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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1answer
499 views

ip6tables rules are completely ignored inside OpenVZ container

We have set up IPv6 networking on openvz using bridged veth devices. The IPv6 traffic to and from the VEs works fine. ip6tables works on the HN and iptables work on the VE. Inside the VE we can set ...
3
votes
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 ...
2
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1answer
262 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 ...
2
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1answer
497 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 ...
1
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1answer
98 views

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 ...
1
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1answer
333 views

Proxmox vps container connection problems

I have Proxmox on my node server which have ip:5.189.190.* and I created openvz container on an ip : 213.136.87.* and installed centos 6 on it The problem: Cann't connect to container ssh directly ...
1
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1answer
756 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 ...
1
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1answer
180 views

OpenVZ VMs redirect to main node?

I have a new fresh CentOs 6 machine and have SoulsVM and OpenVz installed on it. When I create VPS it came online with no problem. When I try to SSH to the VPS it gave me "Access Denied." I reset ...
1
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1answer
54 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 ...
1
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1answer
476 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) ...
1
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1answer
288 views

OpenVZ with RHEL6 kernel & page cache?

After upgrading kernel from debian 2.6.32-openvz-amd64 to RHEL6 2.6.32-042stab035.1, I have problem with kernel page cache. Looks like no OpenVZ containers use page cache and now I have 10-15GB free ...
1
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1answer
436 views

help to optimize container

I have an openvz node with only one container (Cpanel server). Yesterday I had many memories issues: Unable to fork: Cannot allocate memory Can someone help me to optimize my node setting ? I ...
1
vote
1answer
373 views

Openvz VE issues after upgrade

i'm running openvz on ubtunu Lucid (kernel 2.6.32.28-openvz-pae). the templates i used are ubuntu 10.04 ones. i tried to upgarde one of my two VEs from 10.04 to 10.10. The process was broken (the ...
1
vote
1answer
178 views

openvz node with only one vps

I have an openvz server with 2Gb ram and would like to configure a vps for use all server resources (no swap). I run: vzsplit -n 1 -f vps1 -s 0 and have this setup: Configuration file generated by ...
2
votes
0answers
298 views

Using ufw on OpenVZ-based VPSes

I'm facing with a problem to set up ufw on Ubuntu 12.04 running on an OpenVZ-based VPS. I know there is limitations for ufw. I googled a bunch of articles how to resolve the issue (like: ...
2
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0answers
72 views

Ghost user in debian?

I have an openvz vps with debian, I am new to linux and the command line environment although i can setup a webserver. I have just noticed that there is a ghost user because when i execute /usr/bin/w ...
2
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0answers
883 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 ...
2
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0answers
491 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 ...
2
votes
0answers
64 views

VE not stopable

One of my VEs sometimes stops working. I cannot reach it via HTTP, FTP or SSH, I only can enter it per vzctl enter X All tries to restart the VE result in a 'Operation timed out', even if I try ...
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0answers
36 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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0answers
471 views

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 ...
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0answers
301 views

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 ...
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0answers
78 views

SolusVM Ubuntu 13.10 OpenVZ networking issue/bug

I currently have a server running SolusVM and using OpenVZ virtualization. I downloaded the new Ubuntu 13.10 from their official repo http://openvz.org/Download/template/precreated and installed it on ...
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459 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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0answers
160 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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0answers
249 views

Truncated HTML responses with OpenVZ (and nginx)

I'm running nginx in a OpenVZ container on Debian 6 and when proxying I get truncated responses. Most of the time it happens when I proxy another proxy like varnish or apache (for svn servers). I ...
1
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0answers
164 views

Internet inside VE with fedora 14 and openvz rhel6 repo

Ok, so here is the set up: I've got fedora 14 running inside latest virtualbox with nat and networking is working. Inside this fedora I have installed openvz from the rhel6 repository and have setup ...
0
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0answers
13 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 ...
0
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0answers
21 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 ...
0
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0answers
11 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 ...
0
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0answers
12 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 ...
0
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0answers
34 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 ...
0
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0answers
26 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 ...
0
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0answers
58 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 ...
0
votes
0answers
40 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 ...
0
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0answers
138 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 ...
0
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0answers
217 views

OpenVZ: Simfs vs Ploop

Till now I was using Simfs for my containers and as I don't need any space restrictions, it fit me well. What is the advantage of ploop? From my point of view, it just forces me to set the space ...
0
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0answers
84 views

Dealing/Fixing the Ploop issue with OpenVZ — relclaiming lost space

So OpenVZ Ploop has a bug where if users add then delete files the space becomes unclaimed and the disk eventually runs out of space. Now there is a script that fixes that(included below). However, ...
0
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0answers
152 views

Proxmox OpenVZ and KVM talking on one host private IP's

I have a proxmox server running version 3.2-132, here's the relevant version information: root@sol:~# pveversion -v proxmox-ve-2.6.32: 3.2-132 (running kernel: 2.6.32-31-pve) pve-manager: 3.2-4 ...
0
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0answers
26 views

one email server per domain in a shared hosting environment or one global server?

I'm about to setup a shared hosting server for a few projects and domains. I will separate each project from each other with openvz. However I don't know yet,how to handle emails. Is it better to ...
0
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0answers
113 views

MariaDB inside Ubuntu OpenVZ CT: Error on delete of '/tmp/#sql' (Errcode: 1 “Operation not permitted”)

I've installed MariaDB 10.0.12 on a fresh OpenVZ container: ubuntu-14.04-x86_64-minimal.tar.gz. Unfortunately when I browse tables via Adminer I keep getting errors like these: Error on delete of ...
0
votes
0answers
81 views

SSH chroot solution for Mutt

We have an environment tailored for our users to log in via ssh and instead of gaining access directly to a shell, users have a script in place of a shell. The script simply launches Mutt on the ...
0
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0answers
90 views

openvz tar implausibly old time stamp

I'm trying to restore a 26 G tar dumpo of an openvz container. The problem is, that when untarring this error comes up: implausibly old time stamp 1969-12-31 18:00:00 and the it doesn't finish the ...
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0answers
29 views

Automated hostname availability for OpenVZ environments

for several years now I am administrating some OpenVZ Hardwarenodes with a fairly low amount of containers per node (10-20). I'm about to setup a new machine, and what's always bothering me is the ...
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0answers
125 views

How to diagnose sporadic performance issues?

I have a web application with very varying response times and can't find out what causes that. That's the (quite complicated) setup: Powerful (i7, 32GB RAM) dedicated server in a German data center, ...
0
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0answers
120 views

Can't run CSF on the host machine using Open VZ

I managed to configure CSF on my three VM inside OpenVZ, but when I try to run it on the host, all the VMs become unreachable. I can see that the host is been attacked, and it would be critical if it ...
0
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0answers
59 views

Where can I find the range of IP addresses of my container OpenVZ

I'm looking for the "range of IP addresses of my container"... Where can I find those ? /etc/network/interfaces ? ifconfig ? I don't know and I can't find any answers... I need it for this tutorial ...
0
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0answers
366 views

CentOS 6 VPN or Proxy Server compatible with OpenVZ

So I tried to install an L2TP/IPSEC VPN on CentOS 6 using ipsec-tools and racoon. Unfortunately my VPS host uses OpenVZ which is apparently incompatible with IPSEC. (Of course if someone knows how to ...
0
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0answers
107 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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0answers
18 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) ...