OpenVZ is an open source virtualization 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 other virtualization technologies.

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OpenVPN No Connect/Timeout

I have 2 OpenVZ Ubuntu servers hosted with a vps vendor, both with an OpenVPN link back to the office network, along with several transient laptops/android phones using the vpn with all working ...
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2answers
348 views

Allowing outbound traffic with APF/iptables for OpenVZ container

I have apf installed on a OpenVZ container (proxmox 2.1). The config is pretty much vanilla and things are working. My external services like ssh and http are working. My problem is that all ...
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248 views

Using virsh to control KVM and openvz

On different servers I'm using virsh to manage openvz containers or KVM guests. No I have a server with both, KVM and openvz installed and would like to controll both with virsh. I can't figure out ...
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93 views

Installing OpenVZ inside debian 6.0?

I have a little problem. Basically I have dealt with a VPS for quite a while and decided to make the jump to a more powerful dedicated machine, and then split that into various VPS' for different ...
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322 views

OpenVZ High container load average, < 1 host load

This is something that has been confusing me for a while and I honestly can't figure out what is going on. I run several OpenVZ host servers for my own personal use and there is this one particular ...
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1answer
758 views

How to run fsck on a simfs filesystem under openvz

How do you do a fsck on a simfs filesystem under OpenVZ? You're supposed to not run fsck on a mounted FS. Can you just fsck the image (/vz/private/100 or whatever it's called)? Sorry I can't tag ...
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1answer
218 views

No SSH password prompt

I'm trying to reach Centos based VPS in OpenVZ. User prompt goes well, but after I type username, press Enter no password prompt occurs and server drops connection by timeout in a few seconds. ...
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1answer
262 views

Is there a way to disable burstable RAM within OpenVZ?

I've had a few pretty idle VPS under OpenVZ, and while I generally don't reach the guaranteed RAM, it bothers me that my VPS "thinks" it has more RAM than it actually does. After all, exceeding the ...
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1answer
123 views

Is there any advantage of using OpenVZ on a dedicated server for single-use?

We are leasing a dedicated server where we plan to host an XMPP server. Currently, Debian is installed. Our current requirement is this will only be the production box; however, this could change if ...
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2answers
903 views

Why can't I change the mode of /proc/sys/kernel/pty/max even when I am root?

Since pty is limited, I want to modify the content of /proc/sys/kernel/pty/max. The original value in max is 4096, and now I want to modify it to 10000. [root@home pty]# pwd /proc/sys/kernel/pty ...
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1answer
400 views

OpenVZ tells me: hostname: the specified hostname is invalid on boot of the VE

I’m using Proxmox 2.1, which is based on Debian 6, for my OpenVZ installation. Which shouldn’t matter but I wanted to mention it before I begin with my problem. I imported several VEs into my newly ...
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1answer
47 views

Is there any way to know when resources in user_beancounters hit barrier

When I look at /proc/user_beancounters there is some failcnt on kmemsize and tcpsndbbuf. Is there anyway to know when they got incremented? Do we always need to track the count and display in graph or ...
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2answers
2k views

Screen - No more PTYs - Cannot start screen's on Debian VPS

I've gotten a newly imaged Debian 6 32 bit VPS. While configuring I tried to test screen as a number of my scripts run using it. Root has no problem running screen. But of course this is ...
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1answer
3k views

Mount Windows share via CIFS in CentOS not working (but smbclient does)

I'm a bit frustrated...I'm trying to mount a windows share via CIFS in CentOS 6.3, but it's not working: mount -v -t cifs -o credentials=/data/conf/credentials/fileserver //10.0.1.200/projects ...
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341 views

OpenVZ kernel panic

I recently installed OpenVZ on my VMWare box (To do some testing) and I get the following: https://www.dropbox.com/s/p38btkv5j84bvsh/Capture.JPG the GRUB config is as follows: # grub.conf generated ...
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67 views

ruby on rails process stuck at 0% cpu (Yes, 0%) on a leased VM

I have a leased openVZ linux vm over at chicagovps.net. I am trying to deploy a ruby on rails application on the same. The problem is: when I run the rails server process, I see that during server ...
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2answers
594 views

Sharing disk volumes across OpenVZ guests to reduce Package Management Overhead

Is it feasible to create a single "master" OpenVZ guest who would only be used for package management, and use something like mount --bind on several other OpenVZ guests sort of trick them into using ...
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816 views

Why is my cron daemon is being killed every few minutes?

As of about a week ago, my cron daemon refuses to stay running. I'm using Debian 6 x64 on an OpenVZ virtual machine. Running something like pgrep cron shows that the daemon isn't running. I start the ...
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518 views

Bringing an IPsec tunnel on the hardware node to the OpenVZ containers

I have a server hosting OpenVZ containers. An IPsec tunnel is configured on the hardware node (HN) and I'd like to make the remote network available in the containers (CT). How can I do this? The ...
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1answer
2k views

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 ...
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1k views

How to find the real memory usage in openvz?

I heard that in OpenVZ, free -m doesn't give the correct results. So, how to get it? Here's the result of my cat /proc/user_beancounters"... How much ram am I using? What value to check? Version: ...
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1answer
257 views

VPS extremely slow at compression [closed]

I have a VPS on Open-VZ, and the server is supposed to have 4 cores 3.0Ghz Xeon CPU. The usage is normally close to zero. When I compress a file (using zip, tar.gz, or 7z) it take too long for such ...
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2answers
2k views

How do I enable swap file on my server?

I've followed this but when I run:- #swapon /swapfile1 I get::- swapon: /swapfile1: swapon failed: Operation not permitted The system is extremely slow with 1GB of RAM trying to run ...
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625 views

Openvz: What exactly does it mean when tcpsndbuf failcnt increases? Why must there be a minimum difference between limit and barrier?

When the failcnt of tcpsndbuf increases, what does this mean? Does it mean the system had to go past the barrier, or past the limit? Or, maybe, that the system failed to provide enough buffers, either ...
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297 views

Running OpenVZ virtual servers within a Xen XCP vritual server? Bad practice?

I have a 1 server with 8GB RAM and 2xQuadcore Processors. It currently has the Xen XCP installed on it, and centos6.2 x64 running on a virtual machine. I have a server control panel software that I ...
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2answers
1k views

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 ...
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2answers
874 views

How do I rebuild a VM using Proxmox control panel?

I'm using Proxmox Virtual Enviroment (v 2.1) to manage my openvz virtual machines. Sometimes I want to rebuild a virtual machine with other openvz container template, but I couldn't find any tools in ...
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2answers
325 views

Server mysteriously rebooting

I have a VPS that almost daily performs a reboot. I finally managed today to get a clue from my logs May 12 03:14:49 sshd[19379]: Did not receive identification string from 173.212.118.167 May 12 ...
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1answer
124 views

VPS Node and top -c

When using and viewing top -c with openvz does the CPU usage and everything include usage for everyone else on the system or just you? I've been watching my VPS node for awhile now and I've seen ...
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92 views

OpenAFS on OpenVZ guest

I'm trying to install and configure an OpenAFS server inside an OpenVZ container. However, when running afs-newcell, it complains that the AFS client cannot be started. It says "AFS module ...
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1answer
315 views

I want to run MongoDB on OpenVZ, but crashes expected — what can I do about it?

My Server is hosted on HostEurope, a virtual server uname -a prompts Linux lvps176-28-21-237.dedicated.hosteurope.de 2.6.18-028stab095.1 #1 SMP Mon Oct 24 20:15:15 MSD 2011 x86_64 GNU/Linux They ...
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1answer
400 views

Anyone using Archipel in production for managing virtual machines?

I am getting ready to deploy a new server for my company. We intend to use virtualization mainly for security but also to help with versioning and other issues. We have decided to use openvz. Now I ...
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3answers
399 views

dedicated server virtualization, xen or openvz?

I am putting a new server in a datacenter for company use and my company website. I use a lot of VPS accounts and in that world the choices are xen or openvz. I will be using virtualization on my ...
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1answer
332 views

Translating debian network configuration to gentoo

I just got rid off Debian on my VPS (OpenVZ) and installed Gentoo on it, however it is a plain Gentoo image without further configuration, i.e. no working network. I'm not familiar with Debian and ...
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1answer
156 views

Is there a way to run OpenVZ on a filesystem that doesn't need to fsck?

I'm running OpenVZ, and occasionally need to power cycle my host. Of course, it has to fsck every time it comes back up (ext4) Is there a way to run OpenVZ on a filesystem that doesn't have to fsck in ...
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0answers
378 views

Replacing TightVNC with alternate client (CONNECT parameter)

I am in the process of reverse engineering an existing system in an attempt to replace their existing TightVNC applet with something else (hopefully NoVNC if at all possible). So far, here is what I ...
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1answer
737 views

OpenVZ Can't initialize containers after install

I have installed OpenVZ on centos 6 on a dedicated server. I followed quick installation guide on openvz wiki. After installing thru yum, I don't know why, but grub.conf wasn't automatically updated ...
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147 views

Performing yum update on an OpenVZ host

My company runs a handful of OpenVZ servers (HN) and hosts all the server as containers on these HNs. We have done some pentest and found out we have to do update the kernel on the HNs to resolve a ...
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1answer
708 views

OpenVZ + CentOS 6.0 + Home Network [closed]

Setup a centos 6 server at home and installed openvz kernel and all working fine. My only issue is routing IPs to the containers (typing the different IPs in from another PC showed my default web ...
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3answers
1k views

NFS4 client within OpenVZ container running Ubuntu 11.10?

I have an Ubuntu 11.10 VPS running inside OPenVZ with a hosting company. I'm trying to get it to mount a remote NFS server using NFS4, but can only get it working using version 3. I've been Googling ...
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4answers
632 views

Private Cloud: Debian and OSS vs vmware vSphere, which is best for corporate use? [closed]

I'm hoping someone can shed some light regarding the current state of virtualization on Debian. Since I like my information first-hand, i thought I'd ask here for some real-world use cases. I am ...
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1answer
342 views

CentOS OpenVZ fail to boot after kernel update

After upgrading to latest OpenVZ kernel CentOS server won't boot. When i try go boot the latest kernel server is stuck at this point: (note that images are taken from virtual kvm) ...
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1answer
856 views

OpenVZ container can't reach the internet

I installed OpenVZ on my Debian 6 server which has only 1 IP. So I tried to follow this guide on the OpenVZ wiki, but alas only with partial luck. I succesfully forwarded port 8090 of the Host server ...
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1answer
1k views

permission denied for chmod as root

I need to manage a customer's openvz guest (latest debian squeeze 64 bit). Now when I try to do a chmod 0750 /root as root it gives me Permission denied. This really puzzles me, as I thought root can ...
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453 views

How to see what is causing failcnt on tcpsndbuf

I am seeing a failcnt on my tcpsndbuf by looking at the user beancounters. How am I able to see what is causing this failcnt? I am experiencing problems with my server and I think that it is as a ...
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1answer
1k views

Jenkins (JVM) crashes after few minutes after start

Host OS: OpenVZ host Guest OS: Debian 6.0 minimal Java: java6 sun Servlet container: Winstone Jenkins for debian: http://pkg.jenkins-ci.org/debian/ Jenkins version: 1.449 uname -a: Linux hostname ...
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161 views

auto add ip to containers using openvz commandline

looking to script some container creation. Is there a way to use the PBAS auto add ip function at the node's command line? Something like this. vzctl set CTID --ipadd AUTO_IP_ADDY --save I could ...
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2answers
901 views

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 ...
8
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1answer
2k views

Is LXC secure enough for VPS hosting?

Right now I'm using Linux VServer for VPS hosting. But it's lacking some functionality I need (ex. cpu usage virtualization, quota support for guests, etc.) so I'm thinking about switching to OpenVZ ...
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55 views

How do I investigate new transaction behaviour between Mysql 5 and JBoss 4.02 inside OpenVZ?

I have moved a production server over to OpenVZ, something that I've done many times before, only this time it has impacted the transaction behaviour of certain operations. All my tables are innoDB. ...