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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "metrics_producer.h"
#include <vespa/vespalib/data/slime/slime.h>
#include <vespa/fnet/task.h>
#include <vespa/fnet/transport.h>
namespace slobrok {
using namespace std::chrono;
namespace {
time_t
secondsSinceEpoch() {
return duration_cast<seconds>(system_clock::now().time_since_epoch()).count();
}
class MetricsSnapshotter : public FNET_Task
{
MetricsProducer &_owner;
void PerformTask() override {
_owner.snapshot();
Schedule(60.0);
}
public:
MetricsSnapshotter(FNET_Transport &transport, MetricsProducer &owner)
: FNET_Task(transport.GetScheduler()),
_owner(owner)
{
Schedule(60.0);
}
~MetricsSnapshotter() { Kill(); }
};
class MetricSnapshot
{
private:
vespalib::Slime _data;
vespalib::slime::Cursor& _metrics;
vespalib::slime::Cursor& _snapshot;
vespalib::slime::Cursor& _values;
double _snapLen;
public:
MetricSnapshot(uint32_t prevTime, uint32_t currTime);
void addCount(const char *name, const char *desc, uint32_t count);
vespalib::string asString() const {
return _data.toString();
}
};
MetricSnapshot::MetricSnapshot(uint32_t prevTime, uint32_t currTime)
: _data(),
_metrics(_data.setObject()),
_snapshot(_metrics.setObject("snapshot")),
_values(_metrics.setArray("values")),
_snapLen(currTime - prevTime)
{
_snapshot.setLong("from", prevTime);
_snapshot.setLong("to", currTime);
if (_snapLen < 1.0) {
_snapLen = 1.0;
}
}
void
MetricSnapshot::addCount(const char *name, const char *desc, uint32_t count)
{
using namespace vespalib::slime::convenience;
Cursor& value = _values.addObject();
value.setString("name", name);
value.setString("description", desc);
Cursor& inner = value.setObject("values");
inner.setLong("count", count);
inner.setDouble("rate", count / _snapLen);
}
vespalib::string
makeSnapshot(const RPCHooks::Metrics &prev, const RPCHooks::Metrics &curr,
uint32_t prevTime, uint32_t currTime)
{
MetricSnapshot snapshot(prevTime, currTime);
snapshot.addCount("slobrok.heartbeats.failed",
"count of failed heartbeat requests",
curr.heartBeatFails - prev.heartBeatFails);
snapshot.addCount("slobrok.requests.register",
"count of register requests received",
curr.registerReqs - prev.registerReqs);
snapshot.addCount("slobrok.requests.mirror",
"count of mirroring requests received",
curr.mirrorReqs - prev.mirrorReqs);
snapshot.addCount("slobrok.requests.admin",
"count of administrative requests received",
curr.adminReqs - prev.adminReqs);
snapshot.addCount("slobrok.missing.consensus",
"number of seconds without full consensus with all other brokers",
curr.missingConsensusTime);
return snapshot.asString();
}
} // namespace <unnamed>
MetricsProducer::MetricsProducer(const RPCHooks &hooks,
FNET_Transport &transport)
: _rpcHooks(hooks),
_lastMetrics(RPCHooks::Metrics::zero()),
_producer(),
_startTime(secondsSinceEpoch()),
_lastSnapshotStart(_startTime),
_snapshotter(new MetricsSnapshotter(transport, *this))
{
}
MetricsProducer::~MetricsProducer() = default;
vespalib::string
MetricsProducer::getMetrics(const vespalib::string &consumer)
{
return _producer.getMetrics(consumer);
}
vespalib::string
MetricsProducer::getTotalMetrics(const vespalib::string &)
{
uint32_t now = secondsSinceEpoch();
RPCHooks::Metrics current = _rpcHooks.getMetrics();
RPCHooks::Metrics start = RPCHooks::Metrics::zero();
return makeSnapshot(start, current, _startTime, now);
}
void
MetricsProducer::snapshot()
{
uint32_t now = secondsSinceEpoch();
RPCHooks::Metrics current = _rpcHooks.getMetrics();
_producer.setMetrics(makeSnapshot(_lastMetrics, current, _lastSnapshotStart, now));
_lastMetrics = current;
_lastSnapshotStart = now;
}
} // namespace slobrok
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