Building Enterprise JavaScript Applications

Kubernetes Object management hierarchy

To solidify your understanding that our Deployment object is managing a ReplicaSet object, you can run kubectl get rs to get a list of ReplicaSet in the cluster:

$ kubectl get rsNAME                       DESIRED   CURRENT   READY     AGEelasticsearch-699c7dd54f   3         3         3         3m

The name of a ReplicaSet is automatically generated from the name of the Deployment object that manages it, and a hash value derived from the Pod template:

<deployment-name>-<pod-template-hash>

Therefore, we know that the elasticsearch-699c7dd54f ReplicaSet is managed by the elasticsearch Deployment.

Using the same logic, you can run kubectl get pods to see a list of Pods:

$ kubectl get pods --show-labelsNAME                             READY  STATUS    LABELSelasticsearch-699c7dd54f-n5tmq 1/1 ...