How To Install Gentoo Onto Any OpenVZ VPS

create-test-container.script

# vzctl create 200 --config unlimited --ostemplate \
>    debian-6.0-x86 --ipadd 192.168.202.200 --hostname guest
Creating container private area (debian-6.0-x86)
Performing postcreate actions
CT configuration saved to /etc/vz/conf/200.conf
Container private area was created
# vzctl start 200
Starting container...
Container is mounted
Adding IP address(es): 192.168.202.200
Setting CPU units: 1000
Container start in progress...
# vzctl set 200 --userpasswd root:root
# vzctl set 200 --nameserver 8.8.8.8

debian-to-gentoo.sh

#!/bin/sh

set -e

if [ `whoami` != "root" ]; then
  echo "This script must run as root!"
  exit 1
fi

if [ ! -f /root/stage3-*.tar.bz2 ]; then
  echo "Could not find stage3 tarball!"
  exit 1
fi

echo "Extracting stage3 tarball ..."
rm -fr /root/gentoo
mkdir /root/gentoo
tar xjpf /root/stage3-*.tar.bz2 -C /root/gentoo

echo "Patching Gentoo installation ..."

# Fix mtab.
rm -f /root/gentoo/etc/mtab
ln -s /proc/mounts /root/gentoo/etc/mtab

# The host, not the container, mounts file systems.
echo "proc  /proc       proc    defaults    0    0" > /root/gentoo/etc/fstab
echo "none  /dev/pts    devpts  rw          0    0" >> /root/gentoo/etc/fstab

# The container has no terminals, don't run agetty.
sed -i -e '/agetty/d' /root/gentoo/etc/inittab

# Force a password to be set.
sed -i -e '/^root/s/\*/!/' /root/gentoo/etc/shadow

# Tell RC that we're running inside OpenVZ.
sed -i -e 's/#?rc_sys=.*/rc_sys="openvz"/' /root/gentoo/etc/rc.conf

# Update PAM so that the host can set passwords.
sed -i -e \
    '/^password/s/include.*/required pam_unix.so md5 shadow/' \
    /root/gentoo/etc/pam.d/chpasswd

# Add the network to the default run level.
ln -s net.lo /root/gentoo/etc/init.d/net.venet0
ln -s /etc/init.d/net.venet0 /root/gentoo/etc/runlevels/default/net.venet0
# Start SSH at boot.
ln -s /etc/init.d/sshd /root/gentoo/etc/runlevels/default/sshd

echo "Activating Gentoo ..."
mount | grep -q /root/new && umount /root/new
rm -fr /root/new
mkdir /root/new
mount --bind / /root/new

rsync -aH --delete-after \
    --exclude=/dev \
    --exclude=/lib/init \
    --exclude=/root \
    /root/gentoo/ /root/new/

echo "Setting root password ..."
passwd