I've tried OpenVZ for Debian 7 (Wheezy) in a 32-bit hardware node:
$ echo "deb http://download.openvz.org/debian wheezy main" > /etc/apt/sources.list.d/openvz-wheezy.list
$ wget -qO - http://ftp.openvz.org/debian/archive.key | sudo apt-key add -
$ apt-get update
# (package ploop not available)
$ apt-get install vzkernel vzdump
$ ln -s /var/lib/vz/ /vz
# Customize /etc/sysctl.d/10-openvz.conf
$ reboot
And boot process gives me some errors:
libkmod: ERROR ../libkmod/libkmod.c:505 kmod_lookup_alias_from_builtin_file: could not open builtin file '/lib/modules/2.6.32-042stab059.7/modules.builtin.bin'
FATAL: Module loop not found.
If I perform:
$ update-initramfs -u
update-initramfs: Generating /boot/initrd.img-2.6.32-042stab059.7
WARNING: could not open /var/tmp/mkinitramfs_jsyLA7/lib/modules/2.6.32-042stab059.7/modules.builtin: No such file or directory
I don't know if this message can be ignored and use this in a production environment. Kernel version and vzctl version (3.0.30.2) suggest that the packages provided are obsolete.