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// Copyright 2019 Oath Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package ai.vespa.metricsproxy.gatherer;
import ai.vespa.metricsproxy.core.MetricsManager;
import ai.vespa.metricsproxy.metric.dimensions.ApplicationDimensions;
import ai.vespa.metricsproxy.metric.dimensions.NodeDimensions;
import ai.vespa.metricsproxy.metric.model.MetricsPacket;
import ai.vespa.metricsproxy.metric.model.StatusCode;
import ai.vespa.metricsproxy.metric.model.json.YamasJsonUtil;
import ai.vespa.metricsproxy.service.VespaServices;
import com.google.inject.Inject;
import com.yahoo.vespa.defaults.Defaults;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.IOException;
import java.io.UncheckedIOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.time.Instant;
import java.time.temporal.ChronoUnit;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.stream.Collectors;
import java.util.stream.Stream;
/**
* @author olaa
*/
public class NodeMetricGatherer {
private static final int COREDUMP_AGE_IN_MINUTES = 12600;
private static final JSONObject ROUTING_JSON = createRoutingJSON();
private final VespaServices vespaServices;
private final ApplicationDimensions applicationDimensions;
private final NodeDimensions nodeDimensions;
private final MetricsManager metricsManager;
private final FileWrapper fileWrapper;
private static final Logger logger = Logger.getLogger(NodeMetricGatherer.class.getSimpleName());
@Inject
public NodeMetricGatherer(MetricsManager metricsManager, VespaServices vespaServices, ApplicationDimensions applicationDimensions, NodeDimensions nodeDimensions) {
this(metricsManager, vespaServices, applicationDimensions, nodeDimensions, new FileWrapper());
}
public NodeMetricGatherer(MetricsManager metricsManager,
VespaServices vespaServices,
ApplicationDimensions applicationDimensions,
NodeDimensions nodeDimensions,
FileWrapper fileWrapper) {
this.metricsManager = metricsManager;
this.vespaServices = vespaServices;
this.applicationDimensions = applicationDimensions;
this.nodeDimensions = nodeDimensions;
this.fileWrapper = fileWrapper;
}
public List<MetricsPacket> gatherMetrics() {
List<MetricsPacket.Builder> metricPacketBuilders = new ArrayList<>();
metricPacketBuilders.addAll(coredumpMetrics());
metricPacketBuilders.addAll(serviceHealthMetrics());
metricPacketBuilders.addAll(hostLifeMetrics());
List<MetricsPacket> metricPackets = metricPacketBuilders.stream().map(metricPacketBuilder -> {
metricPacketBuilder.putDimensionsIfAbsent(applicationDimensions.getDimensions());
metricPacketBuilder.putDimensionsIfAbsent(nodeDimensions.getDimensions());
metricPacketBuilder.putDimensionsIfAbsent(metricsManager.getExtraDimensions());
return metricPacketBuilder.build();
}).collect(Collectors.toList());
return metricPackets;
}
private List<MetricsPacket.Builder> coredumpMetrics() {
Path crashPath = Path.of(Defaults.getDefaults().underVespaHome("var/crash/processing"));
long coredumps = getCoredumpsFromLastPeriod(crashPath);
try {
JSONObject jsonObject = new JSONObject();
jsonObject.put("application", "Vespa.node");
jsonObject.put("timestamp", Instant.now().getEpochSecond());
jsonObject.put("application", "system-coredumps-processing");
jsonObject.put("status_code", coredumps);
jsonObject.put("status_message", coredumps == 0 ? "OK" : String.format("Found %d coredumps in past %d minutes", coredumps, COREDUMP_AGE_IN_MINUTES));
jsonObject.put("routing", ROUTING_JSON);
return YamasJsonUtil.toMetricsPackets(jsonObject.toString());
} catch (JSONException e) {
logger.log(Level.WARNING, "Error writing JSON", e);
return Collections.emptyList();
}
}
private List<MetricsPacket.Builder> serviceHealthMetrics() {
return vespaServices.getVespaServices()
.stream()
.map(service -> {
try {
StatusCode healthStatus = service.getHealth().getStatus();
JSONObject jsonObject = new JSONObject();
jsonObject.put("status_code", healthStatus.code);
jsonObject.put("status_message", healthStatus.status);
jsonObject.put("application", service.getMonitoringName());
JSONObject dimensions = new JSONObject();
dimensions.put("instance", service.getInstanceName());
dimensions.put("metrictype", "health");
jsonObject.put("dimensions", dimensions);
jsonObject.put("routing", ROUTING_JSON);
return YamasJsonUtil.toMetricsPackets(jsonObject.toString()).get(0);
} catch (JSONException e) {
throw new RuntimeException(e.getMessage());
}
})
.collect(Collectors.toList());
}
private List<MetricsPacket.Builder> hostLifeMetrics() {
JSONObject jsonObject = new JSONObject();
double upTime;
int statusCode = 0;
String statusMessage = "OK";
try {
upTime = getHostLife(Path.of("/proc/uptime")); // ??
} catch (IOException e) {
upTime = 0d;
statusCode = 1;
statusMessage = e.getMessage();
}
try {
jsonObject.put("application", "host_life");
jsonObject.put("timestamp", Instant.now().getEpochSecond());
jsonObject.put("status_message", statusMessage);
jsonObject.put("status_code", statusCode);
JSONObject metrics = new JSONObject();
metrics.put("uptime", upTime);
metrics.put("alive", 1);
jsonObject.put("metrics", metrics);
jsonObject.put("routing", ROUTING_JSON);
return YamasJsonUtil.toMetricsPackets(jsonObject.toString());
} catch (JSONException e) {
logger.log(Level.WARNING, "Error writing JSON", e);
return Collections.emptyList();
}
}
private long getCoredumpsFromLastPeriod(Path coreDumpPath) {
try {
return fileWrapper.walkTree(coreDumpPath)
.filter(Files::isRegularFile)
.filter(this::isNewFile)
.count();
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
private double getHostLife(Path uptimePath) throws IOException {
return fileWrapper.readAllLines(uptimePath)
.stream()
.mapToDouble(line -> Double.valueOf(line.split("\\s")[0]))
.findFirst()
.orElseThrow();
}
private boolean isNewFile(Path file) {
try {
return fileWrapper.getLastModifiedTime(file)
.plus(COREDUMP_AGE_IN_MINUTES, ChronoUnit.MINUTES)
.isBefore(Instant.now());
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
private static JSONObject createRoutingJSON() {
try {
JSONObject jsonObject = new JSONObject("{\"yamas\":{\"namespaces\":[\"Vespa\"]}}");
return jsonObject;
} catch (JSONException e) {
throw new RuntimeException(e);
}
}
static class FileWrapper {
List<String> readAllLines(Path path) throws IOException {
return Files.readAllLines(path);
}
Stream<Path> walkTree(Path path) throws IOException {
return Files.walk(path);
}
Instant getLastModifiedTime(Path path) throws IOException {
return Files.getLastModifiedTime(path).toInstant();
}
}
}
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