Deploy the postgres-instance helm chart on Azure Managed Openshift Service
TypeScriptTo deploy a
postgres-instance
Helm chart on an Azure Managed OpenShift Service using Pulumi, you need to take several steps:-
Set up an Azure Managed OpenShift Cluster: This is your Kubernetes-compatible environment where the application will run. We will use the
azure-native.containerservice.OpenShiftManagedCluster
class to create this. -
Install the Helm Chart: After setting up the OpenShift cluster, you'll use the
kubernetes.helm.v3.Chart
class from Pulumi's Kubernetes provider to deploy thepostgres-instance
chart.
Here's how you could write your Pulumi program in TypeScript to accomplish this:
Step-by-step breakdown:
1. Set up an OpenShift Managed Cluster:
First, import the necessary Pulumi libraries and then declare your OpenShift cluster. Note that a real deployment would require you to have proper SSH keys, a domain, and other mandatory configuration settings in place, which are represented here as placeholders for the purposes of this example.
2. Deploy the Helm Chart:
With the cluster set up, next instantiate a Helm chart resource that points to the
postgres-instance
chart. You'll specify the repository (if it's a custom one), the chart name, and any values that need to be overridden in thevalues
parameter.Code:
import * as pulumi from "@pulumi/pulumi"; import * as azure_native from "@pulumi/azure-native"; import * as k8s from "@pulumi/kubernetes"; // Create an Azure Resource Group const resourceGroup = new azure_native.resources.ResourceGroup("myResourceGroup"); // Create an Azure Managed OpenShift cluster const cluster = new azure_native.containerservice.OpenShiftManagedCluster("myOpenShiftCluster", { /* Replace the below properties with actual values */ // resourceName: "myOpenShiftCluster", // resourceGroupName: resourceGroup.name, location: "East US", // Be sure to choose a location that supports OpenShift openShiftVersion: "4.3", // Use a supported OpenShift version networkProfile: { vnetCidr: "10.0.0.0/8", }, masterPoolProfile: { count: 3, // Number of masters vmSize: "Standard_D4s_v3" // Size of the VM instances }, // Other required configurations... // This example is simplified, more configuration will be needed in a real-world scenario // See the documentation: https://www.pulumi.com/registry/packages/azure-native/api-docs/containerservice/openshiftmanagedcluster/ }); // Create a provider for the above OpenShift cluster const k8sProvider = new k8s.Provider("k8sProvider", { kubeconfig: cluster.kubeconfigRaw, // kubeconfig is obtained from the OpenShift Managed Cluster }); // Deploy a postgres-instance Helm chart const postgresChart = new k8s.helm.v3.Chart("postgres-instance", { chart: "postgresql", version: "9.1.1", // Use the version of the chart you want to deploy fetchOpts: { repo: "https://charts.bitnami.com/bitnami" }, // Specify the Helm chart repository here, if it's not a default one // values: { /* Custom values for PostgreSQL */ }, }, { provider: k8sProvider }); // Specify the provider to ensure Helm uses the correct cluster // Export the kubeconfig to access the cluster export const kubeconfig = cluster.kubeconfigRaw; // When running `pulumi up`, Pulumi will do the following: // 1. Provision an Azure Managed OpenShift Service cluster // 2. Set up a Kubernetes provider associated with the new cluster // 3. Use the Kubernetes provider to install a postgres-instance Helm chart to the cluster
Explanation:
The above program does the following:
- It starts by creating a new resource group in Azure to contain all resources.
- Next, it provisions a new Azure Managed OpenShift cluster with necessary parameters like location, OpenShift version, network profile, and master pool profile.
- The
kubeconfig
for managing the Kubernetes resources within the OpenShift cluster is then obtained from the cluster resource itself. - A Kubernetes provider is then set up using this
kubeconfig
which allows Pulumi to communicate with your OpenShift cluster. - Using this provider, the
postgres-instance
Helm chart is deployed. Thechart
andversion
parameters are given to point to the correct Helm chart, and optionalvalues
parameters can be used to customize the PostgreSQL deployment. - Lastly, the
kubeconfig
string is exported. This allows you to access the cluster with kubectl or any Kubernetes-compatible tooling.
What's Next:
You need to run
pulumi up
within the Pulumi project directory to preview and deploy these changes. Pulumi will automatically handle the creation of resources in the correct-