1 files changed, 515 insertions, 0 deletions
diff --git a/lib/perfdata/graphitewriter.cpp b/lib/perfdata/graphitewriter.cpp
new file mode 100644
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--- /dev/null
+++ b/lib/perfdata/graphitewriter.cpp
@@ -0,0 +1,515 @@
+/* Icinga 2 | (c) 2012 Icinga GmbH | GPLv2+ */
+
+#include "perfdata/graphitewriter.hpp"
+#include "perfdata/graphitewriter-ti.cpp"
+#include "icinga/service.hpp"
+#include "icinga/checkcommand.hpp"
+#include "icinga/macroprocessor.hpp"
+#include "icinga/icingaapplication.hpp"
+#include "base/tcpsocket.hpp"
+#include "base/configtype.hpp"
+#include "base/objectlock.hpp"
+#include "base/logger.hpp"
+#include "base/convert.hpp"
+#include "base/utility.hpp"
+#include "base/perfdatavalue.hpp"
+#include "base/application.hpp"
+#include "base/stream.hpp"
+#include "base/networkstream.hpp"
+#include "base/exception.hpp"
+#include "base/statsfunction.hpp"
+#include <boost/algorithm/string.hpp>
+#include <boost/algorithm/string/replace.hpp>
+#include <utility>
+
+using namespace icinga;
+
+REGISTER_TYPE(GraphiteWriter);
+
+REGISTER_STATSFUNCTION(GraphiteWriter, &GraphiteWriter::StatsFunc);
+
+/*
+ * Enable HA capabilities once the config object is loaded.
+ */
+void GraphiteWriter::OnConfigLoaded()
+{
+	ObjectImpl<GraphiteWriter>::OnConfigLoaded();
+
+	m_WorkQueue.SetName("GraphiteWriter, " + GetName());
+
+	if (!GetEnableHa()) {
+		Log(LogDebug, "GraphiteWriter")
+			<< "HA functionality disabled. Won't pause connection: " << GetName();
+
+		SetHAMode(HARunEverywhere);
+	} else {
+		SetHAMode(HARunOnce);
+	}
+}
+
+/**
+ * Feature stats interface
+ *
+ * @param status Key value pairs for feature stats
+ * @param perfdata Array of PerfdataValue objects
+ */
+void GraphiteWriter::StatsFunc(const Dictionary::Ptr& status, const Array::Ptr& perfdata)
+{
+	DictionaryData nodes;
+
+	for (const GraphiteWriter::Ptr& graphitewriter : ConfigType::GetObjectsByType<GraphiteWriter>()) {
+		size_t workQueueItems = graphitewriter->m_WorkQueue.GetLength();
+		double workQueueItemRate = graphitewriter->m_WorkQueue.GetTaskCount(60) / 60.0;
+
+		nodes.emplace_back(graphitewriter->GetName(), new Dictionary({
+			{ "work_queue_items", workQueueItems },
+			{ "work_queue_item_rate", workQueueItemRate },
+			{ "connected", graphitewriter->GetConnected() }
+		}));
+
+		perfdata->Add(new PerfdataValue("graphitewriter_" + graphitewriter->GetName() + "_work_queue_items", workQueueItems));
+		perfdata->Add(new PerfdataValue("graphitewriter_" + graphitewriter->GetName() + "_work_queue_item_rate", workQueueItemRate));
+	}
+
+	status->Set("graphitewriter", new Dictionary(std::move(nodes)));
+}
+
+/**
+ * Resume is equivalent to Start, but with HA capabilities to resume at runtime.
+ */
+void GraphiteWriter::Resume()
+{
+	ObjectImpl<GraphiteWriter>::Resume();
+
+	Log(LogInformation, "GraphiteWriter")
+		<< "'" << GetName() << "' resumed.";
+
+	/* Register exception handler for WQ tasks. */
+	m_WorkQueue.SetExceptionCallback([this](boost::exception_ptr exp) { ExceptionHandler(std::move(exp)); });
+
+	/* Timer for reconnecting */
+	m_ReconnectTimer = new Timer();
+	m_ReconnectTimer->SetInterval(10);
+	m_ReconnectTimer->OnTimerExpired.connect([this](const Timer * const&) { ReconnectTimerHandler(); });
+	m_ReconnectTimer->Start();
+	m_ReconnectTimer->Reschedule(0);
+
+	/* Register event handlers. */
+	m_HandleCheckResults = Checkable::OnNewCheckResult.connect([this](const Checkable::Ptr& checkable,
+		const CheckResult::Ptr& cr, const MessageOrigin::Ptr&) {
+		CheckResultHandler(checkable, cr);
+	});
+}
+
+/**
+ * Pause is equivalent to Stop, but with HA capabilities to resume at runtime.
+ */
+void GraphiteWriter::Pause()
+{
+	m_HandleCheckResults.disconnect();
+	m_ReconnectTimer.reset();
+
+	try {
+		ReconnectInternal();
+	} catch (const std::exception&) {
+		Log(LogInformation, "GraphiteWriter")
+			<< "'" << GetName() << "' paused. Unable to connect, not flushing buffers. Data may be lost on reload.";
+
+		ObjectImpl<GraphiteWriter>::Pause();
+		return;
+	}
+
+	m_WorkQueue.Join();
+	DisconnectInternal();
+
+	Log(LogInformation, "GraphiteWriter")
+		<< "'" << GetName() << "' paused.";
+
+	ObjectImpl<GraphiteWriter>::Pause();
+}
+
+/**
+ * Check if method is called inside the WQ thread.
+ */
+void GraphiteWriter::AssertOnWorkQueue()
+{
+	ASSERT(m_WorkQueue.IsWorkerThread());
+}
+
+/**
+ * Exception handler for the WQ.
+ *
+ * Closes the connection if connected.
+ *
+ * @param exp Exception pointer
+ */
+void GraphiteWriter::ExceptionHandler(boost::exception_ptr exp)
+{
+	Log(LogCritical, "GraphiteWriter", "Exception during Graphite operation: Verify that your backend is operational!");
+
+	Log(LogDebug, "GraphiteWriter")
+		<< "Exception during Graphite operation: " << DiagnosticInformation(std::move(exp));
+
+	if (GetConnected()) {
+		m_Stream->close();
+
+		SetConnected(false);
+	}
+}
+
+/**
+ * Reconnect method, stops when the feature is paused in HA zones.
+ *
+ * Called inside the WQ.
+ */
+void GraphiteWriter::Reconnect()
+{
+	AssertOnWorkQueue();
+
+	if (IsPaused()) {
+		SetConnected(false);
+		return;
+	}
+
+	ReconnectInternal();
+}
+
+/**
+ * Reconnect method, connects to a TCP Stream
+ */
+void GraphiteWriter::ReconnectInternal()
+{
+	double startTime = Utility::GetTime();
+
+	CONTEXT("Reconnecting to Graphite '" + GetName() + "'");
+
+	SetShouldConnect(true);
+
+	if (GetConnected())
+		return;
+
+	Log(LogNotice, "GraphiteWriter")
+		<< "Reconnecting to Graphite on host '" << GetHost() << "' port '" << GetPort() << "'.";
+
+	m_Stream = Shared<AsioTcpStream>::Make(IoEngine::Get().GetIoContext());
+
+	try {
+		icinga::Connect(m_Stream->lowest_layer(), GetHost(), GetPort());
+	} catch (const std::exception& ex) {
+		Log(LogWarning, "GraphiteWriter")
+			<< "Can't connect to Graphite on host '" << GetHost() << "' port '" << GetPort() << ".'";
+
+		SetConnected(false);
+
+		throw;
+	}
+
+	SetConnected(true);
+
+	Log(LogInformation, "GraphiteWriter")
+		<< "Finished reconnecting to Graphite in " << std::setw(2) << Utility::GetTime() - startTime << " second(s).";
+}
+
+/**
+ * Reconnect handler called by the timer.
+ *
+ * Enqueues a reconnect task into the WQ.
+ */
+void GraphiteWriter::ReconnectTimerHandler()
+{
+	if (IsPaused())
+		return;
+
+	m_WorkQueue.Enqueue([this]() { Reconnect(); }, PriorityHigh);
+}
+
+/**
+ * Disconnect the stream.
+ *
+ * Called inside the WQ.
+ */
+void GraphiteWriter::Disconnect()
+{
+	AssertOnWorkQueue();
+
+	DisconnectInternal();
+}
+
+/**
+ * Disconnect the stream.
+ *
+ * Called outside the WQ.
+ */
+void GraphiteWriter::DisconnectInternal()
+{
+	if (!GetConnected())
+		return;
+
+	m_Stream->close();
+
+	SetConnected(false);
+}
+
+/**
+ * Check result event handler, checks whether feature is not paused in HA setups.
+ *
+ * @param checkable Host/Service object
+ * @param cr Check result including performance data
+ */
+void GraphiteWriter::CheckResultHandler(const Checkable::Ptr& checkable, const CheckResult::Ptr& cr)
+{
+	if (IsPaused())
+		return;
+
+	m_WorkQueue.Enqueue([this, checkable, cr]() { CheckResultHandlerInternal(checkable, cr); });
+}
+
+/**
+ * Check result event handler, prepares metadata and perfdata values and calls Send*()
+ *
+ * Called inside the WQ.
+ *
+ * @param checkable Host/Service object
+ * @param cr Check result including performance data
+ */
+void GraphiteWriter::CheckResultHandlerInternal(const Checkable::Ptr& checkable, const CheckResult::Ptr& cr)
+{
+	AssertOnWorkQueue();
+
+	CONTEXT("Processing check result for '" + checkable->GetName() + "'");
+
+	/* TODO: Deal with missing connection here. Needs refactoring
+	 * into parsing the actual performance data and then putting it
+	 * into a queue for re-inserting. */
+
+	if (!IcingaApplication::GetInstance()->GetEnablePerfdata() || !checkable->GetEnablePerfdata())
+		return;
+
+	Host::Ptr host;
+	Service::Ptr service;
+	tie(host, service) = GetHostService(checkable);
+
+	MacroProcessor::ResolverList resolvers;
+	if (service)
+		resolvers.emplace_back("service", service);
+	resolvers.emplace_back("host", host);
+	resolvers.emplace_back("icinga", IcingaApplication::GetInstance());
+
+	String prefix;
+
+	if (service) {
+		prefix = MacroProcessor::ResolveMacros(GetServiceNameTemplate(), resolvers, cr, nullptr, [](const Value& value) -> Value {
+			return EscapeMacroMetric(value);
+		});
+	} else {
+		prefix = MacroProcessor::ResolveMacros(GetHostNameTemplate(), resolvers, cr, nullptr, [](const Value& value) -> Value {
+			return EscapeMacroMetric(value);
+		});
+	}
+
+	String prefixPerfdata = prefix + ".perfdata";
+	String prefixMetadata = prefix + ".metadata";
+
+	double ts = cr->GetExecutionEnd();
+
+	if (GetEnableSendMetadata()) {
+		if (service) {
+			SendMetric(checkable, prefixMetadata, "state", service->GetState(), ts);
+		} else {
+			SendMetric(checkable, prefixMetadata, "state", host->GetState(), ts);
+		}
+
+		SendMetric(checkable, prefixMetadata, "current_attempt", checkable->GetCheckAttempt(), ts);
+		SendMetric(checkable, prefixMetadata, "max_check_attempts", checkable->GetMaxCheckAttempts(), ts);
+		SendMetric(checkable, prefixMetadata, "state_type", checkable->GetStateType(), ts);
+		SendMetric(checkable, prefixMetadata, "reachable", checkable->IsReachable(), ts);
+		SendMetric(checkable, prefixMetadata, "downtime_depth", checkable->GetDowntimeDepth(), ts);
+		SendMetric(checkable, prefixMetadata, "acknowledgement", checkable->GetAcknowledgement(), ts);
+		SendMetric(checkable, prefixMetadata, "latency", cr->CalculateLatency(), ts);
+		SendMetric(checkable, prefixMetadata, "execution_time", cr->CalculateExecutionTime(), ts);
+	}
+
+	SendPerfdata(checkable, prefixPerfdata, cr, ts);
+}
+
+/**
+ * Parse performance data from check result and call SendMetric()
+ *
+ * @param checkable Host/service object
+ * @param prefix Metric prefix string
+ * @param cr Check result including performance data
+ * @param ts Timestamp when the check result was created
+ */
+void GraphiteWriter::SendPerfdata(const Checkable::Ptr& checkable, const String& prefix, const CheckResult::Ptr& cr, double ts)
+{
+	Array::Ptr perfdata = cr->GetPerformanceData();
+
+	if (!perfdata)
+		return;
+
+	CheckCommand::Ptr checkCommand = checkable->GetCheckCommand();
+
+	ObjectLock olock(perfdata);
+	for (const Value& val : perfdata) {
+		PerfdataValue::Ptr pdv;
+
+		if (val.IsObjectType<PerfdataValue>())
+			pdv = val;
+		else {
+			try {
+				pdv = PerfdataValue::Parse(val);
+			} catch (const std::exception&) {
+				Log(LogWarning, "GraphiteWriter")
+					<< "Ignoring invalid perfdata for checkable '"
+					<< checkable->GetName() << "' and command '"
+					<< checkCommand->GetName() << "' with value: " << val;
+				continue;
+			}
+		}
+
+		String escapedKey = EscapeMetricLabel(pdv->GetLabel());
+
+		SendMetric(checkable, prefix, escapedKey + ".value", pdv->GetValue(), ts);
+
+		if (GetEnableSendThresholds()) {
+			if (!pdv->GetCrit().IsEmpty())
+				SendMetric(checkable, prefix, escapedKey + ".crit", pdv->GetCrit(), ts);
+			if (!pdv->GetWarn().IsEmpty())
+				SendMetric(checkable, prefix, escapedKey + ".warn", pdv->GetWarn(), ts);
+			if (!pdv->GetMin().IsEmpty())
+				SendMetric(checkable, prefix, escapedKey + ".min", pdv->GetMin(), ts);
+			if (!pdv->GetMax().IsEmpty())
+				SendMetric(checkable, prefix, escapedKey + ".max", pdv->GetMax(), ts);
+		}
+	}
+}
+
+/**
+ * Computes metric data and sends to Graphite
+ *
+ * @param checkable Host/service object
+ * @param prefix Computed metric prefix string
+ * @param name Metric name
+ * @param value Metric value
+ * @param ts Timestamp when the check result was created
+ */
+void GraphiteWriter::SendMetric(const Checkable::Ptr& checkable, const String& prefix, const String& name, double value, double ts)
+{
+	namespace asio = boost::asio;
+
+	std::ostringstream msgbuf;
+	msgbuf << prefix << "." << name << " " << Convert::ToString(value) << " " << static_cast<long>(ts);
+
+	Log(LogDebug, "GraphiteWriter")
+		<< "Checkable '" << checkable->GetName() << "' adds to metric list: '" << msgbuf.str() << "'.";
+
+	// do not send \n to debug log
+	msgbuf << "\n";
+
+	std::unique_lock<std::mutex> lock(m_StreamMutex);
+
+	if (!GetConnected())
+		return;
+
+	try {
+		asio::write(*m_Stream, asio::buffer(msgbuf.str()));
+		m_Stream->flush();
+	} catch (const std::exception& ex) {
+		Log(LogCritical, "GraphiteWriter")
+			<< "Cannot write to TCP socket on host '" << GetHost() << "' port '" << GetPort() << "'.";
+
+		throw ex;
+	}
+}
+
+/**
+ * Escape metric tree elements
+ *
+ * Dots are not allowed, e.g. in host names
+ *
+ * @param str Metric part name
+ * @return Escape string
+ */
+String GraphiteWriter::EscapeMetric(const String& str)
+{
+	String result = str;
+
+	//don't allow '.' in metric prefixes
+	boost::replace_all(result, " ", "_");
+	boost::replace_all(result, ".", "_");
+	boost::replace_all(result, "\\", "_");
+	boost::replace_all(result, "/", "_");
+
+	return result;
+}
+
+/**
+ * Escape metric label
+ *
+ * Dots are allowed - users can create trees from perfdata labels
+ *
+ * @param str Metric label name
+ * @return Escaped string
+ */
+String GraphiteWriter::EscapeMetricLabel(const String& str)
+{
+	String result = str;
+
+	//allow to pass '.' in perfdata labels
+	boost::replace_all(result, " ", "_");
+	boost::replace_all(result, "\\", "_");
+	boost::replace_all(result, "/", "_");
+	boost::replace_all(result, "::", ".");
+
+	return result;
+}
+
+/**
+ * Escape macro metrics found via host/service name templates
+ *
+ * @param value Array or string with macro metric names
+ * @return Escaped string. Arrays are joined with dots.
+ */
+Value GraphiteWriter::EscapeMacroMetric(const Value& value)
+{
+	if (value.IsObjectType<Array>()) {
+		Array::Ptr arr = value;
+		ArrayData result;
+
+		ObjectLock olock(arr);
+		for (const Value& arg : arr) {
+			result.push_back(EscapeMetric(arg));
+		}
+
+		return Utility::Join(new Array(std::move(result)), '.');
+	} else
+		return EscapeMetric(value);
+}
+
+/**
+ * Validate the configuration setting 'host_name_template'
+ *
+ * @param lvalue String containing runtime macros.
+ * @param utils Helper, unused
+ */
+void GraphiteWriter::ValidateHostNameTemplate(const Lazy<String>& lvalue, const ValidationUtils& utils)
+{
+	ObjectImpl<GraphiteWriter>::ValidateHostNameTemplate(lvalue, utils);
+
+	if (!MacroProcessor::ValidateMacroString(lvalue()))
+		BOOST_THROW_EXCEPTION(ValidationError(this, { "host_name_template" }, "Closing $ not found in macro format string '" + lvalue() + "'."));
+}
+
+/**
+ * Validate the configuration setting 'service_name_template'
+ *
+ * @param lvalue String containing runtime macros.
+ * @param utils Helper, unused
+ */
+void GraphiteWriter::ValidateServiceNameTemplate(const Lazy<String>& lvalue, const ValidationUtils& utils)
+{
+	ObjectImpl<GraphiteWriter>::ValidateServiceNameTemplate(lvalue, utils);
+
+	if (!MacroProcessor::ValidateMacroString(lvalue()))
+		BOOST_THROW_EXCEPTION(ValidationError(this, { "service_name_template" }, "Closing $ not found in macro format string '" + lvalue() + "'."));
+}