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
|
/**
* Copyright (C) 2018-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::kSharding
#include "mongo/platform/basic.h"
#include "mongo/s/sharding_uptime_reporter.h"
#include "mongo/db/client.h"
#include "mongo/db/read_write_concern_defaults.h"
#include "mongo/db/server_options.h"
#include "mongo/logv2/log.h"
#include "mongo/s/balancer_configuration.h"
#include "mongo/s/catalog/type_mongos.h"
#include "mongo/s/grid.h"
#include "mongo/util/concurrency/idle_thread_block.h"
#include "mongo/util/exit.h"
#include "mongo/util/net/hostname_canonicalization.h"
#include "mongo/util/net/socket_utils.h"
#include "mongo/util/str.h"
#include "mongo/util/version.h"
namespace mongo {
namespace {
MONGO_FAIL_POINT_DEFINE(disableShardingUptimeReporterPeriodicThread);
const Seconds kUptimeReportInterval(10);
std::string constructInstanceIdString(const std::string& hostName) {
return str::stream() << hostName << ":" << serverGlobalParams.port;
}
/**
* Reports the uptime status of the current instance to the config.pings collection. This method
* is best-effort and never throws.
*/
void reportStatus(OperationContext* opCtx,
const std::string& instanceId,
const std::string& hostName,
const Timer& upTimeTimer) {
MongosType mType;
mType.setName(instanceId);
mType.setPing(jsTime());
mType.setUptime(upTimeTimer.seconds());
// balancer is never active in mongos. Here for backwards compatibility only.
mType.setWaiting(true);
mType.setMongoVersion(VersionInfoInterface::instance().version().toString());
mType.setAdvisoryHostFQDNs(
getHostFQDNs(hostName, HostnameCanonicalizationMode::kForwardAndReverse));
try {
uassertStatusOK(Grid::get(opCtx)->catalogClient()->updateConfigDocument(
opCtx,
MongosType::ConfigNS,
BSON(MongosType::name(instanceId)),
BSON("$set" << mType.toBSON()),
true,
ShardingCatalogClient::kMajorityWriteConcern));
} catch (const DBException& e) {
LOGV2(22875,
"Error while attempting to write this node's uptime to config.mongos: {error}",
"Error while attempting to write this node's uptime to config.mongos",
"error"_attr = e);
}
}
} // namespace
ShardingUptimeReporter::ShardingUptimeReporter() = default;
ShardingUptimeReporter::~ShardingUptimeReporter() {
// The thread must not be running when this object is destroyed
invariant(!_thread.joinable());
}
void ShardingUptimeReporter::startPeriodicThread() {
invariant(!_thread.joinable());
_thread = stdx::thread([] {
Client::initThread("Uptime-reporter");
const std::string hostName(getHostNameCached());
const std::string instanceId(constructInstanceIdString(hostName));
const Timer upTimeTimer;
while (!globalInShutdownDeprecated()) {
if (MONGO_unlikely(disableShardingUptimeReporterPeriodicThread.shouldFail())) {
LOGV2(426322,
"The sharding uptime reporter periodic thread is disabled for testing");
return;
}
{
auto opCtx = cc().makeOperationContext();
reportStatus(opCtx.get(), instanceId, hostName, upTimeTimer);
auto status = Grid::get(opCtx.get())
->getBalancerConfiguration()
->refreshAndCheck(opCtx.get());
if (!status.isOK()) {
LOGV2_WARNING(22876,
"Failed to refresh balancer settings from config server: {error}",
"Failed to refresh balancer settings from config server",
"error"_attr = status);
}
try {
ReadWriteConcernDefaults::get(opCtx.get()->getServiceContext())
.refreshIfNecessary(opCtx.get());
} catch (const DBException& ex) {
LOGV2_WARNING(
22877,
"Failed to refresh readConcern/writeConcern defaults from config server",
"error"_attr = redact(ex));
}
}
MONGO_IDLE_THREAD_BLOCK;
sleepFor(kUptimeReportInterval);
}
});
}
} // namespace mongo
|
