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// Copyright 2019 Oath Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.hosted.controller.maintenance;
import java.util.logging.Level;
import com.yahoo.vespa.hosted.controller.ApplicationController;
import com.yahoo.vespa.hosted.controller.Controller;
import com.yahoo.vespa.hosted.controller.Instance;
import com.yahoo.vespa.hosted.controller.api.integration.routing.GlobalRoutingService;
import com.yahoo.vespa.hosted.controller.application.ApplicationList;
import com.yahoo.vespa.hosted.controller.application.TenantAndApplicationId;
import com.yahoo.vespa.hosted.controller.rotation.RotationId;
import com.yahoo.vespa.hosted.controller.rotation.RotationState;
import com.yahoo.vespa.hosted.controller.rotation.RotationStatus;
import java.time.Duration;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.concurrent.ForkJoinPool;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicReference;
import java.util.stream.Collectors;
/**
* Periodically updates the status of assigned global rotations.
*
* @author mpolden
*/
public class RotationStatusUpdater extends Maintainer {
private static final int applicationsToUpdateInParallel = 10;
private final GlobalRoutingService service;
private final ApplicationController applications;
public RotationStatusUpdater(Controller controller, Duration interval, JobControl jobControl) {
super(controller, interval, jobControl);
this.service = controller.serviceRegistry().globalRoutingService();
this.applications = controller.applications();
}
@Override
protected void maintain() {
var failures = new AtomicInteger(0);
var attempts = new AtomicInteger(0);
var lastException = new AtomicReference<Exception>(null);
var instancesWithRotations = ApplicationList.from(applications.readable()).hasRotation().asList().stream()
.flatMap(application -> application.instances().values().stream())
.filter(instance -> ! instance.rotations().isEmpty());
// Run parallel stream inside a custom ForkJoinPool so that we can control the number of threads used
var pool = new ForkJoinPool(applicationsToUpdateInParallel);
pool.submit(() -> {
instancesWithRotations.parallel().forEach(instance -> {
attempts.incrementAndGet();
try {
RotationStatus status = getStatus(instance);
applications.lockApplicationIfPresent(TenantAndApplicationId.from(instance.id()), app ->
applications.store(app.with(instance.name(), locked -> locked.with(status))));
} catch (Exception e) {
failures.incrementAndGet();
lastException.set(e);
}
});
});
pool.shutdown();
try {
pool.awaitTermination(30, TimeUnit.SECONDS);
if (lastException.get() != null) {
log.log(Level.WARNING, String.format("Failed to get global routing status of %d/%d applications. Retrying in %s. Last error: ",
failures.get(),
attempts.get(),
maintenanceInterval()),
lastException.get());
}
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
}
private RotationStatus getStatus(Instance instance) {
var statusMap = new LinkedHashMap<RotationId, RotationStatus.Targets>();
for (var assignedRotation : instance.rotations()) {
var rotation = controller().routing().rotations().getRotation(assignedRotation.rotationId());
if (rotation.isEmpty()) continue;
var targets = service.getHealthStatus(rotation.get().name()).entrySet().stream()
.collect(Collectors.toMap(Map.Entry::getKey, (kv) -> from(kv.getValue())));
var lastUpdated = controller().clock().instant();
statusMap.put(assignedRotation.rotationId(), new RotationStatus.Targets(targets, lastUpdated));
}
return RotationStatus.from(statusMap);
}
private static RotationState from(com.yahoo.vespa.hosted.controller.api.integration.routing.RotationStatus status) {
switch (status) {
case IN: return RotationState.in;
case OUT: return RotationState.out;
case UNKNOWN: return RotationState.unknown;
default: throw new IllegalArgumentException("Unknown API value for rotation status: " + status);
}
}
}
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