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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Can't SSH to localhost

I've spotted a problem on one of my openVZ Containers. There is a tool running for managing git repositories on a server which needs to connect this server by SSH. That tool is running on the same ...
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130 views

Get an OpenVZ container's cpuload realtime in a bash script

I have a bash script which uses CPU cores rather intensively. Recently my VPS was suspended due to server load. The main reason is a cron job for a bash script which checks for Wordpress plugins and ...
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1answer
372 views

Cloning OpenVZ container

I have an OpenVZ container on 1 host and I would like to clone it over to my server. both run SolusVM. I only have root access to my server and would like to host the container on my server now. Can ...
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1answer
2k views

OpenVPN-AS not starting

I have been trying to get an OpenVPN Access server running but I am having a lot of trouble. I have a host node running Proxmox and I would like an OpenVZ container to run the server. I have gone ...
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1answer
316 views

Best Guest OS for running FreeSWITCH under Proxmox

We have a lot of Asterisk systems running on dedicated machines and would like to use FreeSWITCH to replace a number of them. One of the advantages of FreeSWITCH is supposed to be that it is doing ...
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465 views

openvz: making directory /run/shm persistant?

I just upgraded my server to ubuntu 12.04. But the last updates failed because of an error with the update of the package 'initscripts': Setting up initscripts (2.88dsf-13.10ubuntu11) ... mkdir: ...
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1k views

Two IPs - One OpenVPN instance, impossible?

I have a debian 64bit vps, OpenVZ, with perfectly working openvpn server. I have ADDITIONAL IP which I want to use on that same openvpn server and I can't make it work. It only works if I specify ...
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2answers
434 views

IPTables isn't forwarding anything

I currently have set up IPTables on my server to forward certain ports on a specific interface (venet0:1) to a second server, at a different IP. My config file looks like this: # Generated by ...
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228 views

openvz containers optimization

i am trying to optimize 14 containers on 64 G.B ram , 16 Core processor based on Centos 5.9 Final 64 Bit Distribution the load average of the server up to 300 this is my memory stats # vzmemcheck ...
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3answers
832 views

NFS mount failing in OpenVZ container but working in Ubuntu

I am running a debian 6.0 open VZ container and can't get my NFS share to mount. The error I am getting is mount.nfs: mount to NFS server '' failed: timed out, giving up However, using the same exact ...
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133 views

recipient rejected in a SMTP connection from a OpenVz container [closed]

I'm facing a strange problem. I'm getting a recipient rejected on a SMTP server only from inside an OpenVZ container, while from the physical server everything works fine. Here's an example of a ...
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2answers
622 views

Proxmox 2.3 don't use mount script

I am running proxmox 2.3 Since I installed proxmox on a new server I definitely can't use mount and unmount script on a container and I don't know why. Proxmox just doesn't read those scripts. Here ...
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245 views

OpenVZ Host Node and IPTables

Can you use IPTables on the host node or does that effect all the containers on the node? I am unsure as to if using iptables will effect all the containers below or not.
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269 views

OpenVZ - Ubuntu 12.04 unable to enter

I've setup an Ubuntu 12.04 on OpenVZ, it's been created and appears to start up fine. When I try to enter the OS it just hangs. I've ran ps aux with the exec and it returns: USER PID %CPU %MEM ...
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1answer
222 views

Find ddos attack on OpenVZ container [duplicate]

How do you figure out which OpenVZ contain is under attack from a dDoS? I know it is an attack because the b/w and incoming traffic shot WAY up. Can this be done with netstat? Are some attacks not ...
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1answer
493 views

Firewall blocking ssh out from a openVz container

I'm using a firewall on the HN to open/close the ports of the containers directly from the HN. I'm using the iptables script from the openvz wiki. Everything works fine but I cannot ssh out from the ...
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2answers
340 views

How to over 500000 cpuunits on OpenVZ [closed]

I have a OpenVZ and i would like to allocate more than 500000 cpu units. But the max i can set is 500000. Does he have a solution to give more power to my vm? According to all the sources I read ...
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1answer
361 views

Find IP addresses with most connections on system

I am currently experiencing some attacks on my OpenVZ server (CentOS 6.3 64bit), which is saturating the public ethernet interface (currently accessing SSH via the private interface). Is it possible ...
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1answer
477 views

Puppet provider does not install prerequisites

I have cloned a module for virtual machines, but when I try to apply a virtual machine to a node, I get Error: Could not find a suitable provider for virt, which is understandable given that the ...
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1answer
1k views

Does our VPS have its kmemsize limit set too low?

Short Version: Are there any official guidelines on what the kmemsize barrier and limit should be set to for a container in Virtuozzo/OpenVZ intended to be used as a Web server? We've found posts ...
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1answer
61 views

Can you make the /vz directory a symlink?

I have a OpenVZ VPS server with a 500GB hard drive and 240GB SSD. I'd like to have each VM's files stored on the SSD. Can I make their directory within /vz symlink to a directory on the SSD? There ...
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28 views

Are there any rules as to how IP address should be assigned to each container in OpenVZ?

I have OpenVZ running on CentOS system connected to a LAN.The internal IP address of the host machine is 192.168.2.152.Two containers have been created and the IP addresses I assigned are ...
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1k views

Issue on yum update with kernel

--> Running transaction check ---> Package e2fsprogs-resize2fs-static.x86_64 0:1.42.3-3.el6.1.ovz will be installed ---> Package kernel.x86_64 0:2.6.32-358.2.1.el6 will be installed --> ...
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1answer
766 views

Parallels Apache stopped loading virtual host config files? [closed]

Apache on a server i'm helping manage has stopped reading virtual host configuration files. It's OpenVZ with a Plesk control panel. The client used Plesk to create the virtual hosts, and the config ...
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144 views

Infrastructure design recommendations for a simple proxmox setup

I am aware of the dangers of this question being non-constructive so bear in mind I did my best to narrow the possible answers I get. I am swapping an old dedicated Gentoo server for a new one, and ...
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2answers
1k views

How to increase Free PE in LVM physical volume?

I use Proxmox 2.2 for making OpenVZ containers. It ships with a tool called vzdump that can create backups of OpenVZ containers on the fly. It uses snapshot functionality of LVM to create temporary ...
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297 views

`fuse`-like mounts on linux-vserver/openVZ?

I don't know much about servers or virtualization. However, for the last years, I've been using a rented linux-vserver as my backup drive and for recording radio shows through cronjobs. I ran out of ...
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1k views

How do you enter the console of a openvz container from the host?

I lost the password for my OpenVZ container(actually I was using private key ssh but lost the file, so after setup I never logged in with root password) but I still have root access on the host ...
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1answer
442 views

CentOS OpenVZ kernel panic when mounting ext4 truecrypt volume in nokernelcrypto mode

I am experiencing kernel panic when trying to mount a ext4 filesystem which itself resides on a truecrypt volume mounted using -m nokernelcrypto option. The system is CentOS 6.3, OpenVZ Kernel ...
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3answers
125 views

Is there any server virtualization software supports subdomains? [closed]

I installed openvz in my server but to create more virtual machines I need more than one ip address. But my service provider can only give one ip address for my server. Is there any software that ...
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1answer
402 views

How can Apache be installed in a OpenVZ container

I have OPenVZ running on CentOS and a precreated Ubuntu 10.04 OS template installed.The containers created have 2GB of disk space allocated.With this,can I have an Apache web server running within a ...
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121 views

apt-get authentication error in OpenVZ Debian container

Whenever I receive upgraded packages from security.debian.org, I get the following error: WARNING: The following packages cannot be authenticated! apache2 apache2-mpm-prefork apache2.2-common ... ...
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338 views

OpenVZ exec and unable to re-open stdin / Unable to lock the administration directory

I run the following command across all OpenVZ containers to update/upgrade: vzctl exec2 $VM "apt-get update & apt-get upgrade" In all cases, I get the following error: dpkg-preconfigure: ...
2
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1answer
2k views

Identifying performance bottleneck on a high-end VPS (Apache 2.4 event_mpm/lighttpd/nginx)

I have quite a high-end VPS from vpsblast (their SSD13) - 4 cores, 16gb RAM, 320gb of SSD hard drive space on a 1GigE Internet backbone (virtually uncontested). As near as I can tell it is running ...
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1answer
295 views

OpenVZ with VSwap causes php-fpm/mySQL errors on nginx

I'm running into a rather nasty issue, and hope that anyone here can help me with a possible solution as I'm pretty much brickwalling right now. The situation: I have an OpenVZ VPS that is ...
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1answer
537 views

OpenVZ - vzdev kernel module issue

I am setting up a Centos 6.3 minimal server with openvz that replicates to another machine using DRBD. I want all openvz data/files to be kept in a single /vz directory which is an LVM that I am ...
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1answer
366 views

Can't lock vz with proxmox

I would like to backup my virtual servers to move them away. And when i have started the backup process then i only see this every time: Feb 09 08:40:34 INFO: Starting Backup of VM 101 (openvz) Feb ...
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777 views

Centos 6.3 DRBD / OpenVZ kernel/userland issue

When I start my Centos 6.3 server's drbd service I get the following error: Starting DRBD resources: DRBD module version: 8.3.13 userland version: 8.4.2 preferably kernel and userland versions ...
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905 views

Setting up bridging for Qemu and routing for OpenVZ (venet) with multiple subnets on Debian Linux

So i've been searching the past couple days trying to figure out the best way to achieve this but still can't get it figured out. I have a debian server setup running Proxmox to host OpenVZ and Qemu ...
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1answer
300 views

Proxmox server with just one public IP

Is it possible to host a proxmox server with openvz containers NATed to the public IP which hosts the Proxmox server ? I have gone through the proxmox feature list but I am somehow puzzled by the ...
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581 views

GRUB can't configure on upgraded Ubuntu OpenVZ VPS

I upgraded an OpenVZ VPS from an older Ubuntu release to 12.04LTS using the do-release-upgrade command. Ever since, all of my apt-get runs look something like this: $ sudo apt-get upgrade Reading ...
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1answer
322 views

openvz dual nic setup from scratch

I have a openvz server that has 2 nics I need 1 for ethernet and the other explisitly for nfs traffic. eth0 goes to the lan/internet currently doesnt have ipv6 but will be getting a static ip soon. ...
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1k views

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 ...
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2answers
608 views

Tuning OpenVZ Containers to work better with Java?

I have a 8 GB RAM Server (Dedicated) and currently have KVM Virtual Machines running on there (successfully) however i'm considering moving to OpenVZ as KVM seems a bit overkill with a lot of overhead ...
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1answer
159 views

OpenVZ has vzctl exec, what is the equivelent for lxc

I'm switching from OpenVZ to lxc. The one thing that is really bugging me is that I can't find a lxc alternative to vzctl exec. Before on OpenVZ I could do vzctl exec 1033 restart nginx. Now, all I ...
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1answer
2k views

How to create a LXC container on LVM from an OpenVZ template?

I have a lot of experience using OpenVZ, but I want to give LXC a try on a server where perfect isolation is not a concern. The main reason for the switch is preferring Ubuntu Server LTS as the base ...
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1answer
834 views

CentOS 6 and Sun/Oracle Java Issue [duplicate]

Possible Duplicate: Linux out of memory on VPS I have a OpenVZ VPS running CentOS 6.3 64 bit and when I try to install JRE 7 64bit using the command: rpm -Uvh java.rpm It gives me this ...
2
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1answer
903 views

PPTP installation on CentOS 5 not working (Kernel support for PPP?)

I am trying to get PPTP installation up and running on my VPS. I have followed various guides, however, I am unable to connect to the VPN once it’s setup. I checked my VPS’ /var/log/messages and I ...
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2answers
2k views

how to drop_caches in OpenVZ centos6 container

I have tried sudo sh -c 'echo 3 > /proc/sys/vm/drop_caches' sudo echo 3 > /proc/sys/vm/drop_caches echo 3 > /proc/sys/vm/drop_caches echo 3 | sudo tee /proc/sys/vm/drop_caches and a ...
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87 views

How do I skip the installation of grub in my VPS?

I am upgrading Ubuntu 11.04 to Ubuntu 11.10 and it asks me to install grub, I do not want to do so as I am in a VPS, how can I skip installation of grub ? If I close the session, then it shows ...