Deploy the mysqld-exporter helm chart on Azure Managed Openshift Service

Question

Pulumi · Accepted Answer

To deploy the `mysqld-exporter` Helm chart on Azure Managed Openshift Service using Pulumi, you'll need to follow several steps:

1. **Set up an Azure Managed Openshift Service**: This involves creating a resource group and then deploying an OpenShift cluster within it.

2. **Install Pulumi Kubernetes Provider**: This provider is used to interact with the Kubernetes API, and is needed to deploy Helm charts.

3. **Deploy the `mysqld-exporter` Helm chart**: Utilizing the Kubernetes provider, you will deploy the Helm chart to your Openshift cluster.

Below is a detailed Pulumi program written in TypeScript that accomplishes these steps. The program begins with importing necessary Pulumi packages, setting up the Azure Openshift managed cluster, and deploying the `mysqld-exporter` chart.

```typescript
import * as pulumi from "@pulumi/pulumi";
import * as azure_native from "@pulumi/azure-native";
import * as k8s from "@pulumi/kubernetes";

// Step 1: Create an Azure resource group to contain the managed OpenShift cluster.
const resourceGroup = new azure_native.resources.ResourceGroup("myResourceGroup");

// Step 2: Define the configuration for the OpenShift managed cluster.
// Note: Fill in `openShiftVersion`, `resourceName`, and other relevant properties based on your requirements.
const openshiftCluster = new azure_native.containerservice.OpenShiftManagedCluster("myOpenShiftCluster", {
    resourceGroupName: resourceGroup.name,
    openShiftVersion: "4.3.0", // Specify the desired OpenShift version.
    resourceName: "mycluster", // Replace with the name of your cluster.
    // Provide additional required properties like agentPoolProfiles, masterPoolProfile, etc.
    // See the documentation: https://www.pulumi.com/registry/packages/azure-native/api-docs/containerservice/openshiftmanagedcluster/
});

// After setting up the Openshift Cluster, you need credentials to communicate with the cluster;
// For Azure Openshift, you would typically use service principals or managed identities.
// This example assumes you have created and configured the necessary service principal or managed identity
// and have its details available for the next steps.

// Step 3: Configure the Kubernetes provider to use the credentials of the Azure Openshift cluster.
const k8sProvider = new k8s.Provider("myK8sProvider", {
    kubeconfig: openshiftCluster.kubeconfig.apply(kc => kc.rawConfig),
});

// Step 4: Define the configuration of the mysqld-exporter Helm chart.
// Note: You might need to configure the Helm chart with necessary values like MySQL connection details.
const mysqldExporterChart = new k8s.helm.v3.Chart("mysqld-exporter-chart", {
    chart: "mysqld-exporter", // This is the chart name; ensure that this is available in the Helm repo.
    // Set the Helm repository URL here if needed. E.g. `repo: "https://charts.bitnami.com/bitnami"`
    values: {
        // Provide the required values for the chart here.
        // For example:
        // mysql: {
        //     user: "user",
        //     password: "password",
        //     host: "mysql-service",
        // },
    },
}, { provider: k8sProvider });

// Export the cluster name and kubeconfig of the OpenShift cluster for easy access.
export const clusterName = openshiftCluster.resourceName;
export const kubeconfig = openshiftCluster.kubeconfig.apply(kc => kc.rawConfig);
```

In this program:

- The `azure_native.resources.ResourceGroup` creates a new resource group where your Openshift cluster will reside.
- The `azure_native.containerservice.OpenShiftManagedCluster` defines the Azure Openshift cluster. You'll need to specify details such as `openShiftVersion` and `resourceName`. The exact version number and resource name might change, so it's best to check Azure documentation or Azure portal for the latest and correct values.
- The `k8s.Provider` sets up the Kubernetes provider with the obtained kubeconfig from the Openshift cluster, so Pulumi can communicate with the Kubernetes cluster to deploy applications.
- The `k8s.helm.v3.Chart` resource is used to deploy the `mysqld-exporter` Helm chart. The provided values are dependent on the Helm chart's requirements, which typically include the connection information to a MySQL instance.

Since we are working with sensitive details like a kubeconfig, ensure that your Pulumi stack is appropriately secured and that you're managing secrets according to best practices.

You would run this Pulumi program by using the Pulumi CLI. Change into the directory where this program is located and run the following commands:

```sh
pulumi up
```

This will prompt you to review the changes and confirm the deployment. After successful deployment, you can interact with your Openshift cluster using `kubectl` with the output kubeconfig.

Please ensure that you've logged into your Azure account through the Azure CLI and set up the Pulumi Azure Native provider before running this code. If you need help with pre-requisites setup or have questions regarding the configuration and deployment, feel free to ask.