Re: [Oscar-users] Re: RH9: Client build faliure (/proc)

[Frank C. <Fra...@ac...>]

Vijay,

On Mon, 2005-03-07 at 23:35 -0600, Vijay Avarachen wrote:
> Hello again,
>      I finally got the nodes to build successfully!  In the process I
> learned two things that I think might be good additions to some sort
> of FAQ.
> 
> [1] Ensure that your /boot is mounted prior to attempting to create a
> image.  Many distributions unmount /boot on successful boot as a
> precautionary step.  I created two images which had the boot partition
> empty, thats when I realized that the boot was not mounted.
> [2] For some very very strange reason, when I successfully created a
> new image (with boot mounted), in
> /var/lib/systemimager/images/<myimage> the proc folder of this image
> was behaving strangely.  It was actually behaving exactly like a
> regural proc file system.  During the node installs the strange error
> messages I was getting was because the proc folder was being copied
> over and that was causing problems.  When I noticed this, I knew that
> proc should not be copied/rsynced.  I went to the image directory and
> noticed that the proc folder of the image also had the same entries as
> my head nodes proc.  What was worse was that it would not let me
> delete it, just like you cannot delete your real proc folder.  Finally
> I had to reboot the headnode, and when it came back up the images proc
> folder was empty.  I was finally able to build nodes without strange
> proc error messages.

Had you applied an update to the kernel with something like:

rpm -U --root /var/lib/systemimages/images/XXX kernel-*.rpm

At least once before when I did this, the rpm install mounted /proc on
the chrooted /proc (i.e. /var/lib/systemimages/images/XXX/proc) and I
ran into the same problem as you.  It isn't a copy of /proc, it is the
real /proc, mounted in two different locations.

To unmount it, I needed to do a:

chroot /var/lib/systemimages/images/XXX umount /proc

although your reboot would have the same effect.

Frank

> I hope this helps someone out!
> 
> Vijay Avarachen
> On Mon, 7 Mar 2005 13:59:21 -0600, Vijay Avarachen <vav...@gm...> wrote:
> > Hello,
> >    Here is a overview of my setup, 5 HP Visualize workstation (all
> > identical), Headnode running RH9.0 with no updates, Using Oscar 4.0.
> > 
> > I get to step 6 with no problems.  I am attaching my rpm list file and
> > partitioning scheme to this email.
> > 
> > The problem I run into is building the nodes.  
> > 
> > [1] The nodes boot successfuly from PXE
> > [2] node boots the pxe supplied kernel, loading all the necessary modules
> > [3] Partitions the three SCSI drives according the the partition
> > scheme I specified in image
> > [4] Initially when its starts copying files from headnode, it spits
> > out some error messages about /proc
> > [5] Continues to copy a lot of files from the headnode, then it pauses
> > at exactly /usr/lib/Omni
> > [6] After 10-15 mins (during which the Headnode shows a lot of rsync
> > activity) the node starts to copy files again.
> > THEN IT FAILS :-(
> > 
> > error messages on screen look like:
> > stat proc/827/fd: No such file or directory
> > rsyn: recv generator: mkdir "proc/835": No such file or directory (2)
> > 
> > I have no idea why it would rsync /proc in the first place.  I though
> > /dev and /proc were dynamically generated, then why rsync it?  I have
> > been struggling with various issues (all related to unreliable NIC
> > cards in the past) for a very long time.  This is the farthest I have
> > gotten.  I tried this with FC2 and RH9 and I get the same issue.  Also
> > I just noticed that the node froze when I tried to <shift>+<pg
> > up/down> too many times.  Any help would be appreciated.
> > 
> > Vijay Avarachen
> > 
> >
> 
> 
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