Deploy the mysql8 helm chart on Kubernetes

Question

Pulumi · Accepted Answer

To deploy the MySQL 8 Helm chart on Kubernetes using Pulumi, you will use the `Chart` resource from the Pulumi Kubernetes provider. The `Chart` resource allows you to deploy Helm charts from Helm repositories to your Kubernetes cluster. In this example, we'll deploy the MySQL chart from the Bitnami Helm repository, which is a popular source for community-maintained Helm charts.

Here's a step-by-step guide along with the necessary TypeScript code to achieve this:

1. **Set up your Pulumi project**: If you haven't done so, start by creating a new Pulumi project in your preferred language. Since we are using TypeScript in this example, ensure you have Node.js and npm installed.

2. **Install the Pulumi CLI and Kubernetes provider**: You'll need to install the Pulumi CLI and the Kubernetes provider to interact with your Kubernetes cluster. You can add the Pulumi Kubernetes provider to your project by running `npm install @pulumi/kubernetes`.

3. **Configure the Kubernetes cluster**: Ensure that you have `kubectl` configured to connect to your Kubernetes cluster. Pulumi uses the same configuration to deploy resources to the cluster.

4. **Deploy MySQL 8 with Helm**: You'll use the `Chart` resource to deploy the MySQL 8 chart. This will create a new deployment, services, and other needed resources on the cluster to run MySQL.

Here's the TypeScript program that will perform the deployment:

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

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

// Deploy MySQL 8 using a Helm Chart
const mysqlChart = new kubernetes.helm.v3.Chart('mysql-chart', {
    namespace: namespace.metadata.name,
    chart: 'mysql',
    version: '8.8.2', // Specify the exact chart version you want to deploy
    fetchOpts: {
        repo: 'https://charts.bitnami.com/bitnami',
    },
    values: {
        imageTag: '8.0.22-debian-10-r36', // Use the desired MySQL image tag
        auth: {
            rootPassword: 'strong-password', // Replace with a strong password or use secrets
            // Note: It's not recommended to hardcode passwords in source code. Consider using Pulumi secrets or Kubernetes secrets.
        },
        // Include additional configuration values here as needed.
    },
}, { dependsOn: [namespace] });

// Export the service name and service port of the MySQL deployment
export const serviceName = mysqlChart.getResourceProperty('v1/Service', 'mysql-chart-mysql', 'metadata').apply(m => m.name);
export const servicePort = mysqlChart.getResourceProperty('v1/Service', 'mysql-chart-mysql', 'spec').apply(s => s.ports[0].port);

```

The code does the following:
- Imports the Pulumi Kubernetes package to interact with Kubernetes resources.
- Creates a new Kubernetes namespace called `mysql` where the MySQL database will be deployed.
- Deploys the MySQL 8 Helm chart from the Bitnami repository, specifying the chart name, repository URL, version, and values.
  - The `values` field is used to customize the deployment. Here we specify the image tag for MySQL and set the root password. For production uses, ensure you manage the root password securely.
- Sets a dependency on the namespace resource to ensure that the namespace is created before trying to deploy the Helm chart.
- Exports the service name and port, which can be useful to connect to the deployed MySQL instance from other applications within the cluster.

To run this Pulumi program, save the code to a file (e.g., `index.ts`), and then run `pulumi up`. This command will prompt you to confirm the actions before it applies them to the Kubernetes cluster.

Remember to replace placeholder values like `strong-password` with actual secret values and manage these secrets securely, preferably using Pulumi's secret management.