initialize mongo with replication set

bootstrap.sh

DEFAULT_VOLUME_PATH=~/mongo/data
CONTAINER_NAME=some-mongo

runMongoContainer()
{
  VOLUME=$1
  docker run --name $CONTAINER_NAME -v $VOLUME:/data/bs -p 27017:27017 -d mongo --replSet rs0
  ####################################################################### NOTICE --replSet
}

executeCommandOnShell()
{
  docker exec -it $CONTAINER_NAME mongo admin --eval "$1"
}

notifyImageDownloading()
{
  if [ -z $(docker images -q mongo) ]; then
    echo ""
    echo "Mongo image not yet installed, will install now..."
    echo "This might take a few minutes!"
    echo ""
  fi
}

main()
{
  VOLUME_PATH=$DEFAULT_VOLUME_PATH
  if [[ $# -gt 0 ]]; then VOLUME_PATH=$1; fi

  echo ""
  echo "--- Running mongo container ---"
  notifyImageDownloading
  echo ""
  runMongoContainer $VOLUME_PATH
  sleep 1s

  echo "--- Initiating replication set ---"
  echo ""
  executeCommandOnShell "rs.initiate()"
  ######################## Initialize replica set
  sleep 2s

  echo "--- Creating admin user ---"
  echo ""
  executeCommandOnShell "db.createUser({user: 'root', pwd: 'root', roles: [{role: 'userAdminAnyDatabase', db: 'admin'}]})" # IMPORTANT
  ##################### Create a user

  echo ""
  echo "You're good to go!"
  echo "Make sure you .env file has the following settings set:"
  echo "DATABASE_URL=mongodb://root:root@localhost:27017/"
  echo "DATABASE_NAME=admin"
}

if [ "$1" == "--help" ]; then
  echo ""
  echo "Usage: bootstrap.sh <optional path for volume>"
  echo ""
  echo "Default volume path is: '$DEFAULT_VOLUME_PATH'"
  echo ""
  echo "Stop/start container:"
  echo "  docker stop/start $CONTAINER_NAME"
  echo ""
  echo "Delete the container:"
  echo "  docker rm $CONTAINER_NAME"
  exit 0
fi

main $@