Simple MongoDB Setup Script for Ubuntu 18.04

mongodb-setup.sh

#!/bin/bash

#
# MongoDB script
#

# Pre-req: Ubuntu Bionic (18.04) flavored distro
# Note:  To expose your server to the network, set bind to 0.0.0.0 in /etc/mongod.conf
#
# Recommended for first time users:  create a VM, ssh into it, 'wget' the raw version of this gist.
  
if [ -f /usr/bin/mongod ]; then
  echo "MongoDB is installed on your machine."
else
  echo "********************* MongoDB 4.0 INSTALL **************************"
  echo "MongoDB is is not installed."
  echo "You will be prompted several time for input during the install."
  echo "******************************************************************"
  
  wget -qO- https://www.mongodb.org/static/pgp/server-4.2.asc | sudo bash -c "apt-key add"
  
  sudo bash -c "echo deb http://repo.mongodb.org/apt/ubuntu bionic/mongodb-org/4.2 multiverse > /etc/apt/sources.list.d/mongodb-org.list"
  sudo bash -c "apt update && apt upgrade -y"
  sudo bash -c "apt install mongodb-org -y"

  sudo bash -c "apt update && apt upgrade -y"
  sudo bash -c "apt autoremove && apt clean"
      
  sudo bash -c "ufw allow proto tcp from any to any port 27017" #recommend 'from any' to local network range
  sudo bash -c "ufw enable"  
  
  sudo bash -c "rm /var/lib/mongodb/mongod.lock"
  sudo bash -c "chown -R mongodb:mongodb /var/lib/mongodb"
  sudo bash -c "chown mongodb:mongodb /tmp/mongodb-27017.sock"
  
  #sudo bash -c "sudo systemctl unmask mongodb && systemctl enable mongod"  #enables Mongo on system startup
  sudo bash -c "service mongod start"
  
  # if service didn't start, delete entire /var/lib/mongodb folder, recreate, re-set permissions (see above) and try starting service again.

  echo "Username for your Mongo DB admin account (DONOT use ampersands -> @)?"
  read mongo_admin_user
  
  echo "What is the password you want to set for $mongo_admin_user (DONOT use ampersands -> @)?"
  read mongo_admin_pwd 
  
  echo "User name will be set to $mongo_admin_user and password to $mongo_admin_pwd."
  
  mongo "admin" --eval "db.createUser({'user':'$mongo_admin_user','pwd':'$mongo_admin_pwd','roles': ['userAdminAnyDatabase','readWriteAnyDatabase']})"  
  
  sudo bash -c "echo ' ' >> /etc/mongod.conf"
  sudo bash -c "echo 'security:' >> /etc/mongod.conf"
  sudo bash -c "echo '  authorization: enabled' >> /etc/mongod.conf"    
  
  sudo bash -c "service mongod restart"

  #this is just a sanity check to ensure everything worked
  mongo "yourproject-com" -u $mongo_admin_user -p --authenticationDatabase admin --eval "db.createCollection('dummy')"
  mongo -u $mongo_admin_user -p --authenticationDatabase admin --eval "db.createUser({'user':'yourproject-web-user','pwd':'passw0rd123','roles':[{'role':'dbOwner','db':'yourproject-com'}]})"
fi

echo "Script complete."

I'll work on some input validation for this later.

This is just a sanity