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====== Introduction ======

This page present a cobbler's software description :

  * installation;
  * configuration;
  * exploitation.
====== Installation ======
 
===== RHEL/CentOS/Scientific Linux =====

Cobbler is packaged for RHEL variants through the Fedora EPEL (Extra Packages for Enterprise Linux) system. Follow the directions there to install the correct repo RPM for your RHEL version and architecture. For example, on for a RHEL6.x x86_64 operating system:

<code bash>
$ sudo rpm -Uvh http://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-X-Y.noarch.rpm
</code>

Be sure to use the most recent X.Y version of the epel-release package.

Once that is complete, simply use the yum command to install the cobbler package:

<code bash>
$ sudo yum install cobbler cobbler-web
</code>

As noted above, new releases in the Fedora packaging system are held in a "testing" repository for a period of time to vet bugs. If you would like to install the most up to date version of cobbler through EPEL (which may not be fully vetted for a production environment), enable the -testing repo when installing or updating:

<code bash>
$ sudo yum install --enablerepo=epel-testing cobbler cobbler-web
</code>
or
<code bash>
$ sudo yum update --enablerepo=epel-testing cobbler cobbler-web
</code>

Once cobbler is installed, start and enable the service:

<code bash>
$ service cobblerd start
$ chkconfig cobblerd on
</code>

Then start and enable the HTTP server: 

<code bash>
$ service httpd start
$ chkconfig httpd on 
</code>

Then install, start and enable the DHCP server: 

<code bash>
$ yum install dhcp
$ service dhcpd start
$ chkconfig dhcpd on 
</code>

===== Debian/Ubuntu based distribution  =====

FIXME
====== Configuration ======

===== Relocation =====

Move the data directory that cobbler will use to generate repositories, installation configuration, and so on to a more appropriate place with a lot of disk space:

<code bash>
$ mv /var/www/cobbler /data/
$ ln -s /var/www/cobbler /data/cobbler
</code>

===== Operating system =====

The cobbler server will be connected to network via two NICs : 

<code>
---------         ---------
|cobbler|--eth1-- |E.C.   |
|server |         |network|
---------         --------- 
    |
   eth0 
    |
---------
|Install|
|network|
--------- 
</code>

Installation network IP address space is 152.31.108.0/24, ideally, it should not overlap the E.C. networks IP address space - which is not the case actually -. 
IP address space overlapping can be good only if you want to configure the NICs on each computer during the installation and just PnP the installed computer on the destination network.   

IP on the install network : 152.31.108.250\\
IP on the E.C. network : 152.31.108.168. 

===== DHCPD template =====

<code bash>
$ vi /etc/cobbler/dhcp.template
</code>

Relevant configuration block to change or adapt to your network address space: 

<code>
--- 8< --- /etc/cobbler/dhcp.template
...
subnet 192.168.1.0 netmask 255.255.255.0 {
     option routers             192.168.1.1;
     option domain-name-servers 192.168.1.210,192.168.1.211;
     option subnet-mask         255.255.255.0;
     filename                   "/pxelinux.0";
     default-lease-time         21600;
     max-lease-time             43200;
     next-server                $next_server;
}
...
--- >8 ---
</code>
===== DHCPD configuration =====

Ensure that dhcpd will only listen on the installation network : 

<code bash>
$ vi /etc/sysconfig/dhcpd
</code>

<code>
--- 8< --- /etc/sysconfig/dhcpd
DHCPDARGS=eth0
--- >8 ---
</code>
===== Cobbler =====
Run 

<code bash>
$ clobbler check
</code> 

and correct the items listed that exhibit configuration troubles. 

Modifications to cobbler main configuration file : 

<code bash>
$ vi /etc/cobbler/settings
</code>

<code>
--- 8< --- /etc/cobbler/settings
...
# default, localhost
server: 152.31.108.250
...
# default, localhost
next_server: 152.31.108.250
...
# default, don't manage
manage_dhcp: 1
...
--- >8 ---
</code>

Once you've finished, do not forget to run 

<code bash>
cobbler sync
</code>

====== Exploitation ======

cobbler design is layered : system configuration inherit profile configuration that inherit from distro configuration. You should keep that in mind when you work on it to design each layer that will fit your workflow. For example, distro layer should not have custom kickstart template, reserve the kickstart template to an upper layer.  

This section is somewhat Debian or RHEL centric for now.   

===== Distribution's importation =====

Mount the installation media of the targeted GNU/Linux distros as a loopback block device :

<code bash>
$ mkdir /mnt/loop0
$ mount -o loop /path/to/distro/iso /mnt/loop0
</code> 

==== RHEL ====


<code bash>
$ cobbler import --name=rhel5.7 --arch=i386 --path=/path/to/rhel/mountediso
$ cobbler import --name=rhel5.7 --arch=x86_64 --path=/path/to/rhel/mountediso
</code>

==== Debian ====
 

For Debian, import the debian-6.0.6-<arch>-CD-1.iso preferably or even an higher revision of the same major version if you do not have a network connection.  

<code bash>
$ cobbler import --name=debian6 --arch=i386 --path=/path/to/debian/mountediso
$ cobbler import --name=debian6 --arch=x86_64 --path=/path/to/debian/mountediso
</code>

Grab the netboot tarball : 

<code bash>
$ wget http://ftp.nl.debian.org/debian/dists/squeeze/main/installer-amd64/current/images/netboot/netboot.tar.gz -O netboot-am64.tar.gz
$ wget http://ftp.nl.debian.org/debian/dists/squeeze/main/installer-i386/current/images/netboot/netboot.tar.gz -O netboot-i386.tar.gz
</code>

Untar the netboot tarball to an appropriate location : 

<code bash>
$ mkdir -p /data/images/debian6-amd64
$ tar zxvf netboot-am64.tar.gz -C /data/images/debian6-amd64
$ mkdir -p /data/images/debian6-i386
$ tar zxvf netboot-i386.tar.gz -C /data/images/debian6-i386
</code>

Change the distro Debian cobbler layer kernel and initramfs to the netboot ones : 

<code bash>
$ cobbler distro edit --name=debian6-x86_64 --kernel=/data/images/debian6-amd64/debian-installer/amd64/linux --initrd=/data/images/debian6-amd64/debian-installer/amd64/initrd.gz
$ cobbler distro edit --name=debian6-i386 --kernel=/data/images/debian6-i386/debian-installer/i386/linux --initrd=/data/images/debian6-i386/debian-installer/i386/initrd.gz
</code>

You might encounter bugs with the Debian installer on squeeze (or not) : Debian kernel do not see disks for example. Try backported squeeze iso and netboot tarball here http://kmuto.jp/debian/d-i/

The initial import will create on very recent cobbler version some pre-configured repositories that you will need to synchronize. 

View newly created repositories : 

<code bash>
$ cobbler repo list
</code>

Adapt environment variables to fit proxy settings : 

<code bash>
$ cobbler repo edit --name=repo_name --environment="http_proxy=http://username:password@proxy-ec.eu.eurocopter.corp:8080/"
</code>
 

Synchronize the repository :

<code bash>
$ cobbler reposync --only=repo_name
</code>


If you have a network connection, have a look at : 

https://fedorahosted.org/cobbler/wiki/DebianDeployment
==== Ubuntu ====

FIXME
===== Third party repositories mirroring =====

To mirror EPEL repository for RHEL5, grab a mirror URL located nearby and:

<code bash>
$ cobbler repo add --mirror=http://mirror.affix.me/epel/5/i386/ --name=EPEL5-i386 --arch=i386 --environment="http_proxy=http://username:password@proxy-ec.eu.eurocopter.corp:8080/"
$ cobbler repo add --mirror=http://mirror.affix.me/epel/5/x86_64/ --name=EPEL5-x86_64 --arch=x86_64 --environment="http_proxy=http://username:password@proxy-ec.eu.eurocopter.corp:8080/"
</code>

Then run :

<code bash>
$ cobbler reposync --only=EPEL5-i386
$ cobbler reposync --only=EPEL5-x86_64
</code>
===== Profile creation =====

Create a profile reusing previous [[http://fedoraproject.org/wiki/Anaconda/Kickstart|kickstart]] template (NOTE: [[http://fedoraproject.org/wiki/Anaconda/Kickstart|kickstart]] raw file must be adapted to fit cobbler kickstart template engine : [[http://cheetahtemplate.org/learn.html|Cheetah]]).

<code bash>
$ cobbler profile add --name=rhel5.7-i386-ks --distro=rhel5.7-i386 --kickstart=/data/KS/redhat/5/rhel-common.ks --repos="repo_name_01 repo_name_02"
$ cobbler profile add --name=rhel5.7-x86_64-ks --distro=rhel5.7-x86_64 --kickstart=/data/KS/redhat/5/rhel-common.ks --repos="repo_name_01 repo_name_02"
</code>

The same goes for debian and its [[http://wiki.debian.org/DebianInstaller/Preseed|preseed]] system : 

First rename the Debian x86_64 profile in case you want to use it directly, Debian installer do not like underscore : 

<code bash>
$ cobbler profile rename --name=debian6-x86_64 --newname=debian6-amd64
</code>

<code bash>
$ cobbler profile add --name=debian6-i386-ec --distro=debian6-i386 --kickstart=/data/KS/debian/6/debian-common.seed 
$ cobbler profile add --name=debian6-amd64-ec --distro=debian6-x86_64 --kickstart=/data/KS/debian/6/debian-common.seed
</code>


All kickstart and preseed files are in /data/KS.
===== System creation =====

If you want to install two boxes with two different MAC addresses and two different hostnames for two different processor types, first create a system that will inherit configuration from a profile:  

<code bash>
$ cobbler system add --name=rhelwsec-i386 --profile=rhel5.7-i386-ks --hostname=computer_name --mac=AA:BB:CC:DD:EE:FF
$ cobbler system add --name=rhelwsec-x86_64 --profile=rhel5.7-x86_64-ks --hostname=computer_name --mac=GG:HH:II:JJ:KK
</code>


===== Troubleshooting =====

  -  Make sure the local switch is powered and the install network cable is wired
  - Run 
<code bash>
cobbler check 
</code>
and 
<code bash>
cobbler sync
</code>