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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.google.common.util.concurrent.UncheckedTimeoutException;
import com.yahoo.config.provision.ClusterResources;
import com.yahoo.config.provision.InstanceName;
import com.yahoo.config.provision.NodeResources;
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.ApplicationController;
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.ResourceAllocation;
import com.yahoo.vespa.hosted.controller.api.integration.resource.ResourceSnapshot;
import com.yahoo.vespa.hosted.controller.application.SystemApplication;
import com.yahoo.vespa.hosted.controller.application.TenantAndApplicationId;
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.EnumSet;
import java.util.List;
import java.util.Map;
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 {
/**
* 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 = EnumSet.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 final ApplicationController applications;
private final NodeRepository nodeRepository;
private final MeteringClient meteringClient;
private final CuratorDb curator;
private final SystemName systemName;
private final Metric metric;
private final Clock clock;
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);
this.applications = controller.applications();
this.nodeRepository = controller.serviceRegistry().configServer().nodeRepository();
this.meteringClient = meteringClient;
this.curator = controller.curator();
this.systemName = controller.serviceRegistry().zoneRegistry().system();
this.metric = metric;
this.clock = controller.clock();
}
@Override
protected double maintain() {
Collection<ResourceSnapshot> resourceSnapshots;
try {
resourceSnapshots = getAllResourceSnapshots();
} catch (Exception e) {
log.log(Level.WARNING, "Failed to collect resource snapshots. Retrying in " + interval() + ". Error: " +
Exceptions.toMessageString(e));
return 0.0;
}
if (systemName.isPublic()) reportResourceSnapshots(resourceSnapshots);
updateDeploymentCost(resourceSnapshots);
return 1.0;
}
void updateDeploymentCost(Collection<ResourceSnapshot> resourceSnapshots) {
resourceSnapshots.stream()
.collect(Collectors.groupingBy(snapshot -> TenantAndApplicationId.from(snapshot.getApplicationId()),
Collectors.groupingBy(snapshot -> snapshot.getApplicationId().instance())))
.forEach(this::updateDeploymentCost);
}
private void updateDeploymentCost(TenantAndApplicationId tenantAndApplication, Map<InstanceName, List<ResourceSnapshot>> snapshotsByInstance) {
try {
applications.lockApplicationIfPresent(tenantAndApplication, locked -> {
for (InstanceName instanceName : locked.get().instances().keySet()) {
Map<ZoneId, Double> deploymentCosts = snapshotsByInstance.getOrDefault(instanceName, List.of()).stream()
.collect(Collectors.toUnmodifiableMap(
ResourceSnapshot::getZoneId,
snapshot -> cost(snapshot.allocation(), systemName)));
locked = locked.with(instanceName, i -> i.withDeploymentCosts(deploymentCosts));
}
applications.store(locked);
});
} catch (UncheckedTimeoutException ignored) {
// Will be retried on next maintenance, avoid throwing so we can update the other apps instead
}
}
private void reportResourceSnapshots(Collection<ResourceSnapshot> resourceSnapshots) {
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 List<ResourceSnapshot> getAllResourceSnapshots() {
return controller().zoneRegistry().zones()
.reachable().zones().stream()
.map(ZoneApi::getId)
.map(zoneId -> createResourceSnapshotsFromNodes(zoneId, nodeRepository.list(zoneId, false)))
.flatMap(Collection::stream)
.collect(Collectors.toList());
}
private Collection<ResourceSnapshot> createResourceSnapshotsFromNodes(ZoneId zoneId, List<Node> nodes) {
return nodes.stream()
.filter(this::unlessNodeOwnerIsSystemApplication)
.filter(this::isNodeStateMeterable)
.filter(this::isClusterTypeMeterable)
.collect(Collectors.groupingBy(node ->
node.owner().get(),
Collectors.collectingAndThen(Collectors.toList(),
nodeList -> ResourceSnapshot.from(
nodeList,
clock.instant(),
zoneId))
)).values();
}
private boolean unlessNodeOwnerIsSystemApplication(Node node) {
return node.owner()
.map(owner -> !owner.tenant().equals(SystemApplication.TENANT))
.orElse(false);
}
private boolean isNodeStateMeterable(Node node) {
return METERABLE_NODE_STATES.contains(node.state());
}
private boolean isClusterTypeMeterable(Node node) {
return node.clusterType() != Node.ClusterType.admin; // log servers and shared cluster controllers
}
private boolean needsRefresh(long lastRefreshTimestamp) {
return clock.instant()
.minusSeconds(METERING_REFRESH_INTERVAL_SECONDS)
.isAfter(Instant.ofEpochMilli(lastRefreshTimestamp));
}
public static double cost(ClusterResources clusterResources, SystemName systemName) {
NodeResources nr = clusterResources.nodeResources();
return cost(new ResourceAllocation(nr.vcpu(), nr.memoryGb(), nr.diskGb()).multiply(clusterResources.nodes()), systemName);
}
private static double cost(ResourceAllocation allocation, SystemName systemName) {
// Divide cost by 3 in non-public zones to show approx. AWS equivalent cost
double costDivisor = systemName.isPublic() ? 1.0 : 3.0;
double cost = new NodeResources(allocation.getCpuCores(), allocation.getMemoryGb(), allocation.getDiskGb(), 0).cost();
return Math.round(cost * 100.0 / costDivisor) / 100.0;
}
}
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