Deploy the envoy helm chart on Opensshift

Question

Pulumi · Accepted Answer

To deploy the Envoy helm chart on OpenShift using Pulumi, you'll need to perform several steps:

1. Ensure you have the correct environment setup: Install Pulumi, authenticate with your cloud provider (in this case, the OpenShift cluster), and set up `kubectl` to interact with the cluster.

2. Create a new Pulumi project or use an existing one: This project will contain the code and configurations for your infrastructure as code.

3. Write the TypeScript code to deploy the Helm chart: You will use Pulumi's Kubernetes package to interact with the OpenShift cluster and install the helm chart.

Here's a detailed explanation of the Pulumi code structure and how you can use it to deploy the Envoy helm chart onto an OpenShift cluster:

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

// OpenShift clusters usually require administrative permissions to create certain
// resources. Ensure you have the necessary permissions before proceeding.

// Create an instance of the Kubernetes provider connected to the OpenShift cluster.
// If you've configured `kubectl` to interact with your OpenShift cluster, Pulumi
// will use the current context by default.
const openshiftProvider = new k8s.Provider("openshift", {
  // You can specify kubeconfig path explicitly; otherwise, it uses the default config.
  // kubeconfig: <path-to-your-kubeconfig>,
});

// Deploy Envoy using the Helm Chart.
const envoyChart = new k8s.helm.v3.Chart("envoy", {
  // Specify the Helm chart repository and the chart name.
  chart: "envoy",
  // Make sure to replace with your actual repository, Helm chart name, and version.
  // Also provide the chart version to ensure reproducibility.
  version: "1.18.3",
  // Namespace where the chart will be installed.
  namespace: "envoy-namespace",
  // OpenShift-specific configurations can be included here.
  // Use `values` to provide configuration parameters for the helm chart.
  values: {
    // List of configurations specific to the Envoy chart.
    // Refer to the chart's values.yaml file or documentation for details.
    service: {
      type: "ClusterIP", // Use "LoadBalancer" or "ClusterIP" depending on your needs.
    },
    adminAccess: {
      logLevel: "debug", // Adjust log level as needed.
    },
    // ...other chart values.
  },
}, { provider: openshiftProvider }); // Pass the OpenShift provider instance.

// Optionally, you can export the cluster IP to access the Envoy service.
export const envoyClusterIp = envoyChart.getResourceProperty("v1/Service", "envoy", "spec").apply(spec => spec.clusterIP);

// To run this program, execute `pulumi up` from the command line. Make sure to
// preview the changes and confirm the deployment. Pulumi will then provision the
// resources according to your code.
```

Please note that you'll need to replace placeholder values with real configurations specific to your environment, like the helm chart details, version, and the desired state for Envoy configurations. Check the Envoy chart's `values.yaml` file or its Helm repository for the configurable parameters.

Pulumi relies on existing tools like `kubectl` to manage your Kubernetes resources, in this case, your OpenShift cluster. It programmatically calls such tools to apply the desired state you describe in your program to the cluster. After the program is executed using `pulumi up`, Pulumi creates an instance of the designated Helm chart in OpenShift, yielding a running Envoy service.

Remember that Pulumi tracks the state of your infrastructure, so you can modify this program later to update your Envoy deployment, and Pulumi will compute and apply the minimal set of changes necessary.