134 lines
3.6 KiB
Go
134 lines
3.6 KiB
Go
// Copyright (c) 2015-2021 MinIO, Inc.
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//
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// This file is part of MinIO Object Storage stack
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package cmd
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import (
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"context"
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"runtime"
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"github.com/minio/madmin-go"
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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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respCh 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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workers int
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}
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func systemIO() int {
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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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return int(globalHTTPListen.NumSubscribers()) + int(globalTrace.NumSubscribers())
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}
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func waitForLowHTTPReq() {
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var currentIO func() int
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if httpServer := newHTTPServerFn(); httpServer != nil {
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currentIO = httpServer.GetRequestCount
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}
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globalHealConfig.Wait(currentIO, systemIO)
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}
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func initBackgroundHealing(ctx context.Context, objAPI ObjectLayer) {
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// Run the background healer
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globalBackgroundHealRoutine = newHealRoutine()
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for i := 0; i < globalBackgroundHealRoutine.workers; i++ {
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go globalBackgroundHealRoutine.AddWorker(ctx, objAPI)
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}
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globalBackgroundHealState.LaunchNewHealSequence(newBgHealSequence(), objAPI)
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}
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// Wait for heal requests and process them
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func (h *healRoutine) AddWorker(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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return
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}
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var res madmin.HealResultItem
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var err error
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switch task.bucket {
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case nopHeal:
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task.respCh <- healResult{err: errSkipFile}
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continue
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case SlashSeparator:
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res, err = healDiskFormat(ctx, objAPI, task.opts)
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default:
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if task.object == "" {
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res, err = objAPI.HealBucket(ctx, task.bucket, task.opts)
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} else {
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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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}
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task.respCh <- healResult{result: res, err: err}
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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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workers := runtime.GOMAXPROCS(0) / 2
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if workers == 0 {
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workers = 4
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}
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return &healRoutine{
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tasks: make(chan healTask),
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workers: workers,
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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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