Imports vitess.io/vitess/go/vt/servenv vitess.io/vitess/go/vt/worker/grpcvtworkerclient vitess.io/vitess/go/vt/automation vitess.io/vitess/go/vt/vtctl/grpcvtctlclient vitess.io/vitess/go/vt/proto/automationservice google.golang.org/grpc Standard library imports fmt net os