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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17 views
NFS mount failing in OpenVZ container but working in Ubuntu
I am running a debian 6.0 open VZ container and can't get my NFS share to mount. The error I am getting is mount.nfs: mount to NFS server '' failed: timed out, giving up
However, using the same exact ...
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1answer
32 views
recipient rejected in a SMTP connection from a OpenVz container [closed]
I'm facing a strange problem. I'm getting a recipient rejected on a SMTP server only from inside an OpenVZ container, while from the physical server everything works fine.
Here's an example of a ...
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1answer
25 views
Proxmox 2.3 don't use mount script
I am running proxmox 2.3
Since I installed proxmox on a new server I definitely can't use mount and unmount script on a container and I don't know why. Proxmox just doesn't read those scripts.
Here ...
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1answer
24 views
OpenVZ Host Node and IPTables
Can you use IPTables on the host node or does that effect all the containers on the node?
I am unsure as to if using iptables will effect all the containers below or not.
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21 views
Deploying OpenVZ containers
I have already installed OVZ web panel.My current situation is
1.In the LAN i m working from,the hardware node(HN) on which OpenVZ is installed has ip address 192.168.2.152.
2.three containers have ...
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1answer
27 views
What is the 'optimal' Postfix configuration to reduce overall system load? [closed]
We currently process >10k messages per day, and Postfix gets bogged down which results in slow delivery to local user, so I looked at older examples of how Postfix can fend off many spam senders, such ...
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1answer
33 views
OpenVZ - Ubuntu 12.04 unable to enter
I've setup an Ubuntu 12.04 on OpenVZ, it's been created and appears to start up fine. When I try to enter the OS it just hangs.
I've ran ps aux with the exec and it returns:
USER PID %CPU %MEM ...
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24 views
How to assign each user in a LAN a dedicated container?
I currently have OpenVZ installed on CentOS 6.3 in a LAN with the host node ip address being 192.168.2.152.How do I assign other users in the LAN a dedicated container of their own so that their ...
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1answer
38 views
Find ddos attack on OpenVZ container
How do you figure out which OpenVZ contain is under attack from a dDoS?
I know it is an attack because the b/w and incoming traffic shot WAY up.
Can this be done with netstat? Are some attacks not ...
1
vote
1answer
31 views
Firewall blocking ssh out from a openVz container
I'm using a firewall on the HN to open/close the ports of the containers directly from the HN. I'm using the iptables script from the openvz wiki.
Everything works fine but I cannot ssh out from the ...
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2answers
51 views
How to over 500000 cpuunits on OpenVZ [closed]
I have a OpenVZ and i would like to allocate more than 500000 cpu units.
But the max i can set is 500000.
Does he have a solution to give more power to my vm?
According to all the sources I read ...
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73 views
IPv6 only works after pinging the default gateway (Centos)
We have a lot of nodes with CentOS 6 + OpenVZ (solusvm slave) with IPv6 working inside the containers without any problems. Now we installed new CentOS 6 + OpenVZ (solusvm slave) slave node server ...
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1answer
48 views
Find IP addresses with most connections on system
I am currently experiencing some attacks on my OpenVZ server (CentOS 6.3 64bit), which is saturating the public ethernet interface (currently accessing SSH via the private interface).
Is it possible ...
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0answers
13 views
OpenVZ :: Ubuntu 64 Iptables: can't initialize iptables table `nat' [duplicate]
I just got a new VPS running Ubuntu 64 bit.
I am trying to start IPtables with the following as the rules:
iptables --flush
# nat
iptables -t nat -A POSTROUTING -s 10.8.0.0/24 -o venet0 -j SNAT --to ...
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52 views
How to fix inode errors and issues - CentOS
My server is keep crashing. It happens randomly every few days tough.
Today it happened while I was logged in trough SSH and it said:
Message from syslogd@ at Mon Apr 15 14:43:42 2013 ...
ns213921 ...
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1answer
73 views
SolusVM + OpenVZ + Second level quotas — how to enable?
I have a lot of CPanel clients and I've seen some host automatically enable secondary level quotas on signup. I was wondering how do I do that?
Do I need to run a script on signup?
Do I need to edit ...
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1answer
91 views
Puppet provider does not install prerequisites
I have cloned a module for virtual machines, but when I try to apply a virtual machine to a node, I get Error: Could not find a suitable provider for virt, which is understandable given that the ...
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1answer
121 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
22 views
Can you make the /vz directory a symlink?
I have a OpenVZ VPS server with a 500GB hard drive and 240GB SSD. I'd like to have each VM's files stored on the SSD. Can I make their directory within /vz symlink to a directory on the SSD?
There ...
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0answers
12 views
How to access the website hosted on the host server from a container in OpenVZ
I have a joomla website installed on the OpenVZ host(192.168.2.152).How do I enable different containers to access this website.Or how do I make an instance of this web server available on each ...
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0answers
40 views
LSI and CacheCade Optimisation
I'm just testing a testing a OpenVZ server with following HDD setup:
LSI9260-8i+BBU
6 x 2TB WD RE4
2x 120GB Intel 520 SSD - CacheCade
CacheCade VD:
RAID Level : Primary-1, Secondary-0
State ...
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1answer
18 views
Are there any rules as to how IP address should be assigned to each container in OpenVZ?
I have OpenVZ running on CentOS system connected to a LAN.The internal IP address of the host machine is 192.168.2.152.Two containers have been created and the IP addresses I assigned are
...
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2answers
196 views
Issue on yum update with kernel
--> Running transaction check
---> Package e2fsprogs-resize2fs-static.x86_64 0:1.42.3-3.el6.1.ovz will be installed
---> Package kernel.x86_64 0:2.6.32-358.2.1.el6 will be installed
--> ...
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55 views
How do you do IP Nullrouting
If an IP on a KVM, or OpenVZ or XEN container gets a DDoS on a VPS node, how do you nullroute that IP?
Can it be done on the host node or must you contact the data center?
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41 views
Enabling Secondary level quotas on OpenVZ [closed]
I've looked into trying to figure out how to Enabling Secondary level quotas on OpenVZ for CPanel and so far all I have found is http://docs.cpanel.net/twiki/bin/view/11_36/WHMDocs/VirtuozzoQuotas
...
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1answer
72 views
Parallels Apache stopped loading virtual host config files?
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
59 views
Infrastructure design recommendations for a simple proxmox setup
I am aware of the dangers of this question being non-constructive so bear in mind I did my best to narrow the possible answers I get.
I am swapping an old dedicated Gentoo server for a new one, and ...
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0answers
27 views
Network Isolation with OpenVZ [closed]
I have been researching this for over a week now.
What I am trying to do:
I am creating a cloud using OpenVZ containers. I am trying to isolate
each tenant to their own "zone". Meaning, each ...
1
vote
2answers
129 views
How to increase Free PE in LVM physical volume?
I use Proxmox 2.2 for making OpenVZ containers.
It ships with a tool called vzdump that can create backups of OpenVZ containers on the fly. It uses snapshot functionality of LVM to create temporary ...
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1answer
45 views
`fuse`-like mounts on linux-vserver/openVZ?
I don't know much about servers or virtualization. However, for the last years, I've been using a rented linux-vserver as my backup drive and for recording radio shows through cronjobs.
I ran out of ...
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1answer
45 views
How do you enter the console of a openvz container from the host?
I lost the password for my OpenVZ container(actually I was using private key ssh but lost the file, so after setup I never logged in with root password) but I still have root access on the host ...
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1answer
112 views
CentOS OpenVZ kernel panic when mounting ext4 truecrypt volume in nokernelcrypto mode
I am experiencing kernel panic when trying to mount a ext4 filesystem which itself resides on a truecrypt volume mounted using -m nokernelcrypto option.
The system is CentOS 6.3, OpenVZ Kernel ...
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3answers
88 views
Is there any server virtualization software supports subdomains? [closed]
I installed openvz in my server but to create more virtual machines I need more than one ip address. But my service provider can only give one ip address for my server. Is there any software that ...
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0answers
412 views
Deciding between AMD Opteron 6300 16 core build vs Xeon E5-2600 build for virtualization host [closed]
I'm looking into building a lower cost (ish) virtualization server that will run OpenVZ and be used primarily for large gcc compiles (compiling scales well with added jobs), and I'm considering ...
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1answer
74 views
How can Apache be installed in a OpenVZ container
I have OPenVZ running on CentOS and a precreated Ubuntu 10.04 OS template installed.The containers created have 2GB of disk space allocated.With this,can I have an Apache web server running within a ...
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1answer
21 views
apt-get authentication error in OpenVZ Debian container
Whenever I receive upgraded packages from security.debian.org, I get the following error:
WARNING: The following packages cannot be authenticated!
apache2 apache2-mpm-prefork apache2.2-common ...
...
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0answers
35 views
OpenVZ exec and unable to re-open stdin / Unable to lock the administration directory
I run the following command across all OpenVZ containers to update/upgrade:
vzctl exec2 $VM "apt-get update & apt-get upgrade"
In all cases, I get the following error:
dpkg-preconfigure: ...
1
vote
1answer
200 views
Identifying performance bottleneck on a high-end VPS (Apache 2.4 event_mpm/lighttpd/nginx)
I have quite a high-end VPS from vpsblast (their SSD13) - 4 cores, 16gb RAM, 320gb of SSD hard drive space on a 1GigE Internet backbone (virtually uncontested). As near as I can tell it is running ...
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1answer
81 views
OpenVZ with VSwap causes php-fpm/mySQL errors on nginx
I'm running into a rather nasty issue, and hope that anyone here can help me with a possible solution as I'm pretty much brickwalling right now.
The situation:
I have an OpenVZ VPS that is ...
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1answer
54 views
OpenVZ - vzdev kernel module issue
I am setting up a Centos 6.3 minimal server with openvz that replicates to another machine using DRBD.
I want all openvz data/files to be kept in a single /vz directory which is an LVM that I am ...
2
votes
0answers
88 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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58 views
openvz mounting
Is there a correct way to do this?
One way I've seen is
tmpfs /dev/shm tmpfs noexec,nosuid 0 0
tmpfs /tmp tmpfs noexec,nosuid 0 0
tmpfs /var/tmp tmpfs noexec,nosuid 0 0
another is
mkdir /root/tmp
...
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1answer
217 views
Centos 6.3 DRBD / OpenVZ kernel/userland issue
When I start my Centos 6.3 server's drbd service I get the following error:
Starting DRBD resources: DRBD module version: 8.3.13
userland version: 8.4.2
preferably kernel and userland versions ...
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0answers
37 views
OpenVZ container stuck in suspend
I have an issue with vzdump --suspend. I end up with a container stuck in suspend, and I cannot enter or stop it. Do any you know how to force the container to stop, without having to restart the HN?
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0answers
97 views
Installing Kernel for OpenVZ Centos
Can I install this kernel https://centos.mirror.netriplex.com/openvz/kernel/branches/2.6.27/2.6.27-repin.1/
on my Centos 5.9 server without any issues?
I really need something higher than my 2.8.18. ...
1
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1answer
159 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 ...
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1answer
186 views
Proxmox server with just one public IP
Is it possible to host a proxmox server with openvz containers NATed to the public IP which hosts the Proxmox server ?
I have gone through the proxmox feature list but I am somehow puzzled by the ...
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126 views
Server not resolving external addresses OpenVZ VPS
We are having an issue when we run a creation script that we made for OpenVZ, this script used to work all fine however a few days ag we started having issues with it, this started when we deleted a ...
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1answer
146 views
GRUB can't configure on upgraded Ubuntu OpenVZ VPS
I upgraded an OpenVZ VPS from an older Ubuntu release to 12.04LTS using the do-release-upgrade command. Ever since, all of my apt-get runs look something like this:
$ sudo apt-get upgrade
Reading ...
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1answer
63 views
openvz dual nic setup from scratch
I have a openvz server that has 2 nics I need 1 for ethernet and the other explisitly for nfs traffic.
eth0 goes to the lan/internet currently doesnt have ipv6 but will be getting a static ip soon.
...
