Deploy the mod-graphql helm chart on Rancher

Question

Pulumi · Accepted Answer

Deploying a Helm chart on a Rancher-managed Kubernetes cluster using Pulumi involves the following steps:

1. **Setting Up Pulumi**: Before you begin, make sure you have Pulumi installed and configured with your cloud provider(s) credentials. In this case, you would also need access to a Rancher instance where you can manage your Kubernetes clusters.

2. **Install Rancher2 Pulumi Provider**: The `rancher2` provider is a plugin for Pulumi that allows for full management of Rancher resources. You'll need to add this provider to your Pulumi project.

3. **Define Cluster and Namespace**: Identify the Rancher-managed Kubernetes cluster where you want to deploy the Helm chart and define the specific namespace for the deployment. If the namespace does not exist, you can create it as part of your Pulumi stack.

4. **Define Helm Release**: Use the `rancher2.HelmChart` resource to define the Helm release. You'll specify the chart name (`mod-graphql` in your case), the repository URL if it's a custom Helm repository, and any values overrides required for your deployment.

Let's go through the code for deploying the `mod-graphql` Helm chart on a Rancher-managed cluster. This is a high-level example and assumes that you have access to a Rancher environment and permissions to deploy Helm charts:

```typescript
import * as pulumi from "@pulumi/pulumi";
import * as rancher2 from "@pulumi/rancher2";

const projectName = "my-project"; // Replace with your Rancher Project Name
const clusterId = "my-cluster-id"; // Replace with your Cluster ID
const helmChartName = "mod-graphql";
const helmChartVersion = "1.0.0"; // Replace with your desired chart version
const namespaceName = "mod-graphql-namespace";

// Initialize a Pulumi project using the Rancher2 provider
const provider = new rancher2.Provider("my-provider", {
    apiUrl: "https://rancher.mydomain.com/v3", // Replace with your Rancher API endpoint
    tokenKey: "token-xxxxx", // Replace with your Rancher API token
    clusterId: clusterId,
});

// Create a new Kubernetes namespace for your Helm chart if it doesn’t exist
const namespace = new rancher2.Namespace(namespaceName, {
    projectId: pulumi.interpolate`${projectName}:${clusterId}`,
    name: namespaceName,
    description: "Namespace for the mod-graphql Helm chart",
}, { provider });

// Deploy the mod-graphql Helm chart to the Rancher-managed cluster
const helmChart = new rancher2.HelmChart("mod-graphql-chart", {
    catalogName: "helm", // Replace or define the Helm catalog
    chartName: helmChartName,
    chartVersion: helmChartVersion,
    clusterId: clusterId,
    projectId: pulumi.interpolate`${projectName}:${clusterId}`,
    namespaceId: namespace.metadata.apply(meta => meta.namespace),
    values: "", // Overrides for values.yaml file (if any)
}, { provider });

// Export the Helm chart deployment status
export const helmChartStatus = helmChart.status;
```

This TypeScript code does the following:

- It imports the necessary Pulumi libraries for the project.
- It configures the Rancher2 provider with the API URL and token, as well as the target cluster ID where the Helm chart will be deployed.
- It creates a Kubernetes namespace inside the Rancher-managed cluster if it doesn't already exist. This is where the `mod-graphql` Helm chart will be installed.
- It defines a new Helm chart resource using the `rancher2.HelmChart` class, pointing to the `mod-graphql` chart and specifying the version and namespace to use. If there are any specific configuration values that are needed to tailor the Helm chart for your environment, these can be included in the `values` property.
- Finally, it exports the status of the Helm chart deployment, so you can retrieve its state once the Pulumi script is applied.

To execute this Pulumi program, you would typically run `pulumi up` in the command line from the directory where your Pulumi TypeScript program is defined. This will prompt Pulumi to begin the deployment process, creating any defined resources and printing the exported outputs at the end.

Please replace placeholder values (`my-cluster-id`, `token-xxxxx`, etc.) with your actual Rancher and Helm chart information before running this code. Furthermore, depending on your actual setup, you may need to add more configuration details, such as setting up the Helm repository or including specific values overrides for your `mod-graphql` chart.