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// Copyright Verizon Media. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.hosted.provision.applications;
import com.yahoo.config.provision.ClusterResources;
import com.yahoo.config.provision.ClusterSpec;
import com.yahoo.config.provision.NodeResources;
import com.yahoo.vespa.hosted.provision.lb.LoadBalancer;
import java.util.Objects;
import java.util.Optional;
/**
* The node repo's view of a cluster in an application deployment.
*
* This is immutable, and must be locked with the application lock on read-modify-write.
*
* @author bratseth
*/
public class Cluster {
private final ClusterSpec.Id id;
private final ClusterResources min, max;
private final Optional<ClusterResources> suggested;
private final Optional<ClusterResources> target;
public Cluster(ClusterSpec.Id id,
ClusterResources minResources,
ClusterResources maxResources,
Optional<ClusterResources> suggestedResources,
Optional<ClusterResources> targetResources) {
this.id = Objects.requireNonNull(id);
this.min = Objects.requireNonNull(minResources);
this.max = Objects.requireNonNull(maxResources);
this.suggested = Objects.requireNonNull(suggestedResources);
Objects.requireNonNull(targetResources);
if (targetResources.isPresent() && ! targetResources.get().isWithin(minResources, maxResources))
this.target = Optional.empty();
else
this.target = targetResources;
}
public ClusterSpec.Id id() { return id; }
/** Returns the configured minimal resources in this cluster */
public ClusterResources minResources() { return min; }
/** Returns the configured maximal resources in this cluster */
public ClusterResources maxResources() { return max; }
/**
* Returns the computed resources (between min and max, inclusive) this cluster should
* have allocated at the moment (whether or not it actually has it),
* or empty if the system currently has no target.
*/
public Optional<ClusterResources> targetResources() { return target; }
/**
* The suggested size of this cluster, which may or may not be within the min and max limits,
* or empty if there is currently no suggestion.
*/
public Optional<ClusterResources> suggestedResources() { return suggested; }
public Cluster withLimits(ClusterResources min, ClusterResources max) {
return new Cluster(id, min, max, suggested, target);
}
public Cluster withSuggested(Optional<ClusterResources> suggested) {
return new Cluster(id, min, max, suggested, target);
}
public Cluster withTarget(Optional<ClusterResources> target) {
return new Cluster(id, min, max, suggested, target);
}
public NodeResources capAtLimits(NodeResources resources) {
resources = resources.withVcpu(between(min.nodeResources().vcpu(), max.nodeResources().vcpu(), resources.vcpu()));
resources = resources.withMemoryGb(between(min.nodeResources().memoryGb(), max.nodeResources().memoryGb(), resources.memoryGb()));
resources = resources.withDiskGb(between(min.nodeResources().diskGb(), max.nodeResources().diskGb(), resources.diskGb()));
return resources;
}
private double between(double min, double max, double value) {
value = Math.max(min, value);
value = Math.min(max, value);
return value;
}
@Override
public int hashCode() { return id.hashCode(); }
@Override
public boolean equals(Object other) {
if (other == this) return true;
if ( ! (other instanceof Cluster)) return false;
return ((Cluster)other).id().equals(this.id);
}
@Override
public String toString() {
return "cluster '" + id + "'";
}
}
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