Ubuntu Precise template creation

• Based on Ubuntu_Trusty_template_creation.
• HN: Debian 7 (Wheezy).
• Templates: Ubuntu 12.04 (Precise Pangolin) and 14.04 (Trusty Tahr).

Setup variables

Common part:

ARCH="i386" 
export COUNTRY="de" 

For 12.04 (Precise Pangolin):

export DIST="precise" 
export NAME="ubuntu1204" 
TMPL="12.04-x86"

For 14.04 (Trusty Tahr):

export DIST="trusty" 
export NAME="ubuntu1404"
TMPL="14.04-x86"

Note: replace "i386" and "x86" to "amd64", if you want to get 64-bit environment.

Prepare directory

apt-get -y install debootstrap
cd /usr/share/debootstrap/scripts && ln -s gutsy trusty && cd -
debootstrap --arch $ARCH $DIST /var/lib/vz/template/$NAME-$ARCH http://$COUNTRY.archive.ubuntu.com/ubuntu
chroot /var/lib/vz/template/$NAME-$ARCH

Note: Debootstrap can miss Trusty profile (as in Debian Wheezy), so you should create it manually as seen above.

Steps in chroot

Configure locales:

locale-gen ru_RU.UTF-8
locale-gen en_US.UTF-8
echo 'LANG="en_US.UTF-8"' > /etc/default/locale

Configure packages:

echo " 
deb http://$COUNTRY.archive.ubuntu.com/ubuntu $DIST           main restricted universe multiverse
deb http://$COUNTRY.archive.ubuntu.com/ubuntu $DIST-updates   main restricted universe multiverse
deb http://$COUNTRY.archive.ubuntu.com/ubuntu $DIST-security  main restricted universe multiverse
#eb http://$COUNTRY.archive.ubuntu.com/ubuntu $DIST-backports main restricted universe multiverse
" > /etc/apt/sources.list
  :
dpkg --remove ubuntu-minimal isc-dhcp-client isc-dhcp-common ntpdate resolvconf
dpkg --purge  ubuntu-minimal isc-dhcp-client isc-dhcp-common ntpdate resolvconf
  :
apt-get update
apt-get -y dist-upgrade

Configure mail system (consider 192.0.2.2 is IP of venet0 on HN, or put here your own SMTP relay if needed):

mkdir /etc/dma
echo $NAME > /etc/mailname
echo '
# dma-0.0.2010.xx syntax
SMARTHOST 192.0.2.2
DBOUNCEPROG dbounce-simple-safecat
MAILNAMEFILE /etc/mailname
' > /etc/dma/dma.conf
  :
DEBIAN_FRONTEND=noninteractive apt-get -y install --no-install-recommends dma bsd-mailx safecat

14.04 note: config syntax for dma-0.9 was changed:

echo '
# dma-0.9 syntax
SMARTHOST 192.0.2.2
MAILNAME /etc/mailname
' > /etc/dma/dma.conf

Disable hardware-related configs:

Disable() {
   local f="/etc/init/$1.conf"
   local o="/etc/init/$1.override"
   test -s "$o" && grep -qw "^manual" "$o" && return
   echo "manual  # DISABLE UNDER OPENVZ" >> "$o"
}
Disable console
Disable console-font
Disable console-setup
  :
Disable ondemand
Disable setvtrgb
  :
Disable hwclock
Disable hwclock-save
  :
Disable ureadahead
Disable ureadahead-other
  :
Disable plymouth
Disable plymouth-log
Disable plymouth-ready
Disable plymouth-shutdown
Disable plymouth-splash
Disable plymouth-stop
Disable plymouth-upstart-bridge
  :
Disable tty2
Disable tty3
Disable tty4
Disable tty5
Disable tty6
  :
Disable udev
Disable udev-fallback-graphics
Disable udev-finish
Disable udevmonitor
Disable udevtrigger
  :
sed -i.orig -e '/| sysctl / s,$, || :,'                     /etc/init/procps.conf
sed -i.orig -e 's,^\$ModLoad imklog,## \$ModLoad imklog,g'  /etc/rsyslog.conf

Cleanup and leave chroot:

apt-get clean
find /var/cache/apt /var/lib/apt/lists -type f -delete
exit

Create template archive

rm -f   /var/lib/vz/template/cache/ubuntu-$TMPL.tar.gz &&
tar czf /var/lib/vz/template/cache/ubuntu-$TMPL.tar.gz --numeric-owner -C /var/lib/vz/template/$NAME-$ARCH .

How to create CT from template

ID=123
vzctl create $ID --ostemplate ubuntu-$TMPL --hostname … --name … --layout simfs
vzctl set $ID --save --onboot yes --nameserver 192.0.2.2 --ipadd 192.0.2.$ID

First steps after creation

Start and enter:

vzctl start $ID
vzctl enter $ID

Install updates:

apt-get update
apt-get -y dist-upgrade