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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IPSec on OpenVZ multiple ip addresses, using 127.0.0.2 on venet0

I have an OpenVZ box with IPSec enabled. root@wa000:~# ipsec verify Checking your system to see if IPsec got installed and started correctly: Version check and ipsec on-path ...
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1answer
12 views

OpenVZ Host Node showing up in traceroutes

I've installed SolusVM as a Master server that will host OpenVZ containers on a fresh install of CentOS 6.6 What i am now noticing is that if i traceroute one of my containers IP addresses i see the ...
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26 views

Port Forwarding through OpenVPN to Client on OpenVZ

Edit: Okay I will try to make this more clear. What I am trying to achieve is simply a port forward, through my OpenVZ hosted openvpn server, to a service running on a client. There are a few ...
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16 views

OpenVZ: Node iptables doesn't append rules

I want to make a set of rules on iptables inside of a node, but it seems that the iptables isn't appending all the rules or somehow and kick me out everytime I run the following script (I'm using this ...
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17 views

LXC containers on a OpenVZ VPS

I am trying to run LXC on a VPN that is hosted in OpenVZ, I have tried doing this with multiple image flavours, ubuntu. centos, debian... with no luck. LXC installs correctly but containers fail to ...
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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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27 views

Debian limit number of TCP sockets for a process (especially tor) on OpenVZ

I have a debian 7.8 server, running on OpenVZ. On this server I'm running a tor relay and some other network services (like apache and mysql). However the tor service seems to eat up all my available ...
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19 views

IP from multi gateway, openvz debian

I have a problem with network in my dedicated server. I have a host: ip 188.60.240.71 netmask 255.255.255.128 gateway 188.60.240.1 broadcast 188.60.240.127 network 188.60.240.0 I order additional ...
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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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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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26 views

How to clone a VPS with OpenVZ [closed]

So I recently started reselling unmanaged VPS. Now I thought it would be nice if my customers could monitor their VPS and control it via a web panel thus I planned to install OpenVZ. I now want to ...
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19 views

OpenVZ add physical server auth key/ no localhost?

Okay so i have setup openVZ Webpanel but first of all I don't get to see localhost in the physical servers list and then if I try to add a new physical server I need some kind of auth key to add it. ...
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1answer
11 views

How to prevent openvz container from adding another ip address?

How to prevent openvz container from adding another ip address ? I'm using VETH Container. I used this command to configure the network : vzctl set xxx --save --netif_add ethx,,,FE:FF:FF:FF:FF:FF
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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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46 views

OpenVZ container(s) and NAT

I have been trying to days to solve my NAT issue with OpenVZ. I have used their guide on their website/wiki, however I just seem to be unable to get it to work. My Linux box is running on CentOS 6 ...
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1answer
41 views

HA Cluster with OpenVZ and DRBD

I would like to create an HA Cluster using OpenVZ and DRBD. I found this tutorial http://www.olindata.com/blog/2013/12/building-ha-cluster-openvz-drbd-heartbeat-and-pacemaker and I got as far as Step ...
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159 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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56 views

RAM usage by Apache server in Wordpress Site

I need some advice as I have a VPS OpenVZ with 1GB Ram and 1GB burstable. I am running a site on wordpress and my site users are about 2000 per day. My DB size is about 90MB and I am using latest ...
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1answer
74 views

OpenVZ - SMTP - telnet - Connection timed out

I have problem with SMTP in my OpenVZ container. I've created OpenVZ container by Proxmox on dedicated server in OVH. This container will be as mail server. So I create on "mother-server" rules to ...
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40 views

Why does an OpenVZ host show processes running in a container?

My OpenVZ (debian) host environment has only the minimal packages installed. Now I was irritated to see a mysqld process in top when the mysql package is installed and running only in one container. ...
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49 views

How to limit bandwidth from inside OpenVZ container without tc?

As the title says I would like to know if it is possible to limit bandwidth (download and upload) of OpenVZ container (from inside it) without use of tc or any additional kernel driver (VPS provider ...
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412 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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86 views

Setting up veth in proxmox

I have recently taken over an openvz stack from an admin that left, and I am having problems with veth interfaces. There are 3 CTs using the bridge vmbr0 in the stack, with their own public IP ...
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122 views

Trunk vlans inside openvz container (Proxmox)

I have a node running OpenVZ CT (ProxMox). eth1 on HN are bridged through vmbr1 to veth device on CT101 (eth1 inside container). (Host Node) eth1 -> vmbr1 <- veth101.1 <- eth1 (CT101) No ...
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36 views

how to create virtual private server in openVZ with two physical interfaces

I have couple of queries What are the possible ways to create a virtual private server with two physical interfaces(eth0 and eth1) in openVZ? if not how it should be achieved ? vzctl set 101 ...
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521 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 ...
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1answer
55 views

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

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
62 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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41 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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3k 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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24 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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208 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
24 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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102 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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411 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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305 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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130 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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28 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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47 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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131 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
103 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
750 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
822 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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130 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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78 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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548 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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13k 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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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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347 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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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 ...