Deploy the postgresql-backup-to-minio helm chart on Google Kubernetes Engine (GKE)

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Pulumi · Accepted Answer

Deploying the `postgresql-backup-to-minio` Helm chart on Google Kubernetes Engine (GKE) involves several steps with Pulumi:

1. Provision a GKE cluster: Using Pulumi's GCP package, you'll create a GKE cluster where your applications will run.
2. Set up MinIO: You might provision a MinIO instance, which is an open-source high performance object storage service compatible with Amazon S3, where PostgreSQL backups will be stored.
3. Deploy the Helm chart: You'll need to configure and deploy the `postgresql-backup-to-minio` Helm chart to your GKE cluster.

Below is a Pulumi program in TypeScript that outlines creating a GKE cluster and deploying the Helm chart for PostgreSQL backup to MinIO. Please ensure you have Pulumi and `kubectl` installed, and have set up the GKE configuration for `kubectl`.

```typescript
import * as pulumi from '@pulumi/pulumi';
import * as gcp from '@pulumi/gcp';
import * as k8s from '@pulumi/kubernetes';

// Create a GKE cluster
const cluster = new gcp.container.Cluster('gke-cluster', {
    // Depending on your requirements you can modify the configuration here,
    // like changing the machineType, initialNodeCount, or other GKE settings.
    initialNodeCount: 2,
    minMasterVersion: 'latest',
    nodeVersion: 'latest',
    nodeConfig: {
        machineType: 'n1-standard-1',
        oauthScopes: [
            'https://www.googleapis.com/auth/compute',
            'https://www.googleapis.com/auth/devstorage.read_only',
            'https://www.googleapis.com/auth/logging.write',
            'https://www.googleapis.com/auth/monitoring'
        ],
    },
});

// Export the Cluster name
export const clusterName = cluster.name;

// Once the cluster is created, we can configure kubectl using the cluster credentials.
const kubeconfig = pulumi.
    all([cluster.name, cluster.endpoint, cluster.masterAuth]).
    apply(([name, endpoint, masterAuth]) => {
        const context = `${gcp.config.project}_${gcp.config.zone}_${name}`;
        return `apiVersion: v1
clusters:
- cluster:
    certificate-authority-data: ${masterAuth.clusterCaCertificate}
    server: https://${endpoint}
  name: ${context}
contexts:
- context:
    cluster: ${context}
    user: ${context}
  name: ${context}
current-context: ${context}
kind: Config
preferences: {}
users:
- name: ${context}
  user:
    auth-provider:
      config:
        cmd-args: config config-helper --format=json
        cmd-path: gcloud
        expiry-key: '{.credential.token_expiry}'
        token-key: '{.credential.access_token}'
      name: gcp
`;
    });

// Export the Kubeconfig
export const kubeConfigOutput = kubeconfig;

// Create a Kubernetes provider instance that uses our cluster from above.
const k8sProvider = new k8s.Provider('k8s-provider', {
    kubeconfig: kubeconfig,
});

// Now we have a K8s provider with the GKE cluster, we can deploy our PostgreSQL backup to a MinIO instance using a Helm chart.
// Note: You'll need to have your MinIO information, like the service endpoint and the secret key details.

const postgresqlBackupChart = new k8s.helm.v3.Chart('postgresql-backup-to-minio', {
    chart: 'postgresql-backup-to-minio',
    // You'll need to specify the correct repository containing the 'postgresql-backup-to-minio' chart.
    // This is just a placeholder to indicate where you'd specify the Helm chart repo.
    fetchOpts: {
        repo: 'https://charts.your-repo.com/',
    },
    // Define the values for the Helm chart.
    values: {
        // Here, you set configuration that includes MinIO credentials
        // and backup schedule, alongside other chart values.
        minio: {
            endpoint: 'MINIO-ENDPOINT',  // Replace with your MinIO endpoint
            bucket: 'postgresql-backup',
            accessKey: 'MINIO-ACCESS-KEY',  // Replace with your MinIO access key
            secretKey: 'MINIO-SECRET-KEY',  // Replace with your MinIO secret key
        },
        schedule: '*/5 * * * *',  // Runs every 5 minutes, adjust to your preference
    },
}, { provider: k8sProvider });

// Export the status of the Helm chart deployment.
export const helmChartStatus = postgresqlBackupChart.status;
```

Explanation:
1. We begin by importing the necessary Pulumi libraries for Google Cloud Platform (GCP) and Kubernetes.
2. We create a new GKE cluster with a default configuration, which can be customized to suit your needs.
3. We export the cluster name for later use or reference.
4. We generate kubeconfig, which is required for configuring `kubectl` command-line tool to communicate with our new GKE cluster.
5. We create a provider for Kubernetes that uses the `kubeconfig` we generated from the newly created GKE cluster.
6. Finally, we deploy the `postgresql-backup-to-minio` Helm chart, configuring it with MinIO credentials and backup schedule. The MinIO information must be replaced with your real endpoint and credentials.
7. We also export the status of the Helm chart deployment so that you can check if the deployment was successful.

Please ensure you replace the placeholder chart repository and MinIO information with your actual details before running this program. To execute this Pulumi program:
- Install Pulumi CLI and authenticate with your Google Cloud account.
- Create a new Pulumi project and replace the code in `index.ts` with the program above.
- Run `pulumi up` to preview and deploy the resources.

Remember to ensure your Pulumi CLI is correctly set up with Google Cloud access and that you have permission to create resources in the desired project and zone.