FAQ
Contents
General
What is a container (Virtual Environment, Virtual Private Server, VPS, VE)?
- See Container.
Who needs OpenVZ? How it can be used?
- See Use cases.
How is OpenVZ different from other technologies?
How is OpenVZ updated and why it is secure?
- See Security.
I want to show my appreciation to OpenVZ and put some logo to my site. Where to get it?
- See Artwork.
Installation and upgrade
What hardware is supported by OpenVZ kernel?
- See Virtuozzo HCL.
Why there are different kernel flavours available and what do they mean?
How do I rebuild the kernel?
- See Kernel build.
What does 021stab018 in OpenVZ kernel version mean?
- See Kernel versioning.
How can I check package signatures?
- See Package signatures.
Is it possible to run x86 container on a x86_64 arch?
- Sure :) We actually did some work on that to enable migration of x86 container from x86 to x86_64 and back, and to enable using 32-bit iptables in 32bit container on an x86_64 system.
What filesystems should I choose for saving my containers?
- The safest choice is ext2/3 to save your containers. Remember that ReiserFS is less stable than ext2/3.
- If you choose to use XFS, there will be no support for disk quota inside
containers.
Networking
How do I set up VPN for a container?
What is veth and how do I use it?
Why doesn't net-snmpd work on my containers?
- See SNMPD in container.
User Beancounters
What are those User Beancounters?
See UBC.
What units are UBC parameters measured in?
See UBC parameter units.
How do I set up a container which is able to get X Mb of RAM?
I can not start a program in container: it reports out of memory. What do I do?
See Resource_shortage.
How can I reset failcnt in /proc/user_beancounters?
See UBC failcnt reset.
Troubleshooting
My kernel crashed. What should I do?
I see a lot of processes in D state. What does that mean?
- See Processes in D state.