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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Openvz vs OpenVZ within SolusVM
is there a difference from a VPS user point of view between regular OpenVZ and OpenVZ from within SolusVM ?
My understanding was that OpenVZ doesn't have the overhead of a true hypervisor and then it ...
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Debian 9 automated install (OpenVZ) hangs on two different dialog screens
After redoing the installation by hand, I have more information, so therefor I am editing my post completely so it's better readable and hopefully someone can provide a workable solution or workaround ...
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how to read ram usage from new versions of free and htop?
before I switched to Ubuntu 16.04 64bit server on my VSPes (based on OpenVZ), I used to read the output from free and htop to analyze the actual RAM usage. Now with 16.04 that comes with the new free ...
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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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How do I kill a specific service on a specific container in Openvz?
I want to kill a specific service in a specific container in an Openvz Server.
In this case, I want to kill every service using port X on Container A.
Could you please let me know which command I ...
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NVMe-Dedicated Server without Virtualisation: Big speed benefit? [closed]
I am currently using a VPS which is virtualised with Virtuozzo and sometimes my blog is starting to deliver in 150ms till 350ms (server response).
I assume that the virtualisation is the bottle neck ...
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Memory bandwidth in OpenVZ container
What determines memory speed of OpenVZ container?
I've run sysbench --test=memory --memory-block-size=1M --memory-total-size=1G run on several OpenVZ powered VPSs from different providers and observed ...
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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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How to route ipv6 to an openvz container?
My hosting provider, OVH, offers me a /64 ipv6 block.
I'm pretty new to ipv6 and a bit of a newbie in networking in general.
I was able to route an ipv6 on my proxmox server by properly configuring ...
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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 ...
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OpenVZ Questions
I want to create a brand new node and have a few questions:
OS Templates:
http://wiki.openvz.org/Download/template/precreated
Is the "suse" in the first section under "List of templates available at ...
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Open VZ firewall solutions
I've got VPS running on an Open VZ virtualisation instance. Unfortunately I'm having a lot of trouble getting a firewall up and running. I've tried my usual UFW and shorewall, but neither of them ...
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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: http://blog....
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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 I ...
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NFS server not serving share after reboot
I have two Linode containers. Box A is our general purpose web server. It occasionally needs to access Box B, which is set up as an NFS server.
When Box B reboots, Box A is unable to access any NFS ...
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What kind of trouble will it cause to run an older kernel?
I started to try to get acquainted with openvz.
Following the instructions here I installed my first ever openvz server on centos 6.
The first container I spawned was based on the ubuntu-16.04-...
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Unable to connect to services bound to 127.0.0.1
I have a Debian wheezy server running a few web applications, a MongoDB database and a Redis server behind a NGinx server. Only the NGinx server is public facing and the other services are reverse ...
CommunityBot
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fdisk -l return cannot open /proc/partitions
I have a Debian server with 4.5Go on the /dev/simfs partition.
Filesystem Size Used Avail Use% Mounted on
/dev/simfs 4.5G 3.2G 1.3G 72% /
tmpfs 474M 76K 474M 1% /run
...
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SolusVM Migration
I have an old server on which I am hosting about 30 OpenVZ VPS Servers. I have purchased a new server which is much more powerful and I plan to do a complete migration in the future. Currently I would ...
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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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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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OpenVZ Reboot failed for Ubuntu 12.04 32bit container
The container on OpenVZ server was setup using the template Ubuntu 12.04 32 bit and it was successful.The container fails to load when reboot operation is preformed.Re-installation of the container ...
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VPS (Virtual Private Server) kills JVM process when exceeds guaranteed RAM [closed]
VPS:
Operating system: Ubuntu
Guaranteed RAM: 10g
Burst or Dynamic RAM: 20g
When exactly a VPS ( Virtual Private Server) kills the process when dedicated memory limit exceeds?
And which process gets ...
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How to create a LXC container on LVM from an OpenVZ template?
I have a lot of experience using OpenVZ, but I want to give LXC a try on a server where perfect isolation is not a concern. The main reason for the switch is preferring Ubuntu Server LTS as the base ...
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How do I migrate Proxmox 3.x openVZ containers to Proxmox 4.x LXC?
I have just upgraded one of the Proxmox machines in a cluster from 3.4 to 4.2 following these instructions.
Normal VMs have migrated correctly. We had to change hard drives from virtio to ide so that ...
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Moving from shared cpanel hosting to non cpanel VPS - What should I know?
I'm currently looking into migrating a few sites from my shared cpanel hosting to a VPS. Got to the point where I want to do more and have been learning about some system admin stuff through my ...
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Elasticsearch high RSS memory consumption
I am seeing too high memory consumption in my elasticsearch instance.
I set ES_HEAP_SIZE=4g.
The starting command for ES starts with:
/usr/lib/jvm/java-8-oracle/jre/bin/java -Xms4g -Xmx4g
So far so ...
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Back up rented VPS that does not have that option
I'm currently renting a linux VPS from a host that doesn't grant the option to create a backup or snapshot. In my previous experiences with other hosts most of them had the ability to do so.
And for ...
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Connecting two OpenVZ internal networks so containers can see each other
I have two OpenVZ Hosts with containers on them. This is the current layout:
Host-A: (eth0 (connected to internet), eth1 (connected to Host-B))
Host-B: (eth0 (connected to internet), eth1 (connected ...
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Upgrading Debian Squeeze with OpenVZ to Debian 7/8 with LXC
I have a few servers which are running Debian 6 (Squeeze) which uses OpenVZ to run containers. The containers are some Debian 6 and some Debian 7.
Squeeze was the last version of Debian to support ...
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How to login as root in vps from main server (Dedicated)
how to login as root in VPS from root main server without changing the existing root password?
I have Dedicated server and use virtualizor OpenVZ for make it available for to build vps, but one of my ...
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German Umlauts (but only uppercase) are broken
I have a proxmox3 server. I login via SSH. Umlauts (öäüÜÖÄ) works well - nevertheless if upper or lowercase.
Then I login in my openvz node (debian wheezy) via:
vzctl enter 100
In this node,
on ...
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How to find the missing inodes?
df -i reports
Filesystem Inodes IUsed IFree IUse% Mounted on
/dev/simfs 300000 250697 49303 84% /
so around 250K inodes in use.
du -shx --inodes / reports 70K
to be sure no inodes was ...
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Can i do command "service network restart" on dedicated server?
If i do "service network restart" Linux command on my OpenVZ VPS host server (dedicated server where are virtual machines - VPSs hosted), how this can impact virtual machines? Can i loose SSH ...
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OpenVZ containers will not start after a reboot
vzctl start 192
Dump file /vz/dump/Dump.192 exists, trying to restore from it
Restoring container ...
Opening delta /vz/private/192/root.hdd/root.hdd
Data cluster 1112 beyond EOF, vsec=47137...
FATAL
...
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can't initialize iptables table `nat' in Proxmox Openvz vm
When I tried to run an iptables command in the Proxmox OpenVZ vm, I got the following error:
# iptables -t nat -A POSTROUTING -o venet -j MASQUERADE && iptables-save
iptables v1.4.21: can't ...
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OpenVZ MySQL InnoDB won't start
I have a OpenVZ Server with 4GB RAM and have tried to install MySQL on several distros (Ubuntu 12.04 64Bit, Ubuntu 12.10 64Bit, Debian 7 64Bit) and I always get the same errors:
130718 6:57:27 [...
CommunityBot
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LXC containers on a OpenVZ VPS
I am trying to run LXC on a VPN that is hosted in OpenVZ, I have tried doing this with multiple image flavours, ubuntu. centos, debian... with no luck.
LXC installs correctly but containers fail to ...
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SSD caching using bcache or dm-cache on kernel 2.6.32-042stab104.1
I'm looking to use bcache or dm-cache with the latest OpenVZ kernel (2.6.32-042stab104.1) on CentOS 6. Unfortunately, dm-cache and bcache are part of kernel 3.10, but I know the OpenVZ kernel has a ...
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OpenVZ Container cannot access internet
I have Daedicated Server, and I want to split it on two virtual servers with two diffrent IP Adresses. I bought two exetrnal IP adresses for this server and now I have three, one Main Address, one for ...
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Iptables stuck in D state all the time and causing server load
I am running iptables/csf on a centos 5.11 openvz vps.
I can't start/stop/flush iptables/csf.
Further looking into it I could see the csf is waiting for iptables. And iptables is stuck as you can see ...
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Openvz: What exactly does it mean when tcpsndbuf failcnt increases? Why must there be a minimum difference between limit and barrier?
When the failcnt of tcpsndbuf increases, what does this mean? Does it mean the system had to go past the barrier, or past the limit? Or, maybe, that the system failed to provide enough buffers, either ...
CommunityBot
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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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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 ...
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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 ...
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Stop an unstoppable openvz container
I have an openvz container that is NOT stopping with the standard vz tools. How can I kill it? I tried a VZ destory but that wont work.
Thanks
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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 ...
CommunityBot
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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 /etc/...
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CentOS host, OpenVZ CentOS container with its own IP cannot access internet
I'm running CentOS 6, and I've got OpenVZ installed (installed with this guide). I'm new to virtualization, and I'm just using these containers for my own projects.
I followed all instructions in ...
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ip6tables forward chain filters all ports
Trying the following on a centos 6 node (running openvz kernel)
ip6tables -F
ip6tables -X
ip6tables -P FORWARD DROP
ip6tables -A FORWARD -p tcp -m multiport --dports 21,22,80,443 -j ACCEPT
ip6tables -...
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