| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| github.com/coreos/etcd/etcdserver | Package etcdserver defines how etcd servers interact and store their states. |
| github.com/coreos/etcd/etcdserver/etcdhttp | Package etcdhttp provides etcd client and server implementations. |
| github.com/coreos/etcd/pkg/transport | Package transport implements various HTTP transport utilities based on Go net package. |
| github.com/coreos/etcd/pkg/types | Package types declares various data types and implements type-checking functions. |
| github.com/coreos/etcd/rafthttp | Package rafthttp implements HTTP transportation layer for etcd/raft pkg. |
| github.com/coreos/go-etcd/etcd | |
| io/ioutil | Package ioutil implements some I/O utility functions. |
| net | Package net provides a portable interface for network I/O, including TCP/IP, UDP, domain name resolution, and Unix domain sockets. |
| net/http | Package http provides HTTP client and server implementations. |
| net/http/httptest | Package httptest provides utilities for HTTP testing. |
| os | Package os provides a platform-independent interface to operating system functionality. |
| testing | Package testing provides support for automated testing of Go packages. |
| time | Package time provides functionality for measuring and displaying time. |