thinQmaster Virtual testing partner Adaptive practice exams that find your weak spots and drill them. Every answer explained. From $69
Enroll

thinQmaster

Find your exam

Five questions free, before you decide.

Step 1 · choose a vendor

In one of our camps? Your practice exams come with the tuition — they are on your study page already.

DevOps & Automation · Foundational

ReplicaSet

A Kubernetes controller that maintains a stable set of identical pod replicas.

Definition

ReplicaSets use label selectors to count pods and create or delete them to match spec.replicas. They are usually managed by Deployments, which create a new ReplicaSet per rollout revision.

Example

kubectl get rs shows old and new ReplicaSets after a Deployment update.

Exam tip

Manage pods via Deployments, not ReplicaSets directly, to get rollouts and rollbacks.

Related terms