DatadogContainerExample

Information on application

Runtime & Version: .NET 6
OS: Debian

Datadog Agent Setup steps:

Create secrets for the Datadog Agent. The values can be found within your Datadog instance.

kubectl create secret generic datadog-agent --from-literal api-key=<DD_API_KEY> --from-literal app-key=<DD_APP_KEY>

Install the Datadog Linux Agent via Helm Install Helm

curl -fsSL -o get_helm.sh https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3 \ chmod 700 get_helm.sh \ ./get_helm.sh

Create a new file called values.yaml& within the new file set the following:

datadog:
 clusterName: <CLUSTER-NAME>
 apiKeyExistingSecret: datadog-agent
 apm:
  portEnabled: true
logs:
  enabled: true
  containerCollectAll: true
processAgent:
  processCollection: true
dogstatsd:
  useHostPort: true
kubeStateMetricsCore:
  enabled: true
kubeStateMetricsEnabled: false
kubelet:
  tlsVerify: false
networkMonitoring:
  enabled: true
securityAgent:
  compliance:
    enabled: true
  runtime:
    enabled: true
    syscallMonitor:
      enabled: true
agents:
# This toleration allows the agent to be deployed to every node.
tolerations:
  - operator: Exists

Add the Datadog Helm repository:

helm repo add datadog https://helm.datadoghq.com

Fetch the latest version of the newly added charts:

helm repo update

Create the namespace

kubectl create namespace <NAMESPACE>
Example: kubectl create namespace datadog-agent

Deploy the Datadog Agent

helm install <RELEASE_NAME> -n <NAMESPACE> -f datadog-values.yaml --set datadog.site='datadoghq.com' datadog/datadog

Verify that the Datadog Agent pods are running by the following command:

kubectl get pods --namespace <NAMESPACE>
Example: kubectl get pods --namespace datadog-agent

Deploy the .NET application

The Datadog .NET APM Library must be installed in the application container (i.e. Dockerfile) in order to bind the the application process. Please reference the Dockerfile in this GH repository to see how that is done.

Deploy the application pod

kubeclt create -f <APPLICATION_YAML>
Example: kubectl create -f dotnet_app.yaml

Deploy the application service (for the LoadBalancer)

kubeclt create -f <APPLICATION_YAML>
Example: kubectl create -f dotnet_app_service.yaml

Verify the application pod is running:

kubectl get po | grep dotnet

Troubleshooting

If you are updating the applicaiton manifest with a newer version:

kubectl delete -f dotnet_app.yaml 
kubectl create -f dotnet_app.yaml

Check the Load Balancer external IP:

kubectl get svc

To check the ContainerPort and HostPort:

kubectl describe pod <POD_NAME>
Example: kubectl describe pod dotnetapp-55f55dbbft-74cnf

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