| Migrating to OpenVZ from BSD jails [message #43015] |
Fri, 01 July 2011 15:39  |
Phil Lello
Messages: 1
Registered: July 2011
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Junior Member |
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Hi all,
I'm currently using a development environment using multiple bsd jails, and
would like to migrate to openvz.
The jails need to emulate Ubuntu 10.04 (kernel 2.6.32), however I believe
the patches for this kernel are still experimental.
Is this true? If so, are the known issues to do with stability or security?
My needs could probably be met by a simple chroot, but binding IP addresses
to a container means I can keep this environment much closer to production
(which uses real hardware nodes instead of jails). I don't hugely need a
separate pid space (provided all my start/stop scripts use pidfiles instead
of polling running processes - something I wouldn't want to make assumptions
about).
The only other option I can think of would be full/para virtualisation, but
I've currently got about 30 BSD jails, so this makes memory requirements
excessive (unless I'm using a bubble memory driver). Full virtualisation is
also not ideal, because at some point my dev environment will move to a VM,
and nested virtualisation carries it's own set of headaches.
Thanks for any help or advice you can offer,
Phil
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| Re: Migrating to OpenVZ from BSD jails [message #43017 is a reply to message #43015] |
Fri, 01 July 2011 17:40  |
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dowdle
Messages: 261
Registered: December 2005
Location: Bozeman, Montana
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Senior Member |
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Greetings,
----- Original Message -----
> The jails need to emulate Ubuntu 10.04 (kernel 2.6.32), however I
> believe the patches for this kernel are still experimental.
>
> Is this true? If so, are the known issues to do with stability or
> security?
Depends.
There are two branches based on 2.6.32... the generic one and the RHEL6-based one. Both are still marked as "Development" here:
http://wiki.openvz.org/Download/kernel
There is also a 2.6.32-based kernel that Debian has in their repos for Debian 6. I believe it uses the OpenVZ 2.6.32 generic patch but of course Debian's kernel isn't the stock kernel.org kernel.
I've heard of a few differences in functionality between the RHEL6-based kernel and that shipped by Debian. Ubuntu does not offer an OpenVZ kernel that I'm aware of.
I've been using the RHEL6-based kernel on RHEL 6.1 and it seems to work fine but it isn't a production machine and I haven't done a whole lot of testing. The OpenVZ Project has been updating the RHEL6-based kernel frequently both to keep up with RHEL kernel updates as well as fix OpenVZ-related bugs that are reported.
So, what host node distro are you planning on using? I'd recommend using the RHEL6-based OpenVZ kernel if at all possible. If you haven't done so already, I strongly recommend you setup a system and give it a try for yourself... and do some testing. If you find any bugs report them to bugzilla.openvz.org.
TYL,
--
Scott Dowdle
704 Church Street
Belgrade, MT 59714
(406)388-0827 [home]
(406)994-3931 [work]
--
TYL, Scott Dowdle
Belgrade, Montana, USA
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