mirror of
https://github.com/seaweedfs/seaweedfs.git
synced 2024-12-25 18:27:54 +08:00
151 lines
3.6 KiB
Go
151 lines
3.6 KiB
Go
package shell
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"io"
|
|
"os"
|
|
"time"
|
|
|
|
"github.com/chrislusf/seaweedfs/weed/filer2"
|
|
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
|
|
"github.com/chrislusf/seaweedfs/weed/util"
|
|
"github.com/golang/protobuf/proto"
|
|
)
|
|
|
|
func init() {
|
|
Commands = append(Commands, &commandFsMetaSave{})
|
|
}
|
|
|
|
type commandFsMetaSave struct {
|
|
}
|
|
|
|
func (c *commandFsMetaSave) Name() string {
|
|
return "fs.meta.save"
|
|
}
|
|
|
|
func (c *commandFsMetaSave) Help() string {
|
|
return `save all directory and file meta data to a local file for metadata backup.
|
|
|
|
fs.meta.save / # save from the root
|
|
fs.meta.save /path/to/save # save from the directory /path/to/save
|
|
fs.meta.save . # save from current directory
|
|
fs.meta.save # save from current directory
|
|
|
|
The meta data will be saved into a local <filer_host>-<port>-<time>.meta file.
|
|
These meta data can be later loaded by fs.meta.load command,
|
|
|
|
This assumes there are no deletions, so this is different from taking a snapshot.
|
|
|
|
`
|
|
}
|
|
|
|
func (c *commandFsMetaSave) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
|
|
|
|
filerServer, filerPort, path, err := commandEnv.parseUrl(findInputDirectory(args))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
ctx := context.Background()
|
|
|
|
return commandEnv.withFilerClient(ctx, filerServer, filerPort, func(client filer_pb.SeaweedFilerClient) error {
|
|
|
|
t := time.Now()
|
|
fileName := fmt.Sprintf("%s-%d-%4d%02d%02d-%02d%02d%02d.meta",
|
|
filerServer, filerPort, t.Year(), t.Month(), t.Day(), t.Hour(), t.Minute(), t.Second())
|
|
|
|
dst, err := os.OpenFile(fileName, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
|
|
if err != nil {
|
|
return nil
|
|
}
|
|
defer dst.Close()
|
|
|
|
var dirCount, fileCount uint64
|
|
|
|
sizeBuf := make([]byte, 4)
|
|
|
|
err = doTraverse(ctx, writer, client, filer2.FullPath(path), func(parentPath filer2.FullPath, entry *filer_pb.Entry) error {
|
|
|
|
protoMessage := &filer_pb.FullEntry{
|
|
Dir: string(parentPath),
|
|
Entry: entry,
|
|
}
|
|
|
|
bytes, err := proto.Marshal(protoMessage)
|
|
if err != nil {
|
|
return fmt.Errorf("marshall error: %v", err)
|
|
}
|
|
|
|
util.Uint32toBytes(sizeBuf, uint32(len(bytes)))
|
|
|
|
dst.Write(sizeBuf)
|
|
dst.Write(bytes)
|
|
|
|
if entry.IsDirectory {
|
|
dirCount++
|
|
} else {
|
|
fileCount++
|
|
}
|
|
|
|
println(parentPath.Child(entry.Name))
|
|
|
|
return nil
|
|
|
|
})
|
|
|
|
if err == nil {
|
|
fmt.Fprintf(writer, "\ntotal %d directories, %d files", dirCount, fileCount)
|
|
fmt.Fprintf(writer, "\nmeta data for http://%s:%d%s is saved to %s\n", filerServer, filerPort, path, fileName)
|
|
}
|
|
|
|
return err
|
|
|
|
})
|
|
|
|
}
|
|
func doTraverse(ctx context.Context, writer io.Writer, client filer_pb.SeaweedFilerClient, parentPath filer2.FullPath, fn func(parentPath filer2.FullPath, entry *filer_pb.Entry) error) (err error) {
|
|
|
|
paginatedCount := -1
|
|
startFromFileName := ""
|
|
paginateSize := 1000
|
|
|
|
for paginatedCount == -1 || paginatedCount == paginateSize {
|
|
resp, listErr := client.ListEntries(ctx, &filer_pb.ListEntriesRequest{
|
|
Directory: string(parentPath),
|
|
Prefix: "",
|
|
StartFromFileName: startFromFileName,
|
|
InclusiveStartFrom: false,
|
|
Limit: uint32(paginateSize),
|
|
})
|
|
if listErr != nil {
|
|
err = listErr
|
|
return
|
|
}
|
|
|
|
paginatedCount = len(resp.Entries)
|
|
|
|
for _, entry := range resp.Entries {
|
|
|
|
if err = fn(parentPath, entry); err != nil {
|
|
return err
|
|
}
|
|
|
|
if entry.IsDirectory {
|
|
subDir := fmt.Sprintf("%s/%s", parentPath, entry.Name)
|
|
if parentPath == "/" {
|
|
subDir = "/" + entry.Name
|
|
}
|
|
if err = doTraverse(ctx, writer, client, filer2.FullPath(subDir), fn); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
startFromFileName = entry.Name
|
|
|
|
}
|
|
}
|
|
|
|
return
|
|
|
|
}
|