Lullabot Rock Solid Day 1

Firewall

Note that in some versions of CentOS, a firewall is installed by default which will block access to port 80, on which Apache runs. The following command will open this port and save the rule to iptables.

iptables -I RH-Firewall-1-INPUT -p tcp --dport http -j ACCEPT
service iptables save

PHP5 Install

Drupal is written in PHP. Let's move on to the PHP5 install.  As before, due to using yum to install PHP5, any dependencies are taken care of:

CentOS/RHEL doesn't support a version of PHP we can use, so we have to use an alternate repository. The current leading repository for PHP 5.2 on CentOS is the jasonlitka.com repository. We use this repository because most others have moved on to PHP 5.3.x

rpm --import http://www.jasonlitka.com/media/RPM-GPG-KEY-jlitka

then create the file /etc/yum.repos.d/jasonlitka.repo with these contents (the last line says use it only for php):

[utterramblings]
name=JasonLitka Repo
baseurl=http://www.jasonlitka.com/media/EL$releasever/$basearch/
enabled=1
gpgcheck=1
gpgkey=http://www.jasonlitka.com/media/RPM-GPG-KEY-jlitka
includepkgs=php* mysql=*

Now install the php pieces we need:
yum install php php-common php-cli php-gd php-mcrypt php-pear php-mhash php-mysql php-xml php-mbstring

Once done, do a quick Apache restart:

service httpd restart

Test that PHP is working by creating a test page.

echo "<?php phpinfo();" > /var/www/html/phpinfo.php
chmod 644 /var/www/html/phpinfo.php

Navigate to your new index.php page, you will see the PHP info screen.

http://<hostname_or_ip>/phpinfo.php


PhpMyAdmin

Installation: We need EPEL

To install phpMyAdmin using yum we will need to include the EPEL (Extra Packages for Enterprise Linux) repository. This repository was developed by the Fedora community to provide extra add-on packages for Fedora-based Redhat Enterprise Linux and it's other compatible offspring such as CentOS.

One thing to keep in mind when adding extra repositories is that many include newer versions of packages that are readily available through the standard channels. This can cause problems as packages can be automatically upgraded and cease to function as expected.

I want to make it clear that the EPEL repository is purely complimentary and only provides additional packages that are otherwise unavailable through the default repositories.

Let's begin by installing the EPEL repository:

rpm -Uvh http://download.fedora.redhat.com/pub/epel/5Server/x86_64/epel-release-5-4.noarch.rpm

TIP: If for some reason you need to deleted a repository, run: rpm -e epel-release-5-4.noarch.rpm

Install phpMyAdmin

yum install phpmyadmin

Edit /etc/httpd/conf.d/phpMyAdmin.conf to allow access from non-localhost clients.
Edit /etc/phpMyAdmin/config.inc.php to add additional servers and use the "mysqli" driver for connections.

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