Documentation/target: add an example script to configure an iSCSI target
The script illustrates how to interact with configfs to create a very simple LIO iSCSI target with a file or block device backstore. The script can serve as a starting point for people that cannot use targetcli because Python is not available on their machine. Signed-off-by: Christophe Vu-Brugier <cvubrugier@fastmail.fm> Signed-off-by: Vincent Donnefort <vdonnefort@gmail.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
parent
df6751f340
commit
38d454f0b5
80
Documentation/target/target-export-device
Executable file
80
Documentation/target/target-export-device
Executable file
|
@ -0,0 +1,80 @@
|
|||
#!/bin/sh
|
||||
#
|
||||
# This script illustrates the sequence of operations in configfs to
|
||||
# create a very simple LIO iSCSI target with a file or block device
|
||||
# backstore.
|
||||
#
|
||||
# (C) Copyright 2014 Christophe Vu-Brugier <cvubrugier@fastmail.fm>
|
||||
#
|
||||
|
||||
print_usage() {
|
||||
cat <<EOF
|
||||
Usage: $(basename $0) [-p PORTAL] DEVICE|FILE
|
||||
Export a block device or a file as an iSCSI target with a single LUN
|
||||
EOF
|
||||
}
|
||||
|
||||
die() {
|
||||
echo $1
|
||||
exit 1
|
||||
}
|
||||
|
||||
while getopts "hp:" arg; do
|
||||
case $arg in
|
||||
h) print_usage; exit 0;;
|
||||
p) PORTAL=${OPTARG};;
|
||||
esac
|
||||
done
|
||||
shift $(($OPTIND - 1))
|
||||
|
||||
DEVICE=$1
|
||||
[ -n "$DEVICE" ] || die "Missing device or file argument"
|
||||
[ -b $DEVICE -o -f $DEVICE ] || die "Invalid device or file: ${DEVICE}"
|
||||
IQN="iqn.2003-01.org.linux-iscsi.$(hostname):$(basename $DEVICE)"
|
||||
[ -n "$PORTAL" ] || PORTAL="0.0.0.0:3260"
|
||||
|
||||
CONFIGFS=/sys/kernel/config
|
||||
CORE_DIR=$CONFIGFS/target/core
|
||||
ISCSI_DIR=$CONFIGFS/target/iscsi
|
||||
|
||||
# Load the target modules and mount the config file system
|
||||
lsmod | grep -q configfs || modprobe configfs
|
||||
lsmod | grep -q target_core_mod || modprobe target_core_mod
|
||||
mount | grep -q ^configfs || mount -t configfs none $CONFIGFS
|
||||
mkdir -p $ISCSI_DIR
|
||||
|
||||
# Create a backstore
|
||||
if [ -b $DEVICE ]; then
|
||||
BACKSTORE_DIR=$CORE_DIR/iblock_0/data
|
||||
mkdir -p $BACKSTORE_DIR
|
||||
echo "udev_path=${DEVICE}" > $BACKSTORE_DIR/control
|
||||
else
|
||||
BACKSTORE_DIR=$CORE_DIR/fileio_0/data
|
||||
mkdir -p $BACKSTORE_DIR
|
||||
DEVICE_SIZE=$(du -b $DEVICE | cut -f1)
|
||||
echo "fd_dev_name=${DEVICE}" > $BACKSTORE_DIR/control
|
||||
echo "fd_dev_size=${DEVICE_SIZE}" > $BACKSTORE_DIR/control
|
||||
echo 1 > $BACKSTORE_DIR/attrib/emulate_write_cache
|
||||
fi
|
||||
echo 1 > $BACKSTORE_DIR/enable
|
||||
|
||||
# Create an iSCSI target and a target portal group (TPG)
|
||||
mkdir $ISCSI_DIR/$IQN
|
||||
mkdir $ISCSI_DIR/$IQN/tpgt_1/
|
||||
|
||||
# Create a LUN
|
||||
mkdir $ISCSI_DIR/$IQN/tpgt_1/lun/lun_0
|
||||
ln -s $BACKSTORE_DIR $ISCSI_DIR/$IQN/tpgt_1/lun/lun_0/data
|
||||
echo 1 > $ISCSI_DIR/$IQN/tpgt_1/enable
|
||||
|
||||
# Create a network portal
|
||||
mkdir $ISCSI_DIR/$IQN/tpgt_1/np/$PORTAL
|
||||
|
||||
# Disable authentication
|
||||
echo 0 > $ISCSI_DIR/$IQN/tpgt_1/attrib/authentication
|
||||
echo 1 > $ISCSI_DIR/$IQN/tpgt_1/attrib/generate_node_acls
|
||||
|
||||
# Allow write access for non authenticated initiators
|
||||
echo 0 > $ISCSI_DIR/$IQN/tpgt_1/attrib/demo_mode_write_protect
|
||||
|
||||
echo "Target ${IQN}, portal ${PORTAL} has been created"
|
Loading…
Reference in a new issue