[Pkg-iscsi-maintainers] Bug#705031: base: netdev boot sequence problem and possible fix

[Holger Levsen]

reassign 705031open-iscsi
thanks

On Dienstag, 9. April 2013, Dennis Leeuw wrote:
> Package: base
> Severity: important
> 
> When using iSCSI devices with multipathd, the open-iscsi boot script is
> started before multipathd, hence the system tries to mount _netdev devices
> before multipath is up-and-running. Thus my iSCSI devices are not mounted
> at boot time and need thus be mounted manualy, which is not a handy thing
> to do for /home
> 
> I created a new script called /etc/init.d/mountnetdev, which can be run
> with start|stop to mount/umount all _netdev devices or one can use the
> stop with a subsystem to stop only part of the mounts.
> 
> One important note: the script is in a very early stage, and still requires
> bash since dash does not support ${var:x:y}. In the open-iscsi script I
> replaced umountiscsi.sh with: mountnetdev stop iscsi
> 
> In /etc/rc2.d I created a symlink S23z-mountnetdev so the script is started
> at boot after all _netdev required daemons are started.
> 
> Hope this helps to make Debian an even better distro.
> 
> Greetings,
> 
> Dennis Leeuw
> 
> Script:
> #! /bin/bash
> ### BEGIN INIT INFO
> # Provides:          mountnetdev
> # Required-Start:
> # Required-Stop:
> # Should-Start:      $network
> # Default-Start:     S
> # Default-Stop:
> # Short-Description: Wait for network file systems to be mounted
> # Description:       Mount and umount _netdev marked filesystems
> ### END INIT INFO
> 
> . /lib/init/vars.sh
> . /lib/lsb/init-functions
> 
> do_stop_subsys() {
>     local mountpnt=""
>     local device=""
>     local syspath=""
>     case $1 in
> 	iscsi)
> 	    # It can be a multipath device
> 	    #           a LVM device
> 	    #		a plain ISCSI disk
> 	    # FIXME make sure /etc/fstab is there
> 	    for mountpnt in `grep _netdev /etc/fstab | cut -d' ' -f1 | cut -d"	"
> -f1`; do # Strip trailing /
> 		device=${mountpnt%/}
> 		# Strip path
> 		device=${device##*/}
> 		# Strip part
> 		device=${device%-*}
> 
> 		# Check to see if it is a multipath device, very basic check
> 		if [ "${device:0:5}" = "mpath" ]; then
> 			# It's a multipath device: get the active path's disk
> 			device=`multipath -l $device | grep -A1 status=active | tail -1 
| cut
> -d' ' -f4` fi
> 
> 		# FIXME make sure /sys/ is mounted
> 		# Find the disk in /sys/
> 		syspath=`find /sys/ -name "$device"`
> 		syspath=${syspath%/session*}
> 
> 		# See if it has iscsi_host set
> 		if [ -e ${syspath}/iscsi_host ]; then
> 		    log_daemon_msg "Unmounting iscsi filesystem ${mountpnt}"
> 		    UMOUNT_RESULT=1
> 		    if umount ${mountpnt} >/dev/null 2>&1; then
> 			UMOUNT_RESULT=0
> 		    fi
> 		    log_end_msg $UMOUNT_RESULT
> 		fi
> 
> 	    done
> 	;;
>     esac
> }
> 
> case "$1" in
>     start)
> 	# Let's mount
> 	log_daemon_msg "Mounting _netdev filesystems"
> 	MOUNT_RESULT=1
> 	if mount -a -O _netdev >/dev/null 2>&1; then
> 		MOUNT_RESULT=0
> 	fi
> 	log_end_msg $MOUNT_RESULT
>         ;;
>     restart|reload|force-reload)
>         echo "Error: argument '$1' not supported" >&2
>         exit 3
>         ;;
>     stop)
> 	if [ "$2" = "" ]; then
> 	    # Let's umount
> 	    log_daemon_msg "Unmounting _netdev filesystems "
> 	    UMOUNT_RESULT=1
> 	    if umount -a -O _netdev >/dev/null 2>&1; then
> 		UMOUNT_RESULT=0
> 	    fi
> 	    log_end_msg $UMOUNT_RESULT
> 	else
> 		do_stop_subsys $2
> 	fi
>         ;;
>     *)
>         echo "Usage: $0 start|stop" >&2
>         exit 3
>         ;;
> esac
> 
> : exit 0
> 
> -- System Information:
> Debian Release: 6.0.7
>   APT prefers stable-updates
>   APT policy: (500, 'stable-updates'), (500, 'stable')
> Architecture: amd64 (x86_64)
> 
> Kernel: Linux 2.6.32-5-amd64 (SMP w/4 CPU cores)
> Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
> Shell: /bin/sh linked to /bin/dash
> 
> ---------------------------------------------------------------------------
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.alioth.debian.org/pipermail/pkg-iscsi-maintainers/attachments/20130409/7c987fd7/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 828 bytes
Desc: This is a digitally signed message part.
URL: <http://lists.alioth.debian.org/pipermail/pkg-iscsi-maintainers/attachments/20130409/7c987fd7/attachment-0001.pgp>