4.3.1 Create a repository

Create a repository where you’ll be storing the Docker images of your application. The repository is stored in the Artifact Registry, the Google container registry.

1. Create an environment variable PROJECT_NUMBER whose value is 124930651186.

2. Create an environment variable REPO_NAME whose value is a name of your choice for the container repository.

3. Create an environment variable APP_NAME whose value is a name of your choice for the application.

4. Create an environment variable APP_VERSION whose value is the version of the app. You can choose 1.0 or latest, or any other value of your choice.

5. Create your repository with the following command:

gcloud artifacts repositories create ${REPO_NAME} \
   --repository-format=docker \
   --location=europe-west2 \
   --description="Docker repository"

4.3.2 Building the Docker images

1. Download the application from your Git repository with the command git clone.

2. Build and tag the Docker images of your application.

3. Verify that the images have been created with the following command:

4. Add IAM policy bindings (basically, some authorization configurations) to your service account:

gcloud artifacts repositories add-iam-policy-binding ${REPO_NAME} \
    --location=europe-west2 \
    --member=serviceAccount:${PROJECT_NUMBER}-compute@developer.gserviceaccount.com \
    --role="roles/artifactregistry.reader"

4.3.3 Pushing the images to the Artifact registry

You must upload the images to a registry so that your GKE cluster can download and run the images. Here we use the repository that we created above.

1. Configure the docker command to authenticate to the Artifact Registry.

2. Push the images that you created with the command docker push. Make sure that you use the correct image names, as discussed above.

4.3.4 Creating a GKE cluster

You need now to create a Kubernetes cluster using the Google Kubernetes Engine. When you create a cluster, you’ll also specify the option to create the network over which the cluster nodes communicate.

1. Define a new environment variable CLUSTER_NAME whose value is a name of your choice for the cluster.

2. Define a new environment variable NET_NAME whose value is a name of your choice for the network.

3. Set your compute engine region.

4. Create the cluster with the following command:

gcloud container clusters create-auto ${CLUSTER_NAME} \
  --create-subnetwork name=${NET_NAME} \
  --no-enable-master-authorized-networks \
  --enable-private-nodes

4.3.5 Deploy the application

You’re now ready to deploy your application!

1. In your GitHub repository, modify the file tripmeal.yml to change the names of the images. Use the names of the images that you pushed to the the artifact registry.

2. In the Google Cloud Shell, move to the directory that contains your application with the command cd.

3. Execute the command git pull to get the updated version of file tripmeal.yml.

4. Ensure that you are connected to your GKE cluster with the following command:

5. Type the following command to deploy your application:

6. Wait 30 seconds and then type the following command:

You should get some information about the state of the deployment. Keep typing this command until the state of all pods is READY.

7. Get the public IP address where your application is available and the port number and type them in your browser to confirm that you can access and use the application.