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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365 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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0answers
534 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 ...
0
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1answer
80 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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2answers
259 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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3answers
54 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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2answers
452 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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1answer
633 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 ...
0
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1answer
129 views

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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138 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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0answers
354 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 ...
0
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1answer
35 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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1answer
196 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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1answer
147 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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3answers
1k 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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1answer
190 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 ...
0
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1answer
545 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 ...
0
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2answers
886 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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1answer
150 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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2answers
366 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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2answers
642 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 ...
0
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1answer
84 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 ...
1
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1answer
97 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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2answers
120 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 ...
0
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1answer
169 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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4answers
10k 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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85 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 ...
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1answer
105 views

yum update MemoryError 1G memory free

I am trying to do yum update and getting "MemoryError". The server (OpenVZ box) has 2G RAM and Percona MySQL server running with 1G InnoDB buffer configured. The OS is CentOS 6.5, kernel ...
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1answer
350 views

Unable to get OpenVPN working on Ubuntu on an OpenVZ VPS

I have TUN/TAP enabled server.conf port 1194 proto udp dev tun ca ca.crt cert server.crt key server.key dh dh1024.pem server 10.8.0.0 255.255.255.0 ifconfig-pool-persist ipp.txt push ...
0
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1answer
272 views

Why does installing vzctl on a fresh Centos6.5-minimal break network connectivity?

I seem to have encountered a bug in vzctl's installation. Upon installing it in a clean CentOS6.5-minimal installation according to the official wiki, network connectivity is limited to pinging IP ...
0
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1answer
98 views

Logging connections on a port of a openvz container by iptables

I'm trying to log the connections that are made on the container with the IP x.x.x.x I'm sending an email using postfix by the mail command but I don't see any logs. Here is my configuration: ...
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0answers
95 views

openvz tar implausibly old time stamp

I'm trying to restore a 26 G tar dumpo of an openvz container. The problem is, that when untarring this error comes up: implausibly old time stamp 1969-12-31 18:00:00 and the it doesn't finish the ...
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4answers
3k views

“Warning: hostname localhost does not resolve to address ::1: No address associated with hostname” inside an openVZ/Debian container

I'm getting the mesage regulary inside mail.log from postfix. In special, but not only, at mails send received mailman. warning: hostname localhost does not resolve to address ::1: No address ...
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1answer
80 views

how much openvz burstable memory can be used

I want to buy a VPS having openvz virtualization. Now the applications that i m currently hosting( glassfish, mysql, mail) requires around 600~800 MB of RAM. Would I be able to run my applications ...
0
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1answer
655 views

Modifications to sysctl.conf in openVZ container, do they even take effect?

I'm following a security guide(http://www.thefanclub.co.za/how-to/how-secure-ubuntu-1204-lts-server-part-1-basics) to strengthen my OpenVZ based VPS webserver running Ubuntu 12.04 , a part of that ...
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1answer
1k views

“kernel: Cannot read proc file system: 1 - Operation not permitted” — millions of such messages each minute in kern.log on OpenVZ VPS? [closed]

I'm seeing repeated never ending such messages in kern.log on my OpenVZ ubuntu 12.04 server. Mar 2 06:23:33 localhost kernel: Cannot read proc file system: 1 - Operation not permitted. Mar 2 ...
0
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3answers
120 views

Should I get extra IPs?

This is my proposed setup using OpenVZ containers (hosted on Proxmox): CT 1: MySQL and nginx. Hosts all databases and multiple websites(domains). Used ports are 80, 443, 3306, 8080 CT 2, 3, 4: These ...
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1answer
67 views

No buffers in memory. What it means?

This is a memory stats from my VPS (OpenVZ). $ free -m total used free shared buffers cached Mem: 800 405 394 0 0 405 -/+ ...
1
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4answers
866 views

Heavy production MySQL/Percona Database in openvz container

So I'm currently running a MySQL 5.1 database, with the following specs: Proc: Intel(R) Xeon(R) CPU E5-1620 0 @ 3.60GHz RAM: 64 Go disks: 2x 100 Go SSD (RaidSoft) I'm planning to migrate my ...
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0answers
133 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, ...
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0answers
132 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 ...
1
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1answer
58 views

Certificate issues at OpenVZ Ubuntu containers

today I came up with the problem that certificates cannot be verified on my openvz ubuntu containers. I checked the /etc/ssl/certs folder which is readable and seems to be ok. However, when I try to ...
0
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3answers
169 views

Remote access forbidden (HY000) to specific mysql client

A MySQL server is located at central.hwcharts.com; it is the master of a basic master-slave replication which replicates toward host0.hwcharts.com, located on a different physical machine which ...
0
votes
1answer
834 views

Why is OpenVZ less secure than KVM and XEN [closed]

I've read many forums and blogs and articles comparing OpenVZ, KVM and XEN. And I have seen many times that one of the negatives of OpenVZ is that its less secure. However, I have yet to see an ...
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2answers
74 views

How does vzdump treats hard links pointing out of the virtual machine?

I have an OpenVZ container containing some hard links pointing to the host file system. For example, I have run on the host ln /root/file /var/lib/vz/private/101/root/link Now I'm asking myself: if ...
2
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0answers
331 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
75 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
votes
1answer
84 views

Why is a remote IP redirecting to a local server?

I've got a rack full of Linux servers that host OpenVZ containers and for some reason when I attempt to connect to a certain remote IP from inside a few of the OpenVZ containers (using telnet, for ...
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0answers
98 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 ...
0
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1answer
90 views

OpenVZ sharing PHP5-FPM socket

I need a problem with sharing php5-fpm.sock between 2 vz containers I have 2 containers: 1. with NGINX 2. with PHP5 and PHP5-FPM Link containers over NFS I tried using: 1. mount --bind ...
0
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1answer
129 views

openvz / centos 6 vps yum failing with error

Installed new openvz container with centos 6.4 64bit Resolving Dependencies --> Running transaction check ---> Package kernel.x86_64 0:2.6.32-431.el6 will be installed --> Processing ...