Node IP, Cluster IP, Pod IP

目录

• Node IP
• Cluster IP
• Pod IP

Node IP

IP of the machine(physical or virtual) that installed Kubernetes.

kubectl get nodes
kubectl describe node k8s -A | grep InternalIP

Cluster IP

It enables services within the cluster to communicate with each other.
Cluster IP, which is virtual IP, cannot be used to expose service to internet.

Client -> [ service(nodePort) -> pod(frontend) -> service(clusterIP) -> pod(backend) -> service(clusterIP) -> middleware(db/cache) ]

Pod IP

IP of a pod, which is virtual IP, managed by Kubernetes, usually we don't direclty use it.