Building Enterprise JavaScript Applications

Declarative over imperative

Pods, Deployments, and ReplicaSet are examples of Kubernetes Objects. Kubernetes provides you with multiple approaches to run and manage them.

• kubectl run—imperative: You provide instructions through the command line to the Kubernetes API to carry out
• kubectl create—imperative: You provide instructions, in the form of a configuration file, to the Kubernetes API to carry out

• kubectl apply—declarative: You tell the Kubernetes API the desired state of your cluster using configuration file(s), and Kubernetes will figure out the operations required to reach that state

kubectl create is a slight improvement to kubectl run because the configuration file(s) can now be version controlled; however, it is still not ideal ...