gcloudcomputeengine

Google Cloud Compute Engine VM instances Java example

This folder contains a Java application example that handles Compute Engine VM instances on Google Cloud Platform (GCP).

Requirements

• You must have a Google Cloud Platform (GCP) account.

• You can install and use the Google Cloud SDK.

  The Google Cloud SDK is a set of tools for Google Cloud Platform. It contains gcloud, gsutil, and bq, which you can use to access Google Compute Engine, Google Cloud Storage, Google BigQuery, and other products and services from the command line. You can run these tools interactively or in your automated scripts.

• The code was written for:

  • Java 8
  • Apache Maven 3
  • Google Cloud Client Library for Java

• This example uses the Google Cloud Client Library for Java.

  The Google Cloud Client Library for Java is the idiomatic way for Java developers to integrate with Google Cloud Platform services, like Cloud Datastore and Cloud Storage. You can install the package for an individual API using Maven, Gradle, SBT, etc.

Using the code

• Configure your Google Cloud access keys.

  The Google Cloud client library for Java allows you to use several authentication schemes.

  The application uses Application Default Credentials through a JSON service account key for authenticating.

  The credentials are taken from GOOGLE_APPLICATION_CREDENTIALS environment variable.

  For example:

  GOOGLE_APPLICATION_CREDENTIALS = /path/to/my/key.json

  Use the Google Cloud Platform console:

  • Go to the Google Cloud Project.

  • Prepare the credentials:

    • Create a Service account.

      For example:

      Name: gcloud-java-examples
      Role: Owner
      Email: gcloud-java-examples@gcloud-java-examples.iam.gserviceaccount.com

    • Create a key as a JSON file and download it.

    • Add the Service accounts id (Ex.: gcloud-java-examples@gcloud-java-examples.iam.gserviceaccount.com) as a member of the project in the IAM.

  • Set the GOOGLE_APPLICATION_CREDENTIALS environment variable in your Operating System with the path of your JSON service account key file.

• You can select the GCP Region changing the value of REGION_NAME variable and the GCP Zone changing the value of ZONE_NAME variable in the code.

• Run the code.

  Run application:

  java -jar gcloudcomputeengine.jar

  You can select an option in the menu in order to run every command:

  • 1 = List all VM instances
  • 2 = Create VM instance
  • 3 = List VM instance
  • 4 = Start VM instance
  • 5 = Stop VM instance
  • 6 = Reset VM instance
  • 7 = Delete VM instance

• Test the application.

  You should see the new VM instance and modification of states with the Google Cloud console.