Deploy the jx-app-jenkins helm chart on Rancher

Question

Pulumi · Accepted Answer

To deploy the `jx-app-jenkins` Helm chart on a Rancher-managed Kubernetes cluster using Pulumi, you will need to follow several steps:

1. **Set up a Rancher Kubernetes cluster:** You first need a working Kubernetes cluster managed by Rancher. You can create a new cluster within Rancher or import an existing one.

2. **Install the Rancher2 Pulumi Provider:** This provider allows you to interact with Rancher resources through Pulumi.

3. **Deploy the Helm Chart:** You will use the `Helm` class from the `kubernetes` Pulumi provider to deploy the `jx-app-jenkins` chart.

Here's a sample Pulumi program that illustrates these steps in TypeScript. This assumes that you have a Kubernetes cluster managed by Rancher and appropriate access rights to deploy Helm charts to it.

First, ensure you have the necessary Pulumi packages installed:

```sh
npm install @pulumi/pulumi
npm install @pulumi/kubernetes
npm install @pulumi/rancher2
```

Next, you can use the following Pulumi program:

```typescript
import * as pulumi from "@pulumi/pulumi";
import * as k8s from "@pulumi/kubernetes";
import * as rancher2 from "@pulumi/rancher2";

// Step 1: Configure Rancher Kubernetes provider (if necessary)
// In this case, it's assumed that the cluster is already provisioned,
// and the kubeconfig file is properly configured to access it.

// Step 2: Define a new rancher2 provider instance
const rancher2Provider = new rancher2.Provider("my-rancher", {
    // You must already be authenticated to Rancher and have an API token
    apiToken: 'your-rancher-api-token',
    apiUrl: 'your-rancher-server-url',
});

// Step 3: Deploy jx-app-jenkins helm chart on the rancher2 cluster
const jenkinsHelmChart = new k8s.helm.v3.Chart("jx-app-jenkins-helm-chart", {
    chart: "jenkins",
    version: "YOUR_DESIRED_CHART_VERSION", // specify the version you want to deploy
    fetchOpts: {
        repo: "https://charts.jenkins.io", // the repository where the chart is located
    },
    // Define namespace, values and other chart parameters under the 'values'
    // key or by passing the --values flag in CLI-based installations.
    values: {
        /* provide customized values.yaml content here,
           check https://github.com/jenkinsci/helm-charts for chart values */
    },
}, { provider: rancher2Provider });

// Optionally, export the endpoint to access Jenkins dashboard (usually a LoadBalancer IP or DNS)
export const jenkinsEndpoint = jenkinsHelmChart.getResourceProperty(
    "v1/Service",
    "jx-app-jenkins-helm-chart-jenkins", // assuming this will the service name
    "status"
).apply(status => status.loadBalancer.ingress[0].ip || status.loadBalancer.ingress[0].hostname);
```

This Pulumi program performs three main tasks:

- **Setting up the Rancher2 provider:** To interact with Rancher using Pulumi, you should have a `rancher2.Provider` instance. The `apiToken` and `apiUrl` refer to the API token to authenticate with your Rancher server and the URL of your Rancher server, respectively.

- **Deploys the Helm chart:** The `k8s.helm.v3.Chart` class is used to deploy the `jx-app-jenkins` chart. You will need to provide specific values such as the version and repository of the chart, as well as any custom values you want to provide to the chart.

- **Exporting the Jenkins endpoint:** After the chart is deployed, you may want to access the Jenkins dashboard. The service endpoint can usually be obtained from the `status.loadBalancer.ingress` field of your Jenkins service. The `jenkinsEndpoint` will export this value so you can easily access Jenkins once it's up.

Note that you will need to replace `'your-rancher-api-token'`, `'your-rancher-server-url'`, and any other placeholder content with actual data from your setup. Please ensure you have the necessary permissions and the kubeconfig for the relevant Kubernetes cluster is correctly set up to work with Pulumi.

Remember that Pulumi scripts are executed using the Pulumi CLI. Once you have the script, navigate to the directory containing the script in your terminal, and then run `pulumi up` to deploy the changes described by the script to your cloud provider.