Deploy the mod-permissions helm chart on Opensshift

Question

Pulumi · Accepted Answer

To deploy the `mod-permissions` Helm chart on an OpenShift cluster, you will use Pulumi's Kubernetes provider to create a Helm Release. Here's how the entire process works with Pulumi and TypeScript:

1. **Set up the required dependencies**: You will need to have Node.js, Pulumi CLI, and `kubectl` configured to connect to your OpenShift cluster.

2. **Create a new Pulumi project**: This will establish the infrastructure-as-code environment in which you will define your deployment.

3. **Define the Helm Release**: In your Pulumi program, you will specify the `mod-permissions` Helm chart along with any necessary configuration parameters.

4. **Deploy**: Run `pulumi up` to preview and deploy your changes.

5. **Access and Manage**: Once the Helm chart is deployed, you can manage it through Pulumi or interact with the deployed application as you normally would through OpenShift's tooling.

Below is a Pulumi TypeScript program which accomplishes this:

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

// The namespace where you want to deploy your Helm chart, adjust if necessary
const namespace = "mod-permissions-namespace";

// Create a Kubernetes Namespace
const ns = new kubernetes.core.v1.Namespace(namespace, {
    metadata: {
        name: namespace,
    },
});

// Define the Helm Chart
const helmChart = new kubernetes.helm.v3.Chart("mod-permissions", {
    namespace: namespace,
    repo: "your-repo", // Specify your Helm repository name here
    chart: "mod-permissions",
    // You can specify the version of the chart here, if needed
    // version: "1.0.0",
    // Any additional value overrides would be specified here, for example:
    // values: {
    //     key: "value",
    // },
}, { dependsOn: [ns] });

// Export the name of the namespace
export const namespaceName = ns.metadata.name;
```

Here's a step-by-step explanation of the code:

- We import the necessary Kubernetes package from Pulumi's library.
- We define a namespace that our Helm chart will be deployed into. This helps isolate our application within the cluster.
- We create a Pulumi Kubernetes Namespace resource to ensure that the namespace exists on our cluster.
- Then, we define a Pulumi Kubernetes Helm Chart resource. This essentially represents a Helm chart and tells Pulumi where to find it (`repo`), which chart to use (`chart`), and any configurations (`values`) that need to be applied.
- The `dependsOn` option is used to explicitly specify dependencies between resources, ensuring that the namespace is created before attempting to deploy the Helm chart into it.
- In the end, we export the namespace so you can easily retrieve its name after deployment from the Pulumi stack outputs.

To run this Pulumi program:

1. Save the program in a file named `index.ts`.
2. Run `pulumi stack init` to create a new stack.
3. Run `pulumi up` to preview and deploy the changes. If the command line prompts to install any missing plugins, confirm the installation.

Please replace `"your-repo"` with the actual Helm repository name where the `mod-permissions` chart is hosted. The `values` parameter within the `helmChart` definition is where you can specify custom values to configure the `mod-permissions` Helm chart according to your needs.

Keep in mind that the code provided assumes you have a running OpenShift cluster and have configured Pulumi to manage resources in that cluster. If you do not have a cluster or Pulumi configured, you will need to set those up first.