1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
|
package shell
import (
"context"
"flag"
"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 -v -o t.meta / # save from the root, output to t.meta file.
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) {
fsMetaSaveCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
verbose := fsMetaSaveCommand.Bool("v", false, "print out each processed files")
outputFileName := fsMetaSaveCommand.String("o", "", "output the meta data to this file")
if err = fsMetaSaveCommand.Parse(args); err != nil {
return nil
}
filerServer, filerPort, path, err := commandEnv.parseUrl(findInputDirectory(fsMetaSaveCommand.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 := *outputFileName
if fileName == "" {
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++
}
if *verbose {
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
}
|
