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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.model.builder.xml.dom;
import com.yahoo.collections.Pair;
import com.yahoo.component.Version;
import com.yahoo.config.application.api.DeployLogger;
import com.yahoo.config.model.ConfigModelContext;
import com.yahoo.config.provision.Capacity;
import com.yahoo.config.provision.CloudAccount;
import com.yahoo.config.provision.ClusterInfo;
import com.yahoo.config.provision.ClusterMembership;
import com.yahoo.config.provision.ClusterResources;
import com.yahoo.config.provision.ClusterSpec;
import com.yahoo.config.provision.DockerImage;
import com.yahoo.config.provision.IntRange;
import com.yahoo.config.provision.NodeResources;
import com.yahoo.config.provision.ZoneEndpoint;
import com.yahoo.text.XML;
import com.yahoo.vespa.model.HostResource;
import com.yahoo.vespa.model.HostSystem;
import com.yahoo.vespa.model.container.xml.ContainerModelBuilder;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.function.ToDoubleFunction;
/**
* A common utility class to represent a requirement for nodes during model building.
* Such a requirement is commonly specified in services.xml as a nodes element.
*
* @author bratseth
*/
public class NodesSpecification {
private final ClusterResources min, max;
private final IntRange groupSize;
private final boolean dedicated;
/** The Vespa version we want the nodes to run */
private final Version version;
/**
* Whether the capacity amount specified is required or can be relaxed
* at the discretion of the component fulfilling it
*/
private final boolean required;
private final boolean canFail;
private final boolean exclusive;
/** The repo part of a docker image (without tag), optional */
private final Optional dockerImageRepo;
/** The ID of the cluster referencing this node specification, if any */
private final Optional combinedId;
/** The cloud account to use for nodes in this spec, if any */
private final Optional cloudAccount;
/* Whether the count attribute was present on the nodes element. */
private final boolean hasCountAttribute;
private NodesSpecification(ClusterResources min,
ClusterResources max,
IntRange groupSize,
boolean dedicated, Version version,
boolean required, boolean canFail, boolean exclusive,
Optional dockerImageRepo,
Optional combinedId,
Optional cloudAccount,
boolean hasCountAttribute) {
if (max.smallerThan(min))
throw new IllegalArgumentException("Max resources must be larger or equal to min resources, but " +
max + " is smaller than " + min);
if (min.nodes() < 1)
throw new IllegalArgumentException("Min node count cannot be less than 1, but is " + min.nodes());
// Non-scaled resources must be equal
if ( ! min.nodeResources().justNonNumbers().equals(max.nodeResources().justNonNumbers()))
throw new IllegalArgumentException("Min and max resources must have the same non-numeric settings, but " +
"min is " + min + " and max " + max);
if (min.nodeResources().bandwidthGbps() != max.nodeResources().bandwidthGbps())
throw new IllegalArgumentException("Min and max resources must have the same bandwidth, but " +
"min is " + min + " and max " + max);
this.min = min;
this.max = max;
this.groupSize = groupSize;
this.dedicated = dedicated;
this.version = version;
this.required = required;
this.canFail = canFail;
this.exclusive = exclusive;
this.dockerImageRepo = dockerImageRepo;
this.combinedId = combinedId;
this.cloudAccount = cloudAccount;
this.hasCountAttribute = hasCountAttribute;
}
static NodesSpecification create(boolean dedicated, boolean canFail, Version version,
ModelElement nodesElement, Optional dockerImageRepo,
Optional cloudAccount) {
var resolvedElement = resolveElement(nodesElement);
var combinedId = findCombinedId(nodesElement, resolvedElement);
var resourceConstraints = toResourceConstraints(resolvedElement);
boolean hasCountAttribute = resolvedElement.stringAttribute("count") != null;
return new NodesSpecification(resourceConstraints.min,
resourceConstraints.max,
resourceConstraints.groupSize,
dedicated,
version,
resolvedElement.booleanAttribute("required", false),
canFail,
resolvedElement.booleanAttribute("exclusive", false),
dockerImageToUse(resolvedElement, dockerImageRepo),
combinedId,
cloudAccount,
hasCountAttribute);
}
private static ResourceConstraints toResourceConstraints(ModelElement nodesElement) {
var nodes = rangeFrom(nodesElement, "count");
var groups = rangeFrom(nodesElement, "groups");
var groupSize = rangeFrom(nodesElement, "group-size");
if (nodes.from().orElse(1) < 1)
throw new IllegalArgumentException("Min node resources cannot be less than 1, but is " + nodes.from().getAsInt());
// Find the tightest possible limits for groups to avoid falsely concluding we are autoscaling
// when only specifying group size
int defaultMinGroups = nodes.from().orElse(1) / groupSize.to().orElse(nodes.from().orElse(1));
int defaultMaxGroups = groupSize.isEmpty() ? 1 : nodes.to().orElse(1) / groupSize.from().orElse(1);
var min = new ClusterResources(nodes.from().orElse(1), groups.from().orElse(defaultMinGroups), nodeResources(nodesElement).getFirst());
var max = new ClusterResources(nodes.to().orElse(1), groups.to().orElse(defaultMaxGroups), nodeResources(nodesElement).getSecond());
return new ResourceConstraints(min, max, groupSize);
}
private static IntRange rangeFrom(ModelElement element, String name) {
try {
return IntRange.from(element.stringAttribute(name, ""));
}
catch (IllegalArgumentException e) {
throw new IllegalArgumentException("Illegal " + name + " value", e);
}
}
private record ResourceConstraints(ClusterResources min, ClusterResources max, IntRange groupSize) {}
/** Returns the ID of the cluster referencing this node specification, if any */
private static Optional findCombinedId(ModelElement nodesElement, ModelElement resolvedElement) {
if (resolvedElement != nodesElement) {
// Specification for a container cluster referencing nodes in a content cluster
return containerIdOf(nodesElement);
}
// Specification for a content cluster that is referenced by a container cluster
return containerIdReferencing(nodesElement);
}
/** Returns a requirement for dedicated nodes taken from the given nodes element */
public static NodesSpecification from(ModelElement nodesElement, ConfigModelContext context) {
return create(true,
! context.getDeployState().getProperties().isBootstrap(),
context.getDeployState().getWantedNodeVespaVersion(),
nodesElement,
context.getDeployState().getWantedDockerImageRepo(),
context.getDeployState().getProperties().cloudAccount());
}
/**
* Returns a requirement for non-dedicated or dedicated nodes taken from the nodes element
* contained in the given parent element, or empty if the parent element is null, or the nodes elements
* is not present.
*/
public static Optional optionalDedicatedFromParent(ModelElement parentElement,
ConfigModelContext context) {
if (parentElement == null) return Optional.empty();
ModelElement nodesElement = parentElement.child("nodes");
if (nodesElement == null) return Optional.empty();
return Optional.of(create(nodesElement.booleanAttribute("dedicated", false),
! context.getDeployState().getProperties().isBootstrap(),
context.getDeployState().getWantedNodeVespaVersion(),
nodesElement,
context.getDeployState().getWantedDockerImageRepo(),
context.getDeployState().getProperties().cloudAccount()));
}
/**
* Returns a requirement from count non-dedicated nodes in one group
*/
public static NodesSpecification nonDedicated(int count, ConfigModelContext context) {
return new NodesSpecification(new ClusterResources(count, 1, NodeResources.unspecified()),
new ClusterResources(count, 1, NodeResources.unspecified()),
IntRange.empty(),
false,
context.getDeployState().getWantedNodeVespaVersion(),
false,
! context.getDeployState().getProperties().isBootstrap(),
false,
context.getDeployState().getWantedDockerImageRepo(),
Optional.empty(),
context.getDeployState().getProperties().cloudAccount(),
false);
}
/** Returns a requirement from count dedicated nodes in one group */
public static NodesSpecification dedicated(int count, ConfigModelContext context) {
return new NodesSpecification(new ClusterResources(count, 1, NodeResources.unspecified()),
new ClusterResources(count, 1, NodeResources.unspecified()),
IntRange.empty(),
true,
context.getDeployState().getWantedNodeVespaVersion(),
false,
! context.getDeployState().getProperties().isBootstrap(),
false,
context.getDeployState().getWantedDockerImageRepo(),
Optional.empty(),
context.getDeployState().getProperties().cloudAccount(),
false);
}
/**
* Returns a requirement for {@code count} shared nodes with {@code required} taken as
* the OR over all content clusters, and with the given resources.
*/
public static NodesSpecification requiredFromSharedParents(int count, NodeResources resources,
ModelElement element, ConfigModelContext context) {
List allContent = findParentByTag("services", element.getXml()).map(services -> XML.getChildren(services, "content"))
.orElse(List.of())
.stream()
.map(content -> new ModelElement(content).child("nodes"))
.filter(nodes -> nodes != null && nodes.stringAttribute("count") != null)
.map(nodes -> from(nodes, context))
.toList();
return new NodesSpecification(new ClusterResources(count, 1, resources),
new ClusterResources(count, 1, resources),
IntRange.empty(),
true,
context.getDeployState().getWantedNodeVespaVersion(),
allContent.stream().anyMatch(content -> content.required),
! context.getDeployState().getProperties().isBootstrap(),
false,
context.getDeployState().getWantedDockerImageRepo(),
Optional.empty(),
context.getDeployState().getProperties().cloudAccount(),
false);
}
public ClusterResources minResources() { return min; }
public ClusterResources maxResources() { return max; }
public IntRange groupSize() { return groupSize; }
/**
* Returns whether this requires dedicated nodes.
* Otherwise the model encountering this request should reuse nodes requested for other purposes whenever possible.
*/
public boolean isDedicated() { return dedicated; }
/**
* Returns whether the physical hosts running the nodes of this application can
* also run nodes of other applications. Using exclusive nodes for containers increases security
* and increases cost.
*/
public boolean isExclusive() { return exclusive; }
/** Returns whether the count attribute was present on the {@code } element. */
public boolean hasCountAttribute() {
return hasCountAttribute;
}
public Map provision(HostSystem hostSystem,
ClusterSpec.Type clusterType,
ClusterSpec.Id clusterId,
DeployLogger logger,
boolean stateful,
ClusterInfo clusterInfo) {
return provision(hostSystem, clusterType, clusterId, ZoneEndpoint.defaultEndpoint, logger, stateful, clusterInfo);
}
public Map provision(HostSystem hostSystem,
ClusterSpec.Type clusterType,
ClusterSpec.Id clusterId,
ZoneEndpoint zoneEndpoint,
DeployLogger logger,
boolean stateful,
ClusterInfo info) {
if (combinedId.isPresent())
clusterType = ClusterSpec.Type.combined;
ClusterSpec cluster = ClusterSpec.request(clusterType, clusterId)
.vespaVersion(version)
.exclusive(exclusive)
.combinedId(combinedId.map(ClusterSpec.Id::from))
.dockerImageRepository(dockerImageRepo)
.loadBalancerSettings(zoneEndpoint)
.stateful(stateful)
.build();
return hostSystem.allocateHosts(cluster, Capacity.from(min, max, groupSize, required, canFail, cloudAccount, info), logger);
}
private static Pair nodeResources(ModelElement nodesElement) {
ModelElement resources = nodesElement.child("resources");
if (resources != null) {
return nodeResourcesFromResourcesElement(resources);
}
else if (nodesElement.stringAttribute("flavor") != null) { // legacy fallback
var flavorResources = NodeResources.fromLegacyName(nodesElement.stringAttribute("flavor"));
return new Pair<>(flavorResources, flavorResources);
}
else {
return new Pair<>(NodeResources.unspecified(), NodeResources.unspecified());
}
}
private static Pair nodeResourcesFromResourcesElement(ModelElement element) {
Pair vcpu = toRange("vcpu", element, .0, Double::parseDouble);
Pair memory = toRange("memory", element, .0, s -> parseGbAmount(s, "B"));
Pair disk = toRange("disk", element, .0, s -> parseGbAmount(s, "B"));
Pair bandwith = toRange("bandwidth", element, .3, s -> parseGbAmount(s, "BPS"));
NodeResources.DiskSpeed diskSpeed = parseOptionalDiskSpeed(element.stringAttribute("disk-speed"));
NodeResources.StorageType storageType = parseOptionalStorageType(element.stringAttribute("storage-type"));
NodeResources.Architecture architecture = parseOptionalArchitecture(element.stringAttribute("architecture"));
NodeResources.GpuResources gpuResources = parseOptionalGpuResources(element.child("gpu"));
var min = new NodeResources(vcpu.getFirst(), memory.getFirst(), disk.getFirst(), bandwith.getFirst(),
diskSpeed, storageType, architecture, gpuResources);
var max = new NodeResources(vcpu.getSecond(), memory.getSecond(), disk.getSecond(), bandwith.getSecond(),
diskSpeed, storageType, architecture, gpuResources);
return new Pair<>(min, max);
}
private static NodeResources.GpuResources parseOptionalGpuResources(ModelElement element) {
if (element == null) return NodeResources.GpuResources.getDefault();
int count = element.requiredIntegerAttribute("count");
double memory = parseGbAmount(element.requiredStringAttribute("memory"), "B");
return new NodeResources.GpuResources(count, memory);
}
private static double parseGbAmount(String byteAmount, String unit) {
byteAmount = byteAmount.strip();
byteAmount = byteAmount.toUpperCase();
if (byteAmount.endsWith(unit))
byteAmount = byteAmount.substring(0, byteAmount.length() - unit.length());
double multiplier = -1;
if (byteAmount.endsWith("K"))
multiplier = Math.pow(1000, -2);
else if (byteAmount.endsWith("M"))
multiplier = Math.pow(1000, -1);
else if (byteAmount.endsWith("G"))
multiplier = 1;
else if (byteAmount.endsWith("T"))
multiplier = 1000;
else if (byteAmount.endsWith("P"))
multiplier = Math.pow(1000, 2);
else if (byteAmount.endsWith("E"))
multiplier = Math.pow(1000, 3);
else if (byteAmount.endsWith("Z"))
multiplier = Math.pow(1000, 4);
else if (byteAmount.endsWith("Y"))
multiplier = Math.pow(1000, 5);
if (multiplier == -1)
multiplier = Math.pow(1000, -3);
else
byteAmount = byteAmount.substring(0, byteAmount.length() -1).strip();
try {
return Double.parseDouble(byteAmount) * multiplier;
}
catch (NumberFormatException e) {
throw new IllegalArgumentException("Invalid byte amount '" + byteAmount +
"': Must be a floating point number " +
"optionally followed by k, M, G, T, P, E, Z or Y");
}
}
private static NodeResources.DiskSpeed parseOptionalDiskSpeed(String diskSpeedString) {
if (diskSpeedString == null) return NodeResources.DiskSpeed.getDefault();
return switch (diskSpeedString) {
case "fast" -> NodeResources.DiskSpeed.fast;
case "slow" -> NodeResources.DiskSpeed.slow;
case "any" -> NodeResources.DiskSpeed.any;
default -> throw new IllegalArgumentException("Illegal disk-speed value '" + diskSpeedString +
"': Legal values are 'fast', 'slow' and 'any')");
};
}
private static NodeResources.StorageType parseOptionalStorageType(String storageTypeString) {
if (storageTypeString == null) return NodeResources.StorageType.getDefault();
return switch (storageTypeString) {
case "remote" -> NodeResources.StorageType.remote;
case "local" -> NodeResources.StorageType.local;
case "any" -> NodeResources.StorageType.any;
default -> throw new IllegalArgumentException("Illegal storage-type value '" + storageTypeString +
"': Legal values are 'remote', 'local' and 'any')");
};
}
private static NodeResources.Architecture parseOptionalArchitecture(String architecture) {
if (architecture == null) return NodeResources.Architecture.getDefault();
return switch (architecture) {
case "x86_64" -> NodeResources.Architecture.x86_64;
case "arm64" -> NodeResources.Architecture.arm64;
case "any" -> NodeResources.Architecture.any;
default -> throw new IllegalArgumentException("Illegal architecture value '" + architecture +
"': Legal values are 'x86_64', 'arm64' and 'any')");
};
}
/**
* Resolve any reference in nodesElement and return the referred element.
*
* If nodesElement does not refer to a different element, this method behaves as the identity function.
*/
private static ModelElement resolveElement(ModelElement nodesElement) {
var element = nodesElement.getXml();
var referenceId = element.getAttribute("of");
if (referenceId.isEmpty()) return nodesElement;
var services = findParentByTag("services", element).orElseThrow(() -> clusterReferenceNotFoundException(referenceId));
var referencedService = findChildById(services, referenceId).orElseThrow(() -> clusterReferenceNotFoundException(referenceId));
if ( ! referencedService.getTagName().equals("content"))
throw new IllegalArgumentException("service '" + referenceId + "' is not a content service");
var referencedNodesElement = XML.getChild(referencedService, "nodes");
if (referencedNodesElement == null)
throw new IllegalArgumentException("expected reference to service '" + referenceId + "' to supply nodes, " +
"but that service has no element");
return new ModelElement(referencedNodesElement);
}
/** Returns the ID of the parent container element of nodesElement, if any */
private static Optional containerIdOf(ModelElement nodesElement) {
var element = nodesElement.getXml();
var container = findParentByTag("container", element);
return container.map(el -> el.getAttribute("id"));
}
/** Returns the ID of the container element referencing nodesElement, if any */
private static Optional containerIdReferencing(ModelElement nodesElement) {
var element = nodesElement.getXml();
var services = findParentByTag("services", element);
if (services.isEmpty()) return Optional.empty();
var content = findParentByTag("content", element);
if (content.isEmpty()) return Optional.empty();
var contentClusterId = content.get().getAttribute("id");
if (contentClusterId.isEmpty()) return Optional.empty();
for (var rootChild : XML.getChildren(services.get())) {
if ( ! ContainerModelBuilder.isContainerTag(rootChild)) continue;
var nodes = XML.getChild(rootChild, "nodes");
if (nodes == null) continue;
if (!contentClusterId.equals(nodes.getAttribute("of"))) continue;
return Optional.of(rootChild.getAttribute("id"));
}
return Optional.empty();
}
private static Optional findChildById(Element parent, String id) {
for (Element child : XML.getChildren(parent))
if (id.equals(child.getAttribute("id"))) return Optional.of(child);
return Optional.empty();
}
private static Optional findParentByTag(String tag, Element element) {
Node parent = element.getParentNode();
if (parent == null) return Optional.empty();
if ( ! (parent instanceof Element parentElement)) return Optional.empty();
if (parentElement.getTagName().equals(tag)) return Optional.of(parentElement);
return findParentByTag(tag, parentElement);
}
private static IllegalArgumentException clusterReferenceNotFoundException(String referenceId) {
return new IllegalArgumentException("referenced service '" + referenceId + "' is not defined");
}
private static Optional dockerImageToUse(ModelElement nodesElement, Optional dockerImage) {
String dockerImageFromElement = nodesElement.stringAttribute("docker-image");
return dockerImageFromElement == null ? dockerImage : Optional.of(DockerImage.fromString(dockerImageFromElement));
}
/** Parses a value ("value") or value range ("[min-value, max-value]") */
private static Pair toRange(String name, ModelElement element, double defaultValue, ToDoubleFunction valueParser) {
String s = element.stringAttribute(name);
try {
Pair pair;
if (s == null) return new Pair<>(defaultValue, defaultValue);
s = s.trim();
if (s.startsWith("[") && s.endsWith("]")) {
String[] numbers = s.substring(1, s.length() - 1).split(",");
if (numbers.length != 2) throw new IllegalArgumentException();
pair = new Pair<>(valueParser.applyAsDouble(numbers[0].trim()), valueParser.applyAsDouble(numbers[1].trim()));
if (pair.getFirst() > pair.getSecond())
throw new IllegalArgumentException("first value cannot be larger than second value");
} else {
pair = new Pair<>(valueParser.applyAsDouble(s), valueParser.applyAsDouble(s));
}
if (pair.getFirst() < 0 || pair.getSecond() < 0)
throw new IllegalArgumentException("values cannot be negative");
return pair;
}
catch (IllegalArgumentException e) {
throw new IllegalArgumentException("Expected a number or range on the form [min, max] for node resource '" + name + "', but got '" + s + "'", e);
}
}
@Override
public String toString() {
return "specification of " + (dedicated ? "dedicated " : "") +
(min.equals(max) ? min : "min " + min + " max " + max);
}
}
