Deploy the free5gc helm chart on Linode Kubernetes Engine

Question

Pulumi · Accepted Answer

To deploy the free5gc Helm chart on Linode Kubernetes Engine (LKE) using Pulumi, we will follow these steps:

1. Set up a new Linode Kubernetes Engine cluster if you don't already have one.
2. Use the Kubernetes provider to interact with the cluster.
3. Deploy the free5gc Helm chart to the LKE cluster.

I will guide you through each step with explanations and code. Let's start by initializing the Pulumi program which is written in TypeScript.

Firstly, we need to create a new Pulumi project and stack, and install the required Pulumi packages for Linode and Kubernetes. You can do this using the Pulumi CLI. Once your new Pulumi project is ready, we will use the `@pulumi/linode` package to create a new LKE cluster and the `@pulumi/kubernetes` package to deploy the free5gc Helm chart.

The structure of the Pulumi program looks like this:

1. Import the necessary packages.
2. Create a new LKE cluster.
3. Configure the Kubernetes provider to use the kubeconfig from the created LKE cluster.
4. Deploy the free5gc Helm chart using the Helm Release resource.

Here is the complete Pulumi program in TypeScript:

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

// Set the desired settings for the LKE cluster
const clusterName = "free5gc-cluster";
const k8sVersion = "1.20"; // Specify the version of Kubernetes you want to use
const region = "us-central"; // Specify the Linode region to deploy the LKE cluster
const nodeType = "g6-standard-2"; // Specify the node type for the LKE cluster
const nodeCount = 3; // Specify the number of nodes for the LKE cluster

// Create a new LKE cluster
const cluster = new linode.LkeCluster(clusterName, {
    label: clusterName,
    k8sVersion: k8sVersion,
    region: region,
    pools: [{
        type: nodeType,
        count: nodeCount,
    }],
});

// Export the kubeconfig of the LKE cluster
export const kubeconfig = cluster.kubeconfig;

// Create a Kubernetes Provider instance with the kubeconfig from the LKE cluster
const provider = new k8s.Provider("lkeK8sProvider", {
    kubeconfig: cluster.kubeconfig,
});

// Deploy the free5gc Helm chart using the Helm Chart resource
const free5gcChart = new k8s.helm.v3.Chart("free5gc", {
    chart: "free5gc",
    version: "latest", // Specify the chart version if necessary
    // Sets the namespace where free5gc will be installed
    namespace: "free5gc",
    // Helm fetch options can be used if your Helm chart is not in a public repository
    fetchOpts: {
        repo: "https://path-to-your-helm-chart-repo/", // Replace with the Helm chart repository URL
    },
}, { provider });

// Export the status of the deployed Helm chart
export const free5gcStatus = free5gcChart.status;

```

This code does the following:

- It imports the necessary Linode and Kubernetes providers from Pulumi.
- It sets the configuration options for the LKE cluster (like the Kubernetes version, region, node type, and the number of cluster nodes).
- It then creates a new LKE cluster with the specified configuration.
- It exports the kubeconfig of the LKE cluster so that you can interact with the cluster using `kubectl`.
- It then creates a Kubernetes provider instance configured with the kubeconfig of the newly created LKE cluster.
- Finally, it deploys the free5gc Helm chart to the Kubernetes cluster. You should replace `"https://path-to-your-helm-chart-repo/"` with the actual URL of the Helm chart repository for free5gc.

To run this program and deploy the resources, you will need to use the Pulumi CLI. Execute the following commands in your terminal:
- `pulumi up` to create or update resources.
- `pulumi destroy` to delete resources.
- `pulumi stack export` to view the outputs, such as the kubeconfig.

Keep in mind that you will need to have your Linode access token configured for Pulumi to create resources in your Linode account. You can do this by setting the token as an environment variable (`LINODE_TOKEN`) or by using the Pulumi configuration system.

Also, ensure that you have access to the free5gc Helm chart repository and that the repository's URL is specified correctly in the `fetchOpts.repo` field. You might also need to configure other Helm chart values according to your needs, which can be done in the `values` field inside the `free5gcChart` declaration.

Once you deploy this, the free5gc application should be running in your Linode Kubernetes Engine cluster.