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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.

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Proxmox 3 cluster configuration disappeared

We have been running a Proxmox VE version 3 system for some time without issues. Abruptly, the /etc/cluster/cluster.conf file disappeared, pve-cluster and cman fell over and containers became inaccesible. We recreated the cluster configuration with…
David G
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Client successfully connects to OpenVPN server but with no internet access over the VPN

I'm trying to setup OpenVPN with static key authentication(instead of TLS) on TCP port 443; but the client cannot access the internet over the VPN after connecting to the server. Here's my current setup: Server It's a Debian VPS running on OpenVZ…
Abdulaziz
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Proxmox - backup OpenVZ on NFS

I'm using Proxmox 3.2 with OpenVZ containers and I'm trying to setup a backup system for my 2 nodes cluster. I created a NFS share on a Debian 7.5 server (not under Proxmox, and not inside the cluster). /etc/exports: /share/ …
PJ Bergeron
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OpenVZ - updating kernel and all containers

Last night I upgraded to the latest kernel of openvz. I rebooted the host node. It came up with the latest kernel. However, the containers are still running the old kernel. What I did on the host node was reboot in CLI to cycle the machine. How do I…
Jason
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Error installing new OpenVZ kernel

Seem to have an error when updating the kernel on a OpenVZ server when running "yum update" im getting the below Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * base: mirror.steadfast.net * extras: mirror.steadfast.net …
toza
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Requirements to move an LXC container from host to another

What are the requirements and things to know to move an LXC container from an host to an other ?
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How to avoid loop limitation in a openvz container?

On a openVZ containing Deb7 I need to lock the maximum size of a folder, which is used to upload on a php based web server. The directory is synced, so I have to lock the maxsize. MAXSIZE should be upgradable by adding some physical disk later ... I…
mat.viguier
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Got more RAM, site slower

I was running my site on 256MB of ram with 2 cores and it was running ok, but I decided to upgrade to 1GB and 4 cores but now my site is slow.. I mean it takes more then 22 seconds to load 1 page.... Here is my top out put: PID USER PR NI …
user221147
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Problems with pid files when restoring OpenVZ snapshot

I am trying different ways to take snapshots of running openvz containers. Following this guide : http://openvz.org/Checkpointing_and_live_migration, I always encounter an issue with pid files missing when restoring the snapshot. The steps I am…
Bruno9779
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Logging connections on a port of a openvz container by iptables

I'm trying to log the connections that are made on the container with the IP x.x.x.x I'm sending an email using postfix by the mail command but I don't see any logs. Here is my configuration: iptables -N LBFT_OUT iptables -A FORWARD -j LBFT_OUT …
ispirto
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"Warning: hostname localhost does not resolve to address ::1: No address associated with hostname" inside an openVZ/Debian container

I'm getting the mesage regulary inside mail.log from postfix. In special, but not only, at mails send received mailman. warning: hostname localhost does not resolve to address ::1: No address associated with hostname ::1 as well as 127.0.0.1…
frlan
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Modifications to sysctl.conf in openVZ container, do they even take effect?

I'm following a security guide(http://www.thefanclub.co.za/how-to/how-secure-ubuntu-1204-lts-server-part-1-basics) to strengthen my OpenVZ based VPS webserver running Ubuntu 12.04 , a part of that asks to make some modifications to sysctl.conf. But…
Rajat Gupta
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No buffers in memory. What it means?

This is a memory stats from my VPS (OpenVZ). $ free -m total used free shared buffers cached Mem: 800 405 394 0 0 405 -/+ buffers/cache: 0 800 Swap: 0 …
oxfn
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Heavy production MySQL/Percona Database in openvz container

So I'm currently running a MySQL 5.1 database, with the following specs: Proc: Intel(R) Xeon(R) CPU E5-1620 0 @ 3.60GHz RAM: 64 Go disks: 2x 100 Go SSD (RaidSoft) I'm planning to migrate my physical server as well as my mysql server to a percona…
Trent
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Certificate issues at OpenVZ Ubuntu containers

today I came up with the problem that certificates cannot be verified on my openvz ubuntu containers. I checked the /etc/ssl/certs folder which is readable and seems to be ok. However, when I try to use wget, I get the following: $ wget…
blacklwhite
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