Server Fault Stack Exchange
Server Fault Stack Exchange

Questions tagged [openvz]

OpenVZ is an open source containerisation technology for Linux which utilities containers to run separate Linux based operating systems on a single machine. OpenVZ is typically used as it touts a low overhead, of around 1-3% of CPU, compared to virtualization technologies.

OpenVZ is an open source operating system-level containerisation which integrates with the Linux Kernel. Because of this OpenVZ can only run on Linux and can only run Linux containers which have compatible kernels. OpenVZ separates out virtual environments into "containers", which are similar to BSD Jails.

OpenVZ is not like traditional hyper-visor based virtualization technologies, such as Xen or VMware, in that is only runs a single patched Linux Kernel. This however lets OpenVZ be faster and more efficient than hyper-visor based technologies. Typically each OpenVZ container will have around 1-3% overhead of that if it were a physical machine.

OpenVZ is the basis of Virtuozzo Containers, which is commercial software distributed by Parallels Inc. OpenVZ is available under the GNU GPL v2 license.

422 questions
5
votes
1 answer

dircolors: no SHELL environment variable, and no shell type option given

On interactive login I get: dircolors: no SHELL environment variable, and no shell type option given But I do have SHELL variable set: % set | grep…
LetMeSOThat4U
  • 1,159
  • 2
  • 14
  • 29
5
votes
3 answers

NFS server not serving share after reboot

I have two Linode containers. Box A is our general purpose web server. It occasionally needs to access Box B, which is set up as an NFS server. When Box B reboots, Box A is unable to access any NFS shares no matter what I do. After several hours of…
samh
  • 213
  • 4
  • 11
5
votes
1 answer

"kernel: Cannot read proc file system: 1 - Operation not permitted" -- millions of such messages each minute in kern.log on OpenVZ VPS?

I'm seeing repeated never ending such messages in kern.log on my OpenVZ ubuntu 12.04 server. Mar 2 06:23:33 localhost kernel: Cannot read proc file system: 1 - Operation not permitted. Mar 2 06:24:04 localhost kernel: last message repeated 5082222…
Rajat Gupta
  • 301
  • 4
  • 17
5
votes
1 answer

Why is Linux choosing the wrong source ip address

and what to do to let it choose the right one? This all happens inside an OpenVZ container: The Host is Debian/Wheezy with Redhat/OpenVZ Kernel: root@mycl2:~# uname -a Linux mycl2 2.6.32-openvz-042stab081.5-amd64 #1 SMP Mon Sep 30 16:40:27 MSK 2013…
Scheintod
  • 361
  • 1
  • 4
  • 15
5
votes
1 answer

Enabling IPv6 with OpenVZ using Proxmox 2.2

I'm trying to enable IPv6 on my Debian nodes (OpenVZ) using venet; my host is under Proxmox 2.2 (kernel 2.6.32-16-pve), and it seems the routing fails. My host correctly pings all my nodes; all my nodes ping my host, but none of the nodes can ping…
tmuguet
  • 151
  • 3
5
votes
3 answers

Nagios (Return code of 141 is out of bounds) on random services

We have had Nagios running on one of our servers with out any problems for a while but lately we get (Return code of 141 is out of bounds). The load on the server raised because we gone online with our service, but its still not really high (load…
PortKnox.net
  • 51
  • 1
  • 3
5
votes
3 answers

How to mount glusterfs inside a OpenVZ container?

glusterfs uses fuse to mount a glusterfsd volume, wich works fine on any hardwarenode without virtualization. But, I now try to mount the device inside a container glusterfs --debug -f /etc/glusterfs/glusterfs.vol /storage and get the following…
Marcus Spiegel
5
votes
4 answers

OpenVZ multiple networks on CTs

I have Hardware Node (HN) which has 2 physical interfaces (eth0, eth1). I'm playing with OpenVZ and want to let my containers (CTs) have access to both of those interfaces. I'm using basic configuration - venet. CTs are fine to access eth0 (public…
user6733
  • 171
  • 1
  • 3
5
votes
2 answers

OpenVZ: limit number of cpu cores per VE

Is there a way of limiting number of cpu cores seen from inside a VE? I have an eight core server, but I want my VE to see only one particular core. Thanx!
TiFFolk
  • 1,077
  • 3
  • 14
  • 25
4
votes
1 answer

Why KVM VPS is slower then OPENVZ

so i just purchased one KVM vps and when i bench it and compare it with my existing openvz vps i found it that its slower that openvz vps and when i checked processor info its bit wrong info so am wondering can the company control to share the cpu…
user889030
  • 181
  • 1
  • 8
4
votes
1 answer

What's the expected behaviour of multiple hostname entries with different IP addresses in /etc/hosts?

I know this has been discussed in several places, but there doesn't seem to be a definitive answer yet - at least not for RHEL 6. I'm just hoping someone might be able to point to how it's working so I can dig a little. Short Version: I have an…
dsl101
  • 433
  • 1
  • 7
  • 13
4
votes
1 answer

Software Interrupts CPU time is high and keeps growing

My system is a Debian 6.0.3 x86_64 box w/kernel 2.6.32-5-openvz-amd64, it hosts a number of OpenVZ containers. I have recently migrated from LXC/newer kernel from backports repo to the stable OpenVZ kernel to resolve network issues but got another…
Alex
  • 7,789
  • 4
  • 36
  • 51
4
votes
2 answers

How to properly set CPU Units for OpenVz VEs

According to all the sources I read (openvz wiki, various mailinglists, forums, ..) the values of the cpuunits settings are relative to each other. So when all are equal and the system is busy, all receive the same cpu share. But something still…
gucki
  • 788
  • 2
  • 10
  • 28
4
votes
2 answers

Advice on most fitting choice of virtualization platform: Xen | OpenVZ | KVM | other? What suits the purpose best?

I am aware of the multitude of virtualization threads here but they all seem to be oldish and i'd like to have a brand new one ready for 2012. I'm currently evaluating Xen, OpenVZ and KVM for virtualization purposes. I'm having trouble deciding what…
elmariachi
  • 43
  • 3
4
votes
1 answer

Why isn't OpenVZ in the Linux kernel by default?

Does anyone know why OpenVZ hasn't been merged into the official Linux kernel? Right now you have to download a special kernel from openvz.org
Sandra
  • 9,973
  • 37
  • 104
  • 160
1
2
3
…
28 29