internal void StartConfigUpdateDeliveryToAppInstanceMgr(AppInstanceManager appInstanceMgr)
{
this.appInstanceMgr = appInstanceMgr;
bool result = this.windowsFabricApplicationCreated.Set();
if (false == result)
{
Utility.TraceSource.WriteError(
TraceType,
"Error setting event to indicate that config updates can be delivered to app instance manager.");
}
Utility.TraceSource.WriteInfo(
TraceType,
"Configuration change delivery to application instance manager is enabled.");
}
internal ContainerManager(AppInstanceManager appInstanceManager, ContainerEnvironment containerEnvironment)
{
this.appInstanceManager = appInstanceManager;
this.containerEnvironment = containerEnvironment;
Utility.TraceSource.WriteInfo(
TraceType,
"Watching directory for creation of new container trace folders {0}",
this.containerEnvironment.ContainerLogRootDirectory);
// Watcher needs to be created before startup listing of folders
// Otherwise there is the risk a file will be created between the two and it will be missed.
// WriteLock is created so prevent race condition with file watchers
this.processingMarkersRWLock.EnterWriteLock();
try
{
if (Directory.Exists(this.containerEnvironment.ContainerLogRootDirectory))
{
this.CreateContainerFolderWacher();
foreach (var directory in Directory.EnumerateDirectories(this.containerEnvironment.ContainerLogRootDirectory))
{
this.ContainerLogFolderProcessingStartup(directory);
}
}
else
{
Utility.TraceSource.WriteError(
TraceType,
"Not monitoring directory for creation of new container trace folders since directory doesn't exist {0}",
this.containerEnvironment.ContainerLogRootDirectory);
}
}
finally
{
this.processingMarkersRWLock.ExitWriteLock();
}
// Arm the cleanup timer.
this.cleanupTimer = new DcaTimer(
ContainerManager.TraceType,
new TimerCallback(this.BackgroundCleanup),
(long)this.containerEnvironment.ContainerFolderCleanupTimerInterval.TotalMilliseconds);
this.cleanupTimer.Start((long)this.containerEnvironment.ContainerFolderCleanupTimerInterval.TotalMilliseconds);
}
public ContainerManager(AppInstanceManager appInstanceManager)
{
Utility.TraceSource.WriteInfo(TraceType, "Watching directory for creation of new container trace folders {0}", ContainerEnvironment.ContainerLogRootDirectory);
this.appInstanceManager = appInstanceManager;
if (Directory.Exists(ContainerEnvironment.ContainerLogRootDirectory))
{
foreach (var directory in Directory.EnumerateDirectories(ContainerEnvironment.ContainerLogRootDirectory))
{
var subDirectory = Path.GetFileName(directory);
var appInstanceId = Path.Combine(ContainerEnvironment.ContainersRootFolderName, subDirectory);
Utility.TraceSource.WriteInfo(TraceType, "Reading container traces from {0}", appInstanceId);
if (!File.Exists(Path.Combine(directory, ContainerEnvironment.ContainerDeletionMarkerFileName)))
{
this.appInstanceManager.CreateApplicationInstance(appInstanceId, null);
}
else
{
this.applicationInstancesToDelete.Add(appInstanceId);
}
}
}
else
{
Directory.CreateDirectory(ContainerEnvironment.ContainerLogRootDirectory);
}
// Arm FSW to watch for new folders.
this.watcher = new FileSystemWatcher(ContainerEnvironment.ContainerLogRootDirectory);
this.watcher.Created += this.OnFolderCreated;
this.watcher.EnableRaisingEvents = true;
// Arm the cleanup timer.
this.cleanupTimer = new DcaTimer(
ContainerManager.TraceType,
new TimerCallback(this.BackgroundCleanup),
(long)TimeSpan.FromMinutes(10.0).TotalMilliseconds);
this.cleanupTimer.Start();
}
public static int Main(string[] args)
{
Utility.TraceSource = null;
#if !DotNetCoreClr
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls12;
#endif
#if !DotNetCoreClrLinux && !DotNetCoreClrIOT
// Register an unhandled exception event handler
AppDomain.CurrentDomain.UnhandledException += UnhandledExceptionHandler.OnUnhandledException;
#endif
// Initialize config store
ConfigUpdateHandler configUpdateHandler = new ConfigUpdateHandler();
Utility.InitializeConfigStore(configUpdateHandler);
// Initialize the Fabric node Id
Utility.InitializeFabricNodeInfo();
// Read FabricHost's exit failure reset time from settings
UnhandledExceptionHandler.ReadFabricHostExitFailureResetTime();
// Set up tracing
Utility.InitializeTracing();
Utility.TraceSource = new FabricEvents.ExtensionsEvents(FabricEvents.Tasks.FabricDCA);
Utility.DcaProgramDirectory = Path.Combine(Path.GetDirectoryName(FabricEnvironment.GetCodePath()), "DCA.Code");
// Initialize the work directory
Utility.InitializeWorkDirectory();
// Create the event that indicates when the main thread should
// stop the DCA
stopDCAEvent = new ManualResetEvent(false);
UnhandledExceptionHandler.StopDcaEvent = stopDCAEvent;
// Create the event that indicates that the main thread has
// stopped the DCA.
dcaHasStoppedEvent = new ManualResetEvent(false);
// Register to be notified when we need to stop.
Console.CancelKeyPress += CtrlCHandler;
// The configuration update handler makes use of some members that we just
// initialized above, e.g. the trace source and the event used to indicate
// that the DCA should stop.
//
// Until we initialize these members, it is not safe for the the configuration
// update handler to process any updates because it would end up trying to
// access those uninitialized members. Therefore the configuration update
// handler ignores these updates until this point. This is okay, because we
// haven't attempted to read configurations until now. When we read the
// configurations later, we will be reading the updated values anyway, so
// ignoring the update notifications is not a problem.
//
// Now that we have initialized all the members needed by the configuration
// update handler, we tell it to start processing configuration updates.
configUpdateHandler.StartProcessingConfigUpdates();
// Create and initialize the application instance manager object.
AppInstanceManager appInstanceMgr = new AppInstanceManager();
// Notify the application instance manager about the availability of the
// Windows Fabric application.
appInstanceMgr.CreateApplicationInstance(Utility.WindowsFabricApplicationInstanceId, null);
// Let the config update handler know that the Windows Fabric
// Application has been created, so that it can send configuration
// updates if it needs to.
configUpdateHandler.StartConfigUpdateDeliveryToAppInstanceMgr(appInstanceMgr);
// Create and initialize the service package table manager object
ServicePackageTableManager servicePackageTableManager = new ServicePackageTableManager(appInstanceMgr);
// Create and initialize the container manager object if required.
ContainerManager containerManager = null;
ContainerEnvironment containerEnvironment = null;
// FabricContainerAppsEnabled is set to true by default
bool enableContainerManager = Utility.GetUnencryptedConfigValue <bool>(
ConfigReader.HostingSectionName,
ConfigReader.FabricContainerAppsEnabledParameterName,
true);
if (enableContainerManager)
{
containerEnvironment = new ContainerEnvironment();
containerManager = new ContainerManager(appInstanceMgr, containerEnvironment);
}
// DCA is running again.
HealthClient.ClearNodeHealthReport();
// Wait for the event that is signaled when the DCA needs to be
// stopped.
stopDCAEvent.WaitOne();
// Stop the DCA's periodic activities
Utility.TraceSource.WriteInfo(
TraceType,
"Stopping the DCA ...");
servicePackageTableManager.Dispose();
configUpdateHandler.Dispose();
appInstanceMgr.Dispose();
Utility.TraceSource.WriteInfo(
TraceType,
"DCA has stopped.");
// Set event to indicate that the main thread has stopped the DCA
bool result = dcaHasStoppedEvent.Set();
System.Fabric.Interop.Utility.ReleaseAssert(
result,
StringResources.DCAError_SignalEventToStopFailed);
return(0);
}
internal ServicePackageTableManager(AppInstanceManager appInstanceMgr)
{
this.applicationInstanceManager = appInstanceMgr;
this.servicePackageTable = new ServicePackageTable();
// Get the interval at which we need to read ETL files
int servicePackageNotificationIntervalSeconds = Utility.GetUnencryptedConfigValue(
HostingSectionName,
ServicePackageNotificationIntervalInSecondsParamName,
DefaultServicePackageNotificationIntervalInSeconds);
this.maxServicePackageInactiveTimeSeconds = servicePackageNotificationIntervalSeconds * MaxServicePackageInactiveTimeMultiplier;
Utility.TraceSource.WriteInfo(
TraceType,
"Interval at which we check for inactive service packages: {0} seconds.",
servicePackageNotificationIntervalSeconds);
Utility.TraceSource.WriteInfo(
TraceType,
"Maximum time for which a service package can remain inactive before being deleted: {0} seconds.",
this.maxServicePackageInactiveTimeSeconds);
// Create the folder where the backup files are stored
string tableBackupDirectory = Path.Combine(
Utility.LogDirectory,
AppInstanceDataDirName,
AppInstanceTableDirName);
FabricDirectory.CreateDirectory(tableBackupDirectory);
// Initialize the application activation table
AppActivationTable.Initialize(tableBackupDirectory);
// Retrieve the file where we last saved the service package table
this.tableBackup = new ServicePackageTableBackup(
tableBackupDirectory,
this.AddOrUpdateServicePackage);
// Initialize the service package table from the file that we last saved.
if (false == this.tableBackup.Read())
{
Utility.TraceSource.WriteError(
TraceType,
"Unable to initialize service package table from backup file on disk.");
}
// Initialize the timestamp up to which ETW events can be read
Utility.ApplicationEtwTracesEndTime = this.tableBackup.LatestBackupTime.Timestamp;
// Compute the directory containing ETL files containing information about
// application instances
string etlFileDirectory = Path.Combine(
Utility.LogDirectory,
AppInstanceDataDirName,
AppInstanceDataEtlDirName);
FabricDirectory.CreateDirectory(etlFileDirectory);
#if !DotNetCoreClrLinux
// Create the object that reads events from ETL files.
this.etlFileReader = new AppInstanceEtlFileDataReader(
etlFileDirectory,
this.tableBackup,
this.AddOrUpdateServicePackage,
this.RemoveServicePackage);
#endif
long inactiveServicePackageScanIntervalMillisec = ((long)servicePackageNotificationIntervalSeconds) * 1000;
this.inactiveServicePackageScanTimer = new DcaTimer(
InactiveServicePackageScanTimerId,
this.MarkInactiveServicePackagesForDeletion,
inactiveServicePackageScanIntervalMillisec);
this.inactiveServicePackageScanTimer.Start();
}
