Deploy the easegress helm chart on Kubernetes

Question

Pulumi · Accepted Answer

To deploy the Easegress Helm chart on Kubernetes using Pulumi, you need to create a Pulumi program that uses the `Chart` resource from the Pulumi Kubernetes provider. Helm charts are a way to package applications for Kubernetes, and Pulumi can manage these applications directly using the Helm chart as a resource in your Pulumi code.

Here's a step-by-step explanation followed by a Pulumi TypeScript program that deploys the Easegress Helm chart:

1. **Setting up the Pulumi Program**: Start by creating a new directory, initializing a new Pulumi project, and installing necessary dependencies.
2. **Creating the Kubernetes Cluster**: You must have access to a Kubernetes cluster. For simplicity, this example assumes that you have already configured `kubectl` to point to your cluster.
3. **Adding Pulumi Kubernetes Provider**: This provider allows Pulumi to interact with Kubernetes resources.
4. **Defining the Helm Chart Resource**: You specify the Easegress Helm chart using the `Chart` resource. You can customize it by specifying `values` (which override default values in the chart), chart version, and release name.

Below is the TypeScript program for deploying the Easegress Helm chart on Kubernetes:

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

// Step 1: Create a new Chart resource. `kubernetes.helm.sh/v3.Chart` represents a Helm chart.
const easegressChart = new k8s.helm.sh.v3.Chart("easegress", {
    // Specify parameters for the Helm chart:
    chart: "easegress", // The name of the chart. Replace with the correct Helm chart name.
    version: "1.0.0", // The version of the chart. Replace with the desired version.
    fetchOpts: {
        repo: "https://helm_repo_url_here", // The repository URL where the chart is located. Replace with the actual URL.
    },
    // Define values to override the default chart values.
    values: {
        service: {
            type: "LoadBalancer",
        },
        // Add other values here as needed for customizing the Easegress deployment.
    },
}, {
    provider: k8sProvider, // Use `k8sProvider` if you are working with a specific Kubernetes provider instance.
});

// Export the public IP address of the LoadBalancer associated with the Easegress service.
export const easegressPublicIp = easegressChart.getResourceProperty("v1/Service", "easegress", "status")
    .then(status => status.loadBalancer.ingress[0].ip);

```

Please replace the `chart`, `version`, and `repo` fields with the actual values for the Easegress Helm chart you want to deploy. If it's publicly available on a well-known chart repository like Bitnami or stable Helm chart repos, you might not need to specify the `repo` field. You can also customize the `values` object with your configuration values that are specific to Easegress.

Once you have this code set up, run `pulumi up` from within the project directory to initiate the deployment. Pulumi will connect to your Kubernetes cluster using your already-configured `kubectl` context and deploy the chart. Once deployed, it will export the public IP address of the Easegress service if it was exposed as a LoadBalancer.

Feel free to add more custom configuration in the `values` field as per your requirements. Also, ensure that you have the correct access permissions to deploy resources to your Kubernetes cluster.