minio/pkg/madmin/profiling-commands.go

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/*
* MinIO Cloud Storage, (C) 2017, 2018 MinIO, Inc.
*
* 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 madmin
import (
"context"
"encoding/json"
"errors"
"fmt"
"io"
"io/ioutil"
"net/http"
"net/url"
)
// ProfilerType represents the profiler type
// passed to the profiler subsystem.
type ProfilerType string
// Different supported profiler types.
const (
ProfilerCPU ProfilerType = "cpu" // represents CPU profiler type
ProfilerMEM ProfilerType = "mem" // represents MEM profiler type
ProfilerBlock ProfilerType = "block" // represents Block profiler type
ProfilerMutex ProfilerType = "mutex" // represents Mutex profiler type
ProfilerTrace ProfilerType = "trace" // represents Trace profiler type
ProfilerThreads ProfilerType = "threads" // represents ThreadCreate profiler type
ProfilerGoroutines ProfilerType = "goroutines" // represents Goroutine dumps.
)
// StartProfilingResult holds the result of starting
// profiler result in a given node.
type StartProfilingResult struct {
NodeName string `json:"nodeName"`
Success bool `json:"success"`
Error string `json:"error"`
}
// StartProfiling makes an admin call to remotely start profiling on a standalone
// server or the whole cluster in case of a distributed setup.
func (adm *AdminClient) StartProfiling(ctx context.Context, profiler ProfilerType) ([]StartProfilingResult, error) {
v := url.Values{}
v.Set("profilerType", string(profiler))
resp, err := adm.executeMethod(ctx,
http.MethodPost, requestData{
relPath: adminAPIPrefix + "/profiling/start",
queryValues: v,
},
)
defer closeResponse(resp)
if err != nil {
return nil, err
}
if resp.StatusCode != http.StatusOK {
return nil, httpRespToErrorResponse(resp)
}
jsonResult, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, err
}
var startResults []StartProfilingResult
err = json.Unmarshal(jsonResult, &startResults)
if err != nil {
return nil, err
}
return startResults, nil
}
// DownloadProfilingData makes an admin call to download profiling data of a standalone
// server or of the whole cluster in case of a distributed setup.
func (adm *AdminClient) DownloadProfilingData(ctx context.Context) (io.ReadCloser, error) {
path := fmt.Sprintf(adminAPIPrefix + "/profiling/download")
resp, err := adm.executeMethod(ctx,
http.MethodGet, requestData{
relPath: path,
},
)
if err != nil {
closeResponse(resp)
return nil, err
}
if resp.StatusCode != http.StatusOK {
return nil, httpRespToErrorResponse(resp)
}
if resp.Body == nil {
return nil, errors.New("body is nil")
}
return resp.Body, nil
}