Getting ready

The following are the initial setup verification steps to be taken before the recipe can be executed:

1. Create or select a GCP project.
2. Enable billing and enable the default APIs (some APIs such as BigQuery, storage, monitoring, and a few others are enabled automatically).
3. Verify that Google Cloud SDK is installed on your development machine.
4. Verify that the default project is set properly:

$ gcloud config list 

5. The VM which runs MongoDB from our first recipe allows connections only from the localhost. We'll have to modify the configuration to allow connections from the external world.
6. SSH into the VM from the Console:

7. Navigate to the MongoDB's configuration file, /etc/mongod.conf, and update the bindIp value to include 0.0.0.0:

   # network interfaces
    net:
      port: 27017
      bindIp: [127.0.0.1,0.0.0.0] 

8. Reboot the machine and verify that the MongoDB service is up and running.
9. We'll also create a new firewall rule to allow access to port 27017 from anywhere:

$ gcloud compute firewall-rules \
create default-allow-mongo-27017 \
--allow tcp:27017 \
--source-ranges 0.0.0.0/0 \
--target-tags mysite-server \
--description "Allow port 27017 access to mysite-server"

The following screenshot shows the details of the firewall rule:

The MongoDB instance is now open to the world without any login credentials. So for production systems, make sure you secure the MongoDB instance with an admin user and run the mongod process using the --auth option.

10. Connect to the MongoDB instance running on the VM from your development machine:

$ mongo mongodb://<External IP>:27017