| // 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. |
| |
| #ifndef __SLAVE_QOS_CONTROLLERS_LOAD_HPP__ |
| #define __SLAVE_QOS_CONTROLLERS_LOAD_HPP__ |
| |
| #include <list> |
| |
| #include <mesos/slave/qos_controller.hpp> |
| |
| #include <stout/lambda.hpp> |
| #include <stout/os/os.hpp> |
| #include <stout/try.hpp> |
| |
| #include <process/future.hpp> |
| #include <process/owned.hpp> |
| |
| namespace mesos { |
| namespace internal { |
| namespace slave { |
| |
| // Forward declaration. |
| class LoadQoSControllerProcess; |
| |
| |
| // The `LoadQoSController` is a simple QoS Controller, which is |
| // responsible for eviction of all the revocable executors when |
| // system load (5min or 15min) is above the configured threshold. |
| // NOTE: 1 minute system load is ignored, because |
| // for most use cases it is a misleading signal. |
| class LoadQoSController : public mesos::slave::QoSController |
| { |
| public: |
| // NOTE: In constructor we can pass lambda for fetching load average as |
| // an optional argument. This was done for the test purposes. |
| LoadQoSController( |
| const Option<double>& _loadThreshold5Min, |
| const Option<double>& _loadThreshold15Min, |
| const lambda::function<Try<os::Load>()>& _loadAverage = |
| [](){ return os::loadavg(); }) |
| : loadThreshold5Min(_loadThreshold5Min), |
| loadThreshold15Min(_loadThreshold15Min), |
| loadAverage(_loadAverage) {} |
| |
| ~LoadQoSController() override; |
| |
| Try<Nothing> initialize( |
| const lambda::function<process::Future<ResourceUsage>()>& usage) override; |
| |
| process::Future<std::list<mesos::slave::QoSCorrection>> corrections() |
| override; |
| |
| private: |
| const Option<double> loadThreshold5Min; |
| const Option<double> loadThreshold15Min; |
| const lambda::function<Try<os::Load>()> loadAverage; |
| process::Owned<LoadQoSControllerProcess> process; |
| }; |
| |
| } // namespace slave { |
| } // namespace internal { |
| } // namespace mesos { |
| |
| #endif // __SLAVE_QOS_CONTROLLERS_LOAD_HPP__ |