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Re: Linux version host/guest [message #27855 is a reply to message #27847]

Fri, 29 February 2008 10:35

jmelyn
Messages: 27
Registered: June 2007

Junior Member

Thank you again, Pavel, for your precise answer.

I'm afraid this open my mind and finally I have another question. If we decide to switch to OpenVZ for our ~ 150 servers, we need to manage them in an easy, logical manner.

Imagine we got hosts and guests running fine. One day a kernel update is available for guests and we would like to spread this new version.

We have two possibilities to make the update:

1) We make a new guest cache and re-install all servers, one by one. It seems to be less than a minute for each guest to be re-installed. Brute force, local data must be saved-restored. This is the static way of updating: /etc/vz/conf/<guest_id>.conf provides the kernel version.

2) We use vzyum (or vzrpm) from each host to update all guests. This solution is not possible as we run a 64 bit OS (based on RHEL 5.1) and vzyum (or vzrpm) cannot be installed. So we enter each guest from hosts and make the update from inside (yum or rpm). This is the dynamic way of updating: the config file does not give the kernel version and we have to check it.

So here is my question: Is the dynamic kernel update is possible (then how check Linux version?), usable and used? Or the static way is a better solution even if there is a bit more work...

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[Message index]

		Linux version host/guest By: jmelyn on Wed, 27 February 2008 10:57
		Re: Linux version host/guest By: jmelyn on Thu, 28 February 2008 07:14
		Re: Linux version host/guest By: xemul on Thu, 28 February 2008 08:16
		Re: Linux version host/guest By: jmelyn on Thu, 28 February 2008 08:30
		Re: Linux version host/guest By: xemul on Fri, 29 February 2008 08:44
		Re: Linux version host/guest By: jmelyn on Fri, 29 February 2008 10:35
		Re: Linux version host/guest By: maratrus on Fri, 29 February 2008 13:32
		Re: Linux version host/guest By: jmelyn on Fri, 29 February 2008 14:23
		Re: Linux version host/guest By: maratrus on Fri, 29 February 2008 16:22
		Re: Linux version host/guest By: jmelyn on Sat, 01 March 2008 10:08
		Re: Linux version host/guest By: ugob on Sun, 02 March 2008 04:25
		Re: Linux version host/guest By: jmelyn on Mon, 03 March 2008 08:25
		Re: Linux version host/guest By: dowdle on Tue, 11 March 2008 20:10

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