What is Scheduler?
Kubernetes control plane component that assigns pods to nodes based on constraints.
The Kubernetes Scheduler (kube-scheduler) watches for newly created pods with no assigned node and selects the best node for them to run on. It goes through two phases: filtering (removes nodes that don't meet the pod's requirements — resource requests, node selectors, taints, affinity) and scoring (ranks remaining nodes by fitness). Custom schedulers can be deployed alongside the default scheduler for specialized workloads like GPU jobs.
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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