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// Copyright 2017 Yahoo Holdings. 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.Deployer;
import com.yahoo.jdisc.Metric;
import com.yahoo.vespa.flags.BooleanFlag;
import com.yahoo.vespa.flags.FetchVector;
import com.yahoo.vespa.flags.FlagSource;
import com.yahoo.vespa.flags.PermanentFlags;
import com.yahoo.vespa.hosted.provision.Node;
import com.yahoo.vespa.hosted.provision.NodeRepository;
import java.time.Duration;
import java.time.Instant;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.function.Function;
import java.util.stream.Collectors;
/**
* The application maintainer regularly redeploys all applications to make sure the node repo and application
* model is in sync and to trigger background node allocation changes such as allocation optimizations and
* flavor retirement.
*
* @author bratseth
*/
public class PeriodicApplicationMaintainer extends ApplicationMaintainer {
private final Duration minTimeBetweenRedeployments;
private final FlagSource flagSource;
PeriodicApplicationMaintainer(Deployer deployer, Metric metric, NodeRepository nodeRepository,
Duration interval, Duration minTimeBetweenRedeployments, FlagSource flagSource) {
super(deployer, metric, nodeRepository, interval);
this.minTimeBetweenRedeployments = minTimeBetweenRedeployments;
this.flagSource = flagSource;
}
@Override
protected boolean canDeployNow(ApplicationId application) {
return deployer().lastDeployTime(application)
// Don't deploy if a regular deploy just happened
.map(lastDeployTime -> lastDeployTime.isBefore(nodeRepository().clock().instant().minus(minTimeBetweenRedeployments)))
// We only know last deploy time for applications that were deployed on this config server,
// the rest will be deployed on another config server
.orElse(false);
}
// Returns the applications that need to be redeployed by this config server at this point in time.
@Override
protected Set<ApplicationId> applicationsNeedingMaintenance() {
if (deployer().bootstrapping()) return Set.of();
// Collect all deployment times before sorting as deployments may happen while we build the set, breaking
// the comparable contract. Stale times are fine as the time is rechecked in ApplicationMaintainer#deployWithLock
Map<ApplicationId, Instant> deploymentTimes = nodesNeedingMaintenance().stream()
.map(node -> node.allocation().get().owner())
.distinct()
.filter(this::canDeployNow)
.collect(Collectors.toMap(Function.identity(), this::getLastDeployTime));
return deploymentTimes.entrySet().stream()
.sorted(Map.Entry.comparingByValue())
.map(Map.Entry::getKey)
.filter(id -> shouldMaintain(id))
.collect(Collectors.toCollection(LinkedHashSet::new));
}
private boolean shouldMaintain(ApplicationId id) {
BooleanFlag skipMaintenanceDeployment = PermanentFlags.SKIP_MAINTENANCE_DEPLOYMENT.bindTo(flagSource)
.with(FetchVector.Dimension.APPLICATION_ID, id.serializedForm());
return ! skipMaintenanceDeployment.value();
}
protected List<Node> nodesNeedingMaintenance() {
return nodeRepository().getNodes(Node.State.active);
}
}
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