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fix(backup): add update_manifest tool (#7815)
This PR adds `dgraph updatemanifest` tool. This can be used to migrate the manifest of the backups taken on release/v21.03 or their parallels to the state after this change #7810
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,129 @@ | ||
| //go:build !oss | ||
| // +build !oss | ||
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| /* | ||
| * Copyright 2021 Dgraph Labs, Inc. and Contributors | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
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| package updatemanifest | ||
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| import ( | ||
| "encoding/binary" | ||
| "log" | ||
| "net/url" | ||
| "os" | ||
| "strings" | ||
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| "github.com/dgraph-io/dgraph/ee" | ||
| "github.com/dgraph-io/dgraph/protos/pb" | ||
| "github.com/dgraph-io/dgraph/worker" | ||
| "github.com/dgraph-io/dgraph/x" | ||
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| "github.com/pkg/errors" | ||
| "github.com/spf13/cobra" | ||
| ) | ||
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| var ( | ||
| logger = log.New(os.Stderr, "", 0) | ||
| // UpdateManifest is the sub-command invoked when running "dgraph update_manifest". | ||
| UpdateManifest x.SubCommand | ||
| ) | ||
|
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| var opt struct { | ||
| location string | ||
| key []byte | ||
| } | ||
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| func init() { | ||
| UpdateManifest.Cmd = &cobra.Command{ | ||
| Use: "update_manifest", | ||
| Short: "Run the Dgraph update tool to update the manifest from v21.03 to latest.", | ||
| Run: func(cmd *cobra.Command, args []string) { | ||
| if err := run(); err != nil { | ||
| logger.Fatalf("%v\n", err) | ||
| } | ||
| }, | ||
| Annotations: map[string]string{"group": "tool"}, | ||
| } | ||
| UpdateManifest.EnvPrefix = "DGRAPH_UPDATE_MANIFEST" | ||
| UpdateManifest.Cmd.SetHelpTemplate(x.NonRootTemplate) | ||
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| flag := UpdateManifest.Cmd.Flags() | ||
| flag.StringVarP(&opt.location, "location", "l", "", | ||
| `Sets the location of the backup. Both file URIs and s3 are supported. | ||
| This command will take care of all the full + incremental backups present in the location.`) | ||
| ee.RegisterEncFlag(flag) | ||
| } | ||
|
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| // Invalid bytes are replaced with the Unicode replacement rune. | ||
| // See https://golang.org/pkg/encoding/json/#Marshal | ||
| const replacementRune = rune('\ufffd') | ||
|
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| func parseNsAttr(attr string) (uint64, string, error) { | ||
| if strings.ContainsRune(attr, replacementRune) { | ||
| return 0, "", errors.New("replacement char found") | ||
| } | ||
| return binary.BigEndian.Uint64([]byte(attr[:8])), attr[8:], nil | ||
| } | ||
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| func run() error { | ||
| keys, err := ee.GetKeys(UpdateManifest.Conf) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| opt.key = keys.EncKey | ||
| uri, err := url.Parse(opt.location) | ||
| if err != nil { | ||
| return errors.Wrapf(err, "while parsing location") | ||
| } | ||
| handler, err := worker.NewUriHandler(uri, nil) | ||
| if err != nil { | ||
| return errors.Wrapf(err, "while creating uri handler") | ||
| } | ||
| masterManifest, err := worker.GetManifest(handler, uri) | ||
| if err != nil { | ||
| return errors.Wrapf(err, "while getting manifest") | ||
| } | ||
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| // Update the master manifest with the changes for drop operations and group predicates. | ||
| for _, manifest := range masterManifest.Manifests { | ||
| for gid, preds := range manifest.Groups { | ||
| parsedPreds := preds[:0] | ||
| for _, pred := range preds { | ||
| ns, attr, err := parseNsAttr(pred) | ||
| if err != nil { | ||
| logger.Printf("Unable to parse the pred: %v", pred) | ||
| continue | ||
| } | ||
| parsedPreds = append(parsedPreds, x.NamespaceAttr(ns, attr)) | ||
| } | ||
| manifest.Groups[gid] = parsedPreds | ||
| } | ||
| for _, op := range manifest.DropOperations { | ||
| if op.DropOp == pb.DropOperation_ATTR { | ||
| ns, attr, err := parseNsAttr(op.DropValue) | ||
| if err != nil { | ||
| logger.Printf("Unable to parse the drop operation %+v pred: %v", | ||
| op, []byte(op.DropValue)) | ||
| continue | ||
| } | ||
| op.DropValue = x.NamespaceAttr(ns, attr) | ||
| } | ||
| } | ||
| } | ||
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| // Rewrite the master manifest. | ||
| return errors.Wrap(worker.CreateManifest(handler, uri, masterManifest), "rewrite failed") | ||
| } |
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