Perry, I am glad you brought this up. I 'd be perfectly happy to run the root fs entirely in RAM. In fact that would be ideal for me. It's just I am not quite sure how to use pxeboot to achieve this.
I am doing a test now using the tftpboot files created from the iso. As far as I see, the kernel boot options (pxelinux.cfg/default) has: root=live:/ovirt-node-image-2.2.2-1.1.fc16.iso With this I can only pxeboot to the intall screen. What should I use to let the kernel mount the root fs in memory? Something like root=/dev/ram0? David >-----Original Message----- >From: Perry Myers [mailto:[email protected]] >Sent: Wednesday, February 08, 2012 2:54 PM >To: Mike Burns >Cc: Li, David; [email protected] >Subject: Re: [Users] Pxeboot > >On 02/08/2012 05:03 PM, Mike Burns wrote: >> On Wed, 2012-02-08 at 13:46 -0800, Li, David wrote: >>> Mike, >>> >>> If I understand this correctly, today I should be able to pxeboot and >>> nfs mount the root fs from a remote server. Apart from setting up >>> the pxe stuff, I 'd have to populate the ovirt node root fs on the >>> server >>> - perhaps steal it from a disk install. In other words I am >>> concerned about the point from which the kernel starts to execute >>> /init script (in the initramfs) to the point /init is able to mount >>> the final root fs from a remote server. >> >> No, there is no way to set this up currently in ovirt-node. You could >> install using a remote iscsi lun if you have a hardware iscsi HBA, but >> there isn't a way to mount a remote nfs share as the root fs. >> >> Supporting a remote NFS share as the root fs isn't even something that >> requested as an RFE at this point or on the roadmap as far as I'm >> aware. >> >> It sounds like what you're really looking for is a shared root fs that >> multiple hosts could use. This is something that we will probably >> look into eventually, but it's not on the immediate roadmap. > >Given that the rootfs of oVirt Node is fairly small and in a truly stateless >environment would just run out of system RAM, there's no real reason to try >to do a shared NFS based rootfs. It's an unnecessary complication I think, if >the end goal is to move to truly stateless. > >For larger systems where the rootfs is on the order of GB's, shared root may >make more sense. _______________________________________________ Users mailing list [email protected] http://lists.ovirt.org/mailman/listinfo/users
