Imports
- github.com/pkg/errors
- github.com/prometheus/client_golang/prometheus
- golang.org/x/net/context
- github.com/pingcap/kvproto/pkg/metapb
- go.uber.org/zap
- google.golang.org/grpc/credentials
- github.com/opentracing/opentracing-go
- github.com/pingcap/kvproto/pkg/pdpb
- github.com/pingcap/log
- google.golang.org/grpc