Difference between revisions of "FAQ"
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== General == | == General == | ||
| − | + | ===== What is a Virtual Environment (Virtual Private Server, VPS, VE)? ===== | |
See [[VE]] | See [[VE]] | ||
| − | + | ===== Who needs OpenVZ? How it can be used? ===== | |
| − | + | See [[Use cases]] | |
| − | + | ===== How is OpenVZ different from other technologies? ===== | |
| − | + | See [[Introduction to virtualization]] | |
| − | + | ===== 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 == | == Installation and upgrade == | ||
| − | |||
| − | |||
| − | + | ===== What hardware is supported by OpenVZ kernel? ===== | |
| − | + | See [http://www.virtuozzo.com/en/products/virtuozzo/hcl/ Virtuozzo HCL]. | |
| − | + | ===== Why there are different kernel flavours available and what do they mean? ===== | |
| − | + | See [[Different kernel flavors (UP, SMP, ENTERPRISE, ENTNOSPLIT)]] | |
| − | + | ===== 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 VPS on a x86_64 arch? ===== | ||
| + | Sure :) We actually did some work on that to enable migration of x86 VE from x86 to x86_64 and back, and to enable using 32-bit iptables in 32bit VE on an x86_64 system. | ||
== Networking == | == Networking == | ||
| − | |||
| − | |||
| − | + | ===== How do I set up VPN for a VE? ===== | |
| − | + | See [[VPN via the TUN/TAP device]] | |
| + | |||
| + | ===== What is veth and how do I use it? ===== | ||
| + | See [[Virtual Ethernet device]] | ||
== User Beancounters == | == User Beancounters == | ||
| − | + | ===== How can I reset <code>failcnt</code> in <code>/proc/user_beancounters</code>? ===== | |
| − | + | In short — only by stopping and starting a VE. In some cases you need to keep VE in a stopped state for a few minutes. | |
| − | + | Long answer: there can be many application who reads /proc/user_beancounters, and thus if you will reset it you gonna have problems with those other apps. | |
| − | + | Consider what happens if you will reset you sent/received packets/bytes statistics on the network interface — programs which reads will be screwed up. | |
| − | + | So the proper thing to watch for is not the current value of, say, failcnt, but whether it is increased (from the previous reading) or not. You can write a simple shell script to do just that. | |
== Troubleshooting == | == Troubleshooting == | ||
| − | + | ===== My kernel crashed. What should I do? ===== | |
| − | + | See [[When you have an oops]] | |
| − | + | ===== I see a lot of processes in D state. What does that mean? ===== | |
: See [[Processes in D state]] | : See [[Processes in D state]] | ||
Revision as of 07:13, 13 July 2006
Contents
- 1 General
- 1.1 What is a Virtual Environment (Virtual Private Server, VPS, VE)?
- 1.2 Who needs OpenVZ? How it can be used?
- 1.3 How is OpenVZ different from other technologies?
- 1.4 How is OpenVZ updated and why it is secure?
- 1.5 I want to show my appreciation to OpenVZ and put some logo to my site. Where to get it?
- 2 Installation and upgrade
- 2.1 What hardware is supported by OpenVZ kernel?
- 2.2 Why there are different kernel flavours available and what do they mean?
- 2.3 How do I rebuild the kernel?
- 2.4 What does 021stab018 in OpenVZ kernel version mean?
- 2.5 How can I check package signatures?
- 2.6 Is it possible to run x86 VPS on a x86_64 arch?
- 3 Networking
- 4 User Beancounters
- 5 Troubleshooting
General
What is a Virtual Environment (Virtual Private Server, VPS, VE)?
See VE
Who needs OpenVZ? How it can be used?
See Use cases
How is OpenVZ different from other technologies?
See Introduction to virtualization
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?
See Different kernel flavors (UP, SMP, ENTERPRISE, ENTNOSPLIT)
How do I rebuild the kernel?
See Kernel build
What does 021stab018 in OpenVZ kernel version mean?
How can I check package signatures?
Is it possible to run x86 VPS on a x86_64 arch?
Sure :) We actually did some work on that to enable migration of x86 VE from x86 to x86_64 and back, and to enable using 32-bit iptables in 32bit VE on an x86_64 system.
Networking
How do I set up VPN for a VE?
See VPN via the TUN/TAP device
What is veth and how do I use it?
User Beancounters
How can I reset failcnt in /proc/user_beancounters?
In short — only by stopping and starting a VE. In some cases you need to keep VE in a stopped state for a few minutes.
Long answer: there can be many application who reads /proc/user_beancounters, and thus if you will reset it you gonna have problems with those other apps. Consider what happens if you will reset you sent/received packets/bytes statistics on the network interface — programs which reads will be screwed up. So the proper thing to watch for is not the current value of, say, failcnt, but whether it is increased (from the previous reading) or not. You can write a simple shell script to do just that.
