What are services in Kubernetes and what function do they perform in application management?

In Kubernetes, services are an abstraction that provides a persistent network endpoint to a group of Pods, regardless of their lifecycle and IP addresses. Pods can be created and deleted, changing their IPs, while the service offers a stable endpoint (IP and DNS name) for interaction.

Main functions of services:

• Load balancing among the pods within the service.
• Providing stable access to pods via a virtual IP (ClusterIP) or an external IP (LoadBalancer).
• Service discovery within the cluster through DNS.

For example, if you have multiple replicas of an application, a service allows clients to access it via a single address, and Kubernetes will distribute requests among the replicas.