Deploy the vulnerable-log4j helm chart on Rancher

Question

Pulumi · Accepted Answer

To deploy a Helm chart on a Rancher-managed Kubernetes cluster using Pulumi, you'd typically follow these steps:

Ensure you have access to the Rancher-managed Kubernetes cluster and the necessary credentials.
Use the Pulumi Rancher2 provider to interact with your Rancher setup.
Deploy the vulnerable-log4j Helm chart using Pulumi's Helm support.

Below, I am providing a Pulumi program written in TypeScript that will use the rancher2 package to deploy a specified Helm chart, in this case, vulnerable-log4j. For the sake of this example, we assume that the Helm chart vulnerable-log4j is available in a Helm repository that's accessible from your Rancher-managed Kubernetes cluster.

This program assumes you have Pulumi installed and configured with the necessary cloud credentials. Here are detailed steps in the TypeScript code:

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

// Step 1: Instantiate Rancher2 provider with the required credentials.
const rancher2Provider = new rancher2.Provider("rancher", {
    apiUrl: "<RANCHER_API_URL>", // Replace <RANCHER_API_URL> with your Rancher API URL.
    tokenKey: "<RANCHER_BEARER_TOKEN>", // Replace <RANCHER_BEARER_TOKEN> with your Rancher Bearer Token.
    // More configurations might be needed depending on your Rancher setup.
});

// Step 2: Configure Kubernetes provider to deploy resources to your Rancher-managed cluster.
const k8sProvider = new k8s.Provider("k8s", {
    kubeconfig: "<KUBECONFIG_CONTENTS>", // Replace <KUBECONFIG_CONTENTS> with the contents of your kubeconfig file.
    // Ensure this kubeconfig is able to communicate with your Rancher-managed Kubernetes cluster.
}, { dependsOn: rancher2Provider });

// Step 3: Deploy the "vulnerable-log4j" Helm chart to the cluster.
const helmRelease = new k8s.helm.v3.Release("vulnerable-log4j-release", {
    chart: "vulnerable-log4j",
    version: "<CHART_VERSION>", // Replace <CHART_VERSION> with the version number of the chart.
    repositoryOpts: {
        repo: "<HELM_CHARTS_REPO_URL>", // Replace <HELM_CHARTS_REPO_URL> with the URL of the Helm repository.
    },
    // Include any values you want to override in the chart.
    values: {
        service: {
            type: "ClusterIP",
        },
        // ... other values to override ...
    },
}, { provider: k8sProvider });

// Export the endpoint of the service deployed by the Helm chart.
// This assumes that the service is of type LoadBalancer or NodePort
// and the Helm chart deploys a service for the application.
export const serviceEndpoint = helmRelease.status.apply(status => {
    if (status.resources) {
        const serviceResource = status.resources.find(r => r.kind === "Service");
        if (serviceResource) {
            const service = serviceResource as pulumi.Output<any>;
            // Construct the endpoint based on service type and available data.
            // You might need modification based on the service details in your Helm chart.
            return serviceResource.type === "LoadBalancer"
                ? service.status.loadBalancer.ingress[0].ip
                : `http://${service.metadata.name}:${service.spec.ports[0].nodePort}`;
        }
    }
    return "Service not found";
});

This Pulumi program performs the following actions:

It configures the providers required to interact with Rancher and Kubernetes. Note that you have to replace the placeholders with appropriate values for your setup (<RANCHER_API_URL>, <RANCHER_BEARER_TOKEN>, <KUBECONFIG_CONTENTS>, <CHART_VERSION>, <HELM_CHARTS_REPO_URL>).
It deploys the vulnerable-log4j Helm chart to the designated Rancher-managed Kubernetes cluster using the specified Helm chart version and repository URL. You again need to replace these placeholders with values specific to the vulnerable-log4j Helm chart that you're deploying.
Lastly, it attempts to export the endpoint of the deployed service. Depending on the service type provided by your Helm chart (LoadBalancer, NodePort, etc.), you may need to adjust the export code block to extract the proper endpoint.

Notes:

Ensure that the vulnerable-log4j Helm chart exists at the specified repository URL in your actual use case.
Adjust the values object to set any configurations that the Helm chart accepts.
The endpoint export logic is a starting point and needs adjustment based on the actual service that gets deployed and your specific needs (e.g., if you have an Ingress controller handling the endpoint exposure).

After writing this code into a .ts file, you would run pulumi up in the command line within the same directory as the file to deploy your infrastructure.