /etc/hosts

192.168.1.50    pxe.domain.com    pxe

-- Save & Quit (:wq)

Step: 2. Disable Selinux & Stop Firewall :

# vi /etc/sysconfig/selinux

SELINUX=disabled

-- Save & Quit (:wq)

# service iptables stop
# chkconfig iptables off

Step: 3. Reboot the System :

# init 6

Step: 4. Install DHCP-Server, SYSLINUX Bootloaders, TFTP-Server, Web-Server 
                 (Apache httpd),  FTP-Server (Optional) :

# yum -y install dhcp tftp-server syslinux http ftp vsftpd

Step: 5. Configure HTTP/FTP Server :

# mkdir /var/lib/tftpboot/centos6
# mount -o loop /tmp/CentOS-6.iso /var/lib/tftpboot/centos6

# vi /etc/httpd/conf.d/pxeboot.conf

Alias /centos6 /var/lib/tftpboot/centos6
<Directory /var/lib/tftpboot/centos6>
      Options Indexes FollowSymLinks
          Order Allow,Deny
          Allow from all
</Directory>

-- Save & Quit (:wq)

# service httpd start
# chkconfig httpd on

Step: 6. Manually Browse to the Server IP & Verify if you can see all the Files :

http://192.168.1.50/centos6/

Step: 7. Enable the tftp Service in Xinetd :

# cp -r /usr/share/syslinux/* /var/lib/tftpboot/
# vi /etc/xinetd.d/tftp

service tftp
{
    socket_type       = dgram
    protocol               = udp
    wait                        = yes
    user                        = root
    server                    = /usr/sbin/in.tftpd
    server_args        = -s /var/lib/tftpboot
    disable                 = no
    per_source         = 11
    cps                          = 100 2
    flags                      = IPv4
}

-- Save & Quit (:wq)

# service xinetd start
# chkconfig xinetd on

Step: 8. Configure PXE Boot Server :

# mkdir /var/lib/tftpboot/pxelinux.cfg
# vi /var/lib/tftpboot/pxelinux.cfg/default

default menu.c32
prompt 0
timeout 300
ONTIMEOUT local
menu title ########## PXE Boot Menu ##########
label 1
menu label ^1) Install CentOS 6 Edition
kernel centos6/images/pxeboot/vmlinuz
append initrd=centos6/images/pxeboot/initrd.img method=http://192.168.1.52/centos6 devfs=nomount
label 2
menu label ^2) Boot from local drive localboot

-- Save & Quit (:wq)

Step: 9. Configure DHCP Server :

# vi /etc/sysconfig/dhcpd

DHCPDARGS=eth0

-- Save & Quit (:wq)

# vi /etc/dhcp/dhcpd.conf

option domain-name "pxe.domain.com";
option domain-name-servers 192.168.1.1, 8.8.8.8;
default-lease-time 600;
max-lease-time 7200;
log-facility local7;

subnet 192.168.1.0 netmask 255.255.255.0 {
    range 192.168.1.240 192.168.1.254;
    option routers 192.168.1.1;
    option broadcast-address 192.168.1.255;
}
allow booting;
    allow bootp;
    next-server 192.168.1.50;            # PXE Server IP Address.
    filename "pxelinux.0";

-- Save & Quit (:wq)

# service dhcpd restart
# service xinetd restart
# service httpd restart

# chkconfig dhcpd on
# chkconfig xinetd on

Note:

KERNEL - Defines the location from where the PXELINUX bootloader will load.
APPEND - Defines the location for PXE initrd image file to load.
FTP Server - There is not much Change for ftp server just replace the below line in the above file.

APPEND initrd=centos6/images/pxeboot/initrd.img method=ftp://192.168.1.6/centos6/ devfs=nomount


# mkdir /var/lib/tftpboot/centos6
OR
# mkdir /var/ftp/pub/centos6

# vi /etc/vsftpd/vsftpd.conf

anonymous_enable=YES
anon_root=/var/lib/tftpboot/centos6 # Specify the path

-- Save & Quit (:wq)

# service vsfptd restart
# chkconfig vsftpd on

ftp://192.168.1.50/centos6/

Step: 10. PXE Client Configuration :

The Client may be any System that has Network boot Enabled Option (PXE boot). You can Enable this Option in your BIOS Settings. That’s it. Now, power on the Virtual client system.

Once you have Reached PXE Menu, Choose your CentOS 6 Installation Type, hit Enter key & Continue with the Installation Procedure the same way as you might Install it from a Local Media Boot Device.

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Q. What is iTop?

-- iTop, stands for IT Operational Portal, is an Open Source web based application for the day to day operations of an IT environment. iTop was designed with the ITIL best practices in mind but does not dictate any specific process, the application is flexible enough to adapt to your processes whether you want rather informal and pragmatic processes or a strict ITIL aligned behaviour.

• Using iTop you can :

- Document your entire IT infrastructure assets such as servers, applications, network devices,
   virtual machines, contacts.. etc.
- Manage incidents, user requests, planned outages.
- Document IT services and contracts with external providers including service level agreements.
- Export all the information in a manual or scripted manner.
- Import or synchronize/federate any data from external systems.

• Features :

- Fully configurable CMDB.
- HelpDesk and Incident Management.
- Service and Contract Management.
- Change Management.
- Configuration Management.
- Automatic SLA management.
- Automatic impact analysis.
- CSV import tool for all data.
- Consistency audit to check data quality.
- Data synchronization (data federation).

Configuration :

Step: 1. Install EPEL Repo :

# yum -y install epel-release

Step: 2. Install Apache Server :

# yum -y install httpd httpd-devel mod_ssl wget

Step: 3. Start Apache Server :

# service httpd restart
# chkconfig httpd on

Step: 4. Install Mysql Server :

# yum -y install mysql mysql-server mysql-devel

Step: 5. Set MySQL Root Password :

# service mysqld restart
# chkconfig mysqld on

# mysql_secure_installation

Step: 6. Install PHP5 Scripting Language :

# yum -y install php php-mysql php-common php-gd php-mbstring php-mcrypt php-devel \
   php-xml php-imap php-ldap php-mbstring php-odbc php-pear php-xmlrpc php-soap \
   php-cli graphviz

Step: 7. We need to Adjust the following PHP Settings :

# vi /etc/php.ini

post_max_size = 32M

-- Save & Quit (:wq)

Step: 8. Restart Apache Server To Load the New Configuration :

# service httpd restart

Step: 9. Download & Install iTop :

# yum -y install zip unzip
# cd /var/www/html
# wget http://sourceforge.net/projects/itop/files/itop/2.0.2/iTop-2.0.2-1476.zip
# unzip iTop-2.0.2-1476.zip
# mv web itop
# rm -rf iTop-2.0.2-1476.zip INSTALL LICENSE README

Step: 10. Create the following Directory & Make them to be Writable :

# mkdir /var/www/html/itop/conf
# mkdir /var/www/html/itop/data
# mkdir /var/www/html/itop/env-production
# mkdir /var/www/html/itop/log
# chmod 777 /var/www/html/itop/conf/
# chmod 777 /var/www/html/itop/data
# chmod 777 /var/www/html/itop/env-production/
# chmod 777 /var/www/html/itop/log

Step: 11. Finally, Install iTop Using Web Browser :

http://Server_ip_address/itop

-- Click on "Continue"
-- Select "Install a New iTOP"
-- Click on "Next"
-- I Accept the Agreement.
-- Click Next
-- MySQL Sever Details :
     Server Name: localhost,
     Login: root,
     Password: redhat

Database :

Select Create a new Database: itopdb
-- Click Next.

Administrator Account :

Login: admin
Password: Passw0rd
Confirm password: Passw0rd

-- Language: English
-- Click Next.

Sample Data :

If you directly use it in production environment, then select the second option and Click Next. I want to populate my database with some demo data’s, so checked the first option.

-- Click Next.
-- Click Next.
-- Select "Service Management for Enterprises"
-- Click Next.
-- Select "ITIL Compliant Tickets Management" & Check 'User Request Management' &  
     'Incident Management'
-- Then Click Next
-- Select "ITIL Change Management"
-- Click Next.
-- Check Both Option 'Known Errors Management' & 'Problem Management'
-- Click Next.
-- Click Install.
-- Finally Click on Enter iTop.

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Q. What is Joomla?

-- Joomla is a popular Open Source Content Management System (CMS) tool which allows us to easily build dynamic website and manage online applications. It also manage & publish your website contents like video, pictures, articles on the website. Joomla is freely available, which supports huge third party plug-ins and themes. With the help of Content Management System (CMS), you can set up websites in the World Wide Web (WWW) without having knowledge of programming.

Step: 1. Set Host Name :

# hostname joomla.domain.com
# vi /etc/sysconfig/network

HOSTNAME=joomla.domain.com

-- Save & Quit (:wq)

Step: 2. Bind Hosts File :

# vi /etc/hosts

10.100.99.214           joomla.domain.com    joomla

-- Save & Quit (:wq)

Step: 3. Disable Selinux & Stop Firewall :

# vi /etc/sysconfig/selinux

SELINUX=disabled

-- Save & Quit (:wq)

# service iptables stop
# chkconfig iptables off

Step: 4. Install NTP Server (for Time Synchronization) :

# yum -y install ntp ntpdate
# service ntpd restart
# chkconfig ntpd on
# ntpdate pool.ntp.org

Step: 5. Install Apache Server :

# yum -y install httpd httpd-devel

Step: 6. Edit httpd.conf file :

# vi /etc/httpd/conf/httpd.conf

#ServerName www.example.com:80

-- Add this Line:

ServerName ip_address_of_server:80

-- Save & Quit (:wq)

Step: 6. Download & Extract Joomla Package :

# cd /var/www/html
# wget http://joomlacode.org/gf/download/frsrelease/18323/80367/Joomla_3.1.1-Stable-Full_Package.tar.gz
# mkdir joomla
# tar zxvf Joomla_3.1.1-Stable-Full_Package.tar.gz -C joomla/

# chmod -Rf 775 joomla

Step: 7. Edit the 'httpd.conf' File :

# vi /etc/httpd/conf/httpd.conf

-- Add those Lines :

<Directory /var/www/html/joomla>
    Options -Indexes +Multiviews
       DirectoryIndex index.php index.html
    AllowOverride All
    Allow from all
</Directory>

-- Save & Quit (:wq)

Step: 8. Install MySQL Database Server :

# yum -y install mysql mysql-server mysql-devel

Step: 9. Start MySQL Service :

# service mysqld start
# chkconfig mysqld on

Step: 10. Setup MySQL Root Password :

# mysql_secure_installation

Step: 11. Create Database & User for Joomla :

# mysql -u root -p

-- Give root Password.

Mysql> create database joomladb character set utf8;
Mysql> grant all privileges on joomla.* to joomla@'localhost' identified by 'password';
Mysql> grant all privileges on joomla.* to joomla@'%' identified by 'password';
Mysql> flush privileges;
Mysql> exit

Step: 12. Install PHP5 Scripting Language :

# yum -y install epel-release
# yum -y install php php-devel php-cli php-mysql php-common php-gd php-mbstring \
   php-mcrypt php-imap php-xml php-xmlrpc

Step: 13. Check php Configuration :

# vi /var/www/html/info.php

<?php
  phpinfo();
?>

-- Save & Quit (:wq)

Step: 14. Restart Apache to Load php :

# service httpd restart
# chkconfig httpd on

Step: 15. Then Point your Browser to http://ip_address/info.php :

Ex- http://10.100.99.214/info.php

Step: 16. Configure Joomla Server through Web Browser :

Go to http://10.100.99.214/joomla

-- Select Language: English
-- Site Name: Koushik's World
     Admin Email: kchatterjee@domain.com
-- Admin Username: admin
     Admin Password: Passw0rd
     Confirm Admin Password: Passw0rd
  
-- Click Next
-- Database Type: MySQL
     Hostname: localhost
     Username: joomla
     Password: password
     Database Name: joomladb
  
-- Click Next.
-- Just Skip Ftp Configuration.
-- Click Next.
-- Select Blog English Sample Data.
-- Click Install.
-- Click on Remove Installation Folder.
-- Click on Site.

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