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205 lines
5.7 KiB
205 lines
5.7 KiB
/*
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* MinIO Cloud Storage, (C) 2016, 2017, 2018 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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"sort"
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"strings"
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"github.com/minio/minio/cmd/logger"
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"github.com/minio/minio/pkg/bpool"
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"github.com/minio/minio/pkg/dsync"
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"github.com/minio/minio/pkg/madmin"
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xnet "github.com/minio/minio/pkg/net"
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"github.com/minio/minio/pkg/sync/errgroup"
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)
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// XL constants.
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const (
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// XL metadata file carries per object metadata.
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xlMetaJSONFile = "xl.json"
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)
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// OfflineDisk represents an unavailable disk.
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var OfflineDisk StorageAPI // zero value is nil
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// xlObjects - Implements XL object layer.
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type xlObjects struct {
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// getDisks returns list of storageAPIs.
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getDisks func() []StorageAPI
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// getLockers returns list of remote and local lockers.
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getLockers func() []dsync.NetLocker
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// Locker mutex map.
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nsMutex *nsLockMap
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// Byte pools used for temporary i/o buffers.
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bp *bpool.BytePoolCap
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// TODO: Deprecated only kept here for tests, should be removed in future.
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storageDisks []StorageAPI
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// TODO: ListObjects pool management, should be removed in future.
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listPool *TreeWalkPool
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}
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// NewNSLock - initialize a new namespace RWLocker instance.
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func (xl xlObjects) NewNSLock(ctx context.Context, bucket string, object string) RWLocker {
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return xl.nsMutex.NewNSLock(ctx, xl.getLockers(), bucket, object)
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}
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// Shutdown function for object storage interface.
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func (xl xlObjects) Shutdown(ctx context.Context) error {
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// Add any object layer shutdown activities here.
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closeStorageDisks(xl.getDisks())
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closeLockers(xl.getLockers())
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return nil
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}
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// byDiskTotal is a collection satisfying sort.Interface.
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type byDiskTotal []DiskInfo
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func (d byDiskTotal) Len() int { return len(d) }
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func (d byDiskTotal) Swap(i, j int) { d[i], d[j] = d[j], d[i] }
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func (d byDiskTotal) Less(i, j int) bool {
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return d[i].Total < d[j].Total
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}
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// getDisksInfo - fetch disks info across all other storage API.
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func getDisksInfo(disks []StorageAPI) (disksInfo []DiskInfo, onlineDisks, offlineDisks madmin.BackendDisks) {
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disksInfo = make([]DiskInfo, len(disks))
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g := errgroup.WithNErrs(len(disks))
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for index := range disks {
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index := index
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g.Go(func() error {
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if disks[index] == nil {
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// Storage disk is empty, perhaps ignored disk or not available.
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return errDiskNotFound
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}
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info, err := disks[index].DiskInfo()
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if err != nil {
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if IsErr(err, baseErrs...) {
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return err
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}
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reqInfo := (&logger.ReqInfo{}).AppendTags("disk", disks[index].String())
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ctx := logger.SetReqInfo(context.Background(), reqInfo)
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logger.LogIf(ctx, err)
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}
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disksInfo[index] = info
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return nil
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}, index)
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}
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getPeerAddress := func(diskPath string) (string, error) {
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hostPort := strings.Split(diskPath, SlashSeparator)[0]
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// Host will be empty for xl/fs disk paths.
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if hostPort == "" {
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return "", nil
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}
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thisAddr, err := xnet.ParseHost(hostPort)
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if err != nil {
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return "", err
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}
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return thisAddr.String(), nil
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}
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onlineDisks = make(madmin.BackendDisks)
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offlineDisks = make(madmin.BackendDisks)
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// Wait for the routines.
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for i, err := range g.Wait() {
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peerAddr, pErr := getPeerAddress(disksInfo[i].RelativePath)
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if pErr != nil {
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continue
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}
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if _, ok := offlineDisks[peerAddr]; !ok {
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offlineDisks[peerAddr] = 0
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}
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if _, ok := onlineDisks[peerAddr]; !ok {
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onlineDisks[peerAddr] = 0
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}
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if err != nil {
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offlineDisks[peerAddr]++
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continue
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}
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onlineDisks[peerAddr]++
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}
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// Success.
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return disksInfo, onlineDisks, offlineDisks
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}
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// returns sorted disksInfo slice which has only valid entries.
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// i.e the entries where the total size of the disk is not stated
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// as 0Bytes, this means that the disk is not online or ignored.
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func sortValidDisksInfo(disksInfo []DiskInfo) []DiskInfo {
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var validDisksInfo []DiskInfo
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for _, diskInfo := range disksInfo {
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if diskInfo.Total == 0 {
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continue
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}
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validDisksInfo = append(validDisksInfo, diskInfo)
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}
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sort.Sort(byDiskTotal(validDisksInfo))
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return validDisksInfo
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}
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// Get an aggregated storage info across all disks.
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func getStorageInfo(disks []StorageAPI) StorageInfo {
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disksInfo, onlineDisks, offlineDisks := getDisksInfo(disks)
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// Sort so that the first element is the smallest.
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validDisksInfo := sortValidDisksInfo(disksInfo)
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// If there are no valid disks, set total and free disks to 0
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if len(validDisksInfo) == 0 {
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return StorageInfo{}
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}
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// Combine all disks to get total usage
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usedList := make([]uint64, len(validDisksInfo))
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totalList := make([]uint64, len(validDisksInfo))
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availableList := make([]uint64, len(validDisksInfo))
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mountPaths := make([]string, len(validDisksInfo))
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for i, di := range validDisksInfo {
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usedList[i] = di.Used
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totalList[i] = di.Total
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availableList[i] = di.Free
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mountPaths[i] = di.RelativePath
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}
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storageInfo := StorageInfo{
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Used: usedList,
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Total: totalList,
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Available: availableList,
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MountPaths: mountPaths,
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}
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storageInfo.Backend.Type = BackendErasure
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storageInfo.Backend.OnlineDisks = onlineDisks
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storageInfo.Backend.OfflineDisks = offlineDisks
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return storageInfo
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}
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// StorageInfo - returns underlying storage statistics.
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func (xl xlObjects) StorageInfo(ctx context.Context) StorageInfo {
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return getStorageInfo(xl.getDisks())
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}
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