| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #include <mesos/module/resource_estimator.hpp> |
| |
| #include <mesos/slave/resource_estimator.hpp> |
| |
| #include <process/defer.hpp> |
| #include <process/dispatch.hpp> |
| #include <process/id.hpp> |
| #include <process/owned.hpp> |
| #include <process/process.hpp> |
| |
| #include <stout/lambda.hpp> |
| |
| using namespace mesos; |
| using namespace process; |
| |
| using mesos::modules::Module; |
| |
| using mesos::slave::ResourceEstimator; |
| |
| |
| class FixedResourceEstimatorProcess |
| : public Process<FixedResourceEstimatorProcess> |
| { |
| public: |
| FixedResourceEstimatorProcess( |
| const lambda::function<Future<ResourceUsage>()>& _usage, |
| const Resources& _totalRevocable) |
| : ProcessBase(process::ID::generate("fixed-resource-estimator")), |
| usage(_usage), |
| totalRevocable(_totalRevocable) {} |
| |
| Future<Resources> oversubscribable() |
| { |
| return usage().then(defer(self(), &Self::_oversubscribable, lambda::_1)); |
| } |
| |
| Future<Resources> _oversubscribable(const ResourceUsage& usage) |
| { |
| Resources allocatedRevocable; |
| foreach (const ResourceUsage::Executor& executor, usage.executors()) { |
| allocatedRevocable += Resources(executor.allocated()).revocable(); |
| } |
| |
| auto unallocated = [](const Resources& resources) { |
| Resources result = resources; |
| result.unallocate(); |
| return result; |
| }; |
| |
| return totalRevocable - unallocated(allocatedRevocable); |
| } |
| |
| protected: |
| const lambda::function<Future<ResourceUsage>()> usage; |
| const Resources totalRevocable; |
| }; |
| |
| |
| class FixedResourceEstimator : public ResourceEstimator |
| { |
| public: |
| FixedResourceEstimator(const Resources& _totalRevocable) |
| { |
| // Mark all resources as revocable. |
| foreach (Resource resource, _totalRevocable) { |
| resource.mutable_revocable(); |
| totalRevocable += resource; |
| } |
| } |
| |
| ~FixedResourceEstimator() override |
| { |
| if (process.get() != nullptr) { |
| terminate(process.get()); |
| wait(process.get()); |
| } |
| } |
| |
| Try<Nothing> initialize( |
| const lambda::function<Future<ResourceUsage>()>& usage) override |
| { |
| if (process.get() != nullptr) { |
| return Error("Fixed resource estimator has already been initialized"); |
| } |
| |
| process.reset(new FixedResourceEstimatorProcess(usage, totalRevocable)); |
| spawn(process.get()); |
| |
| return Nothing(); |
| } |
| |
| Future<Resources> oversubscribable() override |
| { |
| if (process.get() == nullptr) { |
| return Failure("Fixed resource estimator is not initialized"); |
| } |
| |
| return dispatch( |
| process.get(), |
| &FixedResourceEstimatorProcess::oversubscribable); |
| } |
| |
| private: |
| Resources totalRevocable; |
| Owned<FixedResourceEstimatorProcess> process; |
| }; |
| |
| |
| static bool compatible() |
| { |
| // TODO(jieyu): Check compatibility. |
| return true; |
| } |
| |
| |
| static ResourceEstimator* create(const Parameters& parameters) |
| { |
| // Obtain the *fixed* resources from parameters. |
| Option<Resources> resources; |
| foreach (const Parameter& parameter, parameters.parameter()) { |
| if (parameter.key() == "resources") { |
| Try<Resources> _resources = Resources::parse(parameter.value()); |
| if (_resources.isError()) { |
| return nullptr; |
| } |
| |
| resources = _resources.get(); |
| } |
| } |
| |
| if (resources.isNone()) { |
| return nullptr; |
| } |
| |
| return new FixedResourceEstimator(resources.get()); |
| } |
| |
| |
| Module<ResourceEstimator> org_apache_mesos_FixedResourceEstimator( |
| MESOS_MODULE_API_VERSION, |
| MESOS_VERSION, |
| "Apache Mesos", |
| "modules@mesos.apache.org", |
| "Fixed Resource Estimator Module.", |
| compatible, |
| create); |