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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 com.yahoo.config.provision.CloudName;
import com.yahoo.config.provision.SystemName;
import com.yahoo.config.provision.zone.ZoneApi;
import com.yahoo.config.provision.zone.ZoneId;
import com.yahoo.jdisc.Metric;
import com.yahoo.vespa.hosted.controller.Controller;
import com.yahoo.vespa.hosted.controller.api.integration.configserver.Node;
import com.yahoo.vespa.hosted.controller.api.integration.configserver.NodeRepository;
import com.yahoo.vespa.hosted.controller.api.integration.resource.MeteringClient;
import com.yahoo.vespa.hosted.controller.api.integration.resource.ResourceSnapshot;
import com.yahoo.vespa.hosted.controller.persistence.CuratorDb;
import com.yahoo.yolean.Exceptions;
import java.time.Clock;
import java.time.Duration;
import java.time.Instant;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeoutException;
import java.util.logging.Level;
import java.util.stream.Collectors;
/**
* Creates a {@link ResourceSnapshot} per application, which is then passed on to a MeteringClient
*
* @author olaa
*/
public class ResourceMeterMaintainer extends ControllerMaintainer {
private final Clock clock;
private final Metric metric;
private final NodeRepository nodeRepository;
private final MeteringClient meteringClient;
private final CuratorDb curator;
private static final String METERING_LAST_REPORTED = "metering_last_reported";
private static final String METERING_TOTAL_REPORTED = "metering_total_reported";
private static final int METERING_REFRESH_INTERVAL_SECONDS = 1800;
@SuppressWarnings("WeakerAccess")
public ResourceMeterMaintainer(Controller controller,
Duration interval,
Metric metric,
MeteringClient meteringClient) {
super(controller, interval, null, SystemName.all());
this.clock = controller.clock();
this.nodeRepository = controller.serviceRegistry().configServer().nodeRepository();
this.metric = metric;
this.meteringClient = meteringClient;
this.curator = controller.curator();
}
@Override
protected boolean maintain() {
try {
collectResourceSnapshots();
return true;
} catch (Exception e) {
log.log(Level.WARNING, "Failed to collect resource snapshots. Retrying in " + interval() + ". Error: " +
Exceptions.toMessageString(e));
}
return false;
}
private void collectResourceSnapshots() {
Collection<ResourceSnapshot> resourceSnapshots = getAllResourceSnapshots();
meteringClient.consume(resourceSnapshots);
metric.set(METERING_LAST_REPORTED, clock.millis() / 1000, metric.createContext(Collections.emptyMap()));
// total metered resource usage, for alerting on drastic changes
metric.set(METERING_TOTAL_REPORTED,
resourceSnapshots.stream()
.mapToDouble(r -> r.getCpuCores() + r.getMemoryGb() + r.getDiskGb()).sum(),
metric.createContext(Collections.emptyMap()));
try (var lock = curator.lockMeteringRefreshTime()) {
if (needsRefresh(curator.readMeteringRefreshTime())) {
meteringClient.refresh();
curator.writeMeteringRefreshTime(clock.millis());
}
} catch (TimeoutException ignored) {
// If it's locked, it means we're currently refreshing
}
}
private Collection<ResourceSnapshot> getAllResourceSnapshots() {
return controller().zoneRegistry().zones()
.ofCloud(CloudName.from("aws"))
.reachable().zones().stream()
.map(ZoneApi::getId)
.map(zoneId -> createResourceSnapshotsFromNodes(zoneId, nodeRepository.list(zoneId)))
.flatMap(Collection::stream)
.collect(Collectors.toList());
}
private Collection<ResourceSnapshot> createResourceSnapshotsFromNodes(ZoneId zoneId, List<Node> nodes) {
return nodes.stream()
.filter(this::unlessNodeOwnerIsHostedVespa)
.filter(this::isNodeStateMeterable)
.collect(Collectors.groupingBy(node ->
node.owner().get(),
Collectors.collectingAndThen(Collectors.toList(),
nodeList -> ResourceSnapshot.from(
nodeList,
clock.instant(),
zoneId))
)).values();
}
private boolean unlessNodeOwnerIsHostedVespa(Node node) {
return node.owner()
.map(owner -> !owner.tenant().value().equals("hosted-vespa"))
.orElse(false);
}
/**
* Checks if the node is in some state where it is in active use by the tenant,
* and not transitioning out of use, in a failed state, etc.
*/
private static final Set<Node.State> METERABLE_NODE_STATES = Set.of(
Node.State.reserved, // an application will soon use this node
Node.State.active, // an application is currently using this node
Node.State.inactive // an application is not using it, but it is reserved for being re-introduced or decommissioned
);
private boolean isNodeStateMeterable(Node node) {
return METERABLE_NODE_STATES.contains(node.state());
}
private boolean needsRefresh(long lastRefreshTimestamp) {
return clock.instant()
.minusSeconds(METERING_REFRESH_INTERVAL_SECONDS)
.isAfter(Instant.ofEpochMilli(lastRefreshTimestamp));
}
}
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