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// Copyright Verizon Media. 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.config.provision.ClusterResources;
import com.yahoo.config.provision.ClusterSpec;
import com.yahoo.transaction.Mutex;
import com.yahoo.vespa.hosted.provision.Node;
import com.yahoo.vespa.hosted.provision.NodeRepository;
import com.yahoo.vespa.hosted.provision.applications.Application;
import com.yahoo.vespa.hosted.provision.applications.Applications;
import com.yahoo.vespa.hosted.provision.applications.Cluster;
import com.yahoo.vespa.hosted.provision.autoscale.Autoscaler;
import com.yahoo.vespa.hosted.provision.autoscale.NodeMetricsDb;
import com.yahoo.vespa.hosted.provision.provisioning.HostResourcesCalculator;
import java.time.Duration;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.stream.Collectors;
/**
* Maintainer computing scaling suggestions for all clusters
*
* @author bratseth
*/
public class ScalingSuggestionsMaintainer extends NodeRepositoryMaintainer {
private final Autoscaler autoscaler;
public ScalingSuggestionsMaintainer(NodeRepository nodeRepository,
HostResourcesCalculator hostResourcesCalculator,
NodeMetricsDb metricsDb,
Duration interval) {
super(nodeRepository, interval);
this.autoscaler = new Autoscaler(hostResourcesCalculator, metricsDb, nodeRepository);
}
@Override
protected void maintain() {
if ( ! nodeRepository().zone().environment().isProduction()) return;
activeNodesByApplication().forEach((applicationId, nodes) -> suggest(applicationId, nodes));
}
private void suggest(ApplicationId application, List<Node> applicationNodes) {
nodesByCluster(applicationNodes).forEach((clusterId, clusterNodes) ->
suggest(application, clusterId, clusterNodes));
}
private Applications applications() {
return nodeRepository().applications();
}
private void suggest(ApplicationId applicationId,
ClusterSpec.Id clusterId,
List<Node> clusterNodes) {
Application application = applications().get(applicationId).orElse(new Application(applicationId));
Optional<Cluster> cluster = application.cluster(clusterId);
if (cluster.isEmpty()) return;
Optional<ClusterResources> suggestion = autoscaler.suggest(cluster.get(), clusterNodes);
try (Mutex lock = nodeRepository().lock(applicationId)) {
applications().get(applicationId).ifPresent(a -> storeSuggestion(suggestion, clusterId, a, lock));
}
}
private void storeSuggestion(Optional<ClusterResources> suggestion,
ClusterSpec.Id clusterId,
Application application,
Mutex lock) {
Optional<Cluster> cluster = application.cluster(clusterId);
if (cluster.isEmpty()) return;
applications().put(application.with(cluster.get().withSuggested(suggestion)), lock);
}
private Map<ClusterSpec.Id, List<Node>> nodesByCluster(List<Node> applicationNodes) {
return applicationNodes.stream().collect(Collectors.groupingBy(n -> n.allocation().get().membership().cluster().id()));
}
}
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