Re: [CentOS] How to generate UUID for Xen?
On Dec 18, 2007 3:56 PM, Kai Schaetzl [EMAIL PROTECTED] wrote: The new virtual machine manager in Centos 5.1 displays some weird behavior here and I assume it's because the UUID of one running VM is the same as of a VM that is shut down. I used the same config file template for creating all my test VMs, so several have the same UUID. Didn't produce any problems with xm. But the new VM manager in Gnome shows active and inactive VMs and identifies them by UUID, which results in it trying to mix the status etc. of the active and of the inactive VM. How can I generate a new UUID? I assume there's some checksum in it, so that I can't just make one up? In my experience, at least with Xen, is that you can generate the UUID yourself. It suppose to be a unique number that identifies a VM. Regards, Tim -- Tim Verhoeven - [EMAIL PROTECTED] - 0479 / 88 11 83 Hoping the problem magically goes away by ignoring it is the microsoft approach to programming and should never be allowed. (Linus Torvalds) ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] How to generate UUID for Xen?
On Tue, 18 Dec 2007, Kai Schaetzl wrote: How can I generate a new UUID? I assume there's some checksum in it, so that I can't just make one up? When I use a configuration file as a template, I always remove the uuid line entirely and let Xen generate it. I've been doing this for a little over a year and have never had any problems because of it. Steve ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] How to generate UUID for Xen?
On Dec 18, 2007 4:25 PM, Steve Thompson [EMAIL PROTECTED] wrote: On Tue, 18 Dec 2007, Kai Schaetzl wrote: How can I generate a new UUID? I assume there's some checksum in it, so that I can't just make one up? When I use a configuration file as a template, I always remove the uuid line entirely and let Xen generate it. I've been doing this for a little over a year and have never had any problems because of it. I do the same for the MAC addresses too. Steve ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos -- Alain Spineux aspineux gmail com May the sources be with you ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] How to generate UUID for Xen?
On Tue, 18 Dec 2007, Kai Schaetzl wrote: Steve Thompson wrote on Tue, 18 Dec 2007 10:25:30 -0500 (EST): When I use a configuration file as a template, I always remove the uuid line entirely and let Xen generate it. So, I would destroy the machine, remove the UUID from the config file and then restart the VM and it writes a new one to it? Or does it just generate a runtime UUID? Just remove the UUID from the config file and start the VM; no need to destroy it. It just generates a runtime UUID; the config file does not get modified. Steve ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] How to generate UUID for Xen?
Steve Thompson wrote on Tue, 18 Dec 2007 11:42:53 -0500 (EST): Just remove the UUID from the config file and start the VM; no need to destroy it. Well, I had to shut it down before it could use a different UUID. That's what I meant. I removed the UUID from all config files now, thanks for the tip! Kai -- Kai Schätzl, Berlin, Germany Get your web at Conactive Internet Services: http://www.conactive.com ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] How to generate UUID for Xen?
Kai Schaetzl wrote: Steve Thompson wrote on Tue, 18 Dec 2007 11:42:53 -0500 (EST): Just remove the UUID from the config file and start the VM; no need to destroy it. Well, I had to shut it down before it could use a different UUID. That's what I meant. I removed the UUID from all config files now, thanks for the tip! Kai I use uuidgen to generate a random uuid, and then use this python script to generate a random mac address. I think this was on a help page somewhere that I stumbled across. #! /usr/bin/python # macgen.py script generates a MAC address for Xen guests # import random mac = [ 0x00, 0x16, 0x3e, random.randint(0x00, 0x7f), random.randint(0x00, 0xff), random.randint(0x00, 0xff) ] print ':'.join(map(lambda x: %02x % x, mac)) ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
