com.yahoo.vespa.hosted.provision.provisioning.NodeRepositoryProvisioner Maven / Gradle / Ivy
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Keeps track of node assignment in a multi-application setup.
// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.hosted.provision.provisioning;
import com.yahoo.component.annotation.Inject;
import com.yahoo.config.provision.ActivationContext;
import com.yahoo.config.provision.ApplicationId;
import com.yahoo.config.provision.ApplicationTransaction;
import com.yahoo.config.provision.Capacity;
import com.yahoo.config.provision.CapacityPolicies;
import com.yahoo.config.provision.CloudAccount;
import com.yahoo.config.provision.ClusterResources;
import com.yahoo.config.provision.ClusterSpec;
import com.yahoo.config.provision.HostFilter;
import com.yahoo.config.provision.HostSpec;
import com.yahoo.config.provision.NodeResources;
import com.yahoo.config.provision.NodeType;
import com.yahoo.config.provision.ApplicationMutex;
import com.yahoo.config.provision.ProvisionLogger;
import com.yahoo.config.provision.Provisioner;
import com.yahoo.config.provision.Zone;
import com.yahoo.jdisc.Metric;
import com.yahoo.transaction.Mutex;
import com.yahoo.vespa.hosted.provision.Node;
import com.yahoo.vespa.hosted.provision.NodeList;
import com.yahoo.vespa.hosted.provision.NodeRepository;
import com.yahoo.vespa.hosted.provision.applications.Application;
import com.yahoo.vespa.hosted.provision.applications.Cluster;
import com.yahoo.vespa.hosted.provision.autoscale.AllocatableResources;
import com.yahoo.vespa.hosted.provision.autoscale.AllocationOptimizer;
import com.yahoo.vespa.hosted.provision.autoscale.ClusterModel;
import com.yahoo.vespa.hosted.provision.autoscale.Limits;
import com.yahoo.vespa.hosted.provision.autoscale.Load;
import com.yahoo.vespa.hosted.provision.node.Allocation;
import com.yahoo.vespa.hosted.provision.node.filter.ApplicationFilter;
import com.yahoo.vespa.hosted.provision.node.filter.NodeHostFilter;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Comparator;
import java.util.List;
import java.util.Optional;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* Implementation of the host provisioner API for hosted Vespa, using the node repository to allocate nodes.
* Does not allocate hosts for the routing application, see VespaModelFactory.createHostProvisioner
*
* @author bratseth
*/
public class NodeRepositoryProvisioner implements Provisioner {
private static final Logger log = Logger.getLogger(NodeRepositoryProvisioner.class.getName());
private final NodeRepository nodeRepository;
private final AllocationOptimizer allocationOptimizer;
private final Zone zone;
private final Preparer preparer;
private final Activator activator;
private final Optional loadBalancerProvisioner;
@Inject
public NodeRepositoryProvisioner(NodeRepository nodeRepository,
Zone zone,
ProvisionServiceProvider provisionServiceProvider,
Metric metric) {
this.nodeRepository = nodeRepository;
this.allocationOptimizer = new AllocationOptimizer(nodeRepository);
this.zone = zone;
this.loadBalancerProvisioner = provisionServiceProvider.getLoadBalancerService()
.map(lbService -> new LoadBalancerProvisioner(nodeRepository, lbService));
this.preparer = new Preparer(nodeRepository,
provisionServiceProvider.getHostProvisioner(),
loadBalancerProvisioner,
metric);
this.activator = new Activator(nodeRepository, loadBalancerProvisioner);
}
/**
* Returns a list of nodes in the prepared or active state, matching the given constraints.
* The nodes are ordered by increasing index number.
*/
@Override
public List prepare(ApplicationId application, ClusterSpec cluster, Capacity requested, ProvisionLogger logger) {
log.log(Level.FINE, "Received deploy prepare request for " + requested +
" for application " + application + ", cluster " + cluster);
validate(application, cluster, requested, logger);
var capacityPolicies = nodeRepository.capacityPoliciesFor(application);
NodeResources resources;
NodeSpec nodeSpec;
if (requested.type() == NodeType.tenant) {
cluster = capacityPolicies.decideExclusivity(requested, cluster);
Capacity actual = capacityPolicies.applyOn(requested, cluster.isExclusive());
ClusterResources target = decideTargetResources(application, cluster, actual, capacityPolicies);
validate(actual, target, cluster, application);
logIfDownscaled(requested.minResources().nodes(), actual.minResources().nodes(), cluster, logger);
resources = getNodeResources(cluster, target.nodeResources(), application, capacityPolicies);
nodeSpec = NodeSpec.from(target.nodes(), target.groups(), resources, cluster.isExclusive(), actual.canFail(),
requested.cloudAccount().orElse(nodeRepository.zone().cloud().account()),
requested.clusterInfo().hostTTL());
}
else {
cluster = cluster.withExclusivity(true);
resources = getNodeResources(cluster, requested.minResources().nodeResources(), application, capacityPolicies);
nodeSpec = NodeSpec.from(requested.type(), nodeRepository.zone().cloud().account());
}
return asSortedHosts(preparer.prepare(application, cluster, nodeSpec),
requireCompatibleResources(resources, cluster));
}
private void validate(ApplicationId application, ClusterSpec cluster, Capacity requested, ProvisionLogger logger) {
if (cluster.group().isPresent()) throw new IllegalArgumentException("Node requests cannot specify a group");
nodeRepository.nodeResourceLimits().ensureWithinAdvertisedLimits("Min", requested.minResources().nodeResources(), cluster);
nodeRepository.nodeResourceLimits().ensureWithinAdvertisedLimits("Max", requested.maxResources().nodeResources(), cluster);
if (!requested.minResources().nodeResources().gpuResources().equals(requested.maxResources().nodeResources().gpuResources()))
throw new IllegalArgumentException(requested + " is invalid: GPU capacity cannot have ranges");
logInsufficientDiskResources(cluster, requested, logger);
}
private void logInsufficientDiskResources(ClusterSpec cluster, Capacity requested, ProvisionLogger logger) {
var resources = requested.minResources().nodeResources();
if ( ! nodeRepository.nodeResourceLimits().isWithinAdvertisedDiskLimits(resources, cluster)) {
logger.logApplicationPackage(Level.WARNING, "Requested disk (" + resources.diskGb() +
"Gb) in " + cluster.id() + " is not large enough to fit " +
"core/heap dumps. Minimum recommended disk resources " +
"is 2x memory for containers and 3x memory for content");
}
}
private NodeResources getNodeResources(ClusterSpec cluster, NodeResources nodeResources, ApplicationId applicationId, CapacityPolicies capacityPolicies) {
return capacityPolicies.specifyFully(nodeResources, cluster);
}
@Override
public void activate(Collection hosts, ActivationContext context, ApplicationTransaction transaction) {
validate(hosts);
activator.activate(hosts, context.generation(), transaction);
}
@Override
public void restart(ApplicationId application, HostFilter filter) {
List updated = nodeRepository.nodes().restartActive(ApplicationFilter.from(application).and(NodeHostFilter.from(filter)));
if (updated.isEmpty()) {
throw new IllegalArgumentException("No matching nodes found");
}
}
@Override
public void remove(ApplicationTransaction transaction) {
nodeRepository.remove(transaction);
loadBalancerProvisioner.ifPresent(lbProvisioner -> lbProvisioner.deactivate(transaction));
}
@Override
public ApplicationMutex lock(ApplicationId application) {
return new ApplicationMutex(application, nodeRepository.applications().lock(application));
}
/**
* Returns the target cluster resources, a value between the min and max in the requested capacity,
* and updates the application store with the received min and max.
*/
private ClusterResources decideTargetResources(ApplicationId applicationId, ClusterSpec clusterSpec, Capacity requested,
CapacityPolicies capacityPolicies) {
try (Mutex lock = nodeRepository.applications().lock(applicationId)) {
var application = nodeRepository.applications().get(applicationId).orElse(Application.empty(applicationId))
.withCluster(clusterSpec.id(), clusterSpec.isExclusive(), requested);
nodeRepository.applications().put(application, lock);
var cluster = application.cluster(clusterSpec.id()).get();
return cluster.target().resources().orElseGet(() -> currentResources(application, clusterSpec, cluster, requested, capacityPolicies));
}
}
/** Returns the current resources of this cluster, or requested min if none */
private ClusterResources currentResources(Application application,
ClusterSpec clusterSpec,
Cluster cluster,
Capacity requested,
CapacityPolicies capacityPolicies) {
NodeList nodes = nodeRepository.nodes().list(Node.State.active).owner(application.id())
.cluster(clusterSpec.id())
.not().retired()
.not().removable();
boolean firstDeployment = nodes.isEmpty();
var current =
firstDeployment // start at min, preserve current resources otherwise
? new AllocatableResources(initialResourcesFrom(requested, clusterSpec, application.id(), capacityPolicies), clusterSpec,
nodeRepository, requested.cloudAccount().orElse(CloudAccount.empty))
: new AllocatableResources(nodes, nodeRepository);
var model = new ClusterModel(nodeRepository, application, clusterSpec, cluster, nodes, current, nodeRepository.metricsDb(), nodeRepository.clock());
return within(Limits.of(requested), model, firstDeployment);
}
private ClusterResources initialResourcesFrom(Capacity requested, ClusterSpec clusterSpec, ApplicationId applicationId, CapacityPolicies capacityPolicies) {
return capacityPolicies.specifyFully(requested.minResources(), clusterSpec);
}
/** Make the minimal adjustments needed to the current resources to stay within the limits */
private ClusterResources within(Limits limits, ClusterModel model, boolean firstDeployment) {
if (limits.min().equals(limits.max())) return limits.min();
// Don't change current deployments that are still legal
if (! firstDeployment && model.current().advertisedResources().isWithin(limits.min(), limits.max()))
return model.current().advertisedResources();
// Otherwise, find an allocation that preserves the current resources as well as possible
return allocationOptimizer.findBestAllocation(Load.one(), model, limits, false)
.orElseThrow(() -> newNoAllocationPossible(model.current().clusterSpec(), limits))
.advertisedResources();
}
private void validate(Capacity actual, ClusterResources target, ClusterSpec cluster, ApplicationId application) {
if ( ! actual.canFail()) return;
if (! application.instance().isTester() && zone.environment().isProduction() &&
requiresRedundancy(cluster.type()) && target.nodes() == 1)
throw new IllegalArgumentException("In " + cluster +
": Deployments to prod require at least 2 nodes per cluster for redundancy.");
if ( ! actual.groupSize().includes(target.nodes() / target.groups()))
throw new IllegalArgumentException("In " + cluster + ": Group size with " + target +
" is not within allowed group size " + actual.groupSize());
}
private static boolean requiresRedundancy(ClusterSpec.Type clusterType) {
return clusterType.isContent() || clusterType.isContainer();
}
private void logIfDownscaled(int requestedMinNodes, int actualMinNodes, ClusterSpec cluster, ProvisionLogger logger) {
if (zone.environment().isManuallyDeployed() && actualMinNodes < requestedMinNodes)
logger.log(Level.INFO, "Requested " + requestedMinNodes + " nodes for " + cluster +
", downscaling to " + actualMinNodes + " nodes in " + zone.environment());
}
private List asSortedHosts(List nodes, NodeResources requestedResources) {
nodes = new ArrayList<>(nodes);
nodes.sort(Comparator.comparingInt(node -> node.allocation().get().membership().index()));
List hosts = new ArrayList<>(nodes.size());
for (Node node : nodes) {
log.log(Level.FINE, () -> "Prepared node " + node.hostname() + " - " + node.flavor());
Allocation nodeAllocation = node.allocation().orElseThrow(IllegalStateException::new);
hosts.add(new HostSpec(node.hostname(),
nodeRepository.resourcesCalculator().realResourcesOf(node, nodeRepository),
node.flavor().resources(),
requestedResources,
nodeAllocation.membership(),
node.status().vespaVersion(),
nodeAllocation.networkPorts(),
node.status().containerImage()));
if (nodeAllocation.networkPorts().isPresent()) {
log.log(Level.FINE, () -> "Prepared node " + node.hostname() + " has port allocations");
}
}
return hosts;
}
private void validate(Collection hosts) {
for (HostSpec host : hosts) {
if (host.membership().isEmpty())
throw new IllegalArgumentException("Hosts must be assigned a cluster when activating, but got " + host);
if (host.membership().get().cluster().group().isEmpty())
throw new IllegalArgumentException("Hosts must be assigned a group when activating, but got " + host);
}
}
private static NodeResources requireCompatibleResources(NodeResources nodeResources, ClusterSpec cluster) {
if (cluster.type() != ClusterSpec.Type.container && !nodeResources.gpuResources().isZero()) {
throw new IllegalArgumentException(cluster.id() + " of type " + cluster.type() + " does not support GPU resources");
}
return nodeResources;
}
private IllegalArgumentException newNoAllocationPossible(ClusterSpec spec, Limits limits) {
StringBuilder message = new StringBuilder("No allocation possible within ").append(limits);
if (nodeRepository.exclusivity().allocation(spec) && findNearestNodeResources(limits).isPresent())
message.append(". Nearest allowed node resources: ").append(findNearestNodeResources(limits).get());
return new IllegalArgumentException(message.toString());
}
private Optional findNearestNodeResources(Limits limits) {
Optional nearestMin = nearestFlavorResources(limits.min().nodeResources());
Optional nearestMax = nearestFlavorResources(limits.max().nodeResources());
if (nearestMin.isEmpty()) return nearestMax;
if (nearestMax.isEmpty()) return nearestMin;
if (limits.min().nodeResources().distanceTo(nearestMin.get()) < limits.max().nodeResources().distanceTo(nearestMax.get()))
return nearestMin;
else
return nearestMax;
}
/** Returns the advertised flavor resources which are nearest to the given resources */
private Optional nearestFlavorResources(NodeResources requestedResources) {
return nodeRepository.flavors().getFlavors().stream()
.map(flavor -> nodeRepository.resourcesCalculator().advertisedResourcesOf(flavor))
.filter(resources -> resources.satisfies(requestedResources))
.min(Comparator.comparingDouble(resources -> resources.distanceTo(requestedResources)))
.map(resources -> resources.withBandwidthGbps(requestedResources.bandwidthGbps()))
.map(resources -> resources.storageType() == NodeResources.StorageType.remote ?
resources.withDiskGb(requestedResources.diskGb()) : resources);
}
}
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