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List:       ltsp-developer
Subject:    Re: [Ltsp-developer] ltsp_nbd: work around some udev/upstart issues?
From:       Alkis Georgopoulos <alkisg () gmail ! com>
Date:       2010-09-24 10:58:12
Message-ID: 1285325892.1481.0.camel () alkis
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Thank you all for your feedback, committed in
http://bazaar.launchpad.net/~ltsp-upstream/ltsp/ltsp-trunk/revision/1777#client/initramfs/scripts/ltsp_nbd



Στις 15-09-2010, ημέρα Τετ, και ώρα 17:29 +0530, ο/η Jigish Gohil
έγραψε:
> On Wed, Sep 15, 2010 at 5:27 PM, Jigish Gohil <cyberorg@opensuse.org> wrote:
> > 
> > This is what kiwi's linuxrc does, pasting relevant parts here:
> > 
> 
> Missed this one:
> 
> function udevPending {
> local timeout=30
> if [ -x /sbin/udevadm ];then
> /sbin/udevadm trigger
> /sbin/udevadm settle --timeout=$timeout
> else
> /sbin/udevtrigger
> /sbin/udevsettle --timeout=$timeout
> fi
> }
> 
> > #======================================
> > # waitForBlockDevice
> > #--------------------------------------
> > function waitForBlockDevice {
> > # /.../
> > # function to check if the given block device
> > # exists. If not the function will wait until the
> > # device appears or the check counter equals 4
> > # ----
> > local device=$1
> > local check=0
> > udevPending
> > while true;do
> > if [ -b $device ] || [ $check -eq 4 ];then
> > break
> > fi
> > Echo "Waiting for device $device to settle..."
> > check=`expr $check + 1`
> > sleep 2
> > done
> > }
> > 
> > if [ -z "$nbdDevice" ];then
> > nbdDevice="/dev/nbd0"
> > fi
> > 
> > waitForBlockDevice $nbdDevice
> > 
> > Echo "Mounting NBD root system: $nbdServer $nbdPort [$nbdDevice]..."
> > if ! nbd-client $nbdServer $nbdPort $nbdDevice -persist;then
> > systemException "Failed to setup $nbdDevice device" "reboot"
> > fi
> > 
> > Full code here: http://git.berlios.de/cgi-bin/gitweb.cgi?p=kiwi;a=summary
> > 
> > Cheers
> > 
> > -J
> > 
> > > 
> > > > -    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
> 
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