[ SEA-GHOST MINI SHELL]

#! /bin/bash

NODES=''
DISK=`ls -lpat /dev/disk/by-path/`
COUNT=0

while read line;
do
  node=`echo $line | awk '{ print $2 }'`
  target=`echo $line | awk '{ print $1 }' | awk -F':' '{print $1}'`
  if [[ $DISK != *$node* ]]; then
    NODES+="$target: "
    NODES+=`echo $node | awk -F'-' '{print $3"-"$4"; "}'`
    ((COUNT+=1))
  fi
done < <(iscsiadm -m node)


#Return status
if [ -n "$NODES" ]; then
  echo "WARNING: $COUNT iSCSI nodes not in use: $NODES"
else
  echo "OK: All iSCSI nodes are in use"
fi