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120 lines
3.2 KiB
120 lines
3.2 KiB
package shell
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import (
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"context"
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"flag"
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"fmt"
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"github.com/seaweedfs/seaweedfs/weed/filer"
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"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
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"github.com/seaweedfs/seaweedfs/weed/remote_storage"
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"github.com/seaweedfs/seaweedfs/weed/util"
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"io"
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"time"
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)
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func init() {
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Commands = append(Commands, &commandRemoteUnmount{})
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}
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type commandRemoteUnmount struct {
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}
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func (c *commandRemoteUnmount) Name() string {
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return "remote.unmount"
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}
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func (c *commandRemoteUnmount) Help() string {
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return `unmount remote storage
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# assume a remote storage is configured to name "s3_1"
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remote.configure -name=s3_1 -type=s3 -s3.access_key=xxx -s3.secret_key=yyy
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# mount and pull one bucket
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remote.mount -dir=/xxx -remote=s3_1/bucket
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# unmount the mounted directory and remove its cache
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remote.unmount -dir=/xxx
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`
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}
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func (c *commandRemoteUnmount) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
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remoteMountCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
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dir := remoteMountCommand.String("dir", "", "a directory in filer")
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if err = remoteMountCommand.Parse(args); err != nil {
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return nil
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}
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mappings, listErr := filer.ReadMountMappings(commandEnv.option.GrpcDialOption, commandEnv.option.FilerAddress)
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if listErr != nil {
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return listErr
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}
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if *dir == "" {
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return jsonPrintln(writer, mappings)
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}
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_, found := mappings.Mappings[*dir]
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if !found {
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return fmt.Errorf("directory %s is not mounted", *dir)
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}
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// store a mount configuration in filer
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fmt.Fprintf(writer, "deleting mount for %s ...\n", *dir)
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if err = filer.DeleteMountMapping(commandEnv, *dir); err != nil {
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return fmt.Errorf("delete mount mapping: %v", err)
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}
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// purge mounted data
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fmt.Fprintf(writer, "purge %s ...\n", *dir)
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if err = c.purgeMountedData(commandEnv, *dir); err != nil {
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return fmt.Errorf("purge mounted data: %v", err)
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}
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// reset remote sync offset in case the folder is mounted again
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if err = remote_storage.SetSyncOffset(commandEnv.option.GrpcDialOption, commandEnv.option.FilerAddress, *dir, time.Now().UnixNano()); err != nil {
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return fmt.Errorf("reset remote.sync offset for %s: %v", *dir, err)
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}
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return nil
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}
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func (c *commandRemoteUnmount) purgeMountedData(commandEnv *CommandEnv, dir string) error {
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// find existing directory, and ensure the directory is empty
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err := commandEnv.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error {
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parent, name := util.FullPath(dir).DirAndName()
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lookupResp, lookupErr := client.LookupDirectoryEntry(context.Background(), &filer_pb.LookupDirectoryEntryRequest{
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Directory: parent,
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Name: name,
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})
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if lookupErr != nil {
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return fmt.Errorf("lookup %s: %v", dir, lookupErr)
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}
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oldEntry := lookupResp.Entry
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deleteError := filer_pb.DoRemove(client, parent, name, true, true, true, false, nil)
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if deleteError != nil {
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return fmt.Errorf("delete %s: %v", dir, deleteError)
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}
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mkdirErr := filer_pb.DoMkdir(client, parent, name, func(entry *filer_pb.Entry) {
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entry.Attributes = oldEntry.Attributes
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entry.Extended = oldEntry.Extended
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entry.Attributes.Crtime = time.Now().Unix()
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entry.Attributes.Mtime = time.Now().Unix()
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})
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if mkdirErr != nil {
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return fmt.Errorf("mkdir %s: %v", dir, mkdirErr)
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}
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return nil
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})
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if err != nil {
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return err
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}
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return nil
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}
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