mirror of
https://github.com/minio/minio.git
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6d10f4c19a
* Rename GenericArgs to AuthRPCArgs * Rename GenericReply to AuthRPCReply * Remove authConfig.loginMethod and add authConfig.ServiceName * Rename loginServer to AuthRPCServer * Rename RPCLoginArgs to LoginRPCArgs * Rename RPCLoginReply to LoginRPCReply * Version and RequestTime are added to LoginRPCArgs and verified by server side, not client side. * Fix data race in lockMaintainence loop.
254 lines
6.9 KiB
Go
254 lines
6.9 KiB
Go
/*
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* Minio Cloud Storage, (C) 2016 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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"time"
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"github.com/minio/minio/pkg/disk"
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)
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const (
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// Attempt to retry only this many number of times before
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// giving up on the remote disk entirely during initialization.
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globalStorageInitRetryThreshold = 4
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// Attempt to retry only this many number of times before
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// giving up on the remote disk entirely after initialization.
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globalStorageRetryThreshold = 1
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)
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// Retry storage is an instance of StorageAPI which
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// additionally verifies upon network shutdown if the
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// underlying storage is available and is really
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// formatted.
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type retryStorage struct {
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remoteStorage StorageAPI
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maxRetryAttempts int
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retryUnit time.Duration
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retryCap time.Duration
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}
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// String representation of remoteStorage.
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func (f retryStorage) String() string {
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return f.remoteStorage.String()
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}
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// Reconncts to underlying remote storage.
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func (f retryStorage) Init() (err error) {
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return f.remoteStorage.Init()
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}
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// Closes the underlying remote storage connection.
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func (f retryStorage) Close() (err error) {
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return f.remoteStorage.Close()
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}
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// DiskInfo - a retryable implementation of disk info.
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func (f retryStorage) DiskInfo() (info disk.Info, err error) {
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info, err = f.remoteStorage.DiskInfo()
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if err == errDiskNotFound {
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err = f.reInit()
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if err == nil {
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return f.remoteStorage.DiskInfo()
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}
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}
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return info, err
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}
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// MakeVol - a retryable implementation of creating a volume.
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func (f retryStorage) MakeVol(volume string) (err error) {
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err = f.remoteStorage.MakeVol(volume)
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if err == errDiskNotFound {
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err = f.reInit()
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if err == nil {
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return f.remoteStorage.MakeVol(volume)
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}
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}
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return err
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}
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// ListVols - a retryable implementation of listing all the volumes.
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func (f retryStorage) ListVols() (vols []VolInfo, err error) {
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vols, err = f.remoteStorage.ListVols()
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if err == errDiskNotFound {
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err = f.reInit()
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if err == nil {
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return f.remoteStorage.ListVols()
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}
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}
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return vols, err
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}
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// StatVol - a retryable implementation of stating a volume.
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func (f retryStorage) StatVol(volume string) (vol VolInfo, err error) {
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vol, err = f.remoteStorage.StatVol(volume)
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if err == errDiskNotFound {
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err = f.reInit()
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if err == nil {
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return f.remoteStorage.StatVol(volume)
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}
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}
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return vol, err
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}
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// DeleteVol - a retryable implementation of deleting a volume.
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func (f retryStorage) DeleteVol(volume string) (err error) {
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err = f.remoteStorage.DeleteVol(volume)
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if err == errDiskNotFound {
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err = f.reInit()
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if err == nil {
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return f.remoteStorage.DeleteVol(volume)
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}
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}
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return err
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}
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// PrepareFile - a retryable implementation of preparing a file.
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func (f retryStorage) PrepareFile(volume, path string, length int64) (err error) {
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err = f.remoteStorage.PrepareFile(volume, path, length)
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if err == errDiskNotFound {
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err = f.reInit()
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if err == nil {
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return f.remoteStorage.PrepareFile(volume, path, length)
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}
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}
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return err
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}
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// AppendFile - a retryable implementation of append to a file.
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func (f retryStorage) AppendFile(volume, path string, buffer []byte) (err error) {
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err = f.remoteStorage.AppendFile(volume, path, buffer)
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if err == errDiskNotFound {
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err = f.reInit()
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if err == nil {
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return f.remoteStorage.AppendFile(volume, path, buffer)
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}
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}
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return err
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}
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// StatFile - a retryable implementation of stating a file.
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func (f retryStorage) StatFile(volume, path string) (fileInfo FileInfo, err error) {
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fileInfo, err = f.remoteStorage.StatFile(volume, path)
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if err == errDiskNotFound {
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err = f.reInit()
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if err == nil {
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return f.remoteStorage.StatFile(volume, path)
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}
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}
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return fileInfo, err
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}
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// ReadAll - a retryable implementation of reading all the content from a file.
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func (f retryStorage) ReadAll(volume, path string) (buf []byte, err error) {
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buf, err = f.remoteStorage.ReadAll(volume, path)
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if err == errDiskNotFound {
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err = f.reInit()
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if err == nil {
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return f.remoteStorage.ReadAll(volume, path)
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}
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}
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return buf, err
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}
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// ReadFile - a retryable implementation of reading at offset from a file.
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func (f retryStorage) ReadFile(volume, path string, offset int64, buffer []byte) (m int64, err error) {
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m, err = f.remoteStorage.ReadFile(volume, path, offset, buffer)
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if err == errDiskNotFound {
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err = f.reInit()
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if err == nil {
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return f.remoteStorage.ReadFile(volume, path, offset, buffer)
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}
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}
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return m, err
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}
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// ListDir - a retryable implementation of listing directory entries.
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func (f retryStorage) ListDir(volume, path string) (entries []string, err error) {
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entries, err = f.remoteStorage.ListDir(volume, path)
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if err == errDiskNotFound {
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err = f.reInit()
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if err == nil {
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return f.remoteStorage.ListDir(volume, path)
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}
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}
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return entries, err
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}
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// DeleteFile - a retryable implementation of deleting a file.
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func (f retryStorage) DeleteFile(volume, path string) (err error) {
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err = f.remoteStorage.DeleteFile(volume, path)
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if err == errDiskNotFound {
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err = f.reInit()
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if err == nil {
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return f.remoteStorage.DeleteFile(volume, path)
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}
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}
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return err
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}
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// RenameFile - a retryable implementation of renaming a file.
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func (f retryStorage) RenameFile(srcVolume, srcPath, dstVolume, dstPath string) (err error) {
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err = f.remoteStorage.RenameFile(srcVolume, srcPath, dstVolume, dstPath)
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if err == errDiskNotFound {
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err = f.reInit()
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if err == nil {
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return f.remoteStorage.RenameFile(srcVolume, srcPath, dstVolume, dstPath)
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}
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}
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return err
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}
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// Connect and attempt to load the format from a disconnected node,
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// attempts three times before giving up.
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func (f retryStorage) reInit() (err error) {
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// Close the underlying connection.
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f.remoteStorage.Close() // Error here is purposefully ignored.
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doneCh := make(chan struct{})
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defer close(doneCh)
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for i := range newRetryTimer(f.retryUnit, f.retryCap, MaxJitter, doneCh) {
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// Initialize and make a new login attempt.
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err = f.remoteStorage.Init()
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if err != nil {
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// No need to return error until the retry count
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// threshold has reached.
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if i < f.maxRetryAttempts {
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continue
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}
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return err
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}
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// Attempt to load format to see if the disk is really
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// a formatted disk and part of the cluster.
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_, err = loadFormat(f.remoteStorage)
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if err != nil {
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// No need to return error until the retry count
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// threshold has reached.
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if i < f.maxRetryAttempts {
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continue
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}
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return err
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}
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// Login and loading format was a success, break and proceed forward.
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break
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}
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return err
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}
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