Hi all,
I try to get session fail over work with lio target on rhel 7.
For testing i have written a Shell script an connected the lun to Windows
Server 2012.
When I simulate the fail over i start file copy and start the script with
stop Parameter. After a few seconds the copy on Windows stalled and after
starting the script with start parameter I get a message on Windows, that
the copy has failed - with auto attached lun.
What i see is that the pindows cache parameter on the attached volume is
set and i have no chance to disable it (emulate_write_cache is 0)
Here the script
#!/bin/bash
TARGET_IQN=iqn.2014-03.org.mydomain.test01:testport
INIT_IQN=iqn.1991-05.com.microsoft:win2012.mydomain.org
INIT_PAS=secret123456
PORTAL=10.1.1.220
start()
{
targetcli /backstores/block create dev=/dev/zvol/pool-test/iscsi/testlun
name=testlun
targetcli /iscsi create ${TARGET_IQN}
echo 0 > /sys/kernel/config/target/iscsi/${TARGET_IQN}/tpgt_1/enable
targetcli /iscsi/${TARGET_IQN}/tpg1 set parameter DefaultTime2Retain=5
targetcli /iscsi/${TARGET_IQN}/tpg1 set parameter DefaultTime2Wait=60
targetcli /iscsi/${TARGET_IQN}/tpg1 set parameter ErrorRecoveryLevel=2
targetcli /iscsi/${TARGET_IQN}/tpg1/portals create ${PORTAL}
targetcli /iscsi/${TARGET_IQN}/tpg1/acls create ${INIT_IQN}
targetcli /iscsi/${TARGET_IQN}/tpg1/acls/${INIT_IQN} set auth
userid=${INIT_IQN}
targetcli /iscsi/${TARGET_IQN}/tpg1/acls/${INIT_IQN} set auth
password=${INIT_PAS}
targetcli /iscsi/${TARGET_IQN}/tpg1/luns create /backstores/block/testlun
echo 1 > /sys/kernel/config/target/iscsi/${TARGET_IQN}/tpgt_1/enable
}
stop()
{
echo 0 > /sys/kernel/config/target/iscsi/${TARGET_IQN}/tpgt_1/enable
targetcli /iscsi delete ${TARGET_IQN}
targetcli /backstores/block delete name=testlun
}
# See how we are called
case "$1" in
start)
start
RETVAL=$?
;;
stop)
stop
RETVAL=$?
;;
esac
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