1. Deploy the simple-mongodb helm chart on Linode Kubernetes Engine


    To deploy the simple-mongodb Helm chart on a Kubernetes cluster hosted on Linode Kubernetes Engine (LKE), we are going to follow these steps:

    1. Set up a Kubernetes Cluster: Before deploying the chart, we need a Kubernetes cluster. For this example, we won't detail the cluster creation on Linode and assume you have one available. If you need to create a cluster on LKE, you can do so through the Linode Cloud Console or using a Pulumi resource for Linode like linode.LKECluster (not shown in this example).

    2. Configure Kubernetes Provider: We'll set up the Pulumi Kubernetes provider to interact with the Linode Kubernetes cluster. Ensure you have your kubeconfig file ready, as this is the typical method to provide access credentials to Pulumi. Pulumi can automatically pick up the kubeconfig from the default file location (~/.kube/config) or the path provided by the KUBECONFIG environment variable.

    3. Deploy the Helm Chart: We'll use the kubernetes.helm.v3.Chart resource to deploy the simple-mongodb chart. This class is a high-level Pulumi resource that allows us to deploy Helm charts into a Kubernetes cluster.

    Below is a Pulumi program written in TypeScript that performs the deployment:

    import * as kubernetes from "@pulumi/kubernetes"; // Helm chart repository where `simple-mongodb` is located. const chartRepo = "https://charts.example.com/"; // Replace with the actual Helm chart repository URL const chartVersion = "1.0.0"; // Replace with the specific chart version you want to deploy // Configuration for the Helm chart's values. You should adjust these values according to your needs. // The properties for `values` depend on the specifics of the Helm chart you are deploying. // Please refer to the `simple-mongodb` chart's documentation for available options. const mongodbValues = { // Replace with the actual values required by the `simple-mongodb` Helm chart. auth: { rootPassword: "examplePassword", // You should use a more secure way to handle passwords. }, // ... Add other values as needed }; // Deploy `simple-mongodb` Helm chart to the Kubernetes cluster. const mongodbChart = new kubernetes.helm.v3.Chart("simple-mongodb", { chart: "simple-mongodb", version: chartVersion, fetchOpts: { repo: chartRepo, }, values: mongodbValues, }); // Export the MongoDB service endpoint, if applicable. export const mongodbEndpoint = mongodbChart.getResourceProperty("v1/Service", "simple-mongodb", "status").apply(status => status.loadBalancer.ingress[0].ip);

    In this program:

    • We first import the @pulumi/kubernetes package which provides the necessary resources to interact with Kubernetes, including Helm charts.

    • We define the Helm chart repository URL, the chart's name (simple-mongodb), and the version you want to deploy.

    • We prepare a configuration object, mongodbValues, which corresponds to the values you would typically pass to Helm to customize the deployment, like defining credentials, storage options, or other configurable parameters of the MongoDB chart.

    • We then create a new chart instance using kubernetes.helm.v3.Chart. We provide it with a unique name ("simple-mongodb"), the chart information, and the values to configure the chart.

    • Lastly, assuming the MongoDB service type is LoadBalancer and the endpoint is exposed, we export the MongoDB Service's external IP using getResourceProperty to query the status from the deployed Service resource. This is an example of how you can extract the useful output data such as IP addresses, external hostnames, or any other pertinent information post-deployment.

    Remember to replace placeholder values like the repository URL, chart version, and configuration values with actual information relevant to the simple-mongodb Helm chart you intend to deploy.

    To apply this Pulumi program, you first need to install Pulumi and set up your Pulumi account. After this, you can run pulumi up to create the specified resources in your Linode Kubernetes cluster.