Thanks for the detailed analysis. I'll look into it very soon. s3nt fr0m a $martph0ne, excuse typ0s On Oct 20, 2014 9:03 AM, "dmitry" <[email protected]> wrote:
> Hello ! > 17.10.2014 00:44, Ritesh Raj Sarraf пишет: > >> On Thursday 16 October 2014 09:10 AM, Dmitry Danilov wrote: >> >>> >>>> Yes, as I see, BLOCK_FILE variable should serves that. >>> >> >> Sorry. But I'm not understanding this correct. Are you saying we don't >> need the >> patch ? >> >> -- >> Ritesh Raj Sarraf >> RESEARCHUT -http://www.researchut.com >> "Necessity is the mother of invention." >> >> I think we need a patch. > > Let's look at problem again: > > What we have: > > system: > > root@archive:~# uname -a > Linux archive 3.2.0-4-amd64 #1 SMP Debian 3.2.60-1+deb7u3 x86_64 GNU/Linux > > root@archive:~# lsb_release -a > No LSB modules are available. > Distributor ID: Debian > Description: Debian GNU/Linux 7.6 (wheezy) > Release: 7.6 > Codename: wheezy > > mounted partitions: > > root@archive:~# mount > sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime) > proc on /proc type proc (rw,nosuid,nodev,noexec,relatime) > udev on /dev type devtmpfs (rw,relatime,size=10240k,nr_ > inodes=62130,mode=755) > devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime, > gid=5,mode=620,ptmxmode=000) > tmpfs on /run type tmpfs (rw,nosuid,noexec,relatime,size=50896k,mode=755) > /dev/disk/by-uuid/51c02def-2358-4270-a76d-3161633a1b22 on / type ext4 > (rw,relatime,errors=remount-ro,user_xattr,barrier=1,data=ordered) > tmpfs on /run/lock type tmpfs (rw,nosuid,nodev,noexec,relatime,size=5120k) > tmpfs on /run/shm type tmpfs (rw,nosuid,nodev,noexec, > relatime,size=296960k) > /dev/sdb1 on /mnt/sites_backup type ext4 (rw,relatime,user_xattr,acl, > barrier=1,data=ordered,_netdev) > /dev/sda1 on /mnt/sites_backup#2 type ext4 (rw,relatime,user_xattr, > barrier=1,stripe=128,data=ordered,_netdev) > > > Trying to restart|stop open-iscsi as if we have a new configured target: > > root@archive:~# /etc/init.d/open-iscsi restart > [....] Unmounting iscsi-backed filesystems: Unmounting all devices marked > _netdevumount: /: device is busy. > (In some cases useful info about processes that use > the device is found by lsof(8) or fuser(1)) > [warn] Could not unmount / ... (warning). > failed! > invoke-rc.d: initscript umountiscsi.sh, action "stop" failed. > [FAIL] Couldn't unmount all iSCSI devices. Cannot stop iSCSI service ... > failed! > root@archive:~# > > From initscript errors : umountiscsi trying to unmount "/" partition -- > Why? > > Inspect the situation: > > Adding -x parameter to umountiscsi.sh > > And try to restart service: > root@archive:~# /etc/init.d/open-iscsi restart > > Look on exerpt output(full report in attached file): > > Here (the cause of problem): > + [ -d /sys/devices/platform/host4/iscsi_host ] > + [ -d /sys/devices/platform/host4/session1/target4:0:0 ] > + sed s/.*block\/// > + echo /sys/devices/platform/host4/session1/target*/*:*/block/* > + BLOCK_DEV=* > + awk /^\/dev\/*/ { print $2; } > + DOS_PARTITIONS=/ > + umount / > umount: /: device is busy. > (In some cases useful info about processes that use > the device is found by lsof(8) or fuser(1)) > + exit_status=1 > > I think, shell expansion leds to that, so that is why I suggest code to > test BLOCK_DEV > variable as empty 'directory' in sysfs i.e. : > > + if ! [ -d $BLOCK_FILE ]; then > + continue > + fi > > > > And another view to the same problem: > > Code snippet for debug purposes (taken from 'umountiscsi.sh' file) > contains only traverse sysfs section: > > root@archive:~# cat traverse.sh > > #!/bin/sh -x > > for HOST_DIR in /sys/devices/platform/host*; do > if ! [ -d $HOST_DIR/iscsi_host* ]; then > continue > fi > for SESSION_DIR in $HOST_DIR/session*; do > if ! [ -d $SESSION_DIR/target* ]; then > continue > fi > for BLOCK_FILE in $SESSION_DIR/target*/*\:*/block/*; do > BLOCK_DEV=`echo "$BLOCK_FILE" | sed 's/.*block\///'` > DOS_PARTITIONS="`awk "/^\/dev\/$BLOCK_DEV/ { print \\$2; > }" < /proc/mounts`" > echo DEBUG:${BLOCK_FILE} > echo DEBUG:${DOS_PARTITIONS} > for DEVICE in $DOS_PARTITIONS; do > #log_progress_msg $DEVICE > #echo $DEVICE > echo umount ${DEVICE} > exit_status=$? > if ! [ $exit_status -eq 0 ]; then > umount_fail=1 > log_warning_msg "Could not unmount $DEVICE" > fi > done > done > done > done > > Output with trace mode i.e. bin/sh -x: > > root@archive:~# ./traverse.sh > + [ -d /sys/devices/platform/host4/iscsi_host ] > + [ -d /sys/devices/platform/host4/session1/target4:0:0 ] > + sed s/.*block\/// > + echo /sys/devices/platform/host4/session1/target*/*:*/block/* > + BLOCK_DEV=* > + awk /^\/dev\/*/ { print $2; } > + DOS_PARTITIONS=/ > + echo DEBUG:/sys/devices/platform/host4/session1/target*/*:*/block/* > DEBUG:/sys/devices/platform/host4/session1/target*/*:*/block/* > + echo DEBUG:/ > DEBUG:/ > + echo umount / > umount / > + exit_status=0 > + [ 0 -eq 0 ] > + [ -d /sys/devices/platform/host5/iscsi_host ] > + [ -d /sys/devices/platform/host5/session2/target5:0:0 ] > + sed s/.*block\/// > + echo /sys/devices/platform/host5/session2/target5:0:0/5:0:0:0/block/sdb > + BLOCK_DEV=sdb > + awk /^\/dev\/sdb/ { print $2; } > + DOS_PARTITIONS= > + echo DEBUG:/sys/devices/platform/host5/session2/target5:0:0/5: > 0:0:0/block/sdb > DEBUG:/sys/devices/platform/host5/session2/target5:0:0/5:0:0:0/block/sdb > + echo DEBUG: > DEBUG: > + [ -d /sys/devices/platform/host6/iscsi_host ] > + [ -d /sys/devices/platform/host6/session3/target6:0:0 ] > + sed s/.*block\/// > + echo /sys/devices/platform/host6/session3/target6:0:0/6:0:0:0/block/sda > + BLOCK_DEV=sda > + awk /^\/dev\/sda/ { print $2; } > + DOS_PARTITIONS= > + echo DEBUG:/sys/devices/platform/host6/session3/target6:0:0/6: > 0:0:0/block/sda > DEBUG:/sys/devices/platform/host6/session3/target6:0:0/6:0:0:0/block/sda > + echo DEBUG: > DEBUG: > root@archive:~# > > > Output without dash trace mode: > > root@archive:~# ./traverse.sh > DEBUG:/sys/devices/platform/host4/session1/target*/*:*/block/* > DEBUG:/ > umount / > DEBUG:/sys/devices/platform/host5/session2/target5:0:0/5:0:0:0/block/sdb > DEBUG: > DEBUG:/sys/devices/platform/host6/session3/target6:0:0/6:0:0:0/block/sda > DEBUG: > root@archive:~# > > -- > Dmitry Danilov. >
