nebulous/optimiser-solver
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Change-Id: I631d374144efc540b158868fa65a0bac232a7548
---
Changed the comments for the SLO Violation handler
---
Performance update:
Adding a boolean flag to indicate when all metrics have been set to avoid a linear scan of all metrics on each SLO Violation message.
---
Metric list and reconfiguration wait
Metric updater now listening for a metric list from the Optimiser Controller and not frmo the EMS, and discards SLO Violations until the Optimiser Controller sends a message indicating that the previous application reconfiguration has finished.
---
Log message to indicate that the "reconfiguration done" even message has been received
---
Added the right topic for the metric list
---
New messages
Metric list from the controller
New message format for AMPL model definition
Fixed the AMQ message property settings
This commit is contained in:
Geir Horn 2024-03-20 19:13:27 +01:00 committed by Rudi Schlatte
parent f17b524c09
commit d2324e42a3
12 changed files with 348 additions and 221 deletions
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2
.gitignore vendored
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@ -3,3 +3,5 @@ __pycache__/
*.d
/SolverComponent
/ampl.lic
*.~1NiBF4kGEKO5WetCRbF0UOTl6FtAH2hiz-f9e028.insyncdl
*.insyncdl

12
.vscode/c_cpp_properties.json vendored
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@ -7,8 +7,12 @@
"/home/GHo/Documents/Code/CxxOpts/include",
"/opt/AMPL/amplapi/include/",
"${workspaceFolder}/**",
"/usr/lib/gcc/x86_64-redhat-linux/13/../../../../include/c++/13",
"/home/GHo/Documents/Code/Theron++"
"/home/GHo/Documents/Code/NebulOuS/Solvers",
"/usr/include/c++/13",
"/home/GHo/Documents/Code/Theron++",
"/usr/include/c++/13/x86_64-redhat-linux",
"/usr/include/linux",
"/usr/include/c++/13/tr1"
],
"defines": [],
"cStandard": "c23",
@ -29,7 +33,9 @@
"/home/GHo/Documents/Code/Theron++/",
"/home/GHo/Documents/Code/CxxOpts/include",
"/opt/AMPL/amplapi/include/",
"/usr/lib/gcc/x86_64-redhat-linux/13/../../../../include/c++/13"
"/usr/include/c++/13",
"/usr/include/linux",
"/home/GHo/Documents/Code/NebulOuS/Solvers"
],
"limitSymbolsToIncludedHeaders": false
}

105
AMPLSolver.cpp
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@ -31,50 +31,30 @@ namespace NebulOuS
// is received updating AMPL model parameters. Hence the common file creation
// is taken care of by a dedicated function.
std::string AMPLSolver::SaveFile( const JSON & TheMessage,
std::string AMPLSolver::SaveFile( std::string_view TheName,
std::string_view TheContent,
const std::source_location & Location )
{
if( TheMessage.is_object() )
std::string TheFileName = ProblemFileDirectory / TheName;
std::fstream TheFile( TheFileName, std::ios::out | std::ios::binary );
if( TheFile.is_open() )
{
std::string TheFileName
= ProblemFileDirectory / TheMessage.at( AMPLSolver::FileName );
std::fstream ProblemFile( TheFileName, std::ios::out | std::ios::binary );
if( ProblemFile.is_open() )
{
ProblemFile << TheMessage.at( AMPLSolver::FileContent ).get<std::string>();
ProblemFile.close();
return TheFileName;
}
else
{
std::source_location Location = std::source_location::current();
std::ostringstream ErrorMessage;
ErrorMessage << "[" << Location.file_name() << " at line "
<< Location.line()
<< "in function " << Location.function_name() <<"] "
<< "The AMPL file at "
<< TheFileName
<< " could not be opened for output!";
throw std::system_error( static_cast< int >( std::errc::io_error ),
std::system_category(), ErrorMessage.str() );
}
TheFile << TheContent;
TheFile.close();
return TheFileName;
}
else
{
std::source_location Location = std::source_location::current();
std::ostringstream ErrorMessage;
ErrorMessage << "[" << Location.file_name() << " at line "
<< Location.line()
<< "in function " << Location.function_name() <<"] "
<< "The JSON message is not an object. The received "
<< "message is " << std::endl
<< TheMessage.dump(2)
<< std::endl;
<< "The AMPL file at "
<< TheFileName
<< " could not be opened for output!";
throw std::system_error( static_cast< int >( std::errc::io_error ),
std::system_category(), ErrorMessage.str() );
@ -163,13 +143,18 @@ void AMPLSolver::DefineProblem(const Solver::OptimisationProblem & TheProblem,
// First storing the AMPL problem file from its definition in the message
// and read the file back to the AMPL interpreter.
ProblemDefinition.read( SaveFile( TheProblem ) );
ProblemDefinition.read( SaveFile(
TheProblem.at(
OptimisationProblem::Keys::ProblemFile ).get< std::string >() ,
TheProblem.at(
OptimisationProblem::Keys::ProblemDescription ).get< std::string >() ) );
// The next is to read the label of the default objective function and
// store this. An invalid argument exception is thrown if the field is missing
if( TheProblem.contains( Solver::ObjectiveFunctionLabel ) )
DefaultObjectiveFunction = TheProblem.at( Solver::ObjectiveFunctionLabel );
if( TheProblem.contains(OptimisationProblem::Keys::DefaultObjectiveFunction) )
DefaultObjectiveFunction
= TheProblem.at( OptimisationProblem::Keys::DefaultObjectiveFunction );
else
{
std::source_location Location = std::source_location::current();
@ -180,24 +165,44 @@ void AMPLSolver::DefineProblem(const Solver::OptimisationProblem & TheProblem,
<< "in function " << Location.function_name() <<"] "
<< "The problem definition must contain a default objective "
<< "function under the key ["
<< Solver::ObjectiveFunctionLabel
<< OptimisationProblem::Keys::DefaultObjectiveFunction
<< "]" << std::endl;
throw std::invalid_argument( ErrorMessage.str() );
}
// After all the manatory fields have been processed, the set of constants
// will be processed storing the mapping from variable value to constant.
// The default values for the data will be loaded from the data file. This
// operation is the same as the one done for data messages, and to avoid
// code duplication the handler is just invoked using the address of this
// solver Actor as the the sender is not important for this update.
if( TheProblem.contains( ConstantsLabel ) &&
TheProblem.at( ConstantsLabel ).is_object() )
if( TheProblem.contains( DataFileMessage::Keys::DataFile ) &&
TheProblem.contains( DataFileMessage::Keys::NewData ) )
{
std::string FileContent
= TheProblem.at( DataFileMessage::Keys::NewData ).get< std::string >();
if( !FileContent.empty() )
DataFileUpdate( DataFileMessage(
TheProblem.at( DataFileMessage::Keys::DataFile ).get< std::string >(),
FileContent ),
GetAddress() );
}
// The set of constants will be processed storing the mapping from a variable
// value to a constant.
if( TheProblem.contains( OptimisationProblem::Keys::Constants ) &&
TheProblem.at( OptimisationProblem::Keys::Constants ).is_object() )
for( const auto & [ ConstantName, ConstantRecord ] :
TheProblem.at( ConstantsLabel ).items() )
TheProblem.at( OptimisationProblem::Keys::Constants ).items() )
{
VariablesToConstants.emplace( ConstantRecord.at( VariableName ),
ConstantName );
VariablesToConstants.emplace(
ConstantRecord.at( OptimisationProblem::Keys::VariableName ),
ConstantName );
SetAMPLParameter( ConstantName,
ConstantRecord.at( InitialConstantValue ) );
ConstantRecord.at( OptimisationProblem::Keys::InitialConstantValue ) );
}
// Finally, the problem has been defined and the flag is set to allow
@ -215,10 +220,12 @@ void AMPLSolver::DefineProblem(const Solver::OptimisationProblem & TheProblem,
// the Define Problem message handler: The save file is used to store the
// received file, which is then loaded as the data problem.
void AMPLSolver::DataFileUpdate( const DataFileMessage & TheDataFile,
void AMPLSolver::DataFileUpdate( const DataFileMessage & NewData,
const Address TheOracle )
{
ProblemDefinition.readData( SaveFile( TheDataFile ) );
ProblemDefinition.readData( SaveFile(
NewData.at( DataFileMessage::Keys::DataFile ).get< std::string >(),
NewData.at( DataFileMessage::Keys::NewData ).get< std::string >() ) );
}
// -----------------------------------------------------------------------------
@ -385,7 +392,7 @@ AMPLSolver::AMPLSolver( const std::string & TheActorName,
Send( Theron::AMQ::NetworkLayer::TopicSubscription(
Theron::AMQ::NetworkLayer::TopicSubscription::Action::Subscription,
Theron::AMQ::TopicName( DataFileMessage::MessageIdentifier )
DataFileMessage::AMQTopic
), GetSessionLayerAddress() );
}
@ -397,7 +404,7 @@ AMPLSolver::~AMPLSolver()
if( HasNetwork() )
Send( Theron::AMQ::NetworkLayer::TopicSubscription(
Theron::AMQ::NetworkLayer::TopicSubscription::Action::CloseSubscription,
Theron::AMQ::TopicName( DataFileMessage::MessageIdentifier )
DataFileMessage::AMQTopic
), GetSessionLayerAddress() );
}

80
AMPLSolver.hpp
View File

@ -85,21 +85,18 @@ class AMPLSolver
// Utility methods
// --------------------------------------------------------------------------
//
// Since both the optimisation problem file and the data file(s) will be sent
// as JSON messages with a single key-value pair where the key is the filename
// and the value is the file content, there is a common dfinition of the
// problem file directory and a function to read the file. The function will
// throw errors if the JSON message given is not an object, or of there are
// issues opening the file name given. If the file could be successfully
// saved, the functino will close the file and return the file name for
// further processing.
// Since both the optimisation problem file and the data file(s) will arrive
// as messages containing the file name and the then the content of the file
// as a long text string. The following file will open the file for writing
// and save the content string to this file.
private:
const std::filesystem::path ProblemFileDirectory;
std::string SaveFile( const JSON & TheMessage,
const std::source_location & Location
std::string SaveFile( std::string_view TheName,
std::string_view TheContent,
const std::source_location & Location
= std::source_location::current() );
// There is also a utility function to look up a named AMPL parameter and
@ -130,28 +127,36 @@ protected:
virtual void DefineProblem( const Solver::OptimisationProblem & TheProblem,
const Address TheOracle ) override;
// The topic on which the problem file is posted is currently defined as a
// constant string
static constexpr std::string_view AMPLProblemTopic
= "eu.nebulouscloud.optimiser.solver.model";
// The JSON message received on this topic is supposed to contain several
// keys in the JSON message
// 1) The filename of the problem file
// 2) The file content as a single string
// 3) The default objective function (defined in the Solver class)
// 4) An optional constants section containing constant names as keys
// 3) The name of the initial data file
// 4) The content of the initial data file as a single string
// 5) The default objective function (defined in the Solver class)
// 6) An optional constants section containing constant names as keys
// and the values will be another map containing the variable
// whose value should be passed to the constant, and the initial
// value of the constant.
// Since these elements are parts of the optimisation problem message
// whose class cannot be extended to contain these directly, it is
// necessary to scope these keys differently for the compiler.
static constexpr std::string_view
FileName = "FileName",
FileContent = "FileContent",
ConstantsLabel = "Constants",
VariableName = "Variable",
InitialConstantValue = "Value";
struct OptimisationProblem
{
struct Keys
{
static constexpr std::string_view
ProblemFile = "ModelFileName",
ProblemDescription = "ModelFileContent",
DataFile = "DataFileName",
InitialisationData = "DataFileContent",
DefaultObjectiveFunction = "ObjectiveFunction",
Constants = "Constants",
VariableName = "Variable",
InitialConstantValue = "Value";
};
};
// Finally, no solution will be produced unless the problem has been
// defined. A flag is therefore set by the message handler indicating
@ -193,18 +198,27 @@ public:
{
public:
// The data files are assumed to be published on a dedicated topic for the
// optimiser
// The data files are assumed to be published by the performance module
// on a dedicated topic topic for the running solvers.
static constexpr std::string_view MessageIdentifier
= "eu.nebulouscloud.optimiser.solver.data";
static constexpr std::string_view AMQTopic
= "eu.nebulouscloud.optimiser.performancemodule.data";
// The received message will be a mapp supporting the following keys
// basically defining the data file name and its content.
DataFileMessage( const std::string & TheDataFileName,
struct Keys
{
static constexpr std::string_view
DataFile = "DataFileName",
NewData = "DataFileContent";
};
DataFileMessage( const std::string_view & TheDataFileName,
const JSON & DataFileContent )
: JSONTopicMessage( std::string( MessageIdentifier ),
{ { FileName, TheDataFileName },
{ FileContent, DataFileContent } } )
: JSONTopicMessage( AMQTopic,
{ { Keys::DataFile, TheDataFileName },
{ Keys::NewData, DataFileContent } } )
{}
DataFileMessage( const DataFileMessage & Other )
@ -212,7 +226,7 @@ public:
{}
DataFileMessage()
: JSONTopicMessage( std::string( MessageIdentifier ) )
: JSONTopicMessage( AMQTopic )
{}
virtual ~DataFileMessage() = default;

8
ExecutionControl.cpp
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@ -58,7 +58,7 @@ void ExecutionControl::StopMessageHandler( const StopMessage & Command,
std::lock_guard< std::mutex > Lock( TerminationLock );
Send( StatusMessage( StatusMessage::State::Stopped ),
Address( std::string( StatusTopic ) ) );
Address( StatusMessage::AMQTopic ) );
Send( Theron::Network::ShutDown(),
Theron::Network::GetAddress( Theron::Network::Layer::Session ) );
@ -83,11 +83,11 @@ ExecutionControl::ExecutionControl( const std::string & TheActorName )
Send( Theron::AMQ::NetworkLayer::TopicSubscription(
Theron::AMQ::NetworkLayer::TopicSubscription::Action::Publisher,
std::string( StatusTopic )
StatusMessage::AMQTopic
), GetSessionLayerAddress() );
Send( StatusMessage( StatusMessage::State::Starting ),
Address( std::string( StatusTopic ) ) );
Address( StatusMessage::AMQTopic ) );
}
@ -99,7 +99,7 @@ ExecutionControl::~ExecutionControl( void )
if( HasNetwork() )
Send( Theron::AMQ::NetworkLayer::TopicSubscription(
Theron::AMQ::NetworkLayer::TopicSubscription::Action::ClosePublisher,
std::string( StatusTopic )
StatusMessage::AMQTopic
), GetSessionLayerAddress() );
}

13
ExecutionControl.hpp
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@ -110,19 +110,20 @@ protected:
public:
// The status of the solver is communicated on the dedicated status topic
static constexpr std::string_view AMQTopic
= "eu.nebulouscloud.solver.state";
StatusMessage( State TheSituation,
std::string AdditionalInformation = std::string() )
: JSONMessage( std::string( StatusTopic ),
: JSONMessage( StatusMessage::AMQTopic,
{ {"when", UTCNow() }, {"state", ToString( TheSituation ) },
{"message", AdditionalInformation } } )
{}
};
// The status of the solver is communicated on the dedicated status topic
static constexpr std::string_view StatusTopic
= "eu.nebulouscloud.solver.state";
public:
// The function used to wait for the termination message simply waits on the

183
MetricUpdater.cpp
View File

@ -30,67 +30,66 @@ namespace NebulOuS
// Subscribing to metric prediction values
// --------------------------------------------------------------------------
//
// The received message must be a JSON object with metric names as
// attribute (keys) and the topic name as the value. Multiple metrics maby be
// included in the same message and and the andler will iterate and set up a
// subcription for each of the provided metrics. It should be noted that
// initially the metric has no value, and it is a prerequisite that all
// metric values must be updated before the complete set of metrics will be
// used for finding a better configuration for the application's execution
// context given by the metric values.
//
// The message is just considered if the version number of the message is larger
// than the version of the current set of metrics. The complicating factor is
// to deal with metrics that have changed in the case the metric version is
// increased. Then new metrics must be subscribed, deleted metrics must be
// unsubscribed, and values for kept metrics must be kept.
// The Optimiser controller defines the metric names used in the optimisatoin
// model, and the metric subscription will subscribe to these. It is allowed
// that the metric list may change during run-time, and therefore the message
// hadler will make subscriptions for new metrics and remove subscriptions for
// metrics that are not included in the list, but currently having
// subscriptions.
void MetricUpdater::AddMetricSubscription( const MetricTopic & TheMetrics,
const Address OptimiserController )
void MetricUpdater::AddMetricSubscription(
const MetricTopic & MetricDefinitions, const Address OptimiserController )
{
if( TheMetrics.is_object() &&
TheMetrics.at( NebulOuS::MetricList ).is_array() )
JSON TheMetrics = MetricDefinitions.at( MetricList );
if( TheMetrics.is_array() )
{
if( MetricsVersion < TheMetrics.at( MetricVersionCounter ).get<long int>() )
// The first step is to try inserting the metrics into the metric value
// map and if this is successful, a subscription is created for the
// publisherof this metric value. The metric names are recorded since
// some of them may correspond to known metrics, some of them may
// correspond to metrics that are new.
std::set< std::string > TheMetricNames;
for (auto & MetricRecord : TheMetrics )
{
// The first step is to try inserting the metrics into the metric value
// map and if this is successful, a subscription is created for the
// publisherof this metric value. The metric names are recorded since
// some of them may correspond to known metrics, some of them may
// correspond to metrics that are new.
auto [ MetricRecordPointer, MetricAdded ] = MetricValues.try_emplace(
MetricRecord.get<std::string>(), JSON() );
std::set< std::string > TheMetricNames;
TheMetricNames.insert( MetricRecordPointer->first );
for (auto & MetricRecord : TheMetrics.at( NebulOuS::MetricList ) )
// If a new metric was added, a subscription will be set up for this
// new metric, and the flag indicating that values have been received
// for all metrics will be reset since this new metric has yet to receive
// its first value
if( MetricAdded )
{
auto [ MetricRecordPointer, MetricAdded ] = MetricValues.try_emplace(
MetricRecord.at( NebulOuS::MetricName ).get<std::string>(), JSON() );
Send( Theron::AMQ::NetworkLayer::TopicSubscription(
Theron::AMQ::NetworkLayer::TopicSubscription::Action::Subscription,
std::string( MetricValueRootString ) + MetricRecordPointer->first ),
GetSessionLayerAddress() );
TheMetricNames.insert( MetricRecordPointer->first );
if( MetricAdded )
Send( Theron::AMQ::NetworkLayer::TopicSubscription(
Theron::AMQ::NetworkLayer::TopicSubscription::Action::Subscription,
std::string( MetricValueRootString ) + MetricRecordPointer->first ),
GetSessionLayerAddress() );
AllMetricValuesSet = false;
}
// There could be some metric value records that were defined by the
// previous metrics defined, but missing from the new metric set. If
// this is the case, the metric value records for the missing metrics
// should be unsubcribed and their metric records removed.
for( const auto & TheMetric : std::views::keys( MetricValues ) )
if( !TheMetricNames.contains( TheMetric ) )
{
Send( Theron::AMQ::NetworkLayer::TopicSubscription(
Theron::AMQ::NetworkLayer::TopicSubscription::Action::CloseSubscription,
std::string( MetricValueRootString ) + TheMetric ),
GetSessionLayerAddress() );
MetricValues.erase( TheMetric );
}
}
// There could be some metric value records that were defined by the
// previous metrics defined, but missing from the new metric set. If
// this is the case, the metric value records for the missing metrics
// should be unsubcribed and their metric records removed.
for( const auto & TheMetric : std::views::keys( MetricValues ) )
if( !TheMetricNames.contains( TheMetric ) )
{
Send( Theron::AMQ::NetworkLayer::TopicSubscription(
Theron::AMQ::NetworkLayer::TopicSubscription::Action::CloseSubscription,
std::string( MetricValueRootString ) + TheMetric ),
GetSessionLayerAddress() );
MetricValues.erase( TheMetric );
}
}
else
{
@ -99,7 +98,8 @@ void MetricUpdater::AddMetricSubscription( const MetricTopic & TheMetrics,
ErrorMessage << "[" << Location.file_name() << " at line " << Location.line()
<< " in function " << Location.function_name() <<"] "
<< "The message to define a new metric subscription is given as "
<< "The message to define the application's execution context "
<< "was given as: " << std::endl
<< std::endl << TheMetrics.dump(2) << std::endl
<< "this is not as expected!";
@ -163,8 +163,11 @@ void MetricUpdater::UpdateMetricValue(
// must look for this identifier type on the solutions in order to decide
// which solutions to deploy.
//
// The message will be ignored if not all metric values have been received,
// and no error message indication will be given.
// The message will be ignored if not all metric values have been received
// or if there are no metric values defined. In both cases the SLO violation
// message will just be ignored. In order to avoid the scan over all metrics
// to see if they are set, a boolean flag will be used and set once all metrics
// have values. Then future scans will be avoided.
void MetricUpdater::SLOViolationHandler(
const SLOViolation & SeverityMessage, const Address TheSLOTopic )
@ -173,23 +176,49 @@ void MetricUpdater::SLOViolationHandler(
Output << "Metric Updater: SLO violation received " << std::endl
<< SeverityMessage.dump(2) << std::endl;
// The application context can then be sent to the solution manager
// using the application execution context message provided that none of
// metric values are null indicating that no value has been received (yet)
// Thus, only if all metrics have values will the message be sent.
if( !MetricValues.empty() &&
std::ranges::none_of( MetricValues,
[](const auto & MetricRecord){ return MetricRecord.second.is_null(); } ))
if( !ReconfigurationInProgress &&
( AllMetricValuesSet ||
(!MetricValues.empty() &&
std::ranges::none_of( std::views::values( MetricValues ),
[](const auto & MetricValue){ return MetricValue.is_null(); } ))) )
{
Send( Solver::ApplicationExecutionContext(
SeverityMessage.at( NebulOuS::TimePoint ).get< Solver::TimePointType >(),
MetricValues, true
), TheSolverManager );
AllMetricValuesSet = true;
ReconfigurationInProgress = true;
}
else
Output << "... failed to forward the application execution context (size: "
<< MetricValues.size() << ")" << std::endl;
}
// --------------------------------------------------------------------------
// Reconfigured application
// --------------------------------------------------------------------------
//
// When the reconfiguration message is received it is an indication tha the
// Optimiser Controller has reconfigured the application and that the
// application is running in the new configuration found by the solver.
// It is the event that is important m not the content of the message, and
// it is therefore only used to reset the ongoing reconfiguration flag.
void MetricUpdater::ReconfigurationDone(
const ReconfigurationMessage & TheReconfiguraton,
const Address TheReconfigurationTopic )
{
Theron::ConsoleOutput Output;
ReconfigurationInProgress = false;
Output << "Reconfiguration ongoing flag reset after receiving the following "
<< "message indicating that the previous reconfiguration was"
<< "completed: " << std::endl
<< TheReconfiguraton.dump(2) << std::endl;
}
// --------------------------------------------------------------------------
// Constructor and destructor
// --------------------------------------------------------------------------
@ -199,28 +228,39 @@ void MetricUpdater::SLOViolationHandler(
// The message handlers are registered, and the the updater will then subscribe
// to the two topics published by the Optimisation Controller: One for the
// initial message defining the metrics and the associated topics to subscribe
// to for their values, and the second for receiving the SLO violation message.
// to for their values, and the second to know when a reconfiguration has been
// enacted based on a previously sent application execution context. One
// subscritpion is also made to receive the SLO violation message indicating
// that the running configuration is no longer valid and that a reconfiguration
// must be made.
MetricUpdater::MetricUpdater( const std::string UpdaterName,
const Address ManagerOfSolvers )
: Actor( UpdaterName ),
StandardFallbackHandler( Actor::GetAddress().AsString() ),
NetworkingActor( Actor::GetAddress().AsString() ),
MetricValues(), ValidityTime(0), TheSolverManager( ManagerOfSolvers ),
MetricsVersion(-1)
MetricValues(), ValidityTime(0), AllMetricValuesSet(false),
TheSolverManager( ManagerOfSolvers ),
ReconfigurationInProgress( false )
{
RegisterHandler( this, &MetricUpdater::AddMetricSubscription );
RegisterHandler( this, &MetricUpdater::UpdateMetricValue );
RegisterHandler( this, &MetricUpdater::SLOViolationHandler );
RegisterHandler( this, &MetricUpdater::ReconfigurationDone );
Send( Theron::AMQ::NetworkLayer::TopicSubscription(
Theron::AMQ::NetworkLayer::TopicSubscription::Action::Subscription,
std::string( NebulOuS::MetricSubscriptions ) ),
NebulOuS::MetricSubscriptions ),
GetSessionLayerAddress() );
Send( Theron::AMQ::NetworkLayer::TopicSubscription(
Theron::AMQ::NetworkLayer::TopicSubscription::Action::Subscription,
std::string( NebulOuS::SLOViolationTopic ) ),
NebulOuS::ReconfigurationTopic ),
GetSessionLayerAddress() );
Send( Theron::AMQ::NetworkLayer::TopicSubscription(
Theron::AMQ::NetworkLayer::TopicSubscription::Action::Subscription,
NebulOuS::SLOViolationTopic ),
GetSessionLayerAddress() );
}
@ -235,12 +275,17 @@ MetricUpdater::~MetricUpdater()
{
Send( Theron::AMQ::NetworkLayer::TopicSubscription(
Theron::AMQ::NetworkLayer::TopicSubscription::Action::CloseSubscription,
std::string( NebulOuS::MetricSubscriptions ) ),
NebulOuS::MetricSubscriptions ),
GetSessionLayerAddress() );
Send( Theron::AMQ::NetworkLayer::TopicSubscription(
Theron::AMQ::NetworkLayer::TopicSubscription::Action::CloseSubscription,
std::string( NebulOuS::SLOViolationTopic ) ),
NebulOuS::ReconfigurationTopic ),
GetSessionLayerAddress() );
Send( Theron::AMQ::NetworkLayer::TopicSubscription(
Theron::AMQ::NetworkLayer::TopicSubscription::Action::CloseSubscription,
NebulOuS::SLOViolationTopic ),
GetSessionLayerAddress() );
std::ranges::for_each( std::views::keys( MetricValues ),

98
MetricUpdater.hpp
View File

@ -88,16 +88,14 @@ constexpr std::string_view TimePoint = "predictionTime";
// defined next.
constexpr std::string_view MetricSubscriptions
= "eu.nebulouscloud.monitoring.metric_list";
= "eu.nebulouscloud.optimiser.controller.metric_list";
// The JSON message attribute for the list of metrics is another JSON object
// stored under the following key, see the Event type III defined in
// https://158.39.75.54/projects/nebulous-collaboration-hub/wiki/slo-severity-based-violation-detector
// where the name of the metric is defined under as sub-key.
constexpr std::string_view MetricList = "metric_list",
MetricName = "name",
MetricVersionCounter = "version";
constexpr std::string_view MetricList = "metrics";
// The metric value messages will be published on different topics and to
// check if an inbound message is from a metric value topic, it is necessary
@ -130,6 +128,14 @@ constexpr std::string_view MetricValueRootString
constexpr std::string_view SLOViolationTopic
= "eu.nebulouscloud.monitoring.slo.severity_value";
// When a reconfiguration has been enacted by the Optimiser Controller and
// a new configuration is confirmed to be running on the new platofrm, it will
// send a message to inform all other components that the reconfiguration
// has happened on the following topic.
constexpr std::string_view ReconfigurationTopic
= "eu.nebulouscloud.optimiser.adaptations";
/*==============================================================================
Metric Updater
@ -159,7 +165,7 @@ private:
// assumed that same metric name is used both for the optimisation model
// and for the metric topic.
std::unordered_map< Theron::AMQ::TopicName, JSON > MetricValues;
Solver::MetricValueType MetricValues;
// The metric values should ideally be forecasted for the same future time
// point, but this may not be assured, and as such a zero-order hold is
@ -172,24 +178,26 @@ private:
Solver::TimePointType ValidityTime;
// When an SLO violation message is received the current vector of metric
// values should be sent as an application execution context (message) to the
// Solution Manager actor that will invoke a solver to find the optimal
// configuration for this configuration. The Metric Updater must therefore
// know the address of the Soler Manager, and this must be passed to
// the constructor.
// There is also a flag to indicate when all metric values have received
// values since optimising for a application execution context defiend all
// metrics requires that at least one value is received for each metric. This
// condition could be tested before sending the request to find a new
// solution, but this means testing all metrics in a linear scan for a
// condition that will only happen initially until all metrics have been seen
// and so it is better for the performance if there is a flag to check for
// this condition.
const Address TheSolverManager;
bool AllMetricValuesSet;
// --------------------------------------------------------------------------
// Subscribing to metric prediction values
// --------------------------------------------------------------------------
//
// Initially, the Optimiser Controller will pass a message containing all
// optimiser metric names and the AMQ topic on which their values will be
// published. Essentially, these messages arrives as a JSON message with
// one attribute per metric, and where the value is the topic string for
// the value publisher.
// optimiser metric names that are used in the optimisation and therefore
// constitutes the application's execution context. This message is a simple
// JSON map containing an array since the Optimiser Controller is not able
// to send just an array.
class MetricTopic
: public Theron::AMQ::JSONTopicMessage
@ -211,22 +219,12 @@ private:
virtual ~MetricTopic() = default;
};
// The metric definition message "Event type III" of the EMS is sent every
// 60 seconds in order to inform new components or crashed components about
// the metrics. The version number of the message is a counter that indicates
// if the set of metrics has changed. Thus the message should be ignored
// as long as the version number stays the same. The version number of the
// current set of metrics is therefore cached to avoid redefining the
// metrics.
long int MetricsVersion;
// The handler for this message will check each attribute value of the
// received JSON struct, and those not already existing in the metric
// value map be added and a subscription made for the published
// prediction values.
void AddMetricSubscription( const MetricTopic & TheMetrics,
void AddMetricSubscription( const MetricTopic & MetricDefinitions,
const Address OptimiserController );
// --------------------------------------------------------------------------
@ -296,6 +294,52 @@ private:
void SLOViolationHandler( const SLOViolation & SeverityMessage,
const Address TheSLOTopic );
// The application execution context (message) will be sent to the
// Solution Manager actor that will invoke a solver to find the optimal
// configuration for this configuration. The Metric Updater must therefore
// know the address of the Solver Manager, and this must be passed to
// the constructor and stored for for the duration of the execution
const Address TheSolverManager;
// After the sending of the application's excution context, one should not
// initiate another reconfiguration because the state may the possibly be
// inconsistent with the SLO Violation Detector belieivng that the old
// configuration is still in effect while the new configuration is being
// enacted. It is therefore a flag that will be set by the SLO Violation
// handler indicating that a reconfiguration is ongoing.
bool ReconfigurationInProgress;
// When the reconfiguration has been done and the Optimizer Controller
// confirms that the application is running in a new configuration, it will
// send a reconfiguration completed message. This message will just be a
// JSON message.
class ReconfigurationMessage
: public Theron::AMQ::JSONTopicMessage
{
public:
ReconfigurationMessage( void )
: JSONTopicMessage( std::string( ReconfigurationTopic ) )
{}
ReconfigurationMessage( const ReconfigurationMessage & Other )
: JSONTopicMessage( Other )
{}
virtual ~ReconfigurationMessage() = default;
};
// The handler for this message will actually not use its contents, but only
// note that the reconfiguration has been completed to reset the
// reconfiguration in progress flag allowing future SLO Violation Events to
// triger new reconfigurations.
void ReconfigurationDone( const ReconfigurationMessage & TheReconfiguraton,
const Address TheReconfigurationTopic );
// --------------------------------------------------------------------------
// Constructor and destructor
// --------------------------------------------------------------------------

3
Solver.code-workspace
View File

@ -91,7 +91,8 @@
"valarray": "cpp",
"bitset": "cpp",
"regex": "cpp",
"syncstream": "cpp"
"syncstream": "cpp",
"expected": "cpp"
},
"gerrit.gitRepo": "/home/GHo/Documents/Code/NebulOuS/Solvers"
}

35
Solver.hpp
View File

@ -155,14 +155,20 @@ public:
{
public:
static constexpr std::string_view MessageIdentifier
// First the topic on which these messages will arrive is defined so that
// it can be used when subscribing.
static constexpr std::string_view AMQTopic
= "eu.nebulouscloud.optimiser.solver.context";
// The full constructor takes the time point, the objective function to
// solve for, and the application's execution context as the metric map
ApplicationExecutionContext( const TimePointType MicroSecondTimePoint,
const std::string ObjectiveFunctionID,
const MetricValueType & TheContext,
bool DeploySolution = false )
: JSONTopicMessage( std::string( MessageIdentifier ),
: JSONTopicMessage( std::string( AMQTopic ),
{ { std::string( TimeStamp ), MicroSecondTimePoint },
{ std::string( ObjectiveFunctionLabel ), ObjectiveFunctionID },
{ std::string( ExecutionContext ), TheContext },
@ -170,12 +176,13 @@ public:
}) {}
// The constructor omitting the objective function identifier is similar
// but without the objective function string.
// but without the objective function string implying that the default
// objective function should be used.
ApplicationExecutionContext( const TimePointType MicroSecondTimePoint,
const MetricValueType & TheContext,
bool DeploySolution = false )
: JSONTopicMessage( std::string( MessageIdentifier ),
: JSONTopicMessage( std::string( AMQTopic ),
{ { std::string( TimeStamp ), MicroSecondTimePoint },
{ std::string( ExecutionContext ), TheContext },
{ std::string( DeploymentFlag ), DeploySolution }
@ -191,7 +198,7 @@ public:
// The default constructor simply stores the message identifier
ApplicationExecutionContext()
: JSONTopicMessage( std::string( MessageIdentifier ) )
: JSONTopicMessage( std::string( AMQTopic ) )
{}
// The default destrucor is used
@ -240,7 +247,7 @@ public:
static constexpr std::string_view ObjectiveValues = "ObjectiveValues";
static constexpr std::string_view VariableValues = "VariableValues";
static constexpr std::string_view MessageIdentifier
static constexpr std::string_view AMQTopic
= "eu.nebulouscloud.optimiser.solver.solution";
Solution( const TimePointType MicroSecondTimePoint,
@ -248,7 +255,7 @@ public:
const ObjectiveValuesType & TheObjectiveValues,
const VariableValuesType & TheVariables,
bool DeploySolution )
: JSONTopicMessage( std::string( MessageIdentifier ) ,
: JSONTopicMessage( std::string( AMQTopic ) ,
{ { std::string( TimeStamp ), MicroSecondTimePoint },
{ std::string( ObjectiveFunctionLabel ), ObjectiveFunctionID },
{ std::string( ObjectiveValues ) , TheObjectiveValues },
@ -258,7 +265,7 @@ public:
{}
Solution()
: JSONTopicMessage( std::string( MessageIdentifier ) )
: JSONTopicMessage( std::string( AMQTopic ) )
{}
virtual ~Solution() = default;
@ -279,15 +286,15 @@ public:
{
public:
static constexpr std::string_view
MessageIdentifier = "eu.nebulouscloud.optimiser.solver.model";
static constexpr std::string_view AMQTopic
= "eu.nebulouscloud.optimiser.controller.model";
OptimisationProblem( const JSON & TheProblem )
: JSONTopicMessage( std::string( MessageIdentifier ), TheProblem )
: JSONTopicMessage( std::string( AMQTopic ), TheProblem )
{}
OptimisationProblem()
: JSONTopicMessage( std::string( MessageIdentifier ) )
: JSONTopicMessage( std::string( AMQTopic ) )
{}
virtual ~OptimisationProblem() = default;
@ -326,7 +333,7 @@ public:
Send( Theron::AMQ::NetworkLayer::TopicSubscription(
Theron::AMQ::NetworkLayer::TopicSubscription::Action::Subscription,
Theron::AMQ::TopicName( OptimisationProblem::MessageIdentifier )
OptimisationProblem::AMQTopic
), GetSessionLayerAddress() );
}
@ -337,7 +344,7 @@ public:
if( HasNetwork() )
Send( Theron::AMQ::NetworkLayer::TopicSubscription(
Theron::AMQ::NetworkLayer::TopicSubscription::Action::CloseSubscription,
Theron::AMQ::TopicName( OptimisationProblem::MessageIdentifier )
OptimisationProblem::AMQTopic
), GetSessionLayerAddress() );
}
};

24
SolverComponent.cpp
View File

@ -95,6 +95,7 @@ License: MPL2.0 (https://www.mozilla.org/en-US/MPL/2.0/)
#include "proton/message.hpp" // AMQ messages definitions
#include "proton/source_options.hpp" // App ID filters
#include "proton/source.hpp" // The filter map
#include "proton/types.hpp" // Type definitions
#include "Communication/AMQ/AMQMessage.hpp" // The AMQP messages
#include "Communication/AMQ/AMQEndpoint.hpp" // The AMP endpoint
#include "Communication/AMQ/AMQjson.hpp" // Transparent JSON-AMQP
@ -213,8 +214,7 @@ int main( int NumberOfCLIOptions, char ** CLIOptionStrings )
virtual proton::connection_options ConnectionOptions(void) const override
{
proton::connection_options Options(
Theron::AMQ::NetworkLayer::AMQProperties::ConnectionOptions() );
proton::connection_options Options( AMQProperties::ConnectionOptions() );
Options.user( User );
Options.password( Password );
@ -235,8 +235,7 @@ int main( int NumberOfCLIOptions, char ** CLIOptionStrings )
proton::symbol FilterKey("selector");
proton::value FilterValue;
proton::codec::encoder EncodedFilter( FilterValue );
proton::receiver_options TheOptions(
Theron::AMQ::NetworkLayer::AMQProperties::ReceiverOptions() );
proton::receiver_options TheOptions( AMQProperties::ReceiverOptions() );
std::ostringstream SelectorString;
@ -255,17 +254,18 @@ int main( int NumberOfCLIOptions, char ** CLIOptionStrings )
}
// The application identifier must also be provided in every message to
// allow other receivers to filter on this.
// allow other receivers to filter on this. First will the default
// properties from the base class be set before the new application
// identifier property will be added.
virtual proton::message::property_map MessageProperties(
virtual std::map<std::string, proton::scalar> MessageProperties(
const proton::message::property_map & CurrentProperties
= proton::message::property_map() ) const override
{
proton::message::property_map TheProperties(
Theron::AMQ::NetworkLayer::AMQProperties::MessageProperties(
CurrentProperties ));
std::map<std::string, proton::scalar>
TheProperties( AMQProperties::MessageProperties( CurrentProperties ) );
TheProperties.put( "application", ApplicationID );
TheProperties["application"] = ApplicationID;
return TheProperties;
}
@ -332,8 +332,8 @@ int main( int NumberOfCLIOptions, char ** CLIOptionStrings )
NebulOuS::SolverManager< NebulOuS::AMPLSolver >
WorkloadMabager( CLIValues["Name"].as<std::string>(),
std::string( NebulOuS::Solver::Solution::MessageIdentifier ),
std::string( NebulOuS::Solver::ApplicationExecutionContext::MessageIdentifier ),
NebulOuS::Solver::Solution::AMQTopic,
NebulOuS::Solver::ApplicationExecutionContext::AMQTopic,
1, "AMPLSolver",
ampl::Environment( TheAMPLDirectory.native() ), ModelDirectory,
CLIValues["Solver"].as<std::string>() );

4
SolverManager.hpp
View File

@ -193,7 +193,7 @@ private:
void PublishSolution( const Solver::Solution & TheSolution,
const Address TheSolver )
{
Send( TheSolution, SolutionReceiver );
Send( TheSolution, Address( SolutionReceiver ) );
PassiveSolvers.insert( ActiveSolvers.extract( TheSolver ) );
DispatchToSolvers();
}
@ -274,7 +274,7 @@ public:
Send( ExecutionControl::StatusMessage(
ExecutionControl::StatusMessage::State::Started
), Address( std::string( ExecutionControl::StatusTopic ) ) );
), Address( ExecutionControl::StatusMessage::AMQTopic ) );
}
else
{