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 (
"encoding/json"
"errors"
"fmt"
"io"
"io/ioutil"
"net/http"
)
// ProfilerType represents the profiler type
// passed to the profiler subsystem, currently
// it can be only "cpu", "mem" or "block"
type ProfilerType string
const (
// ProfilerCPU represents CPU profiler type
ProfilerCPU = ProfilerType("cpu")
// ProfilerMEM represents MEM profiler type
ProfilerMEM = ProfilerType("mem")
// ProfilerBlock represents Block profiler type
ProfilerBlock = ProfilerType("block")
)
// 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(profiler ProfilerType) ([]StartProfilingResult, error) {
path := fmt.Sprintf("/v1/profiling/start/%s", profiler)
resp, err := adm.executeMethod("POST", requestData{
relPath: path,
})
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() (io.ReadCloser, error) {
path := fmt.Sprintf("/v1/profiling/download")
resp, err := adm.executeMethod("GET", 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
}