Shell script to log in to multiple iSCSI targets, e.g. on an AWS Storage Gateway

iscsi-multi-chap.sh

#!/bin/bash
# Adapted for Debian from
# http://backdrift.org/how-to-connect-to-multiple-iscsi-targets-requiring-different-usernames-and-passwords

# Set $InitiatorName
. /etc/iscsi/initiatorname.iscsi

# Storage Gateway IP
PORTAL=172.31.2.56

USERNAME[0]="iqn.1997-05.com.amazon:vdev-a"
PASSWORD1[0]=abcd123
PASSWORD2[0]=efgh456

USERNAME[1]="iqn.1997-05.com.amazon:vdev-b"
PASSWORD1[1]=ijkl789
PASSWORD2[1]=mnop012

USERNAME[2]="iqn.1997-05.com.amazon:vdev-c"
PASSWORD1[2]=qrst345
PASSWORD2[2]=uvwx678

# Perform discovery (note -o new argument, this is important)
TARGETS=(`iscsiadm -m discovery -t st -p ${PORTAL} -o new --discover | sort | awk '{print $2}'`)

i=0
while [ $i -lt ${#TARGETS[@]} ]; do
  # Set username/password individually for each target, and login
  iscsiadm -m node --targetname ${TARGETS[$i]} -p ${PORTAL} -o update -n node.session.auth.username -v ${InitiatorName}
  iscsiadm -m node --targetname ${TARGETS[$i]} -p ${PORTAL} -o update -n node.session.auth.password -v ${PASSWORD1[$i]}

  iscsiadm -m node --targetname ${TARGETS[$i]} -p ${PORTAL} -o update -n node.session.auth.username_in -v ${USERNAME[$i]}
  iscsiadm -m node --targetname ${TARGETS[$i]} -p ${PORTAL} -o update -n node.session.auth.password_in -v ${PASSWORD2[$i]}
  iscsiadm -m node --targetname ${TARGETS[$i]} -p ${PORTAL} --login

  # Log out of target
  iscsiadm -m node --targetname ${TARGETS[$i]} --logout

 i=$((i+1))
done

# Log in to all nodes now
echo Logging in to all nodes
iscsiadm -m node --login