You can add operational visibility to your Rack with Datadog.

Configure kubectl to Point at Your Rack

Convox allows you to securely connect your kubectl to your Convox created Kubernetes cluster by exporting a kubeconfig that will connect you to a Kubernetes API Proxy running inside your Rack. This allows you to use kubectl without directly exposing the credentials for your Kubernetes cluster. For example if your Rack is called myrack you could point your local kubectl to your Rack cluster as follows

$ convox rack kubeconfig > /tmp/myrack-config
$ export KUBECONFIG=/tmp/myrack-config

This will export the proxy configuration to a temporary file and then point your local kubectl environment at that location so you can connect to your Rack’s cluster. You will need to perform this step before you can execute any kubectl commands against your cluster.

Deploy the Datadog Agent

Once you have kubectl pointing at your Rack you can deploy the datadog agent as a Kubernetes Daemonset. The following is based on the Datadog Daemonset Installation Instructions so please refer back there for any specific tweaks you may want to make.

We recommend that you use the manifest datadog-agent-all-features.yaml when applying the agent. This ensures you can easily enter and edit the desired variables in one manifest file.
If you prefer you can install the agent piecewise manifests.

During installation we recommend adding the following to the environment section of the Daemonset spec:

  value: "name:datadog-agent"

This will remove extra noise from the Datadog Agent itself.

Verify Installation

You can verify the installation by running

$ kubectl get daemonset
datadog   4         4         4       4            4    134m
$ kubectl get pods
NAME                                    READY   STATUS    RESTARTS   AGE
datadog-bjw2m                           5/5     Running   0          135m
datadog-cluster-agent-b5fd4b7f5-tmkql   1/1     Running   0          135m
datadog-j9c9t                           5/5     Running   0          134m
datadog-pnrln                           5/5     Running   0          135m
datadog-vdzc5                           5/5     Running   0          135m

Once your DESIRED CURRENT and READY counts are all equal your Agents should be up and running. To make any changes to your Agent configuration simply modify your manifest and repeat the steps.

For further customization and troubleshooting please refer to the Datadog Daemonset Config Docs

Metrics and Traces

In order to use Datadog’s APM, Distributed Tracing, or Runtime Metrics you will need to connect to the Datadog agent.

The agent configuration above will be listening to 8125/udp and 8126/tcp on the instance IP address. This IP address will be available to your Processes in the INSTANCE_IP environment variable.

You can autoscale based on Datadog Metrics with a few additional steps.