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/**
* 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.
*/
#include "mongo/dbtests/config_server_fixture.h"
#include "mongo/s/catalog/config_server_version.h"
#include "mongo/s/catalog/legacy/cluster_client_internal.h"
#include "mongo/s/catalog/legacy/config_upgrade.h"
#include "mongo/s/catalog/type_chunk.h"
#include "mongo/s/catalog/type_config_version.h"
#include "mongo/s/catalog/type_mongos.h"
#include "mongo/s/catalog/type_settings.h"
#include "mongo/s/catalog/type_shard.h"
#include "mongo/s/chunk_version.h"
#include "mongo/s/grid.h"
#include "mongo/unittest/unittest.h"
#include "mongo/util/version.h"
namespace mongo {
using std::string;
namespace {
/**
* Specialization of the config server fixture with helpers for the tests below.
*/
class ConfigUpgradeFixture : public ConfigServerFixture {
public:
void stopBalancer() {
// Note: The balancer key is needed in the update portion, for some reason related to
// DBDirectClient
DBDirectClient client(&_txn);
client.update(SettingsType::ConfigNS,
BSON(SettingsType::key(SettingsType::BalancerDocKey)),
BSON(SettingsType::key(SettingsType::BalancerDocKey)
<< SettingsType::balancerStopped(true)),
true,
false);
}
/**
* Stores a legacy { version : X } config server entry
*/
void storeLegacyConfigVersion(int version) {
if (version == 0)
return;
DBDirectClient client(&_txn);
if (version == 1) {
ShardType shard;
shard.setName("test");
shard.setHost("$dummy:10000");
client.insert(ShardType::ConfigNS, shard.toBSON());
return;
}
client.insert(VersionType::ConfigNS, BSON("_id" << 1 << "version" << version));
}
VersionType loadLegacyConfigVersion() {
DBDirectClient client(&_txn);
return unittest::assertGet(
VersionType::fromBSON(client.findOne(VersionType::ConfigNS, BSONObj())));
}
/**
* Stores a newer { version, minVersion, currentVersion, clusterId } config server entry
*/
void storeConfigVersion(const VersionType& versionInfo) {
DBDirectClient client(&_txn);
client.insert(VersionType::ConfigNS, versionInfo.toBSON());
}
/**
* Stores a newer { version, minVersion, currentVersion, clusterId } config server entry.
*
* @return clusterId
*/
OID storeConfigVersion(int configVersion) {
if (configVersion < CURRENT_CONFIG_VERSION) {
storeLegacyConfigVersion(configVersion);
return OID();
}
VersionType version;
version.setMinCompatibleVersion(configVersion);
version.setCurrentVersion(configVersion);
OID clusterId = OID::gen();
version.setClusterId(clusterId);
storeConfigVersion(version);
return clusterId;
}
/**
* Stores sample shard and ping information at the current version.
*/
void storeShardsAndPings(int numShards, int numPings) {
DBDirectClient client(&_txn);
for (int i = 0; i < numShards; i++) {
ShardType shard;
shard.setName(OID::gen().toString());
shard.setHost((string)(str::stream() << "$dummyShard:" << (i + 1) << "0000"));
client.insert(ShardType::ConfigNS, shard.toBSON());
}
time_t started = time(0);
for (int i = 0; i < numPings; i++) {
MongosType ping;
ping.setName((string)(str::stream() << "$dummyMongos:" << (i + 1) << "0000"));
ping.setPing(jsTime());
ping.setUptime(time(0) - started);
ping.setWaiting(false);
ping.setMongoVersion(versionString);
ping.setConfigVersion(CURRENT_CONFIG_VERSION);
if (i % 2 == 0) {
ping.setPing(ping.getPing() - Minutes(10));
}
client.insert(MongosType::ConfigNS, ping.toBSON());
}
}
};
//
// Tests for upgrading the config server between versions.
//
// In general these tests do pretty minimal validation of the config server data itself, but
// do ensure that the upgrade mechanism is working correctly w.r.t the config.version
// collection.
//
// Rename the fixture so that our tests have a useful name in the executable
typedef ConfigUpgradeFixture ConfigUpgradeTests;
TEST_F(ConfigUpgradeTests, EmptyVersion) {
//
// Tests detection of empty config version
//
// Zero version (no version doc)
VersionType oldVersion;
Status status = getConfigVersion(grid.catalogManager(&_txn), &oldVersion);
ASSERT(status.isOK());
ASSERT_EQUALS(oldVersion.getMinCompatibleVersion(), 0);
ASSERT_EQUALS(oldVersion.getCurrentVersion(), 0);
}
TEST_F(ConfigUpgradeTests, ClusterIDVersion) {
//
// Tests detection of newer config versions
//
VersionType newVersion;
newVersion.setMinCompatibleVersion(MIN_COMPATIBLE_CONFIG_VERSION);
newVersion.setCurrentVersion(CURRENT_CONFIG_VERSION);
storeConfigVersion(newVersion);
newVersion.clear();
// Current Version w/o clusterId (invalid!)
Status status = getConfigVersion(grid.catalogManager(&_txn), &newVersion);
ASSERT(!status.isOK());
newVersion.clear();
OID clusterId = OID::gen();
newVersion.setClusterId(clusterId);
newVersion.setMinCompatibleVersion(MIN_COMPATIBLE_CONFIG_VERSION);
newVersion.setCurrentVersion(CURRENT_CONFIG_VERSION);
clearVersion();
storeConfigVersion(newVersion);
newVersion.clear();
// Current version w/ clusterId (valid!)
status = getConfigVersion(grid.catalogManager(&_txn), &newVersion);
ASSERT(status.isOK());
ASSERT_EQUALS(newVersion.getMinCompatibleVersion(), MIN_COMPATIBLE_CONFIG_VERSION);
ASSERT_EQUALS(newVersion.getCurrentVersion(), CURRENT_CONFIG_VERSION);
ASSERT_EQUALS(newVersion.getClusterId(), clusterId);
}
TEST_F(ConfigUpgradeTests, InitialUpgrade) {
//
// Tests initializing the config server to the initial version
//
string errMsg;
ASSERT_OK(grid.catalogManager(&_txn)->initConfigVersion(&_txn));
VersionType version;
ASSERT_OK(getConfigVersion(grid.catalogManager(&_txn), &version));
ASSERT_EQUALS(MIN_COMPATIBLE_CONFIG_VERSION, version.getMinCompatibleVersion());
ASSERT_EQUALS(CURRENT_CONFIG_VERSION, version.getCurrentVersion());
ASSERT_TRUE(version.getClusterId().isSet());
}
TEST_F(ConfigUpgradeTests, BadVersionUpgrade) {
//
// Tests that we can't upgrade from a config version we don't have an upgrade path for
//
stopBalancer();
storeLegacyConfigVersion(1);
// Default version (not upgradeable)
ASSERT_EQ(ErrorCodes::IncompatibleShardingMetadata,
grid.catalogManager(&_txn)->initConfigVersion(&_txn));
}
} // namespace
} // namespace mongo
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