The AppDynamics Cluster Agent enables Ginas’ CloudOps team to get deep level visibility into EKS clusters, including every node, pod, and namespace down to the container level. The Cluster Agent utilizes the existing Kubernetes Metrics Server API to bring back key performance data at the cluster, namespace, and node level. The agent displays metrics on Events, Pods, Deployments, Daemon-sets, Jobs, Services, Service Endpoints, Quotas, Configs, Containers, and Resource Limits.
Let’s get started by navigating to the Cluster Agent dashboard.
1 . Click on the Servers option on the top menu.
2 . Click on the Clusters option on the left menu.
2 . Double-click on the cluster named like <your_lab_user_name>-AD-Fin-PostMod
The Kubernetes cluster agent provides the following:
The main cluster dashboard provides an overall view of the health of the cluster. Views include a summary of errors that will impact cluster / app performance, cluster resource utilization, and quota utilization.
Next we’ll look at the cluster events. The events view displays the cluster events that are specific to the selected cluster. You can use the filter to view any specific event.
1 . Click on the Events tab.
2 . Double-click on one of the events to view the detail.
The cluster inventory provides a view into the Kubernetes objects in use on this cluster. It’s a good area to verify the application deployment is utilizing best practices for deploying to Kubernetes (readiness and liveliness probes, resource limits, non-privileged pods, etc.).
The cluster pods view gives us a list of all of the pods running within the cluster that are being monitored by the cluster agent. We can also see the CPU / memory utilization, the internal host, and the number of restarts that have occurred for each pod.
1 . Double-click on one of the pods to view the detail
1 . Because this particular pod is being instrumented by AppDynamics APM, the cluster agent is able to create a link to the appropriate node in the APM dashboard from this view. And with this linking, it’s much faster to be able to drill down to a potential root cause within the application.
In the next section we’ll look at how AppDynamics offers enterprise-grade performance cloud monitoring and analytics tools to bolster business results in your journey to cloud native.