Intended as guidance for production environments with different hosts for most tasks, these instructions provide a recipe for building only the Red5 piece of an Avalon system from scratch on CentOS or Red Hat Enterprise Linux.  Recipes for the other components for Avalon may be found here.   Fedora (standalone), MySQL (standalone), Web (standalone), Solr (standalone), and Matterhorn (standalone). 

Instructions for building every component on one host (all-in-on) please see here: Manual Installation Instructions.

Ready the Installation Environment

Install EPEL

rpm -ivh http://linux.mirrors.es.net/fedora-epel/6/i386/epel-release-6-8.noarch.rpm

This package has libyaml-devel which is required by ruby and not provided by Redhat.

Make sure a valid hostname is resolvable

The default hostname is “avalon.dev”, so name the machine this and enter it into /etc/hosts

# hostname
avalon.dev
# cat /etc/hosts
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4 avalon.dev

Configure iptables 

The Avalon Media System requires several ports to be open to client browsers.

Here are the port settings that will need to be configured:

The preferred method is to create a shell script that will do the work for you. Here is an example script that you should look through and customize as needed: avalon-iptables-config.sh

Save your script to /etc/sysconfig/avalon-iptables-config.sh, make it executable and run it.

chmod +x /etc/sysconfig/avalon-iptables-config.sh
/etc/sysconfig/avalon-iptables-config.sh

If you run into connection issues you can disable the iptables, by running "service iptables stop". This will completely drop your firewall. When finished troubleshooting run "service iptables start".

Disable SELinux

echo 0 > /selinux/enforce 
vim /etc/selinux/config #change the value of `SELINUX` from `enforcing` to `permissive`

Add the NUL repository 

Create the NUL repository config file:

vim /etc/yum.repos.d/nul-public.repo

Append the following code:

[nul_public]
name=NUL Library Public RHEL repository
baseurl=http://yumrepo-public.library.northwestern.edu/x86_64
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-nul
cost=150

Install and place the NUL GPG key in the proper location:

curl http://yumrepo-public.library.northwestern.edu/RPM-GPG-KEY-nul -o /etc/pki/rpm-gpg/RPM-GPG-KEY-nul

Install development libraries and packages for building Ruby

yum groupinstall "Development Tools"
yum install readline-devel zlib-devel libyaml-devel libffi-devel openssl-devel libxml2-devel libxslt-devel ant

Red5 Media Server

Red5 is an open source alternative to Adobe Media Server. If using the Adobe Media Server you can skip to the next step.

Create a red5 user.

useradd red5
groupadd avalon

Download and install Red5.

wget http://red5.org/downloads/red5/1_0_1/red5-1.0.1.tar.gz
tar xvf red5-1.0.1.tar.gz
mv red5-server-1.0 /usr/local/red5

Download the init script and add it to the init.d directory.

wget https://raw.github.com/avalonmediasystem/avalon-installer/master/modules/red5/templates/red5_init_script.erb -O red5_init_script.sh
mv red5_init_script.sh /etc/rc.d/init.d/red5

Give Red5 permissions to the red5 directory and the init script.

chown -R red5:red5 /usr/local/red5
chmod +x /etc/rc.d/init.d/red5

Create and configure streaming directories.

mkdir -p /usr/local/red5/webapps/avalon/streams /var/avalon /var/www/avalon/public/streams /var/avalon/hls_streams
chown red5:avalon /usr/local/red5/webapps/avalon/streams
chmod 0775 /usr/local/red5/webapps/avalon/streams
ln -s /usr/local/red5/webapps/avalon/streams /var/avalon/rtmp_streams 
chown root:root /var/avalon/hls_streams/
ln -s /var/avalon/hls_streams/ /var/www/avalon/public/streams 
chmod 0775 /var/avalon/hls_streams/

Red5 Avalon Security Webapp

cd /usr/local/red5/webapps
wget https://github.com/avalonmediasystem/config-files/raw/master/red5/red5-avalon.tar.gz
tar xvzf red5-avalon.tar.gz
chown -R red5:red5 avalon/

Edit /usr/local/red5/webapps/avalon/WEB-INF/red5-web.properties

avalon.serverUrl=http://localhost/

Restart Red5

service red5 restart

If Red5 is installed and running you should be able to access http://avalon.dev:5080/

Restart SSH

service sshd restart

Restarting the Server

Before you restart your Avalon server, you'll want to make sure all of the services necessary to run Avalon will start automatically after the restart. Run these commands once and you should be set:

chkconfig --level 345 sshd on
chkconfig --level 345 red5 on
chkconfig --level 345 httpd on