| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| io | Package io provides basic interfaces to I/O primitives. |
| k8s.io/api/core/v1 | Package v1 is the v1 version of the core API. |
| k8s.io/apimachinery/pkg/apis/meta/v1 | Package v1 contains API types that are common to all versions. |
| k8s.io/apimachinery/pkg/util/errors | Package errors implements various utility functions and types around errors. |
| k8s.io/kubernetes/cmd/kubeadm/app/constants | |
| k8s.io/kubernetes/cmd/kubeadm/app/util/apiclient | Package apiclient contains wrapping logic for Kubernetes API clients. |
| os | Package os provides a platform-independent interface to operating system functionality. |
| path/filepath | Package filepath implements utility routines for manipulating filename paths in a way compatible with the target operating system-defined file paths. |
| time | Package time provides functionality for measuring and displaying time. |