| context | Package context defines the Context type, which carries deadlines, cancellation signals, and other request-scoped values across API boundaries and between processes. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| github.com/spf13/pflag | Package pflag is a drop-in replacement for Go's flag package, implementing POSIX/GNU-style --flags. |
| io/ioutil | Package ioutil implements some I/O utility functions. |
| k8s.io/apimachinery/pkg/util/wait | Package wait provides tools for polling or listening for changes to a condition. |
| k8s.io/client-go/kubernetes | Package kubernetes holds packages which implement a clientset for Kubernetes APIs. |
| k8s.io/client-go/rest | |
| k8s.io/kubernetes/cmd/kube-controller-manager/app | Package app implements a server that runs a set of active components. |
| k8s.io/kubernetes/cmd/kube-controller-manager/app/config | |
| k8s.io/kubernetes/cmd/kube-controller-manager/app/options | Package options provides the flags used for the controller manager. |
| net | Package net provides a portable interface for network I/O, including TCP/IP, UDP, domain name resolution, and Unix domain sockets. |
| os | Package os provides a platform-independent interface to operating system functionality. |
| time | Package time provides functionality for measuring and displaying time. |