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
218
219
220
221
222
223
224
225
226
227
228
229
230
231
|
/**
* Copyright (C) 2012 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* 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 GNU Affero General 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_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kSharding
#include "mongo/platform/basic.h"
#include "mongo/s/catalog/legacy/cluster_client_internal.h"
#include <vector>
#include "mongo/client/connpool.h"
#include "mongo/db/field_parser.h"
#include "mongo/s/catalog/catalog_manager.h"
#include "mongo/s/catalog/type_shard.h"
#include "mongo/s/type_mongos.h"
#include "mongo/util/log.h"
#include "mongo/util/stringutils.h"
namespace mongo {
using std::endl;
using std::string;
using std::unique_ptr;
using std::vector;
using mongoutils::str::stream;
Status checkClusterMongoVersions(CatalogManager* catalogManager,
const string& minMongoVersion) {
unique_ptr<ScopedDbConnection> connPtr;
//
// Find mongos pings in config server
//
try {
connPtr.reset(new ScopedDbConnection(catalogManager->connectionString(), 30));
ScopedDbConnection& conn = *connPtr;
unique_ptr<DBClientCursor> cursor(_safeCursor(conn->query(MongosType::ConfigNS,
Query())));
while (cursor->more()) {
BSONObj pingDoc = cursor->next();
MongosType ping;
string errMsg;
// NOTE: We don't care if the ping is invalid, legacy stuff will be
if (!ping.parseBSON(pingDoc, &errMsg)) {
warning() << "could not parse ping document: " << pingDoc << causedBy(errMsg)
<< endl;
continue;
}
string mongoVersion = "2.0";
// Hack to determine older mongos versions from ping format
if (ping.isWaitingSet()) mongoVersion = "2.2";
if (ping.isMongoVersionSet() && ping.getMongoVersion() != "") {
mongoVersion = ping.getMongoVersion();
}
Date_t lastPing = ping.getPing();
Minutes quietIntervalMins{0};
Date_t currentJsTime = jsTime();
if (currentJsTime >= lastPing) {
quietIntervalMins = duration_cast<Minutes>(currentJsTime - lastPing);
}
// We assume that anything that hasn't pinged in 5 minutes is probably down
if (quietIntervalMins >= Minutes{5}) {
log() << "stale mongos detected " << quietIntervalMins.count()
<< " minutes ago, network location is " << pingDoc["_id"].String()
<< ", not checking version";
}
else {
if (versionCmp(mongoVersion, minMongoVersion) < 0) {
return Status(ErrorCodes::RemoteValidationError,
stream() << "version " << mongoVersion
<< " detected on mongos at "
<< ping.getName()
<< ", but version >= " << minMongoVersion
<< " required; you must wait 5 minutes "
<< "after shutting down a pre-" << minMongoVersion
<< " mongos");
}
}
}
}
catch (const DBException& e) {
return e.toStatus("could not read mongos pings collection");
}
connPtr->done();
//
// Load shards from config server
//
vector<HostAndPort> servers;
try {
vector<ShardType> shards;
Status status = catalogManager->getAllShards(&shards);
if (!status.isOK()) {
return status;
}
for (const ShardType& shard : shards) {
Status status = shard.validate();
if (!status.isOK()) {
return Status(ErrorCodes::UnsupportedFormat,
stream() << "shard " << shard.toBSON()
<< " failed validation: " << causedBy(status));
}
const auto shardConnStatus = ConnectionString::parse(shard.getHost());
if (!shardConnStatus.isOK()) {
return Status(ErrorCodes::UnsupportedFormat,
stream() << "invalid shard host " << shard.getHost()
<< " read from the config server"
<< shardConnStatus.getStatus().toString());
}
vector<HostAndPort> shardServers = shardConnStatus.getValue().getServers();
servers.insert(servers.end(), shardServers.begin(), shardServers.end());
}
}
catch (const DBException& e) {
return e.toStatus("could not read shards collection");
}
// Add config servers to list of servers to check version against
vector<HostAndPort> configServers = catalogManager->connectionString().getServers();
servers.insert(servers.end(), configServers.begin(), configServers.end());
//
// We've now got all the shard info from the config server, start contacting the shards
// and config servers and verifying their versions.
//
for (vector<HostAndPort>::iterator serverIt = servers.begin();
serverIt != servers.end(); ++serverIt) {
// Note: This will *always* be a single-host connection
ConnectionString serverLoc(*serverIt);
dassert(serverLoc.type() == ConnectionString::MASTER ||
serverLoc.type() == ConnectionString::CUSTOM); // for dbtests
log() << "checking that version of host " << serverLoc << " is compatible with "
<< minMongoVersion << endl;
unique_ptr<ScopedDbConnection> serverConnPtr;
bool resultOk;
BSONObj buildInfo;
try {
serverConnPtr.reset(new ScopedDbConnection(serverLoc, 30));
ScopedDbConnection& serverConn = *serverConnPtr;
resultOk = serverConn->runCommand("admin",
BSON("buildInfo" << 1),
buildInfo);
}
catch (const DBException& e) {
warning() << "could not run buildInfo command on " << serverLoc.toString() << " "
<< causedBy(e) << ". Please ensure that this server is up and at a "
"version >= "
<< minMongoVersion;
continue;
}
// TODO: Make running commands saner such that we can consolidate error handling
if (!resultOk) {
return Status(ErrorCodes::UnknownError,
stream() << DBClientConnection::getLastErrorString(buildInfo)
<< causedBy(buildInfo.toString()));
}
serverConnPtr->done();
verify(buildInfo["version"].type() == String);
string mongoVersion = buildInfo["version"].String();
if (versionCmp(mongoVersion, minMongoVersion) < 0) {
return Status(ErrorCodes::RemoteValidationError,
stream() << "version " << mongoVersion << " detected on mongo "
"server at " << serverLoc.toString() <<
", but version >= " << minMongoVersion << " required");
}
}
return Status::OK();
}
// Helper function for safe cursors
DBClientCursor* _safeCursor(unique_ptr<DBClientCursor> cursor) {
// TODO: Make error handling more consistent, it's annoying that cursors error out by
// throwing exceptions *and* being empty
uassert(16625, str::stream() << "cursor not found, transport error", cursor.get());
return cursor.release();
}
}
|
