Imports k8s.io/client-go/1.4/pkg/util/runtime k8s.io/client-go/1.4/pkg/kubelet/server/portforward k8s.io/client-go/1.4/pkg/api k8s.io/client-go/1.4/pkg/util/httpstream Standard library imports errors fmt io io/ioutil net net/http strconv strings sync