Imports github.com/pkg/errors github.com/pingcap/pd/pkg/tempurl github.com/coreos/go-semver/semver github.com/pingcap/kvproto/pkg/pdpb github.com/pingcap/pd/server/api github.com/coreos/etcd/clientv3 github.com/pingcap/pd/server Standard library imports context fmt io/ioutil os strings sync time