com.yahoo.vespa.hosted.provision.persistence.ApplicationSerializer Maven / Gradle / Ivy
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Keeps track of node assignment in a multi-application setup.
// 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.persistence;
import com.yahoo.config.provision.CloudAccount;
import com.yahoo.config.provision.ClusterInfo;
import com.yahoo.config.provision.IntRange;
import com.yahoo.config.provision.ApplicationId;
import com.yahoo.config.provision.ClusterResources;
import com.yahoo.config.provision.ClusterSpec;
import com.yahoo.slime.ArrayTraverser;
import com.yahoo.slime.Cursor;
import com.yahoo.slime.Inspector;
import com.yahoo.slime.ObjectTraverser;
import com.yahoo.slime.Slime;
import com.yahoo.slime.SlimeUtils;
import com.yahoo.vespa.hosted.provision.applications.Application;
import com.yahoo.vespa.hosted.provision.applications.Cluster;
import com.yahoo.vespa.hosted.provision.applications.BcpGroupInfo;
import com.yahoo.vespa.hosted.provision.applications.ScalingEvent;
import com.yahoo.vespa.hosted.provision.applications.Status;
import com.yahoo.vespa.hosted.provision.autoscale.Autoscaling;
import com.yahoo.vespa.hosted.provision.autoscale.Load;
import java.io.IOException;
import java.io.UncheckedIOException;
import java.time.Duration;
import java.time.Instant;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Optional;
import java.util.OptionalInt;
/**
* Application JSON serializer
*
* @author bratseth
*/
public class ApplicationSerializer {
// WARNING: Since there are multiple servers in a ZooKeeper cluster and they upgrade one by one
// (and rewrite all nodes on startup), changes to the serialized format must be made
// such that what is serialized on version N+1 can be read by version N:
// - ADDING FIELDS: Always ok
// - REMOVING FIELDS: Stop reading the field first. Stop writing it on a later version.
// - CHANGING THE FORMAT OF A FIELD: Don't do it bro.
private static final String idKey = "id";
private static final String statusKey = "status";
private static final String currentReadShareKey = "currentReadShare";
private static final String maxReadShareKey = "maxReadShare";
private static final String clustersKey = "clusters";
private static final String exclusiveKey = "exclusive";
private static final String minResourcesKey = "min";
private static final String maxResourcesKey = "max";
private static final String groupSizeKey = "groupSize";
private static final String requiredKey = "required";
private static final String cloudAccountKey = "cloudAccount";
private static final String suggestionsKey = "suggestionsKey";
private static final String clusterInfoKey = "clusterInfo";
private static final String bcpDeadlineKey = "bcpDeadline";
private static final String hostTTLKey = "hostTTL";
private static final String bcpGroupInfoKey = "bcpGroupInfo";
private static final String queryRateKey = "queryRateKey";
private static final String growthRateHeadroomKey = "growthRateHeadroomKey";
private static final String cpuCostPerQueryKey = "cpuCostPerQueryKey";
private static final String resourcesKey = "resources";
private static final String targetKey = "target";
private static final String nodesKey = "nodes";
private static final String groupsKey = "groups";
private static final String nodeResourcesKey = "resources";
private static final String scalingEventsKey = "scalingEvents";
private static final String descriptionKey = "description";
private static final String peakKey = "peak";
private static final String idealKey = "ideal";
private static final String metricsKey = "metrics";
private static final String cpuKey = "cpu";
private static final String memoryKey = "memory";
private static final String diskKey = "disk";
private static final String gpuKey = "gpu";
private static final String gpuMemory = "gpuMemory";
private static final String fromKey = "from";
private static final String toKey = "to";
private static final String generationKey = "generation";
private static final String atKey = "at";
private static final String completionKey = "completion";
public static byte[] toJson(Application application) {
Slime slime = new Slime();
toSlime(application, slime.setObject());
try {
return SlimeUtils.toJsonBytes(slime);
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public static Application fromJson(byte[] data) {
return applicationFromSlime(SlimeUtils.jsonToSlime(data).get());
}
// ---------------------------------------------------------------------------------------
private static void toSlime(Application application, Cursor object) {
object.setString(idKey, application.id().serializedForm());
toSlime(application.status(), object.setObject(statusKey));
clustersToSlime(application.clusters().values(), object.setObject(clustersKey));
}
private static Application applicationFromSlime(Inspector applicationObject) {
ApplicationId id = ApplicationId.fromSerializedForm(applicationObject.field(idKey).asString());
return new Application(id,
statusFromSlime(applicationObject.field(statusKey)),
clustersFromSlime(applicationObject.field(clustersKey)));
}
private static void toSlime(Status status, Cursor statusObject) {
statusObject.setDouble(currentReadShareKey, status.currentReadShare());
statusObject.setDouble(maxReadShareKey, status.maxReadShare());
}
private static Status statusFromSlime(Inspector statusObject) {
return new Status(statusObject.field(currentReadShareKey).asDouble(),
statusObject.field(maxReadShareKey).asDouble());
}
private static void clustersToSlime(Collection clusters, Cursor clustersObject) {
clusters.forEach(cluster -> toSlime(cluster, clustersObject.setObject(cluster.id().value())));
}
private static Collection clustersFromSlime(Inspector clustersObject) {
List clusters = new ArrayList<>();
clustersObject.traverse((ObjectTraverser)(id, clusterObject) -> clusters.add(clusterFromSlime(id, clusterObject)));
return clusters;
}
private static void toSlime(Cluster cluster, Cursor clusterObject) {
clusterObject.setBool(exclusiveKey, cluster.exclusive());
toSlime(cluster.minResources(), clusterObject.setObject(minResourcesKey));
toSlime(cluster.maxResources(), clusterObject.setObject(maxResourcesKey));
toSlime(cluster.groupSize(), clusterObject.setObject(groupSizeKey));
clusterObject.setBool(requiredKey, cluster.required());
cluster.cloudAccount().ifPresent(cloudAccount -> clusterObject.setString(cloudAccountKey, cloudAccount.value()));
toSlime(cluster.suggestions(), clusterObject.setArray(suggestionsKey));
toSlime(cluster.target(), clusterObject.setObject(targetKey));
if (! cluster.clusterInfo().isEmpty())
toSlime(cluster.clusterInfo(), clusterObject.setObject(clusterInfoKey));
if (! cluster.bcpGroupInfo().isEmpty())
toSlime(cluster.bcpGroupInfo(), clusterObject.setObject(bcpGroupInfoKey));
scalingEventsToSlime(cluster.scalingEvents(), clusterObject.setArray(scalingEventsKey));
}
private static Cluster clusterFromSlime(String id, Inspector clusterObject) {
return new Cluster(ClusterSpec.Id.from(id),
clusterObject.field(exclusiveKey).asBool(),
clusterResourcesFromSlime(clusterObject.field(minResourcesKey)),
clusterResourcesFromSlime(clusterObject.field(maxResourcesKey)),
intRangeFromSlime(clusterObject.field(groupSizeKey)),
clusterObject.field(requiredKey).asBool(),
optionalCloudAccount(clusterObject.field(cloudAccountKey)),
suggestionsFromSlime(clusterObject.field(suggestionsKey)),
autoscalingFromSlime(clusterObject.field(targetKey)),
clusterInfoFromSlime(clusterObject.field(clusterInfoKey)),
bcpGroupInfoFromSlime(clusterObject.field(bcpGroupInfoKey)),
scalingEventsFromSlime(clusterObject.field(scalingEventsKey)));
}
private static void toSlime(List suggestions, Cursor suggestionsArray) {
suggestions.forEach(suggestion -> {
var suggestionObject = suggestionsArray.addObject();
toSlime(suggestion, suggestionObject);
});
}
private static void toSlime(Autoscaling autoscaling, Cursor autoscalingObject) {
autoscalingObject.setString(statusKey, toAutoscalingStatusCode(autoscaling.status()));
autoscalingObject.setString(descriptionKey, autoscaling.description());
autoscaling.resources().ifPresent(resources -> toSlime(resources, autoscalingObject.setObject(resourcesKey)));
autoscalingObject.setLong(atKey, autoscaling.at().toEpochMilli());
toSlime(autoscaling.peak(), autoscalingObject.setObject(peakKey));
toSlime(autoscaling.ideal(), autoscalingObject.setObject(idealKey));
toSlime(autoscaling.metrics(), autoscalingObject.setObject(metricsKey));
}
private static void toSlime(ClusterResources resources, Cursor clusterResourcesObject) {
clusterResourcesObject.setLong(nodesKey, resources.nodes());
clusterResourcesObject.setLong(groupsKey, resources.groups());
NodeResourcesSerializer.toSlime(resources.nodeResources(), clusterResourcesObject.setObject(nodeResourcesKey));
}
private static Optional optionalClusterResourcesFromSlime(Inspector clusterResourcesObject) {
if ( ! clusterResourcesObject.valid()) return Optional.empty();
return Optional.of(clusterResourcesFromSlime(clusterResourcesObject));
}
private static ClusterResources clusterResourcesFromSlime(Inspector clusterResourcesObject) {
return new ClusterResources((int)clusterResourcesObject.field(nodesKey).asLong(),
(int)clusterResourcesObject.field(groupsKey).asLong(),
NodeResourcesSerializer.resourcesFromSlime(clusterResourcesObject.field(nodeResourcesKey)));
}
private static void toSlime(IntRange range, Cursor rangeObject) {
range.from().ifPresent(from -> rangeObject.setLong(fromKey, from));
range.to().ifPresent(from -> rangeObject.setLong(toKey, from));
}
private static IntRange intRangeFromSlime(Inspector rangeObject) {
if ( ! rangeObject.valid()) return IntRange.empty();
return new IntRange(optionalInt(rangeObject.field(fromKey)), optionalInt(rangeObject.field(toKey)));
}
private static void toSlime(Load load, Cursor loadObject) {
loadObject.setDouble(cpuKey, load.cpu());
loadObject.setDouble(memoryKey, load.memory());
loadObject.setDouble(diskKey, load.disk());
loadObject.setDouble(gpuKey, load.gpu());
loadObject.setDouble(gpuMemory, load.gpuMemory());
}
private static Load loadFromSlime(Inspector loadObject) {
return new Load(loadObject.field(cpuKey).asDouble(),
loadObject.field(memoryKey).asDouble(),
loadObject.field(diskKey).asDouble(),
loadObject.field(gpuKey).asDouble(),
loadObject.field(gpuMemory).asDouble());
}
private static void toSlime(Autoscaling.Metrics metrics, Cursor metricsObject) {
metricsObject.setDouble(queryRateKey, metrics.queryRate());
metricsObject.setDouble(growthRateHeadroomKey, metrics.growthRateHeadroom());
metricsObject.setDouble(cpuCostPerQueryKey, metrics.cpuCostPerQuery());
}
private static Autoscaling.Metrics metricsFromSlime(Inspector metricsObject) {
return new Autoscaling.Metrics(metricsObject.field(queryRateKey).asDouble(),
metricsObject.field(growthRateHeadroomKey).asDouble(),
metricsObject.field(cpuCostPerQueryKey).asDouble());
}
private static List suggestionsFromSlime(Inspector suggestionsObject) {
var suggestions = new ArrayList();
if (!suggestionsObject.valid()) return suggestions;
suggestionsObject.traverse((ArrayTraverser) (id, suggestion) -> suggestions.add(autoscalingFromSlime(suggestion)));
return suggestions;
}
private static Autoscaling autoscalingFromSlime(Inspector autoscalingObject) {
if ( ! autoscalingObject.valid()) return Autoscaling.empty();
return new Autoscaling(fromAutoscalingStatusCode(autoscalingObject.field(statusKey).asString()),
autoscalingObject.field(descriptionKey).asString(),
optionalClusterResourcesFromSlime(autoscalingObject.field(resourcesKey)),
Instant.ofEpochMilli(autoscalingObject.field(atKey).asLong()),
loadFromSlime(autoscalingObject.field(peakKey)),
loadFromSlime(autoscalingObject.field(idealKey)),
metricsFromSlime(autoscalingObject.field(metricsKey)));
}
private static void toSlime(ClusterInfo clusterInfo, Cursor clusterInfoObject) {
clusterInfoObject.setLong(bcpDeadlineKey, clusterInfo.bcpDeadline().toMinutes());
if ( ! clusterInfo.hostTTL().isZero()) clusterInfoObject.setLong(hostTTLKey, clusterInfo.hostTTL().toMillis());
}
private static ClusterInfo clusterInfoFromSlime(Inspector clusterInfoObject) {
if ( ! clusterInfoObject.valid()) return ClusterInfo.empty();
ClusterInfo.Builder builder = new ClusterInfo.Builder();
builder.bcpDeadline(Duration.ofMinutes(clusterInfoObject.field(bcpDeadlineKey).asLong()));
builder.hostTTL(Duration.ofMillis(clusterInfoObject.field(hostTTLKey).asLong()));
return builder.build();
}
private static void toSlime(BcpGroupInfo bcpGroupInfo, Cursor bcpGroupInfoObject) {
bcpGroupInfoObject.setDouble(queryRateKey, bcpGroupInfo.queryRate());
bcpGroupInfoObject.setDouble(growthRateHeadroomKey, bcpGroupInfo.growthRateHeadroom());
bcpGroupInfoObject.setDouble(cpuCostPerQueryKey, bcpGroupInfo.cpuCostPerQuery());
}
private static BcpGroupInfo bcpGroupInfoFromSlime(Inspector bcpGroupInfoObject) {
if ( ! bcpGroupInfoObject.valid()) return BcpGroupInfo.empty();
return new BcpGroupInfo(bcpGroupInfoObject.field(queryRateKey).asDouble(),
bcpGroupInfoObject.field(growthRateHeadroomKey).asDouble(),
bcpGroupInfoObject.field(cpuCostPerQueryKey).asDouble());
}
private static void scalingEventsToSlime(List scalingEvents, Cursor eventArray) {
scalingEvents.forEach(event -> toSlime(event, eventArray.addObject()));
}
private static List scalingEventsFromSlime(Inspector eventArray) {
return SlimeUtils.entriesStream(eventArray).map(item -> scalingEventFromSlime(item)).toList();
}
private static void toSlime(ScalingEvent event, Cursor object) {
toSlime(event.from(), object.setObject(fromKey));
toSlime(event.to(), object.setObject(toKey));
object.setLong(generationKey, event.generation());
object.setLong(atKey, event.at().toEpochMilli());
event.completion().ifPresent(completion -> object.setLong(completionKey, completion.toEpochMilli()));
}
private static ScalingEvent scalingEventFromSlime(Inspector inspector) {
return new ScalingEvent(clusterResourcesFromSlime(inspector.field(fromKey)),
clusterResourcesFromSlime(inspector.field(toKey)),
inspector.field(generationKey).asLong(),
Instant.ofEpochMilli(inspector.field(atKey).asLong()),
optionalInstant(inspector.field(completionKey)));
}
private static String toAutoscalingStatusCode(Autoscaling.Status status) {
return switch (status) {
case unavailable -> "unavailable";
case waiting -> "waiting";
case ideal -> "ideal";
case insufficient -> "insufficient";
case rescaling -> "rescaling";
};
}
private static Autoscaling.Status fromAutoscalingStatusCode(String code) {
return switch (code) {
case "" -> Autoscaling.Status.unavailable;
case "unavailable" -> Autoscaling.Status.unavailable;
case "waiting" -> Autoscaling.Status.waiting;
case "ideal" -> Autoscaling.Status.ideal;
case "insufficient" -> Autoscaling.Status.insufficient;
case "rescaling" -> Autoscaling.Status.rescaling;
default -> throw new IllegalArgumentException("Unknown autoscaling status '" + code + "'");
};
}
private static Optional optionalCloudAccount(Inspector inspector) {
return inspector.valid() ? Optional.of(CloudAccount.from(inspector.asString())) : Optional.empty();
}
private static Optional optionalInstant(Inspector inspector) {
return inspector.valid() ? Optional.of(Instant.ofEpochMilli(inspector.asLong())) : Optional.empty();
}
private static OptionalInt optionalInt(Inspector inspector) {
return inspector.valid() ? OptionalInt.of((int)inspector.asLong()) : OptionalInt.empty();
}
}
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