What is ReplicaSet?
A Kubernetes controller that maintains a stable set of replica pods running at any time.
A ReplicaSet ensures a specified number of pod replicas are running at any given time. If a pod dies, the ReplicaSet creates a new one. You rarely create ReplicaSets directly — Deployments manage ReplicaSets automatically and provide rolling update and rollback capabilities. ReplicaSets use label selectors to identify the pods they manage. When you scale a Deployment, it updates the ReplicaSet's replica count.
Related Terms
More Kubernetes Terms
Admission Controller
A Kubernetes plugin that intercepts API requests before objects are persisted.
Auto Scaling
Automatically adjusting the number of compute resources based on demand.
ClusterIP
The default Kubernetes Service type that exposes a service on an internal cluster IP.
ConfigMap
A Kubernetes object for storing non-sensitive configuration data as key-value pairs.
Controller Manager
Kubernetes control plane component running control loops to maintain desired state.
CoreDNS
The default DNS server in Kubernetes clusters for service discovery.
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