Difference between revisions of "Cobbler"

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(How to force NICs to be named ethX instead emX, pXpY or any other weird name)
(How to add Ubuntu releases to Cobbler)
 
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* Copy the CD in order to create a repository
 
* Copy the CD in order to create a repository
 
  # mkdir -p /var/www/cobbler/ks_mirror/ubuntu-server-LTS-10_04-x86_64
 
  # mkdir -p /var/www/cobbler/ks_mirror/ubuntu-server-LTS-10_04-x86_64
  # rsync -avuz /opt/buffalo/distro/UBUNTU/* /var/www/cobbler/ks_mirror/ubuntu-server-LTS-10_04-x86_64/
+
  # rsync -avz /mnt/distro/UBUNTU/* /var/www/cobbler/ks_mirror/ubuntu-server-LTS-10_04-x86_64/
  
 
* Add the distro
 
* Add the distro

Latest revision as of 22:44, 4 August 2015

Setup

How to install Cobbler on CentOS

  • Install cobbler and its dependencies
# yum -y install cobbler cobbler-web pykickstar
  • Enable Cobbler and the dependent services
# chkconfig httpd on
# chkconfig xinetd on
# chkconfig cobblerd on
  • Start Cobbler and the dependent services
# service httpd start
# service xinetd start
# service cobblerd start

How to install Cobbler on Ubuntu

  • Install cobbler and its dependencies
# apt-get -y install cobbler cobbler-web python-ldap genisoimage bind9 isc-dhcp-server xinetd
  • Setup the tftp service on /etc/xinetd.d/tftp
service tftp
{
       disable                 = no
       socket_type             = dgram
       protocol                = udp
       wait                    = yes
       user                    = root
       server                  = /usr/sbin/in.tftpd
       server_args             = -B 1380 -v -s /var/lib/tftpboot
       per_source              = 11
       cps                     = 100 2
       flags                   = IPv4
}
  • Remove IPv6 from /etc/default/tftpd-hpa
TFTP_ADDRESS="0.0.0.0:69"
  • Enable Cobbler and its dependencies
# update-rc.d xinetd defaults
# update-rc.d apache2 defaults
# update-rc.d cobbler defaults
  • Enable Apache's rewrite module
# a2enmod rewrite
  • Start Cobbler and its dependent services
# service xinetd start
# service apache2 start
# service cobbler start

How to setup user accounts to access Cobbler

Cobbler uses Apache's htdigest, so in order to create an account for the user cobbler do:

htdigest /etc/cobbler/users.digest "Cobbler" cobbler

Systems

How to force NICs to be named ethX instead emX, pXpY or any other weird name

  • Edit the distro settings and add to the append field
biosdevname=0

How to add systems to Cobbler

# cobbler system add --name=desktop-xfce-1 \
                  --profile=Fedora17-xfce \
                  --mac=52:54:00:b8:5e:8f \
                  --ip-address=10.20.30.40

Distros

How to create a bootable iso

  • With a particular set of profiles
# cobbler buildiso --profiles="profile1 profile2 ..."
  • With a particular distro
# cobbler buildiso --standalone --distro="distro1" --profiles="profile1 profile2"

How to add multiple discs from CentOS

  • Create the proper directories and mount the discs
# export DISTRO=CentOS-6.2-x86_64
# export KS_MIRROR=/var/www/cobbler/ks_mirror
# mkdir -p /mnt/el{1,2}
# mount -o loop $DISTRO-bin-DVD1.iso /mnt/el1
# mount -o loop $DISTRO-bin-DVD2.iso /mnt/el2
  • Import the first disc with cobbler
# cobbler import --name=$DISTRO --path=/mnt/el1
  • Import the second disc with rsync
# rsync -a /mnt/el2/ $KS_MIRROR/$DISTRO --exclude-from=/etc/cobbler/rsync.exclude --progress
  • Update repository
# createrepo -c cache -s sha --update --groupfile $(ls $KS_MIRROR/$DISTRO/repodata/*comps.xml) $KS_MIRROR/$DISTRO

How to add a DOS based distro to cobbler

  • Place original imagess on ks_mirror
# mkdir -p /var/www/cobbler/ks_mirror/seagate
# cp SeaTools.ima /var/www/cobbler/ks_mirror/seagate/
# cp /var/lib/tftpboot/memdisk /var/www/cobbler/ks_mirror/seagate/
  • Create distro
# cobbler distro add --breed=other --name=seagate --os-version=msdos --initrd=/var/www/cobbler/ks_mirror/seagate/SeaTools.ima --kernel=/var/www/cobbler/ks_mirror/seagate/memdisk
  • Create profile, this could be done in cobbler web

How to add Ubuntu releases to Cobbler

  • Import the distro into cobbler if is already recognized on cobbler
# cobbler import --path=/var/www/cobbler/ks_mirror/ubuntu-server-LTS-10_04-x86_64/ --breed=ubuntu --name=ubuntu-server-LTS-10_04 --os-version=lucid --arch=x86_64 --kickstart=/var/lib/cobbler/kickstarts/ubuntu-server-10.seed
  • Add the proper distro name to code.py
vi /usr/lib/python2.7/site-packages/cobbler/codes.py
rm -f /usr/lib/python2.7/site-packages/cobbler/codes.pyc
rm -f /usr/lib/python2.7/site-packages/cobbler/codes.pyo
  • Copy the CD in order to create a repository
# mkdir -p /var/www/cobbler/ks_mirror/ubuntu-server-LTS-10_04-x86_64
# rsync -avz /mnt/distro/UBUNTU/* /var/www/cobbler/ks_mirror/ubuntu-server-LTS-10_04-x86_64/
  • Add the distro
# cobbler distro add --breed=ubuntu --name=ubuntu-server-LTS-10_04 --os-version=lucid --arch=x86_64 --initrd=/var/www/cobbler/ks_mirror/ubuntu-server-LTS-10_04-x86_64/install/netboot/ubuntu-installer/amd64/initrd.gz --kernel=/var/www/cobbler/ks_mirror/ubuntu-server-LTS-10_04-x86_64/install/netboot/ubuntu-installer/amd64/linux

How to validate a Ubuntu/Debian preseed file

# debconf-set-selections -c preseed.cfg

How to ad a newer non-listed Ubuntu release

Assuming we want to add oneiric

  • Add oneiric to ubuntu array in the file /usr/lib/python2.7/site-packages/cobbler/
  • Remove .pyc .pyo files
  • Mount ubuntu server oneiric dvd
# mkdir -p /mnt/dvd
# mount /dev/cdrom /mnt/dvd
# cobbler import --name=ubuntu-server-11_10 --path=/mnt/dvd
# cobbler distro add --arch=x86_64 --breed=ubuntu --name=ubuntu-server-11_10 --os-version=oneiric --initrd=/var/www/cobbler/ks_mirror/ubuntu-server-11_10/install/netboot/ubuntu-installer/i386/initrd.gz --kernel=/var/www/cobbler/ks_mirror/ubuntu-server-11_10/install/netboot/ubuntu-installer/i386/linux
  • Restart server
# service cobblerd restart
# cobbler sync

Koan

Client side helper for Cobbler

How to list the available profiles

koan --server=cobbler.bashlinux.com --list-profiles

How to reprovision a server from the client side

koan --replace-self --server=cobbler.bashlinux.com --profile=BLNX_DB

Troubleshooting

How to fix dpkg if cobbler fail to installs on Ubuntu

On Ubuntu, if the interface mask is set to 00000000 in all devices then the configuration might fail.

To fix it, do:

  • Get the destination of the main Iface from /proc/net/route
  • Change $Mask with $Destination in /var/lib/dpkg/info/cobbler.config and put the mask you got from the previous step
  • Reconfigure the cobbler and cobbler-web
# dpkg --configure cobbler
# dpkg --configure cobbler-web

How to fix CX: 'serializer: error loading collection profile. Check /etc/cobbler/modules.conf

Check for empty files under /var/lib/cobbler/config/profiles.d