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Clustered OpenVZ [message #38188] Thu, 26 November 2009 22:10 Go to next message
yourweb is currently offline  yourweb
Messages: 6
Registered: November 2009
Junior Member
Hi
I was wondering about a clustered OpenVZ setup on a SAN how I can transfer the VPS on an other node where the data already exists? Is it possible to transfer the RAM without migrating the data on the hard disks?

Just to explain: I know that the SAN has to be mounted as /vz and that /etc/vz files have to be ln to /vz/etc/vz on the SAN, but what if I want to migrate VPS 1 from node 1 to node 2 without (re)booting?

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Re: Clustered OpenVZ [message #38207 is a reply to message #38188] Fri, 27 November 2009 22:03 Go to previous messageGo to next message
Paparaciz
Messages: 302
Registered: August 2009
Senior Member
you should check vzmigrate script and delete unnecessary parts where it rsync's files. or build your own script reading http://wiki.openvz.org/Checkpointing_and_live_migration
you need only checkpointing and vzctl restore parts. afaik your script will have to rsync checkpoint file to the target and then do vzctl restore.
and from practice i should mention that live migration not always works smoothly.

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Re: Clustered OpenVZ [message #38208 is a reply to message #38207] Fri, 27 November 2009 22:05 Go to previous messageGo to next message
yourweb is currently offline  yourweb
Messages: 6
Registered: November 2009
Junior Member
Paparaciz wrote on Fri, 27 November 2009 17:03
you should check vzmigrate script and delete unnecessary parts where it rsync's files. or build your own script reading http://wiki.openvz.org/Checkpointing_and_live_migration
you need only checkpointing and vzctl restore parts. afaik your script will have to rsync checkpoint file to the target and then do vzctl restore.
and from practice i should mention that live migration not always works smoothly.


I'm sorry, did already found the checkpoint option and posted this in an other topic.

Anyway, how can I disable vzmigrate to copy the files and only transfer the RAM?

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Re: Clustered OpenVZ [message #38209 is a reply to message #38208] Fri, 27 November 2009 22:07 Go to previous messageGo to next message
Paparaciz
Messages: 302
Registered: August 2009
Senior Member
yourweb wrote on Fri, 27 November 2009 17:05

Anyway, how can I disable vzmigrate to copy the files and only transfer the RAM?

vzmigrate is simple bash script Wink
enter your favourite editor with /usr/sbin/vzmigrate

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Re: Clustered OpenVZ [message #38210 is a reply to message #38209] Fri, 27 November 2009 22:09 Go to previous message
yourweb is currently offline  yourweb
Messages: 6
Registered: November 2009
Junior Member
Paparaciz wrote on Fri, 27 November 2009 17:07
yourweb wrote on Fri, 27 November 2009 17:05

Anyway, how can I disable vzmigrate to copy the files and only transfer the RAM?

vzmigrate is simple bash script Wink
enter your favourite editor with /usr/sbin/vzmigrate


Didn't check that, I will probably use some code from this. Thank you for your help!

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