In Kubernetes, what does Service Discovery refer to?

In Kubernetes, what does Service Discovery refer to?

• A. A tool to manage Helm charts
• B. A feature to log events to a central server
• C. A system that allows services to locate and communicate with each other on the network
• D. A protocol for storing secrets

Answer: (C)

Service discovery in Kubernetes is about locating and talking to other services on the cluster network. In practice, Kubernetes provides a stable way for clients to reach a service through a dedicated name and a consistent endpoint. A Service object creates a stable virtual IP and a DNS name for a set of pods, and a DNS server inside the cluster resolves that name to the service's IP. Requests to the service name are then load-balanced across the currently healthy pods behind that service, with the Endpoints list updated as pods scale up or down. This means services don’t need to know the exact IPs of the pods they talk to, only the service name. This is distinct from other functions like Helm chart management (packaging and deploying apps), central logging (recording events), or secret storage (handling sensitive data). The essence of service discovery is enabling automatic location and communication between services in the cluster.

Service discovery in Kubernetes is about locating and talking to other services on the cluster network. In practice, Kubernetes provides a stable way for clients to reach a service through a dedicated name and a consistent endpoint. A Service object creates a stable virtual IP and a DNS name for a set of pods, and a DNS server inside the cluster resolves that name to the service's IP. Requests to the service name are then load-balanced across the currently healthy pods behind that service, with the Endpoints list updated as pods scale up or down. This means services don’t need to know the exact IPs of the pods they talk to, only the service name.

This is distinct from other functions like Helm chart management (packaging and deploying apps), central logging (recording events), or secret storage (handling sensitive data). The essence of service discovery is enabling automatic location and communication between services in the cluster.