Deploy the opensips helm chart on Digital Ocean Kubernetes Service

Question

Pulumi · Accepted Answer

To deploy the OpenSIPS Helm chart on Digital Ocean's Kubernetes Service using Pulumi, you'll need to create a Kubernetes cluster on Digital Ocean and then deploy a Helm chart to it. Here is a step-by-step guide including a TypeScript program that will accomplish this:

1. **Set Up Pulumi**: Ensure that you have Pulumi CLI installed and configured with the appropriate cloud provider credentials.
   
2. **Define the Kubernetes Cluster**: Define a Digital Ocean Kubernetes cluster by creating an instance of `digitalocean.KubernetesCluster`. This component represents a Kubernetes cluster in Digital Ocean and will create and manage the underlying resources required for the cluster.

3. **Deploy the OpenSIPS Helm Chart**: After the cluster is provisioned, utilize the `kubernetes.helm.v3.Chart` component, which allows you to deploy Helm charts within your Kubernetes cluster. A Helm chart is a collection of pre-configured Kubernetes resources that are used to deploy applications.

Here is the TypeScript program that defines the necessary Pulumi resources to deploy an OpenSIPS Helm chart on a Digital Ocean Kubernetes service:

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

// Step 1: Create a new Digital Ocean Kubernetes cluster
const cluster = new digitalocean.KubernetesCluster("do-cluster", {
    region: "nyc1", // Confirm the region you'd like to deploy the cluster in
    version: "1.21.5-do.0", // Use an appropriate K8s version available on DigitalOcean
    nodePool: {
        name: "worker-pool",
        size: "s-2vcpu-4gb", // Choose the appropriate size for your workloads
        nodeCount: 2, // Set the number of nodes you want in your node pool
    },
});

// Step 2: Use the created cluster's kubeconfig to interact with the cluster
const provider = new kubernetes.Provider("k8s-provider", {
    kubeconfig: cluster.kubeConfigs[0].rawConfig,
});

// Step 3: Deploy the OpenSIPS Helm chart on the Kubernetes cluster
const openSipsChart = new kubernetes.helm.v3.Chart("opensips", {
    chart: "opensips",
    version: "x.y.z", // Replace with actual chart version
    fetchOpts:{
        repo: "https://helm.opensips.org/", // Use the chart's repository URL
    },
}, { provider });

// Export the cluster's kubeconfig and OpenSIPS service endpoint
export const kubeconfig = cluster.kubeConfigs[0].rawConfig;
export const openSipsServiceIp = openSipsChart.getResourceProperty(
    "v1/Service", "opensips", "status").apply(status => status.loadBalancer.ingress[0].ip);
```

Before running this Pulumi program, verify the following:
- The Digital Ocean token is set up correctly in the Pulumi configuration or through environment variables.
- The Helm chart version `x.y.z` and chart repository `https://helm.opensips.org/` are placeholders. You will need to use the actual values for the OpenSIPS chart you want to deploy.

After this program is run with `pulumi up`, Pulumi will perform the following actions:
- Provision a new Kubernetes cluster on Digital Ocean.
- Configure Pulumi to interact with the newly created Kubernetes cluster.
- Deploy the specified version of the OpenSIPS Helm chart to the cluster.

Once the deployment is complete, Pulumi will output the cluster's `kubeconfig` and the IP address for accessing your OpenSIPS service.