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1,387 bytes added, 10:18, 9 January 2021
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{{Virtuozzo}}
 
== General ==
===== What is a Virtual Environment (Virtual Private Server, VPS, VE)? =====
:See [[VE]]
===== Who needs OpenVZSo what is Virtuozzo? How =====Virtuozzo is a Linux based virtualization platform, combining container and hypervisor virtualization, into a single product. While primarily built for service providers to run cloud services and applications, it can be is usedby variety of businesses, including MSP, SMB and Enterprises. ===== What is OpenVZ and how it compares to Virtuozzo? =====:See [[Use cases]]OpenVZ is a free and opensource portion of Virtuozzo. It includes core of Virtuozzo functionality, like kernel and command line management tools for creating and managing containers. Virtuozzo includes everything that OpenVZ does, plus additional features and services available with the commercial version only.  ===== How does Virtuozzo 7/OpenVZ pair compares to its predecessor (Virtuozzo versions 4.x and 6/OpenVZ) =====Previously, OpenVZ and Virtuozzo were built out of the same code base with some unique patches applied. That warranted the user interfaces to be similar but not identical. With Virtuozzo 7, the compatibility will be on the binary level - effectively the open source components will be the same between OpenVZ and Virtuozzo.
===== How is OpenVZ different users will benefit from other technologiesit? =====:See [[Introduction to virtualization]]OpenVZ components will be undergoing the same testing procedures as the commercial product. Also, some new features previously available on Virtuozzo only (notably hypervisor) will become available on the product built for OpenVZ community users.
===== How is OpenVZ updated and why it is secureWhat support options are available for Virtuozzo 7? =====For the moment, only preview (beta) versions of Virtuozzo 7 are available. They are intended for development and testing only, not for production. Virtuozzo 7 is not yet commercially supported. For supported commercial version, please refer to [http:See [[Security]//www.odin.com/products/virtuozzo/ Virtuozzo 6].
===== Why I want to show my appreciation to need Virtuozzo/OpenVZ and put some logo to my site. Where to get itwhen LXC exist? =====:See our [[Artworkcomparison]]of different virtualization solutions.
== Installation and upgrade === When OpenVZ will be in upstream kernel? =====Our kernel developers [http://openvz.org/File:Kernel_patches_stats.png work hard] to merge containers functionality into the upstream Linux kernel, making OpenVZ team the biggest contributor to Linux Containers (LXC) kernel, with features such as PID and network namespaces, memory controller, checkpoint-restore and much more.
===== 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 I want to show my appreciation to OpenVZ and what do they meanput some logo to my site. Where to get it? =====:See [[Different kernel flavors (UP, SMP, ENTERPRISE, ENTNOSPLIT)Artwork]].
===== How do I rebuild the kernelWhat kind of documentation is available? =====:See [[Kernel build]]
===== What does 021stab018 in OpenVZ kernel version mean? =====:See Aside from this wiki, which contains lots of information, you can check extensive [[Kernel versioningMan|manual pages]]and [http://docs.openvz.org Virtuozzo documentation].
===== Who needs OpenVZ? How it can I check package signaturesbe used? =====:See [[Package signaturesUse cases]].
===== Is it possible to run x86 VPS on a x86_64 archHow scalable is OpenVZ? =====: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 ==OpenVZ technology scales as well as standard Linux kernel — up to thousands of CPUs and terabytes of RAM. Read more about [[WP/Containers_density|OpenVZ containers density]] and [[performance]].
==Installation and upgrade === How do I set up VPN for a VE? =====:See [[VPN via the TUN/TAP device]]
===== What is veth and how do I use itHow to install OpenVZ? =====:See [[Virtual Ethernet device]]
== User Beancounters ==There are two versions of OpenVZ available:
===== How can I reset <code>failcnt</code> in <code>/proc/user_beancounters</code>? =====* [[Roadmap|stable version]]:In short — only by stopping OpenVZ legacy (based on RHEL5 and starting a VERHEL6 kernels). In some cases you need to keep VE in a stopped state for a few minutes* [[Roadmap|development version]]: [[Virtuozzo]] Linux distribution based on RHEL7 kernel.
: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.See [[Quick installation]]
== Troubleshooting ======= My What hardware is supported by OpenVZ kernel crashed. What should I do? =====:See [[When you have an oops]https://hardware.redhat.com/ RHEL Hardware Compatibility List].
===== I see a lot of processes in D state. What does that meanHow existing OpenVZ users can upgrade to the [[Virtuozzo|new version]]? =====:See While there is no in-place upgrade, we prepared [[Processes in D stateUpgrade_script_from_OpenVZ_to_Virtuozzo_7|upgrade script]]for OpenVZ users to move their containers to the new platform. The script allows to transfer containers from old to new OpenVZ version (or from OpenVZ to Virtuozzo).
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