Using kubernetes cilium.io with dynatrace.com

Question

Pulumi · Accepted Answer

In order to integrate `cilium.io` networking capabilities with `dynatrace.com` monitoring in a Kubernetes cluster, you need to carry out two separate installations: 
1. Deploy Cilium within your Kubernetes cluster to handle networking concerns.
2. Set up Dynatrace to monitor your Kubernetes cluster's performance, including the networking handled by Cilium.

For the first part, you will typically use `helm` to install Cilium on your Kubernetes cluster. However, Pulumi does not directly handle helm chart deployments as an infrastructure as code task. You would run helm commands outside the context of the Pulumi program. For example, after setting up your Kubernetes cluster, you would use the following helm command to install Cilium:
```shell
helm install cilium cilium/cilium --version 1.9.5 \
  --namespace kube-system \
  --set global.kubeProxyReplacement=partial \
  --set global.hostServices.enabled=false \
  --set global.externalIPs.enabled=true \
  --set global.nodePort.device=enp0s8 \
  --set config.ipam=kubernetes
```

For the second part, if you want to use Dynatrace to monitor your Kubernetes cluster, you would use the relevant Pulumi resources to configure your Dynatrace integration. Here is how you might do it with Pulumi in TypeScript, utilizing the `dynatrace` package for Pulumi:

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

// Initialize a new or existing Kubernetes cluster config
const k8sConfig = new pulumi.Config("kubernetes");
const kubeconfig = k8sConfig.require("kubeconfig");

// Create a Kubernetes provider instance using the specified kubeconfig
const provider = new kubernetes.Provider("kubernetes-provider", {
  kubeconfig: kubeconfig,
});

// Define the scope and credentials for integrating Dynatrace with your Kubernetes cluster
// You need to replace 'DYNATRACE_API_URL', 'DYNATRACE_API_TOKEN', 'CLUSTER_ID' with your actual Dynatrace information
const dynatraceK8sIntegration = new dynatrace.Kubernetes("dynatraceK8sIntegration", {
  // The Dynatrace environment URL. You can retrieve this from your Dynatrace dashboard.
  endpointUrl: "DYNATRACE_API_URL",
  // Unique label for your Kubernetes credentials configuration in Dynatrace
  label: "my-k8s-cluster",
  // The scope for which these credentials are valid. Set to the URL of the Dynatrace environment.
  scope: "DYNATRACE_API_URL",
  // The API token for authenticating with the Dynatrace API. This should be treated as a secret.
  authToken: pulumi.secret("DYNATRACE_API_TOKEN"),
  // The identifier for your Kubernetes cluster as known within Dynatrace
  clusterId: "CLUSTER_ID",
  // Enable this integration
  enabled: true,
  // Following fields are typically configured based on the specific needs and can be set or omitted
  // clusterIdEnabled: ...
  // eventPatterns: ...
}, { provider: provider });

// Export the Dynatrace endpoint for easy access
export const dynatraceEndpoint = dynatraceK8sIntegration.endpointUrl;

// The rest of the code is meant to set up further Dynatrace resources and configurations,
// such as anomaly detection rules, log storage integrations, credentials, or specific
// application monitoring rules.

// The above code is the starting point to integrate Dynatrace with your Kubernetes cluster
// using Pulumi. It defines a `dynatrace.Kubernetes` resource which tells Dynatrace how to
// access your Kubernetes cluster and what data to gather.
```

The `dynatrace.Kubernetes` resource is used to integrate Dynatrace with a Kubernetes cluster. The `endpointUrl` specifies the Dynatrace environment endpoint, while the `authToken` is your API token used for authentication. Replace `DYNATRACE_API_URL`, `DYNATRACE_API_TOKEN`, and `CLUSTER_ID` with your actual Dynatrace information. The `enabled` property turns the integration on.

Remember that outside of this Pulumi program, you would still need to install the Cilium agent on your cluster using helm (or another appropriate installation method) and then configure it according to your needs.

You would also likely want to establish more specific monitoring resources within Dynatrace for thorough observability, as shown in the commented section. These would be additional `dynatrace` package resources tailored to your monitoring setup.

More details about each available Dynatrace resource can be found on Pulumi's [Dynatrace provider documentation](https://www.pulumi.com/registry/packages/dynatrace/api-docs/).