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150 lines
4.2 KiB
150 lines
4.2 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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path 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(tolerance int32) {
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if httpServer := newHTTPServerFn(); httpServer != nil {
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// Wait at max 10 minute for an inprogress request before proceeding to heal
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waitCount := 600
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// Any requests in progress, delay the heal.
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for (httpServer.GetRequestCount() >= tolerance) &&
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waitCount > 0 {
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waitCount--
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time.Sleep(1 * time.Second)
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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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// Wait and proceed if there are active requests
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waitForLowHTTPReq(int32(globalEndpoints.Nodes()))
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var res madmin.HealResultItem
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var err error
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bucket, object := path2BucketObject(task.path)
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switch {
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case bucket == "" && object == "":
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res, err = healDiskFormat(ctx, objAPI, task.opts)
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case bucket != "" && object == "":
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res, err = objAPI.HealBucket(ctx, bucket, task.opts.DryRun, task.opts.Remove)
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case bucket != "" && object != "":
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res, err = objAPI.HealObject(ctx, bucket, object, task.opts)
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}
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if task.responseCh != nil {
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task.responseCh <- healResult{result: res, err: err}
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}
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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 initHealRoutine() *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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func startBackgroundHealing(ctx context.Context, objAPI ObjectLayer) {
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// Run the background healer
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globalBackgroundHealRoutine = initHealRoutine()
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go globalBackgroundHealRoutine.run(ctx, objAPI)
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// Launch the background healer sequence to track
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// background healing operations
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info := objAPI.StorageInfo(ctx, false)
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numDisks := info.Backend.OnlineDisks.Sum() + info.Backend.OfflineDisks.Sum()
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nh := newBgHealSequence(numDisks)
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globalBackgroundHealState.LaunchNewHealSequence(nh)
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}
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func initBackgroundHealing(ctx context.Context, objAPI ObjectLayer) {
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go startBackgroundHealing(ctx, objAPI)
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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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// Healing succeeded notify the peers to reload format and re-initialize disks.
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// We will not notify peers if healing is not required.
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if err == nil {
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for _, nerr := range globalNotificationSys.ReloadFormat(opts.DryRun) {
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if nerr.Err != nil {
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logger.GetReqInfo(ctx).SetTags("peerAddress", nerr.Host.String())
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logger.LogIf(ctx, nerr.Err)
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}
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}
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}
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return res, nil
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}
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