Service Types
ClusterIP
Exposes the service on a cluster-internal IP. Choosing this value makes the service only reachable from within the cluster.
kubectl expose deployment myapp --type=ClusterIP --port=8080
NodePort
Exposes the service on each Node’s IP at a static port (the NodePort).
kubectl expose deployment myapp --type=NodePort --port=8080
DNS-Based Service Discovery
DNS Resolution
Kubernetes provides DNS service for service discovery. All services are assigned a DNS name.
ping myapp.default.svc.cluster.local
Ingress and Load Balancing
Ingress Controller
An Ingress is a collection of rules that allow inbound connections to reach cluster services.
kubectl apply -f my-ingress.yaml
Load Balancer Service
Creates an external Load Balancer and assigns a fixed, external IP to the service.
kubectl expose deployment myapp --type=LoadBalancer --port=80 --target-port=8080
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