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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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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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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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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26 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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39 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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32 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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71 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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39 views

OpenVZ Container Restart

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.
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iptables NAT can't initialise on Debian openvz [duplicate]

So i want to create a nat rule for an openVPN server. After getting trouble with the TAP/TUN Devices, it's finally working i think It's working greate but not routed so useless. Now i have to make a ...
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112 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 ...
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171 views

MySQL 5.6.21 on Debian 7.7 — nice is automatically set to 19 several seconds after starting it up; can't figure out why

I'm running MySQL 5.6.21 on an OpenVZ VPS with Debian 7.7. MySQL is installed from the DotDeb repository (full version number is 5.6.21-1~dotdeb.1). Whenever the MySQL server is started or restarted, ...
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58 views

OpenVZ: shmpages keep increasing

I have an OpenVZ VPS. However the shmpages always increases to the limit in one or two days. My RAM usage is low (233M without cache). I only run nginx, php-fpm, and mariadb on the VPS. I've asked my ...
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140 views

web server on a proxmox container using dns server on proxmox

Some background: I've got a little problem here. I have Promox installed on my primary server on which I've configured manually my DNS server with BIND9 with the domain example.com and works fine ...
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115 views

Disk partition to Virtual Machine / OpenVZ container

I am relatively new to running virtual machines / OpenVZ containers so if I have miss understood something please let me know. I currently have Ubuntu 14.04.1 installed straight to a partition on my ...
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24 views

Share /etc/hosts between root machine and containers

I have a Centos machine with OpenVZ containers. For each container I have an alias in /etc/hosts. I would like to be able to share the /etc/hosts between the root and the containers. Is there a way to ...
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186 views

need to load xt_tcpudp module in Debian 7 Wheezy with OpenVZ kernel. Error: 'could not open'

I followed this guide IPTABLES inside container guide @ openvz.org I'm running Debian 7 Wheezy x64 which was dist-updgrade'd before installing OpenVZ. The container is Debian7 x64 minimal. It's ...
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32 views

Restoring OpenVZ Container Filesystem Backup

I have a server running OpenVZ -- everyday, a full filesystem backup is made to another server. However, there are no VZ container snapshots being made. So, I have a full filesystem backup of ...
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66 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 ...
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51 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, ...
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170 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 ...
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90 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 ...
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68 views

Connecting to OpenVZ Container that uses NAT

lets say i do not have enough IPs to allocate to each container, how would someone connect that container if it has no public address? (using NAT for that container) the address would be private ...
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24 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 ...
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229 views

Cannot stop service (PostgreSQL) in Ubuntu 14.04 minimal OpenVZ

I'm trying to stop PostgreSQL but this results in a weird error about /proc/: root@dw0wanydbpv14fred:~# service postgresql stop * Stopping PostgreSQL 9.3 database server * Error: /proc must be ...
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279 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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52 views

“Can't create table” when having to many partitions

I am currently having a problem I dont understand. Wherever I look it says mySQL (5.5) / InnoDB doesnt have a table limit. I wanted to test the InnoDB compression and was about to create an empty ...
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126 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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48 views

Determine if IPs are backed by VPS

Is there any way to determine if IPs are backed by actual VPSes? For example, a VPS host receives a /22 block of IPs. He puts them on his server and requests more, but you want to verify that each IP ...
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163 views

vSwap vs Burstable RAM for OpenVZ

What is the big difference between vSwap and Burstable RAM? Does vSwap create and cause I/O by using disk? I know SWAP will use the disk so is vSwap the same as swap just virtualized in the ...
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307 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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Is it possible to create loop device in openvz? [closed]

I have openvz vps and as I can see there's no disk device. But I really need to have a disk device there to check one thing. The question is, can I create fake disk device that would be able to work ...
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87 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 ...
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190 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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30 views

OpenVZ Local Network

I recently aquired 7 OpenVZ Virtual Private Servers for a load balanced website. 2 Load Balancers 3 Web Servers + MySQL API Server + MySQL Storage Server 2 Storage Servers (For PHP Sessions and ...
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114 views

OpenVZ: Is it possible to add a new ploop disk to an existing container residing on an OpenVZ host?

I have a container (Virtual Machine) running on an OpenVZ server and I would like to attach another ploop disk to this container. The / mount point of the container is already configured as ploop ...
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108 views

OpenVZ Web panel: no such file to load when add physical server

I'm trying to use on my (testing) lxc server. I've on my server "potager.local": root@potager:~# lxc-list RUNNING FROZEN STOPPED web I've installed OpenVZ Web Panel on it and it ...
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779 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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140 views

Pam-Mysql “Can't initialize threads: error 11”

Inside a Debian OpenVZ container, I have 2 OpenVPN servers (udp on port 53 and tcp on port 443). The authentication is based on Pam-Mysql. Inside my OpenVPN conf file I have: [...] plugin ...
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374 views

Connection tracking not working in a Debian 7 OpenVZ VPS

I have a small VPS instance (used for web hosting) that runs Debian 7, and for a few weeks I have issues with my firewall and connection tracking. I had no issue for months, but without any system ...
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472 views

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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119 views

Taskset not working properly in OpenVZ container

In a Debian OpenVZ container, I'm trying to use taskset to pin a process to a core, but it doesn't work: root@foo:/# taskset -c -p 0 1754 pid 1754's current affinity list: 0-7 pid 1754's new affinity ...
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237 views

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 ...
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180 views

VPS without access to the Internet after reboot

There is a problem with my VPS. I had purged lots of programs using apt-get command and * wildcard among other things to remove many apps at the same time such as sendmail-*. After it the server ...
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429 views

Best type of virtualization when CPU has more threads than cores

I have a 4 cores/8 threads Intel Xeon processor. This is something I tried to particularly ask in SolusVM support, however I haven't got a good reply. I even don't know if they are right: they told me ...
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54 views

Bonnie does not provide speed for Sequential Input / Block

I'm using ProxmoxVE and I would like to run some benchmarks regarding performances of this product. One of these benchmarks is bonnie++ ; it runs very well in a VM (qemu-kvm) but when I run it in a ...
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92 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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90 views

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 ...
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113 views

No remote access to VPS container based on OpenVZ

Is there any chance to start ssh server when sysinit is turned to DEFAULT_RUNLEVEL=1? I have no remote access at the moment to my VPS server (based on OpenVZ container), but I can edit files and ...
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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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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 ...