k8s Services

• kind: Service ,

  1. Service-NodePort k8s-Obj-bind external node port to internal. NodePort is external port 30000-32767

              apiVersion: v1
              kind: Service
              metadata:
                name: myapp-service
              spec:
                type: NodePort
                ports:
                 - targetPort: 80   ->POD
                   port: 80         ->This service local ip port (Optional)
                   nodePort: 30008  ->Node external port listening on host, same port on all Nodes!
                selector:
                  app: myapp
                  type: front-end

  2. Service-!ClusterIP internal network, default type

              apiVersion: v1
              kind: Service
              metadata:
                name: back-end-service
              spec:
                type: ClusterIP   << Default if not specified
                ports:
                 - targetPort: 80
                   port: 80
                selector:
                  name: my-app
                  type: back-end     

  3. Service-LoadBalancer - Configure external LB

              apiVersion: v1
              kind: Service
              metadata:
                name: myapp-service
              spec:
                type: Loadbalancer
                ports:
                 - targetPort: 80
                   port: 80
                   nodePort: 30008
                selector:
                  name: my-app
                  type: back-end