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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.hosted.provision.maintenance;
import com.yahoo.config.provision.ApplicationId;
import com.yahoo.jdisc.Metric;
import com.yahoo.lang.MutableInteger;
import com.yahoo.vespa.hosted.provision.NodeRepository;
import com.yahoo.vespa.hosted.provision.autoscale.MetricsFetcher;
import com.yahoo.vespa.hosted.provision.autoscale.MetricsResponse;
import com.yahoo.yolean.Exceptions;
import java.time.Duration;
import java.util.Set;
import java.util.logging.Level;
/**
* Maintainer which keeps the node metric db up to date by periodically fetching metrics from all active nodes.
*
* @author bratseth
*/
public class NodeMetricsDbMaintainer extends NodeRepositoryMaintainer {
private static final int maxWarningsPerInvocation = 2;
private final MetricsFetcher metricsFetcher;
public NodeMetricsDbMaintainer(NodeRepository nodeRepository,
MetricsFetcher metricsFetcher,
Duration interval,
Metric metric) {
super(nodeRepository, interval, metric);
this.metricsFetcher = metricsFetcher;
}
@Override
protected double maintain() {
int attempts = 0;
var failures = new MutableInteger(0);
try {
Set<ApplicationId> applications = activeNodesByApplication().keySet();
if (applications.isEmpty()) return 1.0;
long pauseMs = interval().toMillis() / Math.max(4, applications.size()); // spread requests over interval
int done = 0;
for (ApplicationId application : applications) {
if (shuttingDown()) return asSuccessFactorDeviation(attempts, failures.get());
attempts++;
metricsFetcher.fetchMetrics(application)
.whenComplete((metricsResponse, exception) -> handleResponse(metricsResponse,
exception,
failures,
application));
if (++done < applications.size())
Thread.sleep(pauseMs);
}
nodeRepository().metricsDb().gc();
return asSuccessFactorDeviation(attempts, failures.get());
}
catch (InterruptedException e) {
return asSuccessFactorDeviation(attempts, failures.get());
}
}
@Override
public void shutdown() {
super.shutdown();
metricsFetcher.deconstruct();
}
private void handleResponse(MetricsResponse response,
Throwable exception,
MutableInteger failures,
ApplicationId application) {
if (exception != null) {
if (failures.get() < maxWarningsPerInvocation)
log.log(Level.WARNING, "Could not update metrics for " + application + ": " +
Exceptions.toMessageString(exception));
failures.add(1);
}
else if (response != null) {
nodeRepository().metricsDb().addNodeMetrics(response.nodeMetrics());
nodeRepository().metricsDb().addClusterMetrics(application, response.clusterMetrics());
}
}
}
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