[Users] Pxeboot

Li, David LiD at cloudshield.com
Thu Feb 9 16:30:20 UTC 2012 

Mike,

Two quick questions before I kick off a build:

1. Git errors. Do they matter?


[lid at FC16-1 node-archipel-2.2.2]$ git clone http://gerrit.ovirt.org/p/ovirt-node.git refs/changes/38/1738/1&&git checkout FETCH_HEAD
Cloning into refs/changes/38/1738/1...
remote: Counting objects: 14791, done
remote: Finding sources: 100% (14791/14791)
remote: Total 14791 (delta 10855), reused 14778 (delta 10855)
Receiving objects: 100% (14791/14791), 16.92 MiB | 154 KiB/s, done.
Resolving deltas: 100% (10855/10855), done.
fatal: Not a git repository (or any of the parent directories): .git


2. Build machine.

I am using a x86_64 FC16 VM as the build machine. My target is x86_64 Intel board. Is this ok?



- David
________________________________________
From: Mike Burns [mburns at redhat.com]
Sent: Thursday, February 09, 2012 8:16 AM
To: Li, David
Cc: Perry Myers; users at ovirt.org
Subject: RE: [Users] Pxeboot

On Thu, 2012-02-09 at 08:10 -0800, Li, David wrote:
> 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?

git fetch http://gerrit.ovirt.org/p/ovirt-node refs/changes/38/1738/1 &&
git checkout FETCH_HEAD

That command will checkout the current version of the archipel-node
changes.  Then you can just follow the Node_Building process.  Note that
the changes aren't merged into master yet.  I'm still in the process of
reviewing them.

Mike
>
> - 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
> >> >> >> >
> >> >> >>
> >> >> >
> >> >>
> >> >> _______________________________________________
> >> >> Users mailing list
> >> >> Users at ovirt.org
> >> >> http://lists.ovirt.org/mailman/listinfo/users
> >> >
> >>
> >> _______________________________________________
> >> Users mailing list
> >> Users at ovirt.org
> >> http://lists.ovirt.org/mailman/listinfo/users
> >
>

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