[Users] Pxeboot

[Li, David]

Not sure where the boot log is since I can't login.  

I got the source from https://github.com/primalmotion/archipel-node and followed the build instructions in
http://ovirt.org/wiki/Node_Building

maybe I should rebuild the iso from the ovirt node source tree as you have pulled in archipel changes yesterday. How do I do that?

- David


>-----Original Message-----
>From: Mike Burns [mailto:mburns at redhat.com]
>Sent: Thursday, February 09, 2012 7:22 AM
>To: Li, David
>Cc: Perry Myers; users at ovirt.org
>Subject: Re: [Users] Pxeboot
>
>On Thu, 2012-02-09 at 07:06 -0800, Li, David wrote:
>> Mike,
>>
>> I added adminpw as a kernel option. After boot, I tried "admin/abc123"
>> and "root/abc123" but not able to login.
>> Any idea?
>>
>
>Are there any errors in your build or boot logs?
>
>Mike
>
>> David
>>
>>
>> >-----Original Message-----
>> >From: Mike Burns [mailto:mburns at redhat.com]
>> >Sent: Wednesday, February 08, 2012 6:53 PM
>> >To: Li, David
>> >Cc: Perry Myers; users at ovirt.org
>> >Subject: Re: [Users] Pxeboot
>> >
>> >On Wed, 2012-02-08 at 17:11 -0800, Li, David wrote:
>> >> Ok, I built an iso out of archipel and pxebooted it with stateless
>> >> option.  Now
>> >I got a "localhost" login prompt.  Any idea what should I put in as user/pwd?
>> >> David
>> >
>> >You will need to pass a password in on the command line as well
>> >
>> >adminpw=<hashed_password>
>> >
>> >You can generate the hashed password using:
>> >
>> >$ openssl passwd
>> >
>> >Assuming the password was abc123
>> >
>> >$ openssl passwd abc123
>> >tKrQfufCbosr6
>> >
>> >adminpw=tKrQfufCbosr6
>> >
>> >Mike
>> >
>> >>
>> >> >-----Original Message-----
>> >> >From: Mike Burns [mailto:mburns at redhat.com]
>> >> >Sent: Wednesday, February 08, 2012 4:31 PM
>> >> >To: Li, David
>> >> >Cc: Perry Myers; users at ovirt.org
>> >> >Subject: RE: [Users] Pxeboot
>> >> >
>> >> >On Wed, 2012-02-08 at 15:43 -0800, Li, David wrote:
>> >> >> Ok, I think we are on the same page now regarding stateless node.
>> >> >> It looks like the achipel diff you just pulled in might be able
>> >> >> to do this. But I can't quite make it out what the kernel option should
>be.
>> >> >> Is it "stateless=1"?
>> >> >>
>> >> >
>> >> >stateless=1 or just stateless, both will work.
>> >> >
>> >> >
>> >> >> David
>> >> >>
>> >> >> >-----Original Message-----
>> >> >> >From: Mike Burns [mailto:mburns at redhat.com]
>> >> >> >Sent: Wednesday, February 08, 2012 3:27 PM
>> >> >> >To: Li, David
>> >> >> >Cc: Perry Myers; users at ovirt.org
>> >> >> >Subject: Re: [Users] Pxeboot
>> >> >> >
>> >> >> >On Wed, 2012-02-08 at 15:19 -0800, Li, David wrote:
>> >> >> >> 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
>> >> >> >
>> >> >> >It's not currently possible with ovirt-node.  That's the whole
>> >> >> >stateless feature that we outlined.  Once we actually have it
>> >> >> >implemented, it will be something along the lines of adding
>> >> >> >"stateless" to
>> >> >the kernel commandline.
>> >> >> >
>> >> >> >Mike
>> >> >> >>
>> >> >> >>
>> >> >> >> >-----Original Message-----
>> >> >> >> >From: Perry Myers [mailto:pmyers at redhat.com]
>> >> >> >> >Sent: Wednesday, February 08, 2012 2:54 PM
>> >> >> >> >To: Mike Burns
>> >> >> >> >Cc: Li, David; users at ovirt.org
>> >> >> >> >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
>> >> >> >> Users at ovirt.org
>> >> >> >> http://lists.ovirt.org/mailman/listinfo/users
>> >> >> >
>> >> >>
>> >> >
>> >>
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>>
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