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migrationg VE's from kernel 2.6.8 to 2.6.24-ovz009.1 [message #37596]

Tue, 29 September 2009 09:23

pilpelet
Messages: 25
Registered: October 2006

Junior Member

Hi ,
Im about to migrate few VE's from an old stable 2.6.8 OVZ kernel
to a new server with 2.6.24-ovz009.1 version .
I tested a migration and its working , i didnt test networking and high load but it looks fint now .

I just wants to check few things seens its production havy load VE's befor actualy moves them .

1 - Is the 2.6.24-ovz009.1 fairly stable(its the only version that worked ok with kvm support in it and didnt crash under fedora 7-10) 2.6.27 crashed after reboot .

2 - Will it be possible to migrate the VE's back to the old server 2.6.8 kernel back , i read a post saying that its not possible to migrate to an older kernel , it thru some erorrs in the mogration itself but i havnt checked it so i dont know .

Many thanks ,

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Re: migrationg VE's from kernel 2.6.8 to 2.6.24-ovz009.1 [message #37597 is a reply to message #37596]

Tue, 29 September 2009 09:26

kir
Messages: 1645
Registered: August 2005
Location: Moscow, Russia

Senior Member

Do you mean live migration (i.e. vzmigrate --online)?

Kir Kolyshkin

http://static.openvz.org/userbars/openvz-developer.png

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Re: migrationg VE's from kernel 2.6.8 to 2.6.24-ovz009.1 [message #37598 is a reply to message #37596]

Tue, 29 September 2009 09:34

pilpelet
Messages: 25
Registered: October 2006

Junior Member

Yes , i meant --online
But it doesnt matter if there is another way to do it even if it meens to make some VE's offline for a while then its fine also .

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Re: migrationg VE's from kernel 2.6.8 to 2.6.24-ovz009.1 [message #37599 is a reply to message #37598]

Tue, 29 September 2009 11:11

kir
Messages: 1645
Registered: August 2005
Location: Moscow, Russia

Senior Member

You can always migrate w/o using --offline, that would be stop/migrate/start.

Yes we usually support live migration only from older to newer kernels, but not vise versa -- so live migration from 2.6.24 to 2.6.9 will probably fail.

If you want something newer than 2.6.9 but still stable enough I'd recommend using RHEL5-based kernel (i.e. http://wiki.openvz.org/Download/kernel/rhel5). Nevertheless 2.6.9-based branch is still supported.

Kir Kolyshkin

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Re: migrationg VE's from kernel 2.6.8 to 2.6.24-ovz009.1 [message #37600 is a reply to message #37599]

Tue, 29 September 2009 11:24

pilpelet
Messages: 25
Registered: October 2006

Junior Member

So basicly backup and reload from new to old will work as well ?
Regarding kernel 2.6.24 , i found it well suited to our need in a test small server for now seens we test KVM and openvz on the same host .
Im not sure stable in your opinion is our stable Smile

the HOST is havy loaded but not havy havy loaded (just few VE's)
will this version(2.6.24) will work fine as in no crashes etc..
version 2.6.18 doesnt include KVM moudle build in(only seens 2.6.20) and compiling a new kernel with openvz and kvm is a bit out of the loop right now .

Thanks ,

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Re: migrationg VE's from kernel 2.6.8 to 2.6.24-ovz009.1 [message #37695 is a reply to message #37596]

Sat, 10 October 2009 23:55

sylvester_0
Messages: 4
Registered: August 2009

Junior Member

I've been using 8 VEs on a Ubuntu 8.04 (2.6.24) machine w/ one Server 2008 KVM machine. The only issue that I've had is that my machine is so new* that I had to turn off ACPI (acpi=off). I was gettings "soft lockup" messages all the time with ACPI enabled. Of course, turning off ACPI causes some real time clock issue so my Windows guest fall behind. Other than that I highly recommend 2.6.24 - if it seems stable after running for a few days then I'd venture to say it will stay that way!

* It's a Dell Studio 540 desktop w/ an Intel Q9650 and 8GB of RAM. The motherboard SATA ports aren't detected so I'm using an Adaptec card. The onboard Ethernet doesn't work either. I really hope that the OpenVZ development team is able to build kernel modules for whatever kernel is used in the next LTS (10.04) so my hardware works properly!

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