1. Deploy the mongo helm chart on Kubernetes


    To deploy a MongoDB chart on Kubernetes with Pulumi, we'll use the kubernetes.helm.v3.Chart resource. Helm is a package manager for Kubernetes that allows you to define, install, and upgrade even the most complex Kubernetes applications. A Helm chart is a collection of files that describe a related set of Kubernetes resources.

    The kubernetes.helm.v3.Chart resource is a Pulumi abstraction that models a Helm chart. It allows us to deploy packaged applications into a Kubernetes cluster. The chart can be sourced from a remote Helm repository or from a local directory.

    Let's step through the necessary code to deploy the MongoDB Helm chart to a Kubernetes cluster. For the purpose of this example, we're assuming that you have already configured your Kubernetes cluster and Pulumi environment correctly.

    Here's the TypeScript program to deploy the MongoDB Helm chart:

    import * as pulumi from '@pulumi/pulumi'; import * as k8s from '@pulumi/kubernetes'; const namespace = new k8s.core.v1.Namespace("mongo-namespace", { metadata: { name: "mongo" } }); const mongoChart = new k8s.helm.v3.Chart("mongo-chart", { chart: "mongodb", version: "10.22.1", namespace: namespace.metadata.name, fetchOpts: { repo: "https://charts.bitnami.com/bitnami", }, }, { dependsOn: [namespace] }); export const mongoChartName = mongoChart.metadata.apply(md => md.name);

    In this program, we start by importing the necessary Pulumi libraries. We declare a new Kubernetes namespace for our MongoDB instance, just to keep things organized and separate from other deployments that may exist on the cluster.

    We then deploy the MongoDB Helm chart using the k8s.helm.v3.Chart constructor. We specify the chart name as mongodb, and also provide a version number for the chart which pins the chart to a specific version to ensure our deployment is repeatable.

    The fetchOpts parameter is used to specify the Helm chart repository URL where the MongoDB chart can be found. In this case, we're using the Bitnami chart repository.

    Finally, we declare an export statement. This statement makes the Helm chart's name a stack output, which can be useful if you want to use this information in another context or see it after deployment.

    To apply this Pulumi code and deploy the MongoDB Helm chart, you would typically use the Pulumi CLI to perform an update:

    pulumi up

    After running the command, Pulumi performs a plan and prompts you for confirmation before making any changes. Upon confirmation, it will deploy the MongoDB Helm chart onto your Kubernetes cluster within the specified namespace.