| bytes | Package bytes implements functions for the manipulation of byte slices. |
| encoding/json | Package json implements encoding and decoding of JSON as defined in RFC 7159. |
| errors | Package errors implements functions to manipulate errors. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| github.com/coreos/etcd/pkg/systemd | |
| github.com/coreos/etcd/raft | Package raft sends and receives messages in the Protocol Buffer format defined in the raftpb package. |
| github.com/coreos/go-systemd/journal | Package journal provides write bindings to the local systemd journal. |
| github.com/coreos/pkg/capnslog | |
| go.uber.org/zap | Package zap provides fast, structured, leveled logging. |
| go.uber.org/zap/zapcore | Package zapcore defines and implements the low-level interfaces upon which zap is built. |
| google.golang.org/grpc/grpclog | Package grpclog defines logging for grpc. |
| io | Package io provides basic interfaces to I/O primitives. |
| log | Package log implements a simple logging package. |
| 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. |
| sort | Package sort provides primitives for sorting slices and user-defined collections. |
| sync | Package sync provides basic synchronization primitives such as mutual exclusion locks. |
| time | Package time provides functionality for measuring and displaying time. |