98 строки
2.5 KiB
Go
98 строки
2.5 KiB
Go
/*
|
|
*
|
|
* 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"
|
|
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 {
|
|
logger.Infof("error calling Enable: %v\n", err)
|
|
return err
|
|
}
|
|
|
|
logger.Infof("successfully set enabled = %v", enabled)
|
|
return nil
|
|
}
|
|
|
|
func retrieveSnapshot(ctx context.Context, c ppb.ProfilingClient, f string) error {
|
|
logger.Infof("getting stream stats")
|
|
resp, err := c.GetStreamStats(ctx, &ppb.GetStreamStatsRequest{})
|
|
if err != nil {
|
|
logger.Errorf("error calling GetStreamStats: %v\n", err)
|
|
return err
|
|
}
|
|
s := &snapshot{StreamStats: resp.StreamStats}
|
|
|
|
logger.Infof("creating snapshot file %s", f)
|
|
file, err := os.Create(f)
|
|
if err != nil {
|
|
logger.Errorf("cannot create %s: %v", f, err)
|
|
return err
|
|
}
|
|
defer file.Close()
|
|
|
|
logger.Infof("encoding data and writing to snapshot file %s", f)
|
|
encoder := gob.NewEncoder(file)
|
|
err = encoder.Encode(s)
|
|
if err != nil {
|
|
logger.Infof("error encoding: %v", err)
|
|
return err
|
|
}
|
|
|
|
logger.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()
|
|
}
|
|
|
|
logger.Infof("dialing %s", *flagAddress)
|
|
cc, err := grpc.Dial(*flagAddress, grpc.WithInsecure())
|
|
if err != nil {
|
|
logger.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?")
|
|
}
|
|
}
|