Coordinating releases to multiple GCP regions with Cloud Deploy

Question

Pulumi · Accepted Answer

Coordinating releases across multiple Google Cloud Platform (GCP) regions with Cloud Deploy involves setting up a repeatable and automated deployment process. We'll use Pulumi to define and deploy a Google Cloud Deploy pipeline that can handle multi-region deployments. The Cloud Deploy pipeline consists of stages that represent the sequence in which deployments are made to different targets, such as GCP regions.

To get started, we need to define several Pulumi resources:

1. **Google Cloud Deploy Delivery Pipeline**: This represents the sequence of stages that our software goes through on its way to deployment.

2. **Google Cloud Deploy Target**: Multiple targets will be created, one for each GCP region where we want to deploy our application.

In this Pulumi program, we'll create a delivery pipeline with two targets (for the sake of this example, let's use `us-central1` and `europe-west1` as our regions).

Now let's go through the program which creates a Google Cloud Deploy Delivery Pipeline and Targets using Pulumi with TypeScript:

```typescript
import * as gcp from "@pulumi/gcp";
import * as pulumi from "@pulumi/pulumi";

// Create the GCP Cloud Deploy target for the us-central1 region.
const targetUsCentral1 = new gcp.clouddeploy.Target("targetUsCentral1", {
  location: "us-central1",
  targetId: "us-central1-target",
  // Additional configuration specific to the target can be added here.
  // E.g., if deploying to GKE clusters, GKE target specifics would be defined.
});

// Create the GCP Cloud Deploy target for the europe-west1 region.
const targetEuropeWest1 = new gcp.clouddeploy.Target("targetEuropeWest1", {
  location: "europe-west1",
  targetId: "europe-west1-target",
  // Similarly, add configurations for this specific target.
});

// Create the GCP Cloud Deploy delivery pipeline which uses the multiple targets defined above.
const deliveryPipeline = new gcp.clouddeploy.DeliveryPipeline("deliveryPipeline", {
  location: "us-central1",
  serialPipeline: {
    stages: [
      {
        // The first stage deploying to us-central1
        targetId: targetUsCentral1.name,
      },
      {
        // The second stage deploying to europe-west1
        targetId: targetEuropeWest1.name,
      },
    ],
  },
  // Other configurations like labels, annotations can be added here.
});

// Export the Delivery Pipeline and Target names
export const deliveryPipelineName = deliveryPipeline.name;
export const targetUsCentral1Name = targetUsCentral1.targetId;
export const targetEuropeWest1Name = targetEuropeWest1.targetId;
```

In this program, we create two `Target` resources – one for the `us-central1` region and another for the `europe-west1` region. These targets serve as destinations for our deployments. We then create a `DeliveryPipeline` resource that references these targets in a sequence. During the execution of the delivery pipeline, deployments will occur in the order they are listed under the `serialPipeline.stages` property.

To run this Pulumi program, you would need to have the Pulumi CLI installed and configured with access to your GCP account. You can then use Pulumi's standard CLI commands (`pulumi up`) to deploy this configuration to your GCP account. Each run will provide you with details on what resources will be created, updated, or deleted.

Remember that the above code is the infrastructure management part. The actual application deployment and other operational specifics (like specifying Docker images, Kubernetes manifests, or GCP Functions source code) depend on the resources you target and must be defined accordingly.