I'm currently installing Plesk inside OpenVZ.  I have run into various problems with the way the wiki on OpenVZ.org explains setting it up, and how I'm actually ending up setting it up.  This page documents all my settings, and will likely point to other pages with errors that were encountered using the settings described on the wiki at openvz.org.

The hardware node (HN) in this case is Centos 5.2 (Final), and the Virtual Environment in this case is Fedora 8 (Werewolf).

I was attempting to follow example table C on this page.
http://wiki.openvz.org/UBC_configuration_examples_table

Here are the commands issued on container ID <veid> to set things as advised in the table above.

vzctl set <veid> --ipadd #.#.#.# --save vzctl set <veid> --nameserver #.#.#.# --save vzctl set <veid> --save --numproc 400 vzctl set <veid> --save --numtcpsock 500 vzctl set <veid> --save --numothersock 500 vzctl set <veid> --save --vmguarpages 102400 vzctl set <veid> --save --kmemsize 16384000:18022400 vzctl set <veid> --save --tcpsndbuf 536570:10485760 vzctl set <veid> --save --tcprcvbuf 5365760:10485760 vzctl set <veid> --save --othersockbuf 1503232:4063232 vzctl set <veid> --save --dgramrcvbuf 262144 vzctl set <veid> --save --oomguarpages 102400 vzctl set <veid> --save --lockedpages 4096 vzctl set <veid> --save --shmpages 131072 vzctl set <veid> --save --privvmpages 262144:292912 vzctl set <veid> --save --numfile 8192 vzctl set <veid> --save --numflock 200:220 vzctl set <veid> --save --numpty 64 vzctl set <veid> --save --numsiginfo 512 vzctl set <veid> --save --dcachesize 4194304:4317184

To avoid the following issue.
DNS not resolving in openVZ container (VE)
Add the following lines to

 /etc/sysconfig/iptables (on HN)

-A RH-Firewall-1-INPUT -d #.#.#.# -j ACCEPT -A RH-Firewall-1-INPUT -s #.#.#.# -j ACCEPT

# service iptables restart

To avoid the following issue within your container.
date: cannot set date: Operation not permitted (OpenVZ)
Issue the following command on the Hardware Node (HN)

# vzctl set <veid> --save --capability sys_time:on

In order to avoid the following issue.
OpenVZ free memory in container not correct
Issue the following commands on the Hardware Node (HN), IF you wish to allocate 256MB total memory for your VE.

vzctl set <veid> --save --privvmpages 65536:73228 vzctl set <veid> --save --vmguarpages 65536 vzctl set <veid> --save --oomguarpages 65536 vzctl set <veid> --save --shmpages 32768

These fixes were required in order to make the install of Plesk work.  I actually had to go back and reinstall Plesk after encountering these errors.

Sadly, in order to prevent the following issue.
Plesk inside OpenVZ memory allocation issues
I needed to increase RAM to 512MB for the VE.

vzctl set <veid> --save --privvmpages 131072:146456 vzctl set <veid> --save --vmguarpages 131072 vzctl set <veid> --save --oomguarpages 131072 vzctl set <veid> --save --shmpages 65536

At this point, I'm ready to install Plesk on the VE.  Install command is.

# ./parallels_installer_v3.4.1_build090120.13_os_FedoraCore_8_i386

Install options are.

Plesk Control Panel Parallels Plesk Panel 9.0.1 3 - Custom Add PHP 5 Support Postfix (not Qmail mailserver)

I seem to recall problems beyond this on my first install.  However, I must have corrected them by increasing the memory to 512MB.  Go figure.