Deploy the aodh helm chart on Rancher

Question

Pulumi · Accepted Answer

To deploy a Helm chart on a Rancher-managed Kubernetes cluster, you would typically follow these steps:

Set up your Kubernetes cluster on Rancher, if you haven't already done so.
Install the Rancher CLI or use the Rancher UI to interact with your Rancher server.
Configure your access to the Rancher environment by setting up kubeconfig or API access.
Deploy the Helm chart using either Rancher's Catalog Apps feature or the Helm CLI, ensuring that Helm is configured to communicate with your Rancher cluster.

However, when we are aiming to automate this process using Pulumi, we would write a program that:

Configures Rancher2 provider.
Sets up a catalog for Helm charts in Rancher if needed.
Deploys the Helms chart to the Rancher cluster.

Below is an example of a Pulumi program written in TypeScript that uses the rancher2 package to deploy an Aodh Helm Chart. Please note that you'll need to replace placeholders (like <RANCHER_API_URL>, <CLUSTER_ID>, and other values) with actual values from your Rancher setup.

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

// Configure the Rancher2 provider with the necessary credentials
const rancher2Provider = new rancher2.Provider("rancher2", {
    apiUrl: "<RANCHER_API_URL>",
    accessKey: "<RANCHER_ACCESS_KEY>",
    secretKey: "<RANCHER_SECRET_KEY>",
});

// A Kubernetes provider instance is needed to create resources in the Rancher-managed cluster
const k8sProvider = new k8s.Provider("k8s", {
    kubeconfig: "<RANCHER_KUBECONFIG_CONTENT>",
});

// Deploying the Aodh Helm chart into the Rancher cluster
const aodhHelmChart = new k8s.helm.v3.Chart("aodh", {
    chart: "aodh",
    version: "<HELM_CHART_VERSION>", // Specify the version of the Helm chart you want to deploy
    namespace: "<NAMESPACE>", // Specify the namespace where the chart should be deployed
    // Values to override in the Helm chart.
    // You'll need to provide these according to the specific chart's values and your requirements.
    values: {
        // Example value overrides - replace these with the actual values required by the Aodh chart
        replicaCount: 1,
    },
}, { provider: k8sProvider });

// Export any required resource properties, for example, the Helm release status
export const helmStatus = aodhHelmChart.status;

Please note that this example assumes that you already have a Kubernetes cluster managed by Rancher and that you've replaced all placeholders with specific values for your environment. The rancher2.Provider instance configures Pulumi to interact with your Rancher instance, allowing it to deploy resources. The k8s.Provider instance is set up with the kubeconfig for your Rancher-managed Kubernetes cluster, so that the Helm chart can be deployed onto that specific cluster.

In the values, you will need to setup any necessary overrides for the Aodh Helm chart according to your needs.

Remember, before you can use the above Pulumi code, you need to have Pulumi installed, along with the necessary provider plugins for rancher2 and kubernetes. You can install plugins using the Pulumi CLI. And make sure to replace the placeholder values with those appropriate to your setup.

Once you've written your Pulumi program, you deploy your stack with the following CLI commands:

pulumi up             # Preview and deploy changes
pulumi stack output   # View stack outputs
pulumi destroy        # Tear down deployed resources

Please go through your Helm chart's values.yaml to understand which configurations are required and need to be overridden. The Pulumi Kubernetes provider uses these values to configure the Helm chart properly when deploying it to your cluster.