| cloud.google.com/go/compute/metadata | Package metadata provides access to Google Compute Engine (GCE) metadata and API service accounts. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| github.com/aws/aws-sdk-go/aws/ec2metadata | |
| github.com/aws/aws-sdk-go/aws/session | |
| log | Package log implements a simple logging package. |
| os | Package os provides a platform-independent interface to operating system functionality. |
| strings | Package strings implements simple functions to manipulate UTF-8 encoded strings. |
| sync | Package sync provides basic synchronization primitives such as mutual exclusion locks. |