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
|
/**
* Copyright (C) 2021-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include <string>
#include <vector>
#include <boost/filesystem/operations.hpp>
#include <fmt/format.h>
#include "mongo/client/dbclient_connection.h"
#include "mongo/db/cursor_id.h"
#include "mongo/db/namespace_string.h"
#include "mongo/db/operation_context.h"
#include "mongo/db/repl/oplog.h"
#include "mongo/db/repl/tenant_migration_shared_data.h"
#include "mongo/db/storage/wiredtiger/wiredtiger_import.h"
#include "mongo/executor/scoped_task_executor.h"
#include "mongo/util/cancellation.h"
#include "mongo/util/concurrency/thread_pool.h"
namespace mongo::repl::shard_merge_utils {
inline constexpr StringData kDonatedFilesPrefix = "donatedFiles."_sd;
inline constexpr StringData kImportDoneMarkerPrefix = "importDoneMarker."_sd;
inline constexpr StringData kMigrationTmpDirPrefix = "migrationTmpFiles"_sd;
inline constexpr StringData kMigrationIdFieldName = "migrationId"_sd;
inline constexpr StringData kBackupIdFieldName = "backupId"_sd;
inline constexpr StringData kDonorFieldName = "donor"_sd;
inline constexpr StringData kDonorDbPathFieldName = "dbpath"_sd;
inline bool isDonatedFilesCollection(const NamespaceString& ns) {
return ns.isConfigDB() && ns.coll().startsWith(kDonatedFilesPrefix);
}
inline NamespaceString getDonatedFilesNs(const UUID& migrationUUID) {
return NamespaceString::makeGlobalConfigCollection(kDonatedFilesPrefix +
migrationUUID.toString());
}
inline NamespaceString getImportDoneMarkerNs(const UUID& migrationUUID) {
return NamespaceString::makeLocalCollection(kImportDoneMarkerPrefix + migrationUUID.toString());
}
inline boost::filesystem::path fileClonerTempDir(const UUID& migrationId) {
return boost::filesystem::path(storageGlobalParams.dbpath) /
fmt::format("{}.{}", kMigrationTmpDirPrefix.toString(), migrationId.toString());
}
/**
* Represents the document structure of config.donatedFiles_<MigrationUUID> collection.
*/
struct MetadataInfo {
explicit MetadataInfo(const UUID& backupId,
const UUID& migrationId,
const std::string& donor,
const std::string& donorDbPath)
: backupId(backupId), migrationId(migrationId), donor(donor), donorDbPath(donorDbPath) {}
UUID backupId;
UUID migrationId;
std::string donor;
std::string donorDbPath;
static MetadataInfo constructMetadataInfo(const UUID& migrationId,
const std::string& donor,
const BSONObj& obj) {
auto backupId = UUID(uassertStatusOK(UUID::parse(obj[kBackupIdFieldName])));
auto donorDbPath = obj[kDonorDbPathFieldName].String();
return MetadataInfo{backupId, migrationId, donor, donorDbPath};
}
BSONObj toBSON(const BSONObj& extraFields) const {
BSONObjBuilder bob;
migrationId.appendToBuilder(&bob, kMigrationIdFieldName);
backupId.appendToBuilder(&bob, kBackupIdFieldName);
bob.append(kDonorFieldName, donor);
bob.append(kDonorDbPathFieldName, donorDbPath);
bob.append("_id", OID::gen());
bob.appendElements(extraFields);
return bob.obj();
}
};
/**
* Helpers to create and drop the import done marker collection.
*/
void createImportDoneMarkerLocalCollection(OperationContext* opCtx, const UUID& migrationId);
void dropImportDoneMarkerLocalCollection(OperationContext* opCtx, const UUID& migrationId);
/**
* Copy a file from the donor.
*/
void cloneFile(OperationContext* opCtx,
DBClientConnection* clientConnection,
ThreadPool* writerPool,
TenantMigrationSharedData* sharedData,
const BSONObj& metadataDoc);
/**
* Import a donor collection after its files have been cloned to a temp dir.
*/
void wiredTigerImportFromBackupCursor(OperationContext* opCtx,
const UUID& migrationId,
const std::string& importPath,
std::vector<CollectionImportMetadata>&& metadatas);
/**
* Send a "getMore" to keep a backup cursor from timing out.
*/
SemiFuture<void> keepBackupCursorAlive(CancellationSource cancellationSource,
std::shared_ptr<executor::TaskExecutor> executor,
HostAndPort hostAndPort,
CursorId cursorId,
NamespaceString namespaceString);
} // namespace mongo::repl::shard_merge_utils
|
