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// Copyright Yahoo. 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.config.provision.ApplicationId;
import com.yahoo.config.provision.Capacity;
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.SystemName;
import com.yahoo.config.provision.Zone;
import com.yahoo.vespa.flags.PermanentFlags;
import com.yahoo.vespa.hosted.provision.NodeRepository;
import java.util.function.Function;
/**
* Defines the policies for assigning cluster capacity in various environments
*
* @author bratseth
* @see NodeResourceLimits
*/
public class CapacityPolicies {
private final Zone zone;
private final Function<ClusterSpec.Type, Boolean> sharedHosts;
public CapacityPolicies(NodeRepository nodeRepository) {
this.zone = nodeRepository.zone();
this.sharedHosts = type -> PermanentFlags.SHARED_HOST.bindTo(nodeRepository.flagSource()).value().isEnabled(type.name());
}
public Capacity applyOn(Capacity capacity, ApplicationId application) {
return capacity.withLimits(applyOn(capacity.minResources(), capacity, application),
applyOn(capacity.maxResources(), capacity, application));
}
private ClusterResources applyOn(ClusterResources resources, Capacity capacity, ApplicationId application) {
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());
return new ClusterResources(nodes, groups, nodeResources);
}
private int decideSize(int requested, boolean required, boolean isTester) {
if (isTester) return 1;
if (required) return requested;
switch(zone.environment()) {
case dev : case test : return 1;
case perf : return Math.min(requested, 3);
case staging: return requested <= 1 ? requested : Math.max(2, requested / 10);
case prod : return requested;
default : throw new IllegalArgumentException("Unsupported environment " + zone.environment());
}
}
private NodeResources decideNodeResources(NodeResources target, boolean required) {
if (required) return target;
if (target.isUnspecified()) return target; // Cannot be modified
// Dev does not cap the cpu or network of containers since usage is spotty: Allocate just a small amount exclusively
if (zone.environment() == Environment.dev && !zone.getCloud().dynamicProvisioning())
target = target.withVcpu(0.1).withBandwidthGbps(0.1);
// 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 NodeResources defaultNodeResources(ClusterSpec.Type clusterType) {
if (clusterType == ClusterSpec.Type.admin) {
if (zone.system() == SystemName.dev) {
// Use small logserver in dev system
return new NodeResources(0.1, 1, 10, 0.3);
}
return zone.getCloud().dynamicProvisioning() && ! sharedHosts.apply(clusterType) ?
new NodeResources(0.5, 4, 50, 0.3) :
new NodeResources(0.5, 2, 50, 0.3);
}
return zone.getCloud().dynamicProvisioning() ?
new NodeResources(2.0, 8, 50, 0.3) :
new NodeResources(1.5, 8, 50, 0.3);
}
/**
* Returns whether the nodes requested can share physical host with other applications.
* A security feature which only makes sense for prod.
*/
public boolean decideExclusivity(Capacity capacity, boolean requestedExclusivity) {
return requestedExclusivity && (capacity.isRequired() || zone.environment() == Environment.prod);
}
}
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