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

[Dennis Leeuw]

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

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