seaweedfs/weed/shell/command_volume_copy.go

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package shell
import (
"flag"
"fmt"
"io"
"github.com/chrislusf/seaweedfs/weed/storage/needle"
)
func init() {
Commands = append(Commands, &commandVolumeCopy{})
}
type commandVolumeCopy struct {
}
func (c *commandVolumeCopy) Name() string {
return "volume.copy"
}
func (c *commandVolumeCopy) Help() string {
return `copy a volume from one volume server to another volume server
volume.copy -source <source volume server host:port> -target <target volume server host:port> -volumeId <volume id>
This command copies a volume from one volume server to another volume server.
Usually you will want to unmount the volume first before copying.
`
}
func (c *commandVolumeCopy) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
if err = commandEnv.confirmIsLocked(); err != nil {
return
}
volCopyCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
volumeIdInt := volCopyCommand.Int("volumeId", 0, "the volume id")
sourceNodeStr := volCopyCommand.String("source", "", "the source volume server <host>:<port>")
targetNodeStr := volCopyCommand.String("target", "", "the target volume server <host>:<port>")
if err = volCopyCommand.Parse(args); err != nil {
return nil
}
sourceVolumeServer, targetVolumeServer := *sourceNodeStr, *targetNodeStr
volumeId := needle.VolumeId(*volumeIdInt)
if sourceVolumeServer == targetVolumeServer {
return fmt.Errorf("source and target volume servers are the same!")
}
_, err = copyVolume(commandEnv.option.GrpcDialOption, volumeId, sourceVolumeServer, targetVolumeServer, "")
return
}