| context | Package context defines the Context type, which carries deadlines, cancellation signals, and other request-scoped values across API boundaries and between processes. |
| crypto/tls | Package tls partially implements TLS 1.2, as specified in RFC 5246, and TLS 1.3, as specified in RFC 8446. |
| errors | Package errors implements functions to manipulate errors. |
| github.com/go-kit/kit/log | Package log provides a structured logger. |
| github.com/go-kit/kit/sd | Package sd provides utilities related to service discovery. |
| github.com/go-kit/kit/sd/internal/instance | |
| go.etcd.io/etcd/clientv3 | clientv3 is the official Go etcd client for v3. |
| go.etcd.io/etcd/pkg/transport | Package transport implements various HTTP transport utilities based on Go net package. |
| sync | Package sync provides basic synchronization primitives such as mutual exclusion locks. |
| time | Package time provides functionality for measuring and displaying time. |