146 lines
3.6 KiB
Go
146 lines
3.6 KiB
Go
/*
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Copyright (c) 2017 VMware, Inc. All Rights Reserved.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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 object
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import (
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"bufio"
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"bytes"
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"context"
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"fmt"
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"io"
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"log"
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"path"
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"strings"
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"github.com/vmware/govmomi/vim25/soap"
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)
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// DatastoreFileManager combines FileManager and VirtualDiskManager to manage files on a Datastore
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type DatastoreFileManager struct {
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Datacenter *Datacenter
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Datastore *Datastore
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FileManager *FileManager
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VirtualDiskManager *VirtualDiskManager
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Force bool
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}
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// NewFileManager creates a new instance of DatastoreFileManager
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func (d Datastore) NewFileManager(dc *Datacenter, force bool) *DatastoreFileManager {
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c := d.Client()
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m := &DatastoreFileManager{
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Datacenter: dc,
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Datastore: &d,
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FileManager: NewFileManager(c),
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VirtualDiskManager: NewVirtualDiskManager(c),
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Force: force,
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}
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return m
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}
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// Delete dispatches to the appropriate Delete method based on file name extension
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func (m *DatastoreFileManager) Delete(ctx context.Context, name string) error {
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switch path.Ext(name) {
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case ".vmdk":
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return m.DeleteVirtualDisk(ctx, name)
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default:
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return m.DeleteFile(ctx, name)
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}
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}
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// DeleteFile calls FileManager.DeleteDatastoreFile
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func (m *DatastoreFileManager) DeleteFile(ctx context.Context, name string) error {
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p := m.Path(name)
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task, err := m.FileManager.DeleteDatastoreFile(ctx, p.String(), m.Datacenter)
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if err != nil {
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return err
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}
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return task.Wait(ctx)
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}
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// DeleteVirtualDisk calls VirtualDiskManager.DeleteVirtualDisk
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// Regardless of the Datastore type, DeleteVirtualDisk will fail if 'ddb.deletable=false',
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// so if Force=true this method attempts to set 'ddb.deletable=true' before starting the delete task.
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func (m *DatastoreFileManager) DeleteVirtualDisk(ctx context.Context, name string) error {
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p := m.Path(name)
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var merr error
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if m.Force {
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merr = m.markDiskAsDeletable(ctx, p)
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}
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task, err := m.VirtualDiskManager.DeleteVirtualDisk(ctx, p.String(), m.Datacenter)
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if err != nil {
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log.Printf("markDiskAsDeletable(%s): %s", p, merr)
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return err
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}
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return task.Wait(ctx)
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}
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// Path converts path name to a DatastorePath
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func (m *DatastoreFileManager) Path(name string) *DatastorePath {
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var p DatastorePath
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if !p.FromString(name) {
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p.Path = name
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p.Datastore = m.Datastore.Name()
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}
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return &p
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}
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func (m *DatastoreFileManager) markDiskAsDeletable(ctx context.Context, path *DatastorePath) error {
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r, _, err := m.Datastore.Download(ctx, path.Path, &soap.DefaultDownload)
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if err != nil {
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return err
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}
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defer r.Close()
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hasFlag := false
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buf := new(bytes.Buffer)
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s := bufio.NewScanner(&io.LimitedReader{R: r, N: 2048}) // should be only a few hundred bytes, limit to be sure
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for s.Scan() {
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line := s.Text()
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if strings.HasPrefix(line, "ddb.deletable") {
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hasFlag = true
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continue
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}
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fmt.Fprintln(buf, line)
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}
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if err := s.Err(); err != nil {
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return err // any error other than EOF
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}
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if !hasFlag {
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return nil // already deletable, so leave as-is
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}
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// rewrite the .vmdk with ddb.deletable flag removed (the default is true)
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return m.Datastore.Upload(ctx, buf, path.Path, &soap.DefaultUpload)
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}
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