Managing Pods with ReplicaSets

A ReplicaSet is a term for API objects in Kubernetes that refer to Pod replicas. The idea is to be able to control a set of Pods' behaviors. The ReplicaSet ensures that the Pods, in the amount of a user-specified number, are running all the time. If some Pods in the ReplicaSet crash and terminate, the system will recreate Pods with the original configurations on healthy nodes automatically, and keep a certain number of processes continuously running. While changing the size of set, users can scale the application out or down easily. According to this feature, no matter whether you need replicas of Pods or not, you can always rely on ReplicaSet for auto-recovery and scalability. In this recipe, you're going to learn how to manage your Pods with ReplicaSet:

ReplicaSet and their Pods on two nodes

The ReplicaSet usually handles a tier of...