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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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Linux server filesystem issues

I have a vps with file system trouble and the provider has been unable to fix it. If /dev/simfs is missing on a clean install (CentOS 5.5), and not created later, will this cause serious problems with a file system using (Root filesystem) SIMFS…
This_Is_Fun
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How can I test hd performance on an OpenVZ container?

CentOS 5.x | VPS | OpenVZ I'm trying out a vps that uses OpenVZ and am not sure what command to type to measure disk read performance. I thought hdparm would work but I get the following: [root@echo dev]# hdparm -t /dev/simfs /dev/simfs: Permission…
Mike B
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What is the best practice to backup OpenVZ containters?

I'm running Linux server with OpenVZ containers. I back up data with rdiff-backup in two steps (to minimalize downtime). First step is on live containter, and second step is on suspended container. Is there a better way to back up OpenVZ…
miHost
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iptables prerouting to redirect source ip address on ethernet

I have 2 ip adresses on the Internet who redirect on the same machine. On this machine, one Debian runs on OpenVZ. I can set iptables rules to redirect all http request to the Debian. iptables prerouting -d ip_address_2 DNAT --to…
Kevin Campion
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openvz and iptables

http://wiki.openvz.org/Setting_up_an_iptables_firewall mentions to load xt_state before starting a container in order to run iptables in containers. so I ran modprobe xt_state on the host and restarted the container and it worked great. To make…
rizen
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Partitioning recommendations for a Proxmox VM Server (OpenVZ)

We are new to virtualization and we are planning to turn our online server into a virualized one, mainly for maintenance, backup and recovery improvements. Initially we would only have one real virtual system with load plus 1-3 copys for testing and…
luison
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OpenVZ and VMWare Server 1.x on the same Server

Has any used a server to run both OpenVZ and VMWare Server? Are there any issues with doing this I should be aware of?
Kyle Brandt
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Some docker containers fail to start with OCI runtime error after uprade to Virtuozzo 7

the hosting provider of my KVM (Strato) recently upgraded the version of Virtuozzo they were using from 6 to 7. Since then a few of my docker containers fail to start with the following error message: ❯ sudo docker start spring_webapp Error…
fiendie
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OpenVZ Host is the source IP address rather than actual web surfers?

I am experiencing something a little bit odd. I'm running OpenZV on a CentOS 5 server. It appears that on containers the source IP address that say Apache webserver sees a request from is the OpenVZ Host's IP address rather than the actual surfer's…
Jerry Tunin
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Apache karaf out of memory error

I am working on a virtual server from a local online hosting service where I would like to run an apache karaf instance. During start-up of the server, I get out-of-memory exceptions: Exception in thread "Karaf local console user karaf"…
Beginner
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OpenVZ (CentOS 7) no internet access while it worked before

Strange problem here ... I am using OpenVZ and have 3 containers. My setup worked fine for 3 years and yesterday something happend and i can't seem to find the issue on one container. The other 2 works as expected. This is my openvz…
Patrick Simard
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Can a Centos 7 OpenVZ Container run on a Centos 6 Node

Since OpenVZ isn't actually virtualization and just a container would there be issues setting up a CentOS 7 container on a Node that is only running CentOS 6?
Analog
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OpenVZ to VMware / Hyper-v / KVM convertion

vzctl - 4.1 guest os - altlinux 5 (2.6.32) filesystem - simfs no ploop I need to convert/migrate/relocate a bunch of containers from legacy openvz server to vmware/kvm/hyper-v system. I tried to create vm and install the same altlinux 5, after that…
shallrise
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Inaccurate memory usage reading under OpenVZ?

I have got an OpenVZ-based VPS running CentOS 7.4 (Linux hostname 2.6.32-042stab116.2 #1 SMP Fri Jun 24 15:33:57 MSK 2016 x86_64 x86_64 x86_64 GNU/Linux). The workload is a single Java application. According to top, the java process consumes about…
minexew
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How to set RAM limit inside OpenVZ container

I had VPS on OpenVZ (Ubuntu Server 16.04). My hoster made some weird migration and put that container inside KVM. So now it looks like I have 8 exabytes of RAM: $ free -h total used free shared buff/cache …
Deliaz
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