Deploy the opensips helm chart on Kubernetes

Question

Pulumi · Accepted Answer

To deploy the OpenSIPS Helm chart on a Kubernetes cluster using Pulumi and TypeScript, you'll need to create a Pulumi project, make sure that `kubectl` is configured to connect to your Kubernetes cluster, and install the `@pulumi/kubernetes` package, which allows you to interact with Kubernetes resources.

The program below demonstrates how to accomplish this task using the `Chart` resource from the `@pulumi/kubernetes` package. This will deploy the OpenSIPS Helm chart into the Kubernetes cluster associated with the context in your local `kubectl` configuration.

Install the necessary Pulumi package:

```bash
npm install @pulumi/kubernetes
```

Here is the Pulumi TypeScript program:

```typescript
import * as k8s from "@pulumi/kubernetes";

// Allocate a namespace for the OpenSIPS Helm chart
const namespace = new k8s.core.v1.Namespace("opensips-ns", {
    metadata: {
        name: "opensips",
    },
});

// Deploy OpenSIPS Helm chart using the Chart resource
const openSipsChart = new k8s.helm.v3.Chart("opensips", {
    chart: "opensips",
    version: "1.0.0", // Replace with the desired chart version
    namespace: namespace.metadata.name,
    fetchOpts: {
        repo: "http://myhelmrepo.com/", // Replace with the Helm repository URL that hosts the OpenSIPS chart
    },
}, { dependsOn: [namespace] });

// Export the namespace name
export const opensipsNamespace = namespace.metadata.name;

// Export the OpenSIPS service endpoint
export const openSipsServiceEndpoint = openSipsChart
    .getResource("v1/Service", "opensips", "opensips-service") // Adjust the arguments to match the actual service name and kind
    .metadata
    .apply(meta => `http://${meta.name}.${meta.namespace}.svc.cluster.local`);

```

In the above program:
- We first import the necessary Kubernetes package from Pulumi.
- We create a Kubernetes namespace where the OpenSIPS Helm chart will be deployed. Namespaces help you organize your Kubernetes resources.
- We then declare a `Chart` resource, named `opensips`, representing the deployment of the OpenSIPS Helm chart.
  - `chart` specifies the name of the chart to deploy.
  - `version` is the chart version that you want to deploy. You need to replace `1.0.0` with the actual chart version you intend to use.
  - `namespace` is the namespace into which you want to deploy the chart. We use the name of the namespace we created earlier.
  - `fetchOpts.repo` is the URL of the Helm chart repository that contains the OpenSIPS Helm chart. Replace `http://myhelmrepo.com/` with the actual URL.
- We include a `dependsOn` option to ensure that the namespace is created before the Helm chart is deployed.
- We export the `opensipsNamespace`, which allows you to see the namespace's name after deployment through Pulumi's CLI.
- We export the `openSipsServiceEndpoint`, which tries to create a well-formed URL for accessing the OpenSIPS service inside the cluster. This assumes a Service resource named `opensips-service` is created as part of the Helm chart.

To deploy this with Pulumi, save the program to a file, such as `index.ts`, in your Pulumi project directory. Then, run the following commands to login to Pulumi, select the appropriate stack (an isolated environment where your project's resources are deployed), and apply the changes:

```bash
pulumi login
pulumi stack select my-stack-name # Replace with your stack name or create a new one
pulumi up
```

Pulumi will show you a preview of the resources that will be created and ask for confirmation before proceeding with the deployment. If everything looks good, confirm the deployment, and Pulumi will deploy the OpenSIPS Helm chart to your Kubernetes cluster.

Remember, this program assumes that you have a Kubernetes cluster already set up and that `kubectl` is configured to connect to it. Additionally, ensure that the version number and repository URL match the details of the OpenSIPS Helm chart you wish to deploy.