Imports
- github.com/coreos/etcd/clientv3
- github.com/coreos/etcd/clientv3/concurrency
- github.com/coreos/etcd/etcdserver/api/v3rpc/rpctypes
- github.com/coreos/etcd/mvcc/mvccpb
- github.com/juju/errors
- github.com/pingcap/tidb/terror
- github.com/sirupsen/logrus
- golang.org/x/net/context