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FS: remove .minio directory if .minio/multipart is empty. (#1899)
fixes #1886
This commit is contained in:
parent
de1c7d33eb
commit
e2743d05e8
20
fs-v1.go
20
fs-v1.go
@ -49,6 +49,22 @@ func loadFormatFS(storageDisk StorageAPI) ([]byte, error) {
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return readAll(storageDisk, minioMetaBucket, fsFormatJSONFile)
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return readAll(storageDisk, minioMetaBucket, fsFormatJSONFile)
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}
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}
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// Should be called when process shuts down.
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func shutdownFS(storage StorageAPI) {
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_, err := storage.ListDir(minioMetaBucket, mpartMetaPrefix)
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if err != errFileNotFound {
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// Multipart directory is not empty hence do not remove .minio volume.
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os.Exit(0)
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}
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prefix := ""
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if err := cleanupDir(storage, minioMetaBucket, prefix); err != nil {
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os.Exit(0)
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return
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}
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storage.DeleteVol(minioMetaBucket)
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os.Exit(0)
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}
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// newFSObjects - initialize new fs object layer.
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// newFSObjects - initialize new fs object layer.
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func newFSObjects(disk string) (ObjectLayer, error) {
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func newFSObjects(disk string) (ObjectLayer, error) {
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storage, err := newStorageAPI(disk)
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storage, err := newStorageAPI(disk)
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@ -72,6 +88,10 @@ func newFSObjects(disk string) (ObjectLayer, error) {
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return nil, err
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return nil, err
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}
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}
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}
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}
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// Register the callback that should be called when the process shuts down.
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registerShutdown(func() {
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shutdownFS(storage)
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})
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// Return successfully initialized object layer.
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// Return successfully initialized object layer.
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return fsObjects{
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return fsObjects{
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storage: storage,
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storage: storage,
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@ -17,9 +17,11 @@
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package main
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package main
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import (
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import (
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"os"
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"path/filepath"
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"path/filepath"
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"strings"
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"strings"
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"sync"
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"sync"
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"syscall"
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)
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)
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const (
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const (
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@ -27,6 +29,17 @@ const (
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blockSizeV1 = 10 * 1024 * 1024 // 10MiB.
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blockSizeV1 = 10 * 1024 * 1024 // 10MiB.
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)
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)
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// Register callback functions that needs to be called when process shutsdown.
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// For now, SIGINT triggers the callbacks, in future controller can trigger
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// shutdown callbacks.
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func registerShutdown(callback func()) {
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go func() {
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trapCh := signalTrap(os.Interrupt, syscall.SIGTERM)
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<-trapCh
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callback()
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}()
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}
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// House keeping code needed for FS.
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// House keeping code needed for FS.
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func fsHouseKeeping(storageDisk StorageAPI) error {
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func fsHouseKeeping(storageDisk StorageAPI) error {
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// Attempt to create `.minio`.
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// Attempt to create `.minio`.
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49
signals.go
Normal file
49
signals.go
Normal file
@ -0,0 +1,49 @@
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/*
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* Minio Client, (C) 2015 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 main
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import (
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"os"
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"os/signal"
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)
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// signalTrap traps the registered signals and notifies the caller.
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func signalTrap(sig ...os.Signal) <-chan bool {
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// channel to notify the caller.
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trapCh := make(chan bool, 1)
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go func(chan<- bool) {
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// channel to receive signals.
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sigCh := make(chan os.Signal, 1)
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defer close(sigCh)
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// `signal.Notify` registers the given channel to
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// receive notifications of the specified signals.
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signal.Notify(sigCh, sig...)
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// Wait for the signal.
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<-sigCh
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// Once signal has been received stop signal Notify handler.
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signal.Stop(sigCh)
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// Notify the caller.
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trapCh <- true
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}(trapCh)
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return trapCh
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}
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