Deploy the docker-config-secret helm chart on Kubernetes

Question

Pulumi · Accepted Answer

To deploy a Helm chart on a Kubernetes cluster using Pulumi, you'll typically need to use the `@pulumi/kubernetes` package which provides resources to interact with Kubernetes, including Helm charts. The `Chart` resource can be used to deploy Helm charts in a Kubernetes cluster.

First, add the necessary Pulumi package for Kubernetes by running:

```bash
pulumi package install kubernetes
```

Below, I'm providing you with a Pulumi program in TypeScript that deploys a Helm chart named `docker-config-secret` into a Kubernetes cluster. This program assumes that you already have a Kubernetes cluster running and properly configured with `kubectl`, as well as Pulumi set up to manage your resources.

The `Chart` resource is responsible for deploying a Helm chart. In the program, we'll specify the chart name and other optional parameters such as the values that configure the chart, the version, and the namespace where the chart should be deployed.

Here's the TypeScript program that deploys the Helm chart:

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

const ns = new k8s.core.v1.Namespace("test-namespace", {
    metadata: { name: "test-namespace" }
});

// Deploy the `docker-config-secret` Helm chart into the `test-namespace` namespace.
const chart = new k8s.helm.v3.Chart("docker-config-secret-chart", {
    chart: "docker-config-secret",
    // The 'version' parameter is optional; specify it to pin the chart version you wish to deploy.
    version: "1.0.0",
    // If the chart you're deploying isn't in the default repo, you can specify the repository with the 'repo' option.
    // For example: repo: "https://charts.example.com/",
    namespace: ns.metadata.name,
    // The 'values' parameter is optional and allows you to provide a set of values to customize the deployment.
    values: {
        // Custom options related to 'docker-config-secret' should go here, for example:
        // image: "nginx:1.17.4",
        // replicaCount: 2,
    },
    // If the chart requires some specific fetch options, you could specify with the 'fetchOpts' option.
    // fetchOpts: {
    //     repo: "https://charts.example.com/",
    // },
}, { dependsOn: [ns] });

// Export the resources' name of the deployed Helm chart
export const chartName = chart.metadata.name;
```

Your Pulumi program starts by importing the Pulumi Kubernetes package. We create a Kubernetes `Namespace` object where your Helm chart will be deployed—although this is optional, it's often a good practice to organize resources.

We then declare a `Chart` resource, providing the necessary parameters:

- `chart`: the name of the Helm chart you want to deploy.
- `version`: the specific version of the Helm chart to deploy.
- `namespace`: the Kubernetes namespace to which the Helm chart will be deployed.
- `values`: any configuration values for the Helm chart. These values override the defaults provided by the Helm chart and are typically used to customize the chart to your specific needs.
- `fetchOpts` (optional): contains options to customize the Helm chart fetching if needed, such as providing a custom repository.

Keep in mind that the above `values` and `fetchOpts` are placeholders; you would replace these with the actual configuration specific to the `docker-config-secret` Helm chart you want to deploy.

Finally, we export `chartName`, which will allow you to easily retrieve the name of the Helm chart resource that has been deployed.

Remember, you have to ensure that Pulumi has access to your Kubernetes cluster configuration, usually by setting the `KUBECONFIG` environment variable to point to your cluster's configuration file or by ensuring that the active context of `kubectl` is set to the desired cluster.