Deploy the mysql-client helm chart on Kubernetes

Question

Pulumi · Accepted Answer

To deploy the `mysql-client` Helm chart on Kubernetes using Pulumi, you'll need to have a Kubernetes cluster available and configured to interact with Pulumi. Then you can create a Pulumi program in TypeScript to define and deploy your Helm release.

The main resource we'll use for this purpose is the `Chart` resource from the `@pulumi/kubernetes` package, which represents a Helm chart deployable into a Kubernetes cluster.

Here’s a step-by-step guide to help you understand the process:

1. **Setting Up the Pulumi Program**:
    - Start by importing the necessary Pulumi and Kubernetes packages.
    - Define a Helm chart using the `Chart` class, specifying the chart details such as name, version, and any custom values you wish to override.

2. **Specifying Chart Details**:
    - The `chart` parameter is the name of the chart you want to deploy, `mysql-client` in this case.
    - The `version` parameter is optional and specifies which version of the chart to deploy. If omitted, the latest version will be used.
    - Use `values` to override any default settings in the chart with your desired configuration.

3. **Running the Pulumi Program**:
    - After writing your Pulumi program, use `pulumi up` to preview and deploy your resources.

Let’s look at the TypeScript code that accomplishes this:

```typescript
import * as pulumi from "@pulumi/pulumi";
import * as kubernetes from "@pulumi/kubernetes";

// Create a Kubernetes namespace for the mysql-client.
const namespace = new kubernetes.core.v1.Namespace("mysql-client-ns", {
    metadata: {
        name: "mysql-client",
    },
});

// Deploy the mysql-client Helm chart into the Kubernetes cluster.
const mysqlClientChart = new kubernetes.helm.v3.Chart("mysql-client", {
    namespace: namespace.metadata.name,
    chart: "mysql-client",
    // Specific version of the Helm chart can be provided; otherwise, the latest is used by default.
    version: "1.6.5",
    fetchOpts: {
        repo: "https://charts.bitnami.com/bitnami",
    },
    // If you have custom values you want to override, you can specify them here.
    values: {
        // Example of setting a value, replace with actual values needed for the mysql-client chart.
        // image: {
        //     repository: "custom-mysql-client-image",
        //     tag: "latest",
        // },
    },
}, { provider: clusterProvider }); // Ensure you provide the cluster provider if you're not using the default one.

// Export the Namespace name and Helm Chart status.
export const namespaceName = namespace.metadata.name;
export const mysqlClientChartStatus = mysqlClientChart.status;

```

In the above TypeScript code, the crucial points are:
- `new kubernetes.core.v1.Namespace()` is used to create a namespace in Kubernetes where you will deploy your `mysql-client`.
- `new kubernetes.helm.v3.Chart()` is used to declare a Helm chart resource, where you specify the `chart` parameter with the name `mysql-client` and other optional parameters as needed.
- The `fetchOpts` property has an `repo` attribute specifying the repository URL of the Helm chart. Ensure that this URL is where your `mysql-client` chart is hosted.
- `values` is an object that holds any values you want to override in the default Helm chart configuration.
- The `provider` option is mentioned as a placeholder. If you're using a non-default Kubernetes provider, you'll need to pass the appropriate provider instance here.

To apply the above Pulumi program, run `pulumi up`. This command will provision the specified resources on the Kubernetes cluster, and you can see the output reflecting the resources created or updated. If the `mysql-client` you're referring to requires any specific values or is located in a different chart repository, be sure to update the program accordingly.