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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User Disappeared on openVZ container with CentOS

I cant switch to jenkins user on this OpenVZ container There is still jenkins process running, which was started by this user I tried # su jenkins it does not switch to jenkins user /etc/groups ...
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26 views

OpenVZ can't reach the internet [on hold]

I have a vps running and it seems to be ok, but I am unable to access to internet. I am only able to access the internal network. What I want to do is give the vps a ip (access to the outside world), ...
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1answer
42 views

How do hosting providers give each container a unique public IP? [on hold]

I'm looking in to starting my own hosting company; even if I'm only paid in experience. At first, I thought I'd create shell scripts to automate the creation of OpenVZ containers. But then I ...
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1answer
1k 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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1answer
31 views

IP Rotation using iptables on OpenVZ [duplicate]

I want to set IP Rotation using iptables so I am using below code.My server Virtualization Type is OpenVZ. My server provider has enabled all the options then also don't know what is the wrong, It is ...
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1answer
16 views

Ping from OpenVZ host to container

I have a host with multiple containers. I would to ping from the host to container, and vice versa. Currently ping works only from inside a container to the host, e.g.: root@c1313s02:~# vzctl enter ...
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2answers
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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1answer
22 views

Native software on dedicated machine vs virtualizing services on dedicated machine

I used to have a VPS, and the benefits of a VPS are pretty obvious: instant snapshots, instant booting, instant and one click changes rollback (so if I mess up really bad, even losing network ...
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1answer
47 views

SSD caching using bcache or dm-cache on kernel 2.6.32-042stab104.1

I'm looking to use bcache or dm-cache with the latest OpenVZ kernel (2.6.32-042stab104.1) on CentOS 6. Unfortunately, dm-cache and bcache are part of kernel 3.10, but I know the OpenVZ kernel has a ...
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1answer
17 views

openvz: limit resource usage of common services?

I am running Ubuntu 14.04 LTS inside a OpenVZ (Virtuozzo) container. There are basic services running (Apache, Postfix, Dovecot, MariaDB, OpenVPN, LDAP, memcached, php-fpm, nscd) and I am already ...
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21 views

Proxmox Console to OpenVZ Container has two login shells

I am using ProxmoxVE. Proxmox is running in Stand Alone Mode. I have a variety of CentOS 7 containers running. When I try to use the "Console" button to login to the machine I am presented with two ...
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2answers
87 views

Running containers inside a virtual machine?

It is my understanding that containers are much more lightweight than VMs because they do not virtualize the hardware but instead just isolate the software running in them from software running in ...
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2answers
2k views

OpenVZ MySQL InnoDB won't start

I have a OpenVZ Server with 4GB RAM and have tried to install MySQL on several distros (Ubuntu 12.04 64Bit, Ubuntu 12.10 64Bit, Debian 7 64Bit) and I always get the same errors: 130718 6:57:27 ...
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84 views

firewalld service is running, but firewall-cmd doesn't work

I am new to Centos 7/Server management. I am trying to figure out how to work with firewalld. my kernel release is: 2.6.32-042stab084.20(OpenVZ) And: #firewall-cmd --version #0.3.9 The problem is ...
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2answers
61 views

OpenVPN don't start: --cert fails with 'client.crt': No such file or directory

I have a VPS Server running with openVZ and CentOs 6 and I want to install openVPN on it. I followed this tutorial: ...
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33 views

OpenVZ container doesn't start, “unable to read inode block”

I'm having some problems with OpenVZ/Ploop. Installed OpenVZ on a brand new thinkserver today. My /vz/ partition is ~5.2 TB large (4x2TB RAID 5). When I try to create/start containers ploop fails with ...
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21 views

OpenVZ Throttle Container CPU

I'm looking for a way to throttle OpenVZ containers CPU after it's hit a certain load limit automatically. IE: container 101 hits a 3.0 load, I want to throttle the CPU down to 1.0 for a limited ...
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1answer
915 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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21 views

Tracking user activity in openvz container?

I have been trying to figure out a way to track user activity in an openvz container for a long time now (auditd like in KVM's). This is a PCI-DSS requirement. I can't seem to find any good ...
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40 views

Cannot start OpenVZ container

When I try to start container I got Starting container... Opening delta /var/lib/vz/private/100/root.hdd/root.hdd Adding delta dev=/dev/ploop15117 img=/var/lib/vz/private/100/root.hdd/root.hdd (rw) ...
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2answers
40 views

resizing a Debian linux partition without losing data

i have made by mistake a small partition partion on my Debian installation and after installing openvz on this bare metal server i notice that i created production vps on this partion and that it ...
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1answer
705 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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1answer
738 views

How to edit or create roles in Proxmox VE?

How can I create Roles or edit them with specific privileges in Proxmox VE ?
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35 views

Managing OpenVZ containers with Ansible

Is there any elegant way to manipulate OpenVZ containers with Ansible? Sure I can install an SSH daemon on each and put my public keys, but as soon as there is a vzcl enter command maybe there is a ...
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30 views

OpenVZ, veth interface and getting ip from dhcp from the inside of containers

I have OpenVZ server (centos) with one interface eth0, also I have dhcp server in the same network. I need container with ip from dhcp server. So, I created guest node with the veth interface, after ...
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34 views

Enable IP forwarding inside an OpenVZ container but disable it on host

Is it possible to enable IP forwarding inside an OpenVZ container but keep it disabled in host system? I understand that OpenVZ containers and host share kernels, but I can use sysctl to set ...
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141 views

OpenVZ containers will not start after a reboot

vzctl start 192 Dump file /vz/dump/Dump.192 exists, trying to restore from it Restoring container ... Opening delta /vz/private/192/root.hdd/root.hdd Data cluster 1112 beyond EOF, vsec=47137... FATAL ...
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10k views

iptables nat does not exist

Today my iptables nat on the host system stopped working and I have no clue what happend! (That's very bad, I know) All commands are executed as root user. If I run $ iptables -t nat -L I get the ...
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45 views

OpenVZ : live migration fails

I can't launch live migration of OpenVZ container between two proxmox nodes... Feb 05 03:30:27 starting migration of CT 102 to node 'madrid' (xx.xx.xx.xx) Feb 05 03:30:27 container is running - using ...
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2answers
238 views

Can you use CGroups inside an OpenVZ Container?

just a quick question, which i have had trouble finding the answer to: The OpenVZ Authors have been contributing a large amount of code to the linux kernel, in order to get virtualization features ...
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2k 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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1answer
58 views

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 ...
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45 views

My server boots a kernel I don't recognize

On my dedicated server I'm running Debian 7.5 as an OS. I have installed OpenVZ for amd64 architecture to use the benefits of virtualization but after successfully installing it (following these ...
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1answer
81 views

fdisk -l return cannot open /proc/partitions

I have a Debian server with 4.5Go on the /dev/simfs partition. Filesystem Size Used Avail Use% Mounted on /dev/simfs 4.5G 3.2G 1.3G 72% / tmpfs 474M 76K 474M 1% /run ...
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44 views

Bridge configuration on OpenVZ

I have been using an OpenVZ environment left behind by a previous employee. A while ago I needed to use virtual eth devices to try a specific application. After removing VETH might have misconfigured ...
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5answers
4k views

Stop an unstoppable openvz container

I have an openvz container that is NOT stopping with the standard vz tools. How can I kill it? I tried a VZ destory but that wont work. Thanks
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1answer
1k 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
277 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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1answer
572 views

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 ...
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79 views

Limiting OpenVZ SMTP Per Hour

How would I limit SMTP connections per hour on the host node for a /24 block? For example, I want to limit it to 50 emails per hour. Thanks
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29 views

Ordering mount --bind and OpenVZ start on boot

I am using mount --bind to share some directories/files between containers. My issue is that on root server boot, the containers are started, but these mounts are not yet mounted. Some of the services ...
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3answers
1k views

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: ...
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1answer
97 views

Got more RAM, site slower [closed]

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.... ...
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1answer
353 views

CentOS 6.3 Virtual under OpenVZ cannot ping, host lookups, outbound connections while postfix running

My best theory is that some kernel limit is being hit preventing outbound connections. We have tried basically everything from tcpdumps to provisioning an entirely new virtual server (we do not have ...
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69 views

Ploop vzctl compact ctid unable to reclaim

I have tried using the scripts and also command vzctl compact ctid to reclaim the new free space for the vps with the ploop, but it do not extend the free space. I am getting following result: Trying ...
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1answer
75 views

Run 'rng-tools' in OpenVZ container

I have a problem with run 'rngd' inside OpenVZ container: root@server:~# rngd -r /dev/urandom unable to adjust write_wakeup_threshold: Permission denied Is it possible to run an application in ...
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1answer
104 views

Is Ploop a bad idea for OpenVZ?

I know that with Ploop you lose disk space as files are added/deleted within a container and you have to manually compact the container, but i have also read that if you reboot or there is a crash the ...
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41 views

Does updating vzctl and ploop require server reboot?

If we yum update vzctl and ploop on centOS 6, 64-bit, does that require we reboot the server, or stop and start all containers? Just trying to understand if a normal yum update for these two software ...
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147 views

OpenVPN Port forwarding on a OpenVZ VPS

I've been trying for the past 3 hours to forward the 443 port from my client to the 20443 port on my server (CentOS 7 on OpenVZ), so i can access it on myserverip:20443. I have OpenVPN Access ...
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1answer
109 views

OpenVZ Container Restart [closed]

I'm wondering if there are any public scripts to automatically restart OpenVZ containers on certain load amount / high cpu. Trying to limit my containers on my personal machine, thanks.