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Home » General » Support » Moving containers from CentOS 5 to CentOS 6(Can a OpenVZ container be moved from a different machine to another, with a different version of CentOS?)
icon5.gif  Moving containers from CentOS 5 to CentOS 6 [message #47565] Thu, 16 August 2012 06:51 Go to next message
Razva is currently offline Razva
Messages: 9
Registered: September 2011
Junior Member
 From: *rdsnet.ro
Hello,

I have a bunch of virtual machines, based on OpenVZ (+SolusVM), which I want to move on another physical machine/node.

Obviously I would like to install CentOS 6 on the new node, for various reasons.

So here's the question: can I move the OpenVZ containers from a CentOS 5.8 machine to a CentOS 6.3 machine?

Thanks!

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Re: Moving containers from CentOS 5 to CentOS 6 [message #47575 is a reply to message #47565] Thu, 16 August 2012 13:46 Go to previous messageGo to next message
Paparaciz is currently offline Paparaciz
Messages: 94
Registered: August 2009
Member
 From: 78.56.145*
Yes you can,
but I recommend do offline migration

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Re: Moving containers from CentOS 5 to CentOS 6 [message #47576 is a reply to message #47575] Thu, 16 August 2012 13:58 Go to previous messageGo to next message
Razva is currently offline Razva
Messages: 9
Registered: September 2011
Junior Member
 From: *cablelink.mures.rdsnet.ro
Ok, thanks for your reply!

Second question: will migrating a container from a 5.8 node to a 6.3 node upgrade the container itself? Or will the containers keep the same OS version, despite having a different host/node version?

Thanks!

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Re: Moving containers from CentOS 5 to CentOS 6 [message #47578 is a reply to message #47565] Thu, 16 August 2012 14:37 Go to previous messageGo to next message
Ales is currently offline Ales
Messages: 225
Registered: May 2009
Senior Member
 From: *dynamic.sbb.rs
Of course it won't update the containers. Nothing within your containers will change.

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Re: Moving containers from CentOS 5 to CentOS 6 [message #47580 is a reply to message #47576] Thu, 16 August 2012 18:32 Go to previous message
mustardman is currently offline mustardman
Messages: 85
Registered: October 2009
Member
 From: 184.71.122*
Razva wrote on Thu, 16 August 2012 13:58
Ok, thanks for your reply!

Second question: will migrating a container from a 5.8 node to a 6.3 node upgrade the container itself? Or will the containers keep the same OS version, despite having a different host/node version?

Thanks!


I've moved containers from CE5 to CE6 nodes many times. Never had a problem. I used vzmigrate with default settings.
http://wiki.openvz.org/Migration_from_one_HN_to_another

It copies over live then shuts down the container and rsyncs any changes that may have occurred during the live migration. Works great.

As the previous poster stated, nothing with the container changes so you may have to edit the /etc/vz/CTID file to updated the IP if it's a different subnet, name servers if they are different, and also change the memory parameters from beancounter to vswap. Just use the included vswap template file which is found in the same directory to get those settings.

[Updated on: Thu, 16 August 2012 18:34]

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