Deploy the mattermost-calls-offloader helm chart on Digital Ocean Kubernetes Service

Question

Pulumi · Accepted Answer

To deploy the Mattermost Calls Offloader Helm chart on the Digital Ocean Kubernetes Service using Pulumi, you would perform the following steps:

1. **Set up a Kubernetes cluster on Digital Ocean**: You will create a new Kubernetes cluster on Digital Ocean.
2. **Deploy the Helm Chart**: Once you have the cluster, you'll deploy the Mattermost Calls Offloader Helm chart using Pulumi’s Kubernetes provider.

### Creating the Digital Ocean Kubernetes Cluster

The `digitalocean.KubernetesCluster` resource will be used to provision a Kubernetes cluster. You'll need to specify the region, the version of Kubernetes, and the node pool configuration.

### Deploying the Mattermost Calls Offloader Helm Chart

For the Helm chart deployment, you will use the `kubernetes.helm.v3.Chart` resource from Pulumi's Kubernetes provider. This resource will manage the Helm chart installation within the Kubernetes cluster you provisioned. You would use the `chart`, `version`, and `values` parameters to point to the Mattermost Calls Offloader chart and configure it according to your requirements.

Below is a program written in TypeScript that accomplishes this:

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

// Create a Digital Ocean Kubernetes cluster
const cluster = new digitalocean.KubernetesCluster('do-cluster', {
    region: 'nyc1', // Select the appropriate region for your cluster
    version: '1.21.5-do.0', // Use the version that's best for your use case
    nodePool: {
        name: 'default-pool',
        size: 's-2vcpu-2gb', // Select the appropriate size for your nodes
        nodeCount: 2, // Number of nodes in the node pool
    },
});

// Once the cluster is provisioned, we'll use the kubeconfig to connect to it.
const kubeconfig = cluster.kubeConfigs[0].rawConfig;

// Create a provider to deploy the Helm chart using the newly created cluster's kubeconfig.
const k8sProvider = new kubernetes.Provider('do-k8s', {
    kubeconfig: kubeconfig,
});

// Deploy the Mattermost Calls Offloader Helm chart
const mattermostChart = new kubernetes.helm.v3.Chart('mattermost-calls-offloader', {
    chart: 'mattermost-calls-offloader',
    // You'll need to add a repo that contains your chart, for example:
    // fetchOpts: {
    //     repo: 'https://helm.mattermost.com',
    // },
    // Specify the chart version you want to deploy
    version: '0.1.0',
    // Add necessary values for the chart here.
    // This will be specific to Mattermost Calls Offloader chart and your requirements
    values: {
        // Placeholder for actual configurable values
    },
}, { provider: k8sProvider });

// Export the cluster's kubeconfig and the service endpoint where Mattermost is reachable
export const kubeconfigOutput = kubeconfig;
export const mattermostEndpoint = cluster.endpoint;

```

### Explanation:

- The Digital Ocean Kubernetes cluster is created with the selected region, version, and node pool configuration using the `digitalocean.KubernetesCluster` resource.
- A new `kubernetes.Provider` is instantiated using the generated kubeconfig from the created cluster.
- The Mattermost Calls Offloader Helm chart is deployed using the `kubernetes.helm.v3.Chart` resource. The chart's version and custom values are placeholders and should be replaced with the actual version and configuration values relevant to the Mattermost Calls Offloader.
- The endpoints for Kubernetes API (`cluster.endpoint`) and the generated kubeconfig (`kubeconfigOutput`) are exported from the program. These can be used to interact with the cluster and the deployed Mattermost application.

After writing this program, you would run `pulumi up` to create the resources as described.

Keep in mind that to run this program successfully:

- You need to have the Pulumi CLI installed and configured for Digital Ocean.
- The Helm chart details such as `version` and `values` should be set according to the Mattermost Calls Offloader Helm chart you are using.
- You might also need to specify the chart's repository using the `fetchOpts` parameter if it is not part of the default Helm chart repositories.