Deploy the sync-qcloud-cdn-cert helm chart on Kubernetes

Question

Pulumi · Accepted Answer

Deploying a Helm chart with Pulumi involves using the `Chart` resource from Pulumi's Kubernetes package. Here, we are going to create a Pulumi program in TypeScript which deploys the `sync-qcloud-cdn-cert` helm chart to a Kubernetes cluster. We assume you have already set up a Kubernetes cluster and have the `kubeconfig` file available for Pulumi to interact with your cluster.

To start, you will need to install the Pulumi CLI and the required NPM packages:

```bash
npm install @pulumi/kubernetes
```

Make sure to log in to Pulumi before running the program:

```bash
pulumi login
```

Now let's write the Pulumi program that deploys the Helm chart:

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

// We will create a new Helm Chart resource. Pulumi will install the Helm chart in the default
// namespace of the Kubernetes cluster that your `kubeconfig` points to.

// Replace `repoUrl` with the actual repository URL where the Helm chart is located
const repoUrl = "https://charts.example.com/";

const cdnCertChart = new k8s.helm.v3.Chart("sync-qcloud-cdn-cert", {
    chart: "sync-qcloud-cdn-cert", // The name of the chart to deploy
    // Here you should set the repository where your Helm chart is hosted
    fetchOpts: {
        repo: repoUrl,
    },
    // You can specify additional configuration options for the chart here.
    // For example, you can set values corresponding to the chart's `values.yaml` file.
    // Suppose the chart accepts a `certFilePath` value to specify a custom cert path.
    // we'd set that like this (the `values` field below is illustrative, adjust as per the actual chart):
    values: {
        certFilePath: "/path/to/cert",
        // Add other configuration values here
    },
    // If your chart requires a specific namespace, or you want to deploy it in a particular namespace,
    // specify the `namespace` field. By default, Pulumi uses the `default` namespace.
    // If you need to create a new namespace you can do so using k8s.core.v1.Namespace resource separately.
    namespace: "default",
});

// When you run `pulumi up`, Pulumi will install the Helm chart onto your Kubernetes cluster
```

To execute this Pulumi program, you would typically run the following commands:
1. `pulumi stack init` to create a new stack for your project if you haven't already.
2. `pulumi up` to stand up your infrastructure according to the Pulumi program you've written.

Key Points:
- The program imports the Pulumi Kubernetes SDK for TypeScript.
- We instantiate a `Chart` resource with configurations specific to our `sync-qcloud-cdn-cert` needs.
- The `chart` field is the name of the Helm chart, and `fetchOpts.repo` should be the URL of the Helm repository where your chart exists.
- The `values` object is equivalent to customizing your Helm chart's `values.yaml` file. You specify the specific configuration needed for your setup there.
- We use the `default` namespace for deployment, but this can be changed based on your requirements.
- Make sure to replace the placeholder values such as `repoUrl`, `certFilePath`, and any other values with the appropriate values for your use case.

Remember that Helm charts and Kubernetes have many nuances and there's a lot that can be customized, so be sure to refer to the documentation of the specific helm chart for more details. You can always consult the Pulumi and the Kubernetes documentation for deeper insight into how these tools work.