The default load balancing approach used by Kubernetes is the round-robin method.
Here's how it works:
-
Traffic Distribution: When a service receives requests, Kubernetes distributes the incoming traffic evenly across all the pods that match the service's selector. This ensures that no single pod is overwhelmed with requests while others remain idle.
-
Session Affinity: By default, Kubernetes does not maintain session affinity, meaning that requests from the same client can be routed to different pods. However, you can enable session affinity if needed by setting the
sessionAffinityfield toClientIPin the service configuration. -
ClusterIP Service Type: The default service type in Kubernetes is
ClusterIP, which provides internal load balancing within the cluster. It allows pods to communicate with each other using a stable IP address.
Overall, the round-robin approach helps achieve efficient resource utilization and improves the overall performance of applications running in a Kubernetes cluster.
