mongod --dbpath /data/db &

RET=1
while [[ RET -ne 0 ]]; do
    echo "=> Waiting for confirmation of MongoDB service startup"
    sleep 5
    mongo admin --eval "help" >/dev/null 2>&1
    RET=$?
done

ADMINUSER=rootUser
ADMINPASS=changeMe
DBUSER=opal
DBPASSWORD=opal

mongo admin --eval "db.createUser({user: '$ADMINUSER', pwd: '$ADMINPASS', roles:[{role:'root',db:'admin'}]});"

mongo opaldb --eval "db.createUser({user: '$DBUSER', pwd: '$DBPASSWORD', roles:[{role:'dbOwner',db:'opaldb'}]});"

mongod --shutdown