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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.config.provision;
import com.yahoo.config.provision.host.FlavorOverrides;
import com.yahoo.config.provisioning.FlavorsConfig;
import java.util.Objects;
import java.util.Optional;
/**
* A host or node flavor.
* *Host* flavors come from a configured set which corresponds to the actual flavors available in a zone.
* *Node* flavors are simply a wrapper of a NodeResources object.
*
* @author bratseth
*/
public class Flavor {
private final boolean configured;
private final String name;
private final int cost;
private final Type type;
/** The hardware resources of this flavor */
private final NodeResources resources;
private final Optional<FlavorOverrides> flavorOverrides;
private static final double coreSpeedupRolloutFactor = 1.0/3.0; // TODO: Increase to 2/3 (then 1) on later releases
/** Creates a *host* flavor from configuration */
public Flavor(FlavorsConfig.Flavor flavorConfig) {
this(flavorConfig.name(),
new NodeResources(flavorConfig.minCpuCores() *
(1 + (flavorConfig.cpuCoreSpeedup() - 1) * coreSpeedupRolloutFactor),
flavorConfig.minMainMemoryAvailableGb(),
flavorConfig.minDiskAvailableGb(),
flavorConfig.bandwidth() / 1000,
flavorConfig.fastDisk() ? NodeResources.DiskSpeed.fast : NodeResources.DiskSpeed.slow),
Optional.empty(),
Type.valueOf(flavorConfig.environment()),
true,
flavorConfig.cost());
}
/** Creates a *node* flavor from a node resources spec */
public Flavor(NodeResources resources) {
this(resources.toString(), resources, Optional.empty(), Type.DOCKER_CONTAINER, false, 0);
}
private Flavor(String name, NodeResources resources, Optional<FlavorOverrides> flavorOverrides, Type type, boolean configured, int cost) {
this.name = Objects.requireNonNull(name, "Name cannot be null");
this.resources = Objects.requireNonNull(resources, "Resources cannot be null");
this.flavorOverrides = Objects.requireNonNull(flavorOverrides, "Flavor overrides cannot be null");
this.type = Objects.requireNonNull(type, "Type cannot be null");
this.configured = configured;
this.cost = cost;
}
public Flavor with(FlavorOverrides flavorOverrides) {
if (!configured)
throw new IllegalArgumentException("Cannot override non-configured flavor");
NodeResources newResources = new NodeResources(
resources.vcpu(),
resources.memoryGb(),
flavorOverrides.diskGb().orElseGet(resources::diskGb),
resources.bandwidthGbps(),
resources.diskSpeed());
return new Flavor(name, newResources, Optional.of(flavorOverrides), type, true, cost);
}
public Flavor with(NodeResources resources) {
if (type == Type.DOCKER_CONTAINER && !configured)
return new Flavor(resources);
if (!resources.equals(this.resources.withDiskGb(resources.diskGb())))
throw new IllegalArgumentException("Can only override disk GB for configured flavor");
return with(FlavorOverrides.ofDisk(resources.diskGb()));
}
/** Returns the unique identity of this flavor if it is configured, or the resource spec string otherwise */
public String name() { return name; }
/**
* Get the monthly cost (total cost of ownership) in USD for this flavor, typically total cost
* divided by 36 months.
*
* @return monthly cost in USD
*/
public int cost() { return cost; }
/**
* True if this is a configured flavor used for hosts,
* false if it is a virtual flavor created on the fly from node resources
*/
public boolean isConfigured() { return configured; }
public NodeResources resources() { return resources; }
public Optional<FlavorOverrides> flavorOverrides() {
return flavorOverrides;
}
public double getMinMainMemoryAvailableGb() { return resources.memoryGb(); }
public double getMinDiskAvailableGb() { return resources.diskGb(); }
public boolean hasFastDisk() { return resources.diskSpeed() == NodeResources.DiskSpeed.fast; }
public double getBandwidthGbps() { return resources.bandwidthGbps(); }
public double getMinCpuCores() { return resources.vcpu(); }
public Type getType() { return type; }
/** Convenience, returns getType() == Type.DOCKER_CONTAINER */
public boolean isDocker() { return type == Type.DOCKER_CONTAINER; }
@Override
public int hashCode() { return Objects.hash(name, flavorOverrides); }
@Override
public boolean equals(Object o) {
if (o == this) return true;
if ( ! (o instanceof Flavor)) return false;
Flavor other = (Flavor)o;
if (configured)
return Objects.equals(this.name, other.name) &&
Objects.equals(this.flavorOverrides, other.flavorOverrides);
else
return this.resources.equals(other.resources);
}
@Override
public String toString() {
if (isConfigured())
return "flavor '" + name + "'" + flavorOverrides.map(o -> " with overrides: " + o).orElse("");
else
return name;
}
public enum Type {
undefined, // Default value in config (flavors.def)
BARE_METAL,
VIRTUAL_MACHINE,
DOCKER_CONTAINER
}
}
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