Re: ltsp_nbd: work around some udev/upstart issues?

Alkis,

You have my vote. I proposed this same patch about a year ago when
stephane was working on nbd-proxy and it was introducing issues. I
found that the patch only helped and did no harm.

-Gadi

On Wed, Sep 15, 2010 at 4:34 AM, Alkis Georgopoulos <[email protected]> wrote:
> I've had reports of fast clients not booting, possibly because of udev
> or upstart problems, and with the following patch they were solved.
>
> It just makes nbd-client retry connecting up to 10 times, if it fails.
> On the problematic clients, it succeeds on the 2-4 try.
>
> I don't have the experience to fix the udev/upstart problems, so I'm
> asking about policy, should I commit this? It shouldn't cause any harm,
> nfs too retries mounting if it fails...
>
> Cheers,
> Alkis
>
>
> === modified file 'client/initramfs/scripts/ltsp_nbd'
> --- client/initramfs/scripts/ltsp_nbd   2010-08-23 19:42:59 +0000
> +++ client/initramfs/scripts/ltsp_nbd   2010-09-15 07:32:01 +0000
> @@ -84,7 +84,19 @@
>     fi
>
>     # Mount the root device
> -    if nbd-client $NBD_CLIENT_ROOT_SERVER $NBD_ROOT_PORT /dev/nbd0 ; then
> +    # Try up to 10 times with 2 sec interval because of udev/upstart bugs
> +    i=0
> +    while [ $i -lt 10 ]; do
> +        i=$(($i+1))
> +        if nbd-client $NBD_CLIENT_ROOT_SERVER $NBD_ROOT_PORT /dev/nbd0; then
> +            i=20
> +            break
> +        else
> +            echo "Warning: failed to connect to NBD server $NBD_ROOT_SERVER:$NBD_ROOT_PORT, retrying..."
> +            sleep 2
> +        fi
> +    done
> +    if [ $i -eq 20 ]; then
>         eval $(fstype /dev/nbd0)
>         if [ -z "$FSTYPE" ]; then
>             echo "Warning: unable to detect filesystem, assuming squashfs."
>
>
>
> ------------------------------------------------------------------------------
> Start uncovering the many advantages of virtual appliances
> and start using them to simplify application deployment and
> accelerate your shift to cloud computing.
> http://p.sf.net/sfu/novell-sfdev2dev
> _____________________________________________________________________
> Ltsp-developer mailing list.   To un-subscribe, or change prefs, goto:
>      https://lists.sourceforge.net/lists/listinfo/ltsp-developer
> For additional LTSP help,   try #ltsp channel on irc.freenode.net
>



-- 
Gideon Romm
Symbio Technologies | www.symbio-technologies.com
(o) 914.576.1205 | (f) 914.576.0944

------------------------------------------------------------------------------
Start uncovering the many advantages of virtual appliances
and start using them to simplify application deployment and
accelerate your shift to cloud computing.
http://p.sf.net/sfu/novell-sfdev2dev
_____________________________________________________________________
Ltsp-developer mailing list.   To un-subscribe, or change prefs, goto:
      https://lists.sourceforge.net/lists/listinfo/ltsp-developer
For additional LTSP help,   try #ltsp channel on irc.freenode.net