Questions tagged [openvz]

OpenVZ is an open source containerisation 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 virtualization technologies.

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9
votes
2answers
14k views

Apache reaching MaxClients and locking the server

I currently have an Apache2 server running with mpm-prefork and mod_php on a OpenVZ VPS with 512M real / 1024M burstable RAM (no swap). After running some tests, I found that the maximum process size ...
7
votes
1answer
2k views

Changing time or offsetting it in OpenVZ contained server

I am trying to run a VPS, a Debian box contained in an OpenVZ container. Obviously, I cannot use time --set or any such command, as the time must be set via the parent node. The owner of the parent ...
14
votes
4answers
44k 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 ...
5
votes
1answer
10k views

Why is Linux choosing the wrong source ip address

and what to do to let it choose the right one? This all happens inside an OpenVZ container: The Host is Debian/Wheezy with Redhat/OpenVZ Kernel: root@mycl2:~# uname -a Linux mycl2 2.6.32-openvz-...
3
votes
2answers
4k views

Iptables port forwarding on OpenVZ CEntOS container

I am trying to setup a simple port forwarding on an OpenVZ container that is running CentOS 5.5. When I run a command I get errors. iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-...
3
votes
2answers
859 views

apparmor not working ubuntu 11.04 insize OpenVZ

so it seems I have everything installed, but apparmor_status gives "apparmor module is not loaded." Also some apparmor scripts check for presence of /sys/module/apparmor and it is not there... Any ...
3
votes
2answers
9k views

OpenVZ: share a folder between containers

I want to share a directory from an OpenVZ container to another container, how I could do that? do a symlink from /vz/private/109/common-stuff to /vz/private/108/common-stuff ? bind mount /vz/private/...
24
votes
3answers
85k views

CentOS 7 firewall-cmd not found

I have just installed CentOS 7: [root@new ~]# cat /etc/redhat-release CentOS Linux release 7.1.1503 (Core) I am trying to configure the firewall, and I'm told that in CentOS 7 iptables is no longer ...
4
votes
3answers
3k views

Java VM problem in OpenVZ

I bought a vps for hosting my java needs. But I can't run java on it. Everything about java is correctly installed but when I try to run java ("java -version" forexample) I get this error : Error ...
8
votes
8answers
2k views

Which virtualization platforms should I choose, Xen or OpenVZ? [closed]

I am upgrading my shared hosting to VPS hosting, mainly to just add server administration skills to my development skills, so I'm facing a lot of new choices just signing up. I need to choose a ...
2
votes
2answers
3k views

how to drop_caches in OpenVZ centos6 container

I have tried sudo sh -c 'echo 3 > /proc/sys/vm/drop_caches' sudo echo 3 > /proc/sys/vm/drop_caches echo 3 > /proc/sys/vm/drop_caches echo 3 | sudo tee /proc/sys/vm/drop_caches and a ...
1
vote
4answers
1k views

OpenVZ Host is the source IP address rather than actual web surfers?

I am experiencing something a little bit odd. I'm running OpenZV on a CentOS 5 server. It appears that on containers the source IP address that say Apache webserver sees a request from is the OpenVZ ...
4
votes
4answers
6k views

PHP unable to allocate memory

On my way to the office this morning, every website on our shared VPS started giving the same error (several times, not the typical memory_limit error which is fatal): Warning: Unknown: Unable to ...
2
votes
1answer
1k views

openvz and iptables

http://wiki.openvz.org/Setting_up_an_iptables_firewall mentions to load xt_state before starting a container in order to run iptables in containers. so I ran modprobe xt_state on the host and ...
2
votes
2answers
11k 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 "...
1
vote
4answers
599 views

OpenVZ Host is the source IP address rather than actual web surfers?

I have a problem with my VPS. Simple example: <?php $ip = $_SERVER['REMOTE_ADDR']; Echo "User IP : " . $ip; ?> That code should display the user IP address, but it's showing the HN IP ...
1
vote
2answers
731 views

Server mysteriously rebooting

I have a VPS that almost daily performs a reboot. I finally managed today to get a clue from my logs May 12 03:14:49 sshd[19379]: Did not receive identification string from 173.212.118.167 May 12 ...
1
vote
1answer
1k views

OpenVPN routing for OpenVZ containers

I am trying to make OpenVPN tunnel accessible for all OVZ CT's running on the host. I have initialized the tunnel devise on the host server to remote VPN server. Although I have PING response from the ...
0
votes
1answer
402 views

How do I add eth0 on centos 5 that is using openvz

I have a vps account with CentOS 5 installed. It uses OpenVZ for virtualization. Now I'm trying to install pptp service (using this guide) on it. I'm currently on Step 6 but I don't see any eth0 ...
0
votes
1answer
339 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 ...
0
votes
1answer
926 views

OpenVZ kernel panic

I recently installed OpenVZ on my VMWare box (To do some testing) and I get the following: https://www.dropbox.com/s/p38btkv5j84bvsh/Capture.JPG the GRUB config is as follows: # grub.conf generated ...
0
votes
1answer
1k views

How to see what is causing failcnt on tcpsndbuf

I am seeing a failcnt on my tcpsndbuf by looking at the user beancounters. How am I able to see what is causing this failcnt? I am experiencing problems with my server and I think that it is as a ...