Install and configure MongoDB community edition

Perform these steps on the Amazon EC2 instance that you launched in Launch an Amazon EC2 instance.

1. Go to Install MongoDB community edition on Amazon Linux in the MongoDB documentation and follow the instructions there.

2. By default, the MongoDB server (mongod) only allows loopback connections from IP address 127.0.0.1 (localhost). To allow connections from elsewhere in your Amazon VPC, do the following:

   1. Edit the /etc/mongod.conf file and look for the following lines.

      # network interfaces
      net:
        port: 27017
        bindIp: 127.0.0.1  # Enter 0.0.0.0,:: to bind to all IPv4 and IPv6 addresses or, alternatively, use the net.bindIpAll setting.

   2. Modify the bindIp line so that it looks like the following.

        bindIp: public-dns-name

   3. Replace public-dns-name with the actual public DNS name for your instance, for example ec2-11-22-33-44.us-west-2.compute.amazonaws.com.

   4. Save the /etc/mongod.conf file, and then restart mongod.

      sudo service mongod restart

3. Populate your MongoDB instance with data by doing the following:

   1. Use the wget command to download a JSON file containing sample data.

      wget http://media.mongodb.org/zips.json

   2. Use the mongoimport command to import the data into a new database (zips-db).

      mongoimport --host public-dns-name:27017 --db zips-db --file zips.json

   3. After the import completes, use the mongo shell to connect to MongoDB and verify that the data was loaded successfully.

      mongo --host public-dns-name:27017

   4. Replace public-dns-name with the actual public DNS name for your instance.

   5. At the mongo shell prompt, enter the following commands.

      use zips-db
      
      db.zips.count()
      
      db.zips.aggregate( [
         { $group: { _id: { state: "$state", city: "$city" }, pop: { $sum: "$pop" } } },
         { $group: { _id: "$_id.state", avgCityPop: { $avg: "$pop" } } }
      ] )

      The output should display the following:

      • The name of the database (zips-db)

      • The number of documents in the zips collection (29353)

      • The average population for cities in each state

   6. Exit from the mongo shell and return to the command prompt by using the following command.

      exit