Deploy the chronograf helm chart on Rancher

Question

Pulumi · Accepted Answer

To deploy the Chronograf Helm Chart on a Rancher-managed Kubernetes cluster using Pulumi, you should have access to a Rancher instance and have the appropriate permissions to create resources within it.

You’ll need to perform the following steps to accomplish this:

Set up a Rancher Kubernetes Cluster: Ensure you have a Kubernetes cluster managed by Rancher. If you don't already have one, you can create one using Pulumi with the rancher2.Cluster resource.
Add Helm Chart Repository: Add the repository containing the Chronograf Helm Chart to your Rancher setup using the rancher2.CatalogV2 resource if it’s not already present.
Deploy Chronograf: Deploy the Chronograf Helm Chart onto your cluster using the Rancher Apps and Market Place functionality, which can be represented by a combination of Pulumi resources such as ConfigMap, Service, Deployment, etc., or a specific Rancher2 Pulumi resource if available.

Below is a Pulumi program in TypeScript which demonstrates how to perform steps 2 and 3 assuming you have already configured a Kubernetes cluster in Rancher. Here we have focused on deploying the Helm Chart rather than setting up the cluster infrastructure itself.

Firstly, you need to install @pulumi/rancher2 package and set up your Pulumi program to interact with Rancher:

npm install @pulumi/rancher2

Here's the TypeScript program:

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

// Provide the details for your Rancher Kubernetes Cluster
const clusterId = "<RANCHER_CLUSTER_ID>"; // Replace with your actual cluster ID

// Add the Helm repository using the rancher2.CatalogV2 resource if it's not already available
const chronografRepo = new rancher2.CatalogV2("chronograf-repo", {
    clusterId: clusterId,
    name: "chronograf",
    url: "https://helm.influxdata.com/",
    gitBranch: "master",
    kind: "HelmChart",
});

// Deploy the Chronograf Helm Chart to the cluster
// Note: The actual resource might differ based on the support of Rancher Pulumi provider
const chronografChart = new k8s.helm.v3.Chart("chronograf", {
    chart: "chronograf",
    version: "1.1.0", // Specify the version you want to deploy
    fetchOpts: {
        repo: "https://helm.influxdata.com/",
    },
}, { provider: /* Provide your Kubernetes Provider pointing to Rancher if necessary */ });

// Export the endpoint to access Chronograf once it's deployed
export const chronografEndpoint = /* Find a way to extract the endpoint from the deployed resources */;

The above code performs the following actions:

It adds a Helm repository that contains the Chronograf chart using the rancher2.CatalogV2 resource.
It deploys the Chronograf chart to the connected Kubernetes cluster via the k8s.helm.v3.Chart resource. Note that currently, we don't directly deploy a Helm chart through Rancher using Pulumi, so we fall back to using the k8s package directly. You will need to ensure you have the right configuration pointing to your Rancher-managed cluster.

In the last part of the code, you see an export statement that's commented out. In a real environment, you could extract the endpoint (URL) from the deployed resources and export it so that you can access the Chronograf dashboard. In this case, you can usually get the service endpoint for Chronograf by looking up the Service resource that is exposed once the Helm chart is deployed.

Remember to replace <RANCHER_CLUSTER_ID> with your actual Rancher cluster ID and to specify the desired version of the Chronograf Helm chart.

You need to set up your Pulumi stack context to use the proper credentials for interacting with Rancher, and ensure that your Pulumi CLI is connected to the Rancher Kubernetes cluster you intend to deploy the chart to.

Please refer to the Rancher2 Provider documentation and Helm Chart resource documentation for more details.