| /* |
| * |
| * Copyright 2019 gRPC authors. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| */ |
| |
| package main |
| |
| import ( |
| "context" |
| "encoding/gob" |
| "fmt" |
| "os" |
| "time" |
| |
| "google.golang.org/grpc" |
| "google.golang.org/grpc/grpclog" |
| ppb "google.golang.org/grpc/profiling/proto" |
| ) |
| |
| func setEnabled(ctx context.Context, c ppb.ProfilingClient, enabled bool) error { |
| _, err := c.Enable(ctx, &ppb.EnableRequest{Enabled: enabled}) |
| if err != nil { |
| grpclog.Infof("error calling Enable: %v\n", err) |
| return err |
| } |
| |
| grpclog.Infof("successfully set enabled = %v", enabled) |
| return nil |
| } |
| |
| func retrieveSnapshot(ctx context.Context, c ppb.ProfilingClient, f string) error { |
| grpclog.Infof("getting stream stats") |
| resp, err := c.GetStreamStats(ctx, &ppb.GetStreamStatsRequest{}) |
| if err != nil { |
| grpclog.Errorf("error calling GetStreamStats: %v\n", err) |
| return err |
| } |
| s := &snapshot{StreamStats: resp.StreamStats} |
| |
| grpclog.Infof("creating snapshot file %s", f) |
| file, err := os.Create(f) |
| if err != nil { |
| grpclog.Errorf("cannot create %s: %v", f, err) |
| return err |
| } |
| defer file.Close() |
| |
| grpclog.Infof("encoding data and writing to snapshot file %s", f) |
| encoder := gob.NewEncoder(file) |
| err = encoder.Encode(s) |
| if err != nil { |
| grpclog.Infof("error encoding: %v", err) |
| return err |
| } |
| |
| grpclog.Infof("successfully wrote profiling snapshot to %s", f) |
| return nil |
| } |
| |
| func remoteCommand() error { |
| ctx := context.Background() |
| if *flagTimeout > 0 { |
| var cancel func() |
| ctx, cancel = context.WithTimeout(context.Background(), time.Duration(*flagTimeout)*time.Second) |
| defer cancel() |
| } |
| |
| grpclog.Infof("dialing %s", *flagAddress) |
| cc, err := grpc.Dial(*flagAddress, grpc.WithInsecure()) |
| if err != nil { |
| grpclog.Errorf("cannot dial %s: %v", *flagAddress, err) |
| return err |
| } |
| defer cc.Close() |
| |
| c := ppb.NewProfilingClient(cc) |
| |
| if *flagEnableProfiling || *flagDisableProfiling { |
| return setEnabled(ctx, c, *flagEnableProfiling) |
| } else if *flagRetrieveSnapshot { |
| return retrieveSnapshot(ctx, c, *flagSnapshot) |
| } else { |
| return fmt.Errorf("what should I do with the remote target?") |
| } |
| } |