This example features a Top implementation to retrieve resource usage for a given Node and its Pods.
The example execution will print a list of Pod Containers within a node and the amount of CPU and Memory they've allocated and are using.
The report ends with a list of the total resources used in the provided Node.
In order to run the example you need an active K8s cluster (e.g. Minikube).
In the project quick start directory, run mvn clean package -q:
$ mvn clean package -q
Node minikube allocatable resources, cpu: 2.0, memory: 3.754GiB, pods 110
POD (CONTAINER) CPU / LIMIT MEM / LIMIT
============================================================ =========== ===========
coredns-66bff467f8-4kjrg (coredns) 0.1 / 0.0 70MiB / 170MiB
coredns-66bff467f8-wghfg (coredns) 0.1 / 0.0 70MiB / 170MiB
etcd-minikube (etcd) 0.0 / 0.0 0.0 / 0.0
kube-apiserver-minikube (kube-apiserver) 0.25 / 0.0 0.0 / 0.0
kube-controller-manager-minikube (kube-controller-manager) 0.2 / 0.0 0.0 / 0.0
kube-proxy-9hrm5 (kube-proxy) 0.0 / 0.0 0.0 / 0.0
kube-scheduler-minikube (kube-scheduler) 0.1 / 0.0 0.0 / 0.0
storage-provisioner (storage-provisioner) 0.0 / 0.0 0.0 / 0.0
dashboard-metrics-scraper-84bfdf55ff-qx7sn (dashboard-metric 0.0 / 0.0 0.0 / 0.0
kubernetes-dashboard-bc446cc64-2ftwh (kubernetes-dashboard) 0.0 / 0.0 0.0 / 0.0
yakc-quickstart-pod (java-test-pod) 0.0 / 0.0 0.0 / 0.0
============================================================ =========== ===========
TOTAL 0.75 / 0.0 140MiB / 340MiB