minio/pkg/madmin/service-commands.go
Harshavardhana ae654831aa
Add madmin package context support (#9172)
This is to improve responsiveness for all
admin API operations and allowing callers
to cancel any on-going admin operations,
if they happen to be waiting too long.
2020-03-20 15:00:44 -07:00

124 lines
3.2 KiB
Go

/*
* MinIO Cloud Storage, (C) 2016-2019 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"
"net/http"
"net/url"
"strconv"
trace "github.com/minio/minio/pkg/trace"
)
// ServiceRestart - restarts the MinIO cluster
func (adm *AdminClient) ServiceRestart(ctx context.Context) error {
return adm.serviceCallAction(ctx, ServiceActionRestart)
}
// ServiceStop - stops the MinIO cluster
func (adm *AdminClient) ServiceStop(ctx context.Context) error {
return adm.serviceCallAction(ctx, ServiceActionStop)
}
// ServiceAction - type to restrict service-action values
type ServiceAction string
const (
// ServiceActionRestart represents restart action
ServiceActionRestart ServiceAction = "restart"
// ServiceActionStop represents stop action
ServiceActionStop = "stop"
)
// serviceCallAction - call service restart/update/stop API.
func (adm *AdminClient) serviceCallAction(ctx context.Context, action ServiceAction) error {
queryValues := url.Values{}
queryValues.Set("action", string(action))
// Request API to Restart server
resp, err := adm.executeMethod(ctx,
http.MethodPost, requestData{
relPath: adminAPIPrefix + "/service",
queryValues: queryValues,
},
)
defer closeResponse(resp)
if err != nil {
return err
}
if resp.StatusCode != http.StatusOK {
return httpRespToErrorResponse(resp)
}
return nil
}
// ServiceTraceInfo holds http trace
type ServiceTraceInfo struct {
Trace trace.Info
Err error `json:"-"`
}
// ServiceTrace - listen on http trace notifications.
func (adm AdminClient) ServiceTrace(ctx context.Context, allTrace, errTrace bool) <-chan ServiceTraceInfo {
traceInfoCh := make(chan ServiceTraceInfo)
// Only success, start a routine to start reading line by line.
go func(traceInfoCh chan<- ServiceTraceInfo) {
defer close(traceInfoCh)
for {
urlValues := make(url.Values)
urlValues.Set("all", strconv.FormatBool(allTrace))
urlValues.Set("err", strconv.FormatBool(errTrace))
reqData := requestData{
relPath: adminAPIPrefix + "/trace",
queryValues: urlValues,
}
// Execute GET to call trace handler
resp, err := adm.executeMethod(ctx, http.MethodGet, reqData)
if err != nil {
closeResponse(resp)
return
}
if resp.StatusCode != http.StatusOK {
traceInfoCh <- ServiceTraceInfo{Err: httpRespToErrorResponse(resp)}
return
}
dec := json.NewDecoder(resp.Body)
for {
var info trace.Info
if err = dec.Decode(&info); err != nil {
break
}
select {
case <-ctx.Done():
return
case traceInfoCh <- ServiceTraceInfo{Trace: info}:
}
}
}
}(traceInfoCh)
// Returns the trace info channel, for caller to start reading from.
return traceInfoCh
}