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139 lines
3.6 KiB
139 lines
3.6 KiB
/*
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* MinIO Cloud Storage, (C) 2019 MinIO, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package cmd
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import (
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"context"
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"time"
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"github.com/minio/minio/cmd/logger"
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"github.com/minio/minio/pkg/madmin"
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)
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// healTask represents what to heal along with options
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// path: '/' => Heal disk formats along with metadata
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// path: 'bucket/' or '/bucket/' => Heal bucket
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// path: 'bucket/object' => Heal object
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type healTask struct {
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bucket string
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object string
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versionID string
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opts madmin.HealOpts
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// Healing response will be sent here
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responseCh chan healResult
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}
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// healResult represents a healing result with a possible error
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type healResult struct {
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result madmin.HealResultItem
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err error
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}
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// healRoutine receives heal tasks, to heal buckets, objects and format.json
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type healRoutine struct {
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tasks chan healTask
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doneCh chan struct{}
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}
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// Add a new task in the tasks queue
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func (h *healRoutine) queueHealTask(task healTask) {
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h.tasks <- task
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}
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func waitForLowHTTPReq(maxIO int, maxWait time.Duration) {
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// No need to wait run at full speed.
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if maxIO <= 0 {
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return
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}
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// At max 10 attempts to wait with 100 millisecond interval before proceeding
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waitCount := 10
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waitTick := 100 * time.Millisecond
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// Bucket notification and http trace are not costly, it is okay to ignore them
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// while counting the number of concurrent connections
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maxIOFn := func() int {
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return maxIO + int(globalHTTPListen.NumSubscribers()) + int(globalHTTPTrace.NumSubscribers())
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}
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if httpServer := newHTTPServerFn(); httpServer != nil {
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// Any requests in progress, delay the heal.
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for httpServer.GetRequestCount() >= maxIOFn() {
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time.Sleep(waitTick)
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waitCount--
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if waitCount == 0 {
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if intDataUpdateTracker.debug {
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logger.Info("waitForLowHTTPReq: waited %d times, resuming", waitCount)
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}
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break
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}
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}
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}
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}
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// Wait for heal requests and process them
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func (h *healRoutine) run(ctx context.Context, objAPI ObjectLayer) {
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for {
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select {
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case task, ok := <-h.tasks:
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if !ok {
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break
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}
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var res madmin.HealResultItem
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var err error
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switch {
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case task.bucket == nopHeal:
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continue
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case task.bucket == SlashSeparator:
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res, err = healDiskFormat(ctx, objAPI, task.opts)
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case task.bucket != "" && task.object == "":
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res, err = objAPI.HealBucket(ctx, task.bucket, task.opts)
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case task.bucket != "" && task.object != "":
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res, err = objAPI.HealObject(ctx, task.bucket, task.object, task.versionID, task.opts)
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}
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task.responseCh <- healResult{result: res, err: err}
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case <-h.doneCh:
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return
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case <-ctx.Done():
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return
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}
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}
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}
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func newHealRoutine() *healRoutine {
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return &healRoutine{
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tasks: make(chan healTask),
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doneCh: make(chan struct{}),
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}
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}
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// healDiskFormat - heals format.json, return value indicates if a
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// failure error occurred.
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func healDiskFormat(ctx context.Context, objAPI ObjectLayer, opts madmin.HealOpts) (madmin.HealResultItem, error) {
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res, err := objAPI.HealFormat(ctx, opts.DryRun)
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// return any error, ignore error returned when disks have
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// already healed.
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if err != nil && err != errNoHealRequired {
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return madmin.HealResultItem{}, err
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}
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return res, nil
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}
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