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c69a07a858
* Revert #6655. 20220407-031010-renxuan-c101052c21da8346 compressed=True data_size=31004844 duration=4310801 ended=100000 fail_fast=10 max_runs=100000 pass=100000 priority=100 remaining=0 runtime=1:04:15 sanity=False started=100047 stopped=20220407-041425 submitted=20220407-031010 timeout=5400 username=renxuan * Revert #6271. 20220407-051532-renxuan-470f0fe6aac1c217 compressed=True data_size=30982370 duration=3491067 ended=100002 fail_fast=10 max_runs=100000 pass=100002 priority=100 remaining=0 runtime=0:59:57 sanity=False started=100141 stopped=20220407-061529 submitted=20220407-051532 timeout=5400 username=renxuan * Revert #6266. Remove resolving-related functionalities in connection string. Connection string will be used for storing purpose only, and non-mutable. 20220407-175119-renxuan-55d30ee1a4b42c2f compressed=True data_size=30970443 duration=5437659 ended=100000 fail_fast=10 max_runs=100000 pass=100000 priority=100 remaining=0 runtime=0:59:31 sanity=False started=100154 stopped=20220407-185050 submitted=20220407-175119 timeout=5400 username=renxuan * Add hostname to coordinator interfaces. * Turn on the new hostname logic. * Add the corresponding change in config txns. The most notable change is before calling basicLoadBalance(), we need to call tryInitializeRequestStream() to initialize request streams first. Passed correctness tests. * Return error when hostnames cannot be resolved in coordinators command. * Minor fixes.
79 lines
3.7 KiB
C++
79 lines
3.7 KiB
C++
/*
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* LeaderElection.h
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*
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* This source file is part of the FoundationDB open source project
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*
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* Copyright 2013-2022 Apple Inc. and the FoundationDB project authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef FDBSERVER_LEADERELECTION_H
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#define FDBSERVER_LEADERELECTION_H
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#pragma once
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#include "fdbrpc/fdbrpc.h"
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#include "fdbrpc/Locality.h"
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#include "fdbclient/FDBTypes.h"
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class ServerCoordinators;
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// Participates in the given coordination group's leader election process, nominating the given
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// LeaderInterface (presumed to be a local interface) as leader. The leader election process is
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// "sticky" - once a leader becomes leader, as long as its communications with other processes are
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// good it will remain leader. The outKnownLeader variable is updated to reflect a best guess of
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// the current leader. If the proposed interface becomes the leader, the outKnownLeader will be
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// set to the proposedInterface, and then if it is displaced by another leader, the return value will
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// eventually be set. If the return value is cancelled, the candidacy or leadership of the proposedInterface
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// will eventually end.
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template <class LeaderInterface>
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Future<Void> tryBecomeLeader(ServerCoordinators const& coordinators,
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LeaderInterface const& proposedInterface,
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Reference<AsyncVar<Optional<LeaderInterface>>> const& outKnownLeader,
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bool hasConnected,
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Reference<AsyncVar<ClusterControllerPriorityInfo>> const& asyncPriorityInfo);
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// Inform all the coordinators that they have been replaced with a new connection string
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Future<Void> changeLeaderCoordinators(ServerCoordinators const& coordinators, Value const& forwardingInfo);
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#ifndef __INTEL_COMPILER
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#pragma region Implementation
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#endif // __INTEL_COMPILER
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Future<Void> tryBecomeLeaderInternal(ServerCoordinators const& coordinators,
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Value const& proposedSerializedInterface,
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Reference<AsyncVar<Value>> const& outSerializedLeader,
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bool const& hasConnected,
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Reference<AsyncVar<ClusterControllerPriorityInfo>> const& asyncPriorityInfo);
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template <class LeaderInterface>
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Future<Void> tryBecomeLeader(ServerCoordinators const& coordinators,
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LeaderInterface const& proposedInterface,
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Reference<AsyncVar<Optional<LeaderInterface>>> const& outKnownLeader,
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bool hasConnected,
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Reference<AsyncVar<ClusterControllerPriorityInfo>> const& asyncPriorityInfo) {
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auto serializedInfo = makeReference<AsyncVar<Value>>();
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Future<Void> m = tryBecomeLeaderInternal(coordinators,
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ObjectWriter::toValue(proposedInterface, IncludeVersion()),
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serializedInfo,
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hasConnected,
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asyncPriorityInfo);
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return m || asyncDeserialize(serializedInfo, outKnownLeader);
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}
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#ifndef __INTEL_COMPILER
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#pragma endregion
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#endif // __INTEL_COMPILER
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#endif
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