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// 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.Version;
import com.yahoo.config.provision.ApplicationId;
import com.yahoo.config.provision.Capacity;
import com.yahoo.config.provision.CloudName;
import com.yahoo.config.provision.ClusterResources;
import com.yahoo.config.provision.ClusterSpec;
import com.yahoo.config.provision.Environment;
import com.yahoo.config.provision.NodeResources;
import com.yahoo.config.provision.NodeResources.DiskSpeed;
import com.yahoo.config.provision.Zone;
import com.yahoo.vespa.flags.PermanentFlags;
import com.yahoo.vespa.flags.StringFlag;
import com.yahoo.vespa.hosted.provision.NodeRepository;
import java.util.Map;
import java.util.TreeMap;
import static com.yahoo.config.provision.NodeResources.Architecture;
import static com.yahoo.vespa.flags.FetchVector.Dimension.INSTANCE_ID;
import static java.util.Objects.requireNonNull;
/**
* Defines the policies for assigning cluster capacity in various environments
*
* @author bratseth
* @see NodeResourceLimits
*/
public class CapacityPolicies {
private final NodeRepository nodeRepository;
private final Zone zone;
private final StringFlag adminClusterNodeArchitecture;
public CapacityPolicies(NodeRepository nodeRepository) {
this.nodeRepository = nodeRepository;
this.zone = nodeRepository.zone();
this.adminClusterNodeArchitecture = PermanentFlags.ADMIN_CLUSTER_NODE_ARCHITECTURE.bindTo(nodeRepository.flagSource());
}
public Capacity applyOn(Capacity capacity, ApplicationId application, boolean exclusive) {
var min = applyOn(capacity.minResources(), capacity, application, exclusive);
var max = applyOn(capacity.maxResources(), capacity, application, exclusive);
var groupSize = capacity.groupSize().fromAtMost(max.nodes() / min.groups())
.toAtLeast(min.nodes() / max.groups());
return capacity.withLimits(min, max, groupSize);
}
private ClusterResources applyOn(ClusterResources resources, Capacity capacity, ApplicationId application, boolean exclusive) {
int nodes = decideSize(resources.nodes(), capacity.isRequired(), application.instance().isTester());
int groups = Math.min(resources.groups(), nodes); // cannot have more groups than nodes
var nodeResources = decideNodeResources(resources.nodeResources(), capacity.isRequired(), exclusive);
return new ClusterResources(nodes, groups, nodeResources);
}
private int decideSize(int requested, boolean required, boolean isTester) {
if (isTester) return 1;
if (required) return requested;
return switch (zone.environment()) {
case dev, test -> 1;
case perf -> Math.min(requested, 3);
case staging -> requested <= 1 ? requested : Math.max(2, requested / 10);
case prod -> requested;
};
}
private NodeResources decideNodeResources(NodeResources target, boolean required, boolean exclusive) {
if (required || exclusive) return target; // Cannot downsize if resources are required, or exclusively allocated
if (target.isUnspecified()) return target; // Cannot be modified
if (zone.environment() == Environment.dev && zone.cloud().allowHostSharing()) {
// Dev does not cap the cpu or network of containers since usage is spotty: Allocate just a small amount exclusively
target = target.withVcpu(0.1).withBandwidthGbps(0.1);
// Allocate without GPU in dev
target = target.with(NodeResources.GpuResources.zero());
}
// Allow slow storage in zones which are not performance sensitive
if (zone.system().isCd() || zone.environment() == Environment.dev || zone.environment() == Environment.test)
target = target.with(NodeResources.DiskSpeed.any).with(NodeResources.StorageType.any).withBandwidthGbps(0.1);
return target;
}
public ClusterResources specifyFully(ClusterResources resources, ClusterSpec clusterSpec, ApplicationId applicationId) {
return resources.with(specifyFully(resources.nodeResources(), clusterSpec, applicationId));
}
public NodeResources specifyFully(NodeResources resources, ClusterSpec clusterSpec, ApplicationId applicationId) {
NodeResources amended = resources.withUnspecifiedFieldsFrom(defaultResources(clusterSpec, applicationId).with(DiskSpeed.any));
// TODO jonmv: remove this after all apps are 8.248.8 or above; architecture for admin nodes was not picked up before this.
if (clusterSpec.vespaVersion().isBefore(Version.fromString("8.248.8"))) amended = amended.with(resources.architecture());
return amended;
}
private NodeResources defaultResources(ClusterSpec clusterSpec, ApplicationId applicationId) {
if (clusterSpec.type() == ClusterSpec.Type.admin) {
Architecture architecture = adminClusterArchitecture(applicationId);
if (nodeRepository.exclusiveAllocation(clusterSpec)) {
return smallestExclusiveResources().with(architecture);
}
if (clusterSpec.id().value().equals("cluster-controllers")) {
return clusterControllerResources(clusterSpec, architecture).with(architecture);
}
if (clusterSpec.id().value().equals("logserver")) {
return logserverResources(architecture).with(architecture);
}
return versioned(clusterSpec, Map.of(new Version(0), smallestSharedResources())).with(architecture);
}
if (clusterSpec.type() == ClusterSpec.Type.content) {
// When changing defaults here update cloud.vespa.ai/en/reference/services
return zone.cloud().dynamicProvisioning()
? versioned(clusterSpec, Map.of(new Version(0), new NodeResources(2, 16, 300, 0.3)))
: versioned(clusterSpec, Map.of(new Version(0), new NodeResources(1.5, 8, 50, 0.3)));
}
else {
// When changing defaults here update cloud.vespa.ai/en/reference/services
return zone.cloud().dynamicProvisioning()
? versioned(clusterSpec, Map.of(new Version(0), new NodeResources(2.0, 8, 50, 0.3)))
: versioned(clusterSpec, Map.of(new Version(0), new NodeResources(1.5, 8, 50, 0.3)));
}
}
private NodeResources clusterControllerResources(ClusterSpec clusterSpec, Architecture architecture) {
// 1.32 fits floor(8/1.32) = 6 cluster controllers on each 8Gb host, and each will have
// 1.32-(0.7+0.6)*(1.32/8) = 1.1 Gb real memory given current taxes.
if (architecture == Architecture.x86_64)
return versioned(clusterSpec, Map.of(new Version(0), new NodeResources(0.25, 1.32, 10, 0.3)));
else
// arm64 nodes need more memory
return versioned(clusterSpec, Map.of(new Version(0), new NodeResources(0.25, 1.50, 10, 0.3)));
}
private NodeResources logserverResources(Architecture architecture) {
if (zone.cloud().name().equals(CloudName.GCP))
return new NodeResources(1, 4, 50, 0.3);
return architecture == Architecture.arm64
? new NodeResources(0.5, 2.5, 50, 0.3)
: new NodeResources(0.5, 2, 50, 0.3);
}
private Architecture adminClusterArchitecture(ApplicationId instance) {
return Architecture.valueOf(adminClusterNodeArchitecture.with(INSTANCE_ID, instance.serializedForm()).value());
}
/**
* Returns the resources for the newest version not newer than that requested in the cluster spec.
*/
static NodeResources versioned(ClusterSpec spec, Map<Version, NodeResources> resources) {
return requireNonNull(new TreeMap<>(resources).floorEntry(spec.vespaVersion()),
"no default resources applicable for " + spec + " among: " + resources)
.getValue();
}
// The lowest amount of resources that can be exclusive allocated (i.e. a matching host flavor for this exists)
private NodeResources smallestExclusiveResources() {
return (zone.cloud().name().equals(CloudName.GCP))
? new NodeResources(2, 8, 50, 0.3)
: new NodeResources(0.5, 8, 50, 0.3);
}
// The lowest amount of resources that can be shared (i.e. a matching host flavor for this exists)
private NodeResources smallestSharedResources() {
return (zone.cloud().name().equals(CloudName.GCP))
? new NodeResources(1, 4, 50, 0.3)
: new NodeResources(0.5, 2, 50, 0.3);
}
/** Returns whether the nodes requested can share physical host with other applications */
public ClusterSpec decideExclusivity(Capacity capacity, ClusterSpec requestedCluster) {
if (capacity.cloudAccount().isPresent()) return requestedCluster.withExclusivity(true); // Implicit exclusive
boolean exclusive = requestedCluster.isExclusive() && (capacity.isRequired() || zone.environment() == Environment.prod);
return requestedCluster.withExclusivity(exclusive);
}
}
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