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minio/cmd/bucket-quota.go

287 lines
7.5 KiB

/*
* MinIO Cloud Storage, (C) 2020 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 cmd
import (
"context"
"encoding/json"
"errors"
"fmt"
"sync"
"time"
"github.com/minio/minio/cmd/config"
"github.com/minio/minio/cmd/logger"
"github.com/minio/minio/pkg/env"
"github.com/minio/minio/pkg/event"
"github.com/minio/minio/pkg/madmin"
)
// BucketQuotaSys - map of bucket and quota configuration.
type BucketQuotaSys struct {
quotaMap map[string]madmin.BucketQuota
}
// Get - Get quota configuration.
func (sys *BucketQuotaSys) Get(bucketName string) (q madmin.BucketQuota, err error) {
if globalIsGateway {
objAPI := newObjectLayerFn()
if objAPI == nil {
return q, errServerNotInitialized
}
return q, BucketQuotaConfigNotFound{Bucket: bucketName}
}
q, ok := sys.quotaMap[bucketName]
if !ok {
configData, err := globalBucketMetadataSys.GetConfig(bucketName, bucketQuotaConfigFile)
if err != nil {
if errors.Is(err, errConfigNotFound) {
return q, BucketQuotaConfigNotFound{Bucket: bucketName}
}
return q, err
}
return parseBucketQuota(bucketName, configData)
}
return q, nil
}
// Buckets - list of buckets with quota configuration
func (sys *BucketQuotaSys) Buckets() []string {
var buckets []string
for k := range sys.quotaMap {
buckets = append(buckets, k)
}
return buckets
}
// Init initialize bucket quota sys configuration with all buckets.
func (sys *BucketQuotaSys) Init(buckets []BucketInfo, objAPI ObjectLayer) error {
if objAPI == nil {
return errServerNotInitialized
}
// In gateway mode, we do not support bucket quota.
// So, this is a no-op for gateway servers.
if globalIsGateway {
return nil
}
return sys.load(buckets, objAPI)
}
func (sys *BucketQuotaSys) load(buckets []BucketInfo, objAPI ObjectLayer) error {
for _, bucket := range buckets {
ctx := logger.SetReqInfo(GlobalContext, &logger.ReqInfo{BucketName: bucket.Name})
configData, err := globalBucketMetadataSys.GetConfig(bucket.Name, bucketQuotaConfigFile)
if err != nil {
if errors.Is(err, errConfigNotFound) {
continue
}
return err
}
quotaCfg, err := parseBucketQuota(bucket.Name, configData)
if err != nil {
if _, ok := err.(BucketQuotaConfigNotFound); !ok {
logger.LogIf(ctx, err)
}
continue
}
sys.quotaMap[bucket.Name] = quotaCfg
}
return nil
}
// NewBucketQuotaSys returns initialized BucketQuotaSys
func NewBucketQuotaSys() *BucketQuotaSys {
return &BucketQuotaSys{quotaMap: map[string]madmin.BucketQuota{}}
}
// parseBucketQuota parses BucketQuota from json
func parseBucketQuota(bucket string, data []byte) (quotaCfg madmin.BucketQuota, err error) {
if len(data) == 0 {
return quotaCfg, BucketQuotaConfigNotFound{Bucket: bucket}
}
if err = json.Unmarshal(data, &quotaCfg); err != nil {
return quotaCfg, err
}
if !quotaCfg.Type.IsValid() {
return quotaCfg, fmt.Errorf("Invalid quota type %s", quotaCfg.Type)
}
return
}
type bucketStorageCache struct {
bucketsSizes map[string]uint64
lastUpdate time.Time
mu sync.Mutex
}
func (b *bucketStorageCache) check(ctx context.Context, q madmin.BucketQuota, bucket string, size int64) error {
b.mu.Lock()
defer b.mu.Unlock()
if time.Since(b.lastUpdate) > 10*time.Second {
dui, err := loadDataUsageFromBackend(ctx, newObjectLayerWithoutSafeModeFn())
if err != nil {
return err
}
b.lastUpdate = time.Now()
b.bucketsSizes = dui.BucketsSizes
}
currUsage := b.bucketsSizes[bucket]
if (currUsage+uint64(size)) > q.Quota && q.Quota > 0 {
return BucketQuotaExceeded{Bucket: bucket}
}
return nil
}
func enforceBucketQuota(ctx context.Context, bucket string, size int64) error {
if size < 0 {
return nil
}
q, err := globalBucketQuotaSys.Get(bucket)
if err != nil {
if _, ok := err.(BucketQuotaConfigNotFound); !ok {
return err
}
return nil
}
if q.Type == madmin.FIFOQuota {
return nil
}
return globalBucketStorageCache.check(ctx, q, bucket, size)
}
const (
bgQuotaInterval = 1 * time.Hour
)
// initQuotaEnforcement starts the routine that deletes objects in bucket
// that exceeds the FIFO quota
func initQuotaEnforcement(ctx context.Context, objAPI ObjectLayer) {
if env.Get(envDataUsageCrawlConf, config.EnableOn) == config.EnableOn {
go startBucketQuotaEnforcement(ctx, objAPI)
}
}
func startBucketQuotaEnforcement(ctx context.Context, objAPI ObjectLayer) {
for {
select {
case <-ctx.Done():
return
case <-time.NewTimer(bgQuotaInterval).C:
logger.LogIf(ctx, enforceFIFOQuota(ctx, objAPI))
}
}
}
// enforceFIFOQuota deletes objects in FIFO order until sufficient objects
// have been deleted so as to bring bucket usage within quota
func enforceFIFOQuota(ctx context.Context, objectAPI ObjectLayer) error {
// Turn off quota enforcement if data usage info is unavailable.
if env.Get(envDataUsageCrawlConf, config.EnableOn) == config.EnableOff {
return nil
}
for _, bucket := range globalBucketQuotaSys.Buckets() {
// Check if the current bucket has quota restrictions, if not skip it
cfg, err := globalBucketQuotaSys.Get(bucket)
if err != nil {
continue
}
if cfg.Type != madmin.FIFOQuota {
continue
}
dataUsageInfo, err := loadDataUsageFromBackend(ctx, objectAPI)
if err != nil {
return err
}
var toFree uint64
if dataUsageInfo.BucketsSizes[bucket] > cfg.Quota && cfg.Quota > 0 {
toFree = dataUsageInfo.BucketsSizes[bucket] - cfg.Quota
}
if toFree == 0 {
continue
}
// Allocate new results channel to receive ObjectInfo.
objInfoCh := make(chan ObjectInfo)
// Walk through all objects
if err := objectAPI.Walk(ctx, bucket, "", objInfoCh); err != nil {
return err
}
// reuse the fileScorer used by disk cache to score entries by
// ModTime to find the oldest objects in bucket to delete. In
// the context of bucket quota enforcement - number of hits are
// irrelevant.
scorer, err := newFileScorer(toFree, time.Now().Unix(), 1)
if err != nil {
return err
}
rcfg, _ := globalBucketObjectLockSys.Get(bucket)
for obj := range objInfoCh {
// skip objects currently under retention
if rcfg.LockEnabled && enforceRetentionForDeletion(ctx, obj) {
continue
}
scorer.addFile(obj.Name, obj.ModTime, obj.Size, 1)
}
var objects []string
numKeys := len(scorer.fileNames())
for i, key := range scorer.fileNames() {
objects = append(objects, key)
if len(objects) < maxObjectList && (i < numKeys-1) {
// skip deletion until maxObjectList or end of slice
continue
}
if len(objects) == 0 {
break
}
// Deletes a list of objects.
deleteErrs, err := objectAPI.DeleteObjects(ctx, bucket, objects)
if err != nil {
logger.LogIf(ctx, err)
} else {
for i := range deleteErrs {
if deleteErrs[i] != nil {
logger.LogIf(ctx, deleteErrs[i])
continue
}
// Notify object deleted event.
sendEvent(eventArgs{
EventName: event.ObjectRemovedDelete,
BucketName: bucket,
Object: ObjectInfo{
Name: objects[i],
},
Host: "Internal: [FIFO-QUOTA-EXPIRY]",
})
}
objects = nil
}
}
}
return nil
}