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tests: idm: Add testing for the fabric failure

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When the fabric failure occurs, it will lose the connection with hosts
instantly, and after a while it can recovery back so that the hosts can
continue to access the drives.

For this case, the locking manager should be reliable for this case and
can dynamically handle this case and allows user to continue to use the
VG/LV with associated locking scheme.

This patch adds a testing to emulate the fabric faliure, verify LVM
commands for this case.  The testing usage is:

  # make check_lvmlockd_idm \
	LVM_TEST_BACKING_DEVICE=/dev/sdo3,/dev/sdp3,/dev/sdp4 \
	LVM_TEST_FAILURE=1 T=idm_fabric_failure.sh

Signed-off-by: Leo Yan <leo.yan@linaro.org>
This commit is contained in:
Leo Yan 2021-06-03 17:59:18 +08:00 committed by David Teigland
parent 874001ee6e
commit fc0495ea04
1 changed files with 58 additions and 0 deletions
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test/shell/idm_fabric_failure.sh Normal file
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#!/usr/bin/env bash
# Copyright (C) 2020 Seagate, Inc. All rights reserved.
#
# This copyrighted material is made available to anyone wishing to use,
# modify, copy, or redistribute it subject to the terms and conditions
# of the GNU General Public License v2.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
SKIP_WITH_LVMPOLLD=1
. lib/inittest
[ -z "$LVM_TEST_FAILURE" ] && skip;
aux prepare_devs 3
aux extend_filter_LVMTEST
vgcreate $SHARED $vg "$dev1" "$dev2" "$dev3"
# Create new logic volume
lvcreate -a ey --zero n -l 50%FREE -n $lv1 $vg
DRIVE1=`dmsetup deps -o devname $dev1 | awk '{gsub(/[()]/,""); print $4;}' | sed 's/[0-9]*$//'`
DRIVE2=`dmsetup deps -o devname $dev2 | awk '{gsub(/[()]/,""); print $4;}' | sed 's/[0-9]*$//'`
DRIVE3=`dmsetup deps -o devname $dev3 | awk '{gsub(/[()]/,""); print $4;}' | sed 's/[0-9]*$//'`
HOST1=`readlink /sys/block/$DRIVE1 | awk -F'/' '{print $6}'`
HOST2=`readlink /sys/block/$DRIVE2 | awk -F'/' '{print $6}'`
HOST3=`readlink /sys/block/$DRIVE3 | awk -F'/' '{print $6}'`
# Emulate fabric failure
echo 1 > /sys/block/$DRIVE1/device/delete
[ -f /sys/block/$DRIVE2/device/delete ] && echo 1 > /sys/block/$DRIVE2/device/delete
[ -f /sys/block/$DRIVE3/device/delete ] && echo 1 > /sys/block/$DRIVE3/device/delete
# Wait for 10s and will not lead to timeout
sleep 10
# Rescan drives so can probe the deleted drives and join back them
echo "- - -" > /sys/class/scsi_host/${HOST1}/scan
echo "- - -" > /sys/class/scsi_host/${HOST2}/scan
echo "- - -" > /sys/class/scsi_host/${HOST3}/scan
not check grep_lvmlockd_dump "S lvm_$vg kill_vg"
# The previous device-mapper are removed, but LVM still can directly
# access VGs from the specified physical drives. So enable drives
# for these drives.
aux extend_filter_LVMTEST "a|/dev/$DRIVE1*|" "a|/dev/$DRIVE2*|" "a|/dev/$DRIVE3*|"
aux lvmconf "devices/allow_changes_with_duplicate_pvs = 1"
lvcreate -a n --zero n -l 10 -n $lv2 $vg
vgremove -ff $vg