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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1answer
550 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
2k 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 ...
4
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0answers
1k 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
17 views

How are kernel networking settings handled in OpenVZ containers?

I’m a little confused on how containers handle networking. For our normal systems, we’re enforcing things like Disable Source Routed Packet Acceptance, Disable Send Packet Redirects, etc. We usually ...
2
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0answers
131 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 ...
2
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0answers
441 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
89 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
640 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
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0answers
67 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
64 views

aws s3 sync: how to exclude proc, sys directories

I can't seem to get the aws sync s3 command to exclude directories. I am backing up a mounted filesystem from OpenVZ which is located at /vz/root/100. My command is: aws s3 sync /vz/root/100 ...
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378 views

Debian container unable to start after migration from OpenVZ to LXC on Proxmox 4

After migrating a Debian 7 OpenVZ CT from Proxmox 3 to a LXC on Proxmox 4 it does not appear to start correctly. Fristly, migration was done by stopping the container on Proxmox 3, backing up to ...
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0answers
38 views

Can custom /proc mount options be set on OpenVZ containers?

I recently discovered that the way OpenVZ mounts /proc inside of containers by default isn't as secure as it could be (it's mounted as rw). When combined with insecure scripts on the server, this ...
1
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0answers
75 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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0answers
302 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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0answers
100 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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0answers
133 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
585 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
573 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
164 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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0answers
604 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
170 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
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

Using DNAT with IPtables

I am trying to figure out a DNAT issue and I am hoping I can get a hand. Basically I have a OpenVZ box that connects to my LAN via the SoftEther Client. What I am trying to accomplish is a way to ...
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0answers
7 views

configure burst ram for openvz container

Can somebody help me out as to how can we set the burst ram for OpenVZ container using proxmox API. I tried using the following command but with no success: pvesh set /nodes/pve/openvz/{vmid}/config/ ...
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0answers
18 views

Cant set extra option to VPS in proxmox 3.4

I am using Proxmox VE 3.4 to create an openvz container...i was able to create a vz container but i want to know are the advanced option like VNC, ppp, tun tap feature available in proxmox VE on any ...
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0answers
35 views

Identical VMs behave differently

I have 2 Centos 6.7 OpenVZ VPS'. I have copied the entire disk image from the first one (server1) to the second one (server2). Now I have a couple of issues with server1 that I don't have with ...
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0answers
39 views

blocked connection to the ts server under OpenVZ

I have virtual machine with Ubuntu 12.04 under OpenVZ. Teamspeak server v. 3.0.11.4 All ok if i connect from LAN or subnet of my provider. But outside traffic blocked. eth1 - LAN interface of ...
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0answers
18 views

Why does openvz use Vswap when there is guaranteed memory

And does it really matter? I am hosting through nosupportvpshosting.com and have 2 GB guaranteed memory and 2 GB Vswap. I never get near the 2 GB of guaranteed but often have a small amount of Vswap ...
0
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0answers
128 views

GlusterFS can't create volume (error setting extended attributes)

So, I'm running GlusterFS (latest version) on 9 servers, and attempting to create volumes. They're all peers, and all that's okay. They're running in different geographical locations, on different ...
0
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0answers
11 views

tcpsndbuf causing max cpu load (using proxy_mod on openvz)

I do run a web application, which I stripped to the max to avoid a high tcpsndbuf values. Still a failcnt on tcpsndbuf will be reached after a few days and very, very little traffic. I initially ...
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0answers
115 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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0answers
342 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 ...
0
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0answers
60 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 ...
0
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0answers
287 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 ...
0
votes
0answers
1k 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 ...
0
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0answers
41 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 ...
0
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0answers
276 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) ...
0
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0answers
254 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
votes
0answers
98 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
votes
0answers
72 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
votes
0answers
163 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
318 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
183 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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0answers
236 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
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0answers
102 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
votes
0answers
171 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
230 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
votes
0answers
69 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
515 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
145 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 ...