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
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
|
/**
* Copyright (C) 2019-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.
*/
#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kReplicationInitialSync
#include "mongo/platform/basic.h"
#include "mongo/base/string_data.h"
#include "mongo/db/commands/list_collections_filter.h"
#include "mongo/db/repl/database_cloner.h"
#include "mongo/db/repl/database_cloner_common.h"
#include "mongo/db/repl/database_cloner_gen.h"
#include "mongo/logv2/log.h"
#include "mongo/util/assert_util.h"
namespace mongo {
namespace repl {
DatabaseCloner::DatabaseCloner(const std::string& dbName,
InitialSyncSharedData* sharedData,
const HostAndPort& source,
DBClientConnection* client,
StorageInterface* storageInterface,
ThreadPool* dbPool)
: InitialSyncBaseCloner(
"DatabaseCloner"_sd, sharedData, source, client, storageInterface, dbPool),
_dbName(dbName),
_listCollectionsStage("listCollections", this, &DatabaseCloner::listCollectionsStage) {
invariant(!dbName.empty());
_stats.dbname = dbName;
}
BaseCloner::ClonerStages DatabaseCloner::getStages() {
return {&_listCollectionsStage};
}
void DatabaseCloner::preStage() {
stdx::lock_guard<Latch> lk(_mutex);
_stats.start = getSharedData()->getClock()->now();
}
BaseCloner::AfterStageBehavior DatabaseCloner::listCollectionsStage() {
BSONObj res;
auto collectionInfos =
getClient()->getCollectionInfos(_dbName, ListCollectionsFilter::makeTypeCollectionFilter());
stdx::unordered_set<std::string> seen;
for (auto&& info : collectionInfos) {
ListCollectionResult result;
try {
result = ListCollectionResult::parse(
IDLParserErrorContext("DatabaseCloner::listCollectionsStage"), info);
} catch (const DBException& e) {
uasserted(
ErrorCodes::FailedToParse,
e.toStatus()
.withContext(str::stream() << "Collection info could not be parsed : " << info)
.reason());
}
NamespaceString collectionNamespace(_dbName, result.getName());
if (collectionNamespace.isSystem() && !collectionNamespace.isReplicated()) {
LOGV2_DEBUG(21146,
1,
"Skipping 'system' collection: {namespace}",
"Database cloner skipping 'system' collection",
"namespace"_attr = collectionNamespace.ns());
continue;
}
LOGV2_DEBUG(21147,
2,
"Allowing cloning of collectionInfo: {info}",
"Allowing cloning of collectionInfo",
"info"_attr = info);
bool isDuplicate = seen.insert(result.getName().toString()).second;
uassert(51005,
str::stream() << "collection info contains duplicate collection name "
<< "'" << result.getName() << "': " << info,
isDuplicate);
// While UUID is a member of CollectionOptions, listCollections does not return the
// collectionUUID there as part of the options, but instead places it in the 'info' field.
// We need to move it back to CollectionOptions to create the collection properly.
result.getOptions().uuid = result.getInfo().getUuid();
_collections.emplace_back(collectionNamespace, result.getOptions());
}
return kContinueNormally;
}
bool DatabaseCloner::isMyFailPoint(const BSONObj& data) const {
return data["database"].str() == _dbName && BaseCloner::isMyFailPoint(data);
}
void DatabaseCloner::postStage() {
{
stdx::lock_guard<Latch> lk(_mutex);
_stats.collections = _collections.size();
_stats.collectionStats.reserve(_collections.size());
for (const auto& coll : _collections) {
_stats.collectionStats.emplace_back();
_stats.collectionStats.back().ns = coll.first.ns();
}
}
for (const auto& coll : _collections) {
auto& sourceNss = coll.first;
auto& collectionOptions = coll.second;
{
stdx::lock_guard<Latch> lk(_mutex);
_currentCollectionCloner = std::make_unique<CollectionCloner>(sourceNss,
collectionOptions,
getSharedData(),
getSource(),
getClient(),
getStorageInterface(),
getDBPool());
}
auto collStatus = _currentCollectionCloner->run();
if (collStatus.isOK()) {
LOGV2_DEBUG(21148,
1,
"collection clone finished: {namespace}",
"Collection clone finished",
"namespace"_attr = sourceNss);
} else {
LOGV2_ERROR(21149,
"collection clone for '{namespace}' failed due to {error}",
"Collection clone failed",
"namespace"_attr = sourceNss,
"error"_attr = collStatus.toString());
setSyncFailedStatus({ErrorCodes::InitialSyncFailure,
collStatus
.withContext(str::stream() << "Error cloning collection '"
<< sourceNss.toString() << "'")
.toString()});
}
{
stdx::lock_guard<Latch> lk(_mutex);
_stats.collectionStats[_stats.clonedCollections] = _currentCollectionCloner->getStats();
_currentCollectionCloner = nullptr;
// Abort the database cloner if the collection clone failed.
if (!collStatus.isOK())
return;
_stats.clonedCollections++;
}
}
stdx::lock_guard<Latch> lk(_mutex);
_stats.end = getSharedData()->getClock()->now();
}
DatabaseCloner::Stats DatabaseCloner::getStats() const {
stdx::lock_guard<Latch> lk(_mutex);
DatabaseCloner::Stats stats = _stats;
if (_currentCollectionCloner) {
stats.collectionStats[_stats.clonedCollections] = _currentCollectionCloner->getStats();
}
return stats;
}
std::string DatabaseCloner::Stats::toString() const {
return toBSON().toString();
}
BSONObj DatabaseCloner::Stats::toBSON() const {
BSONObjBuilder bob;
bob.append("dbname", dbname);
append(&bob);
return bob.obj();
}
void DatabaseCloner::Stats::append(BSONObjBuilder* builder) const {
builder->appendNumber("collections", static_cast<long long>(collections));
builder->appendNumber("clonedCollections", static_cast<long long>(clonedCollections));
if (start != Date_t()) {
builder->appendDate("start", start);
if (end != Date_t()) {
builder->appendDate("end", end);
auto elapsed = end - start;
long long elapsedMillis = duration_cast<Milliseconds>(elapsed).count();
builder->appendNumber("elapsedMillis", elapsedMillis);
}
}
for (auto&& collection : collectionStats) {
BSONObjBuilder collectionBuilder(builder->subobjStart(collection.ns));
collection.append(&collectionBuilder);
collectionBuilder.doneFast();
}
}
} // namespace repl
} // namespace mongo
|
