| context | Package context defines the Context type, which carries deadlines, cancellation signals, and other request-scoped values across API boundaries and between processes. |
| github.com/coreos/etcd/raft | Package raft sends and receives messages in the Protocol Buffer format defined in the raftpb package. |
| github.com/coreos/etcd/raft/raftpb | Package raftpb is a generated protocol buffer package. |
| log | Package log implements a simple logging package. |
| math/rand | Package rand implements pseudo-random number generators suitable for tasks such as simulation, but it should not be used for security-sensitive work. |
| sync | Package sync provides basic synchronization primitives such as mutual exclusion locks. |
| time | Package time provides functionality for measuring and displaying time. |