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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.hosted.provision.autoscale;
import ai.vespa.metrics.ContainerMetrics;
import ai.vespa.metrics.HostedNodeAdminMetrics;
import ai.vespa.metrics.SearchNodeMetrics;
import ai.vespa.metrics.StorageMetrics;
import com.yahoo.collections.ListMap;
import com.yahoo.collections.Pair;
import com.yahoo.config.provision.ClusterSpec;
import com.yahoo.slime.ArrayTraverser;
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.Node;
import com.yahoo.vespa.hosted.provision.NodeList;
import java.time.Instant;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import static ai.vespa.metrics.ContainerMetrics.APPLICATION_GENERATION;
import static ai.vespa.metrics.ContainerMetrics.IN_SERVICE;
/**
* A response containing metrics for a collection of nodes.
*
* @author bratseth
*/
public class MetricsResponse {
/** Node level metrics */
private final Collection<Pair<String, NodeMetricSnapshot>> nodeMetrics;
/**
* Cluster level metrics.
* Must be aggregated at fetch time to avoid issues with nodes and nodes joining/leaving the cluster over time.
*/
private final Map<ClusterSpec.Id, ClusterMetricSnapshot> clusterMetrics = new HashMap<>();
/** Creates this from a metrics/V2 response */
public MetricsResponse(String response, NodeList applicationNodes) {
this(SlimeUtils.jsonToSlime(response), applicationNodes);
}
public MetricsResponse(Collection<Pair<String, NodeMetricSnapshot>> metrics) {
this.nodeMetrics = metrics;
}
private MetricsResponse(Slime response, NodeList applicationNodes) {
nodeMetrics = new ArrayList<>();
Inspector root = response.get();
Inspector nodes = root.field("nodes");
nodes.traverse((ArrayTraverser)(__, node) -> consumeNode(node, applicationNodes));
}
public Collection<Pair<String, NodeMetricSnapshot>> nodeMetrics() { return nodeMetrics; }
public Map<ClusterSpec.Id, ClusterMetricSnapshot> clusterMetrics() { return clusterMetrics; }
private void consumeNode(Inspector nodeObject, NodeList applicationNodes) {
String hostname = nodeObject.field("hostname").asString();
Optional<Node> node = applicationNodes.node(hostname);
if (node.isEmpty()) return; // Node is not part of this cluster any longer
ListMap<String, Double> nodeValues = new ListMap<>();
Instant at = consumeNodeMetrics(nodeObject.field("node"), nodeValues);
consumeServiceMetrics(nodeObject.field("services"), nodeValues);
nodeMetrics.add(new Pair<>(hostname, new NodeMetricSnapshot(at,
new Load(Metric.cpu.from(nodeValues),
Metric.memory.from(nodeValues),
Metric.disk.from(nodeValues)),
(long)Metric.generation.from(nodeValues),
Metric.inService.from(nodeValues) > 0,
clusterIsStable(node.get(), applicationNodes),
Metric.queryRate.from(nodeValues))));
var cluster = node.get().allocation().get().membership().cluster().id();
var metrics = clusterMetrics.getOrDefault(cluster, ClusterMetricSnapshot.empty(at));
metrics = metrics.withQueryRate(metrics.queryRate() + Metric.queryRate.from(nodeValues));
metrics = metrics.withWriteRate(metrics.queryRate() + Metric.writeRate.from(nodeValues));
clusterMetrics.put(cluster, metrics);
}
private Instant consumeNodeMetrics(Inspector nodeObject, ListMap<String, Double> nodeValues) {
long timestampSecond = nodeObject.field("timestamp").asLong();
Instant at = Instant.ofEpochMilli(timestampSecond * 1000);
nodeObject.field("metrics").traverse((ArrayTraverser) (__, item) -> consumeMetricsItem(item, nodeValues));
return at;
}
private void consumeServiceMetrics(Inspector servicesObject, ListMap<String, Double> nodeValues) {
servicesObject.traverse((ArrayTraverser) (__, item) -> consumeServiceItem(item, nodeValues));
}
private void consumeServiceItem(Inspector serviceObject, ListMap<String, Double> nodeValues) {
serviceObject.field("metrics").traverse((ArrayTraverser) (__, item) -> consumeMetricsItem(item, nodeValues));
}
private void consumeMetricsItem(Inspector item, ListMap<String, Double> values) {
item.field("values").traverse((ObjectTraverser)(name, value) -> values.put(name, value.asDouble()));
}
private boolean clusterIsStable(Node node, NodeList applicationNodes) {
ClusterSpec cluster = node.allocation().get().membership().cluster();
return applicationNodes.cluster(cluster.id()).retired().isEmpty();
}
public static MetricsResponse empty() { return new MetricsResponse(List.of()); }
/** The metrics this can read */
private enum Metric {
cpu { // a node resource
@Override
public List<String> metricResponseNames() {
return List.of(HostedNodeAdminMetrics.CPU_UTIL.baseName(), HostedNodeAdminMetrics.GPU_UTIL.baseName());
}
@Override
double computeFinal(ListMap<String, Double> values) {
return values.values().stream().flatMap(List::stream).mapToDouble(v -> v).max().orElse(0) / 100; // % to ratio
}
},
memory { // a node resource
@Override
public List<String> metricResponseNames() {
return List.of(HostedNodeAdminMetrics.MEM_UTIL.baseName(),
SearchNodeMetrics.CONTENT_PROTON_RESOURCE_USAGE_MEMORY.average(),
HostedNodeAdminMetrics.GPU_MEM_USED.baseName(),
HostedNodeAdminMetrics.GPU_MEM_TOTAL.baseName());
}
@Override
double computeFinal(ListMap<String, Double> values) {
return Math.max(gpuMemUtil(values), cpuMemUtil(values));
}
private double cpuMemUtil(ListMap<String, Double> values) {
var valueList = values.get(SearchNodeMetrics.CONTENT_PROTON_RESOURCE_USAGE_MEMORY.average()); // prefer over mem.util
if ( ! valueList.isEmpty()) return valueList.get(0);
valueList = values.get(HostedNodeAdminMetrics.MEM_UTIL.baseName());
if ( ! valueList.isEmpty()) return valueList.get(0) / 100; // % to ratio
return 0;
}
private double gpuMemUtil(ListMap<String, Double> values) {
var usedGpuMemory = values.get(HostedNodeAdminMetrics.GPU_MEM_USED.baseName()).stream().mapToDouble(v -> v).sum();
var totalGpuMemory = values.get(HostedNodeAdminMetrics.GPU_MEM_TOTAL.baseName()).stream().mapToDouble(v -> v).sum();
return totalGpuMemory > 0 ? usedGpuMemory / totalGpuMemory : 0;
}
},
disk { // a node resource
@Override
public List<String> metricResponseNames() {
return List.of(HostedNodeAdminMetrics.DISK_UTIL.baseName(),
SearchNodeMetrics.CONTENT_PROTON_RESOURCE_USAGE_DISK.average());
}
@Override
double computeFinal(ListMap<String, Double> values) {
var valueList = values.get(SearchNodeMetrics.CONTENT_PROTON_RESOURCE_USAGE_DISK.average()); // prefer over mem.util
if ( ! valueList.isEmpty()) return valueList.get(0);
valueList = values.get(HostedNodeAdminMetrics.DISK_UTIL.baseName());
if ( ! valueList.isEmpty()) return valueList.get(0) / 100; // % to ratio
return 0;
}
},
generation { // application config generation active on the node
@Override
public List<String> metricResponseNames() {
return List.of(APPLICATION_GENERATION.last(), SearchNodeMetrics.CONTENT_PROTON_CONFIG_GENERATION.last());
}
@Override
double computeFinal(ListMap<String, Double> values) {
return values.values().stream().flatMap(List::stream).mapToDouble(v -> v).min().orElse(-1);
}
},
inService {
@Override
public List<String> metricResponseNames() { return List.of(IN_SERVICE.last()); }
@Override
double computeFinal(ListMap<String, Double> values) {
// Really a boolean. Default true. If any is oos -> oos.
return values.values().stream().flatMap(List::stream).anyMatch(v -> v == 0) ? 0 : 1;
}
},
queryRate { // queries per second
@Override
public List<String> metricResponseNames() {
return List.of(ContainerMetrics.QUERIES.rate(),
SearchNodeMetrics.CONTENT_PROTON_DOCUMENTDB_MATCHING_QUERIES.rate());
}
},
writeRate { // writes per second
@Override
public List<String> metricResponseNames() {
return List.of(ContainerMetrics.FEED_HTTP_REQUESTS.rate(),
StorageMetrics.VDS_FILESTOR_ALLTHREADS_PUT_COUNT.rate(),
StorageMetrics.VDS_FILESTOR_ALLTHREADS_REMOVE_COUNT.rate(),
StorageMetrics.VDS_FILESTOR_ALLTHREADS_UPDATE_COUNT.rate());
}
};
/**
* The names of this metric as emitted from its source.
* A map of the values of these names which were present in the response will
* be provided to computeFinal to decide on a single value.
*/
public abstract List<String> metricResponseNames();
/** Computes the final metric value */
double computeFinal(ListMap<String, Double> values) {
return values.values().stream().flatMap(List::stream).mapToDouble(v -> v).sum();
}
public double from(ListMap<String, Double> metricValues) {
ListMap<String, Double> values = new ListMap<>(metricValues);
values.keySet().retainAll(metricResponseNames());
return computeFinal(values);
}
}
}
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