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Posted to common-issues@hadoop.apache.org by GitBox <gi...@apache.org> on 2020/01/03 02:01:55 UTC
[GitHub] [hadoop] XuQianJin-Stars commented on a change in pull request
#1787: [HADOOP-16783] Exports Hadoop metrics to Prometheus PushGateWay
XuQianJin-Stars commented on a change in pull request #1787: [HADOOP-16783] Exports Hadoop metrics to Prometheus PushGateWay
URL: https://github.com/apache/hadoop/pull/1787#discussion_r362689844
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File path: hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics2/sink/prometheus/PushGatewaySink.java
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@@ -0,0 +1,191 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
+ * agreements. See the NOTICE file distributed with this work for additional information regarding
+ * copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with the License. You may obtain
+ * a copy of the License at
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * Unless required by applicable law or agreed to in writing, software distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package org.apache.hadoop.metrics2.sink.prometheus;
+
+import org.apache.commons.configuration2.SubsetConfiguration;
+import org.apache.commons.lang3.StringUtils;
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.classification.InterfaceStability;
+import org.apache.hadoop.metrics2.AbstractMetric;
+import org.apache.hadoop.metrics2.MetricsException;
+import org.apache.hadoop.metrics2.MetricsRecord;
+import org.apache.hadoop.metrics2.MetricsSink;
+import org.apache.hadoop.metrics2.MetricsTag;
+
+import io.prometheus.client.CollectorRegistry;
+import io.prometheus.client.Counter;
+import io.prometheus.client.Gauge;
+import io.prometheus.client.exporter.PushGateway;
+
+import java.io.Closeable;
+import java.io.IOException;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.regex.Pattern;
+
+import static org.apache.hadoop.metrics2.MetricType.COUNTER;
+import static org.apache.hadoop.metrics2.MetricType.GAUGE;
+
+@InterfaceAudience.Public
+@InterfaceStability.Evolving
+public class PushGatewaySink implements MetricsSink, Closeable {
+
+ private static final Log LOG = LogFactory.getLog(PushGatewaySink.class);
+
+ private static final String APP_ID = "app_id";
+ private static final String JOB_NAME = "job";
+ private static final String HOST_KEY = "host";
+ private static final String PORT_KEY = "port";
+ private static final String GROUP_KEY = "groupingKey";
+
+ private static final Pattern SPLIT_PATTERN =
+ Pattern.compile("(?<!(^|[A-Z_]))(?=[A-Z])|(?<!^)(?=[A-Z][a-z])");
+
+ private static final String NUM_OPEN_CONNECTION_SPERUSER = "numopenconnectionsperuser";
+
+ private static final String NULL = "null";
+
+ private Map<String, String> groupingKey;
+ private PushGateway pg = null;
+ private String jobName;
+
+ @Override
+ public void init(SubsetConfiguration conf) {
+ // Get PushGateWay host configurations.
+ jobName = conf.getString(JOB_NAME, "hadoop-job");
+ final String serverHost = conf.getString(HOST_KEY);
+ final int serverPort = Integer.parseInt(conf.getString(PORT_KEY));
+
+ if (serverHost == null || serverHost.isEmpty() || serverPort < 1) {
+ throw new MetricsException(
+ "Invalid host/port configuration. Host: " + serverHost + " Port: " + serverPort);
+ }
+
+ groupingKey = parseGroupingKey(conf.getString(GROUP_KEY, ""));
+ pg = new PushGateway(serverHost + ':' + serverPort);
+ }
+
+ @Override
+ public void putMetrics(MetricsRecord metricsRecord) {
+ try {
+ CollectorRegistry registry = new CollectorRegistry();
+ for (AbstractMetric metrics : metricsRecord.metrics()) {
+ if (metrics.type() == COUNTER
+ || metrics.type() == GAUGE) {
+
+ String key = getMetricsName(
+ metricsRecord.name(), metrics.name()).replace(" ", "");
+
+ int tagSize = metricsRecord.tags().size();
+ String[] labelNames = new String[tagSize];
+ String[] labelValues = new String[tagSize];
+ int index = 0;
+ for (MetricsTag tag : metricsRecord.tags()) {
+ String tagName = tag.name().toLowerCase();
+
+ //ignore specific tag which includes sub-hierarchy
+ if (NUM_OPEN_CONNECTION_SPERUSER.equals(tagName)) {
+ continue;
+ }
+ labelNames[index] = tagName;
+ labelValues[index] =
+ tag.value() == null ? NULL : tag.value();
+ index++;
+ }
+
+ switch (metrics.type()) {
+ case GAUGE:
+ Gauge.build(key, key)
+ .labelNames(labelNames)
+ .register(registry)
+ .labels(labelValues)
+ .set(metrics.value().doubleValue());
+ break;
+ case COUNTER:
+ Counter.build(key, key)
+ .labelNames(labelNames)
+ .register(registry)
+ .labels(labelValues)
+ .inc(metrics.value().doubleValue());
+ break;
+ default:
+ break;
+ }
+ LOG.debug(
+ "register succeed, metrics name is: " + key + " Type is :" + metrics.type().toString()
+ + " tag is: " + Arrays.toString(labelNames)
+ + " tagValue is " + Arrays.toString(labelValues)
+ + " Value is : " + metrics.value().toString());
+ }
+ }
+ pg.push(registry, jobName, groupingKey);
+ LOG.info("pushing succeed");
+ } catch (Exception e) {
+ LOG.error("pushing job's metrics to gateway is failed ", e);
+ }
+ }
+
+ /**
+ * Convert CamelCase based names to lower-case names where the separator is the underscore, to
+ * follow prometheus naming conventions.
+ */
+ public String getMetricsName(String recordName,
+ String metricName) {
+ String baseName = StringUtils.capitalize(recordName)
+ + StringUtils.capitalize(metricName);
+ baseName = baseName.replace('-', '_');
+ String[] parts = SPLIT_PATTERN.split(baseName);
+ return String.join("_", parts).toLowerCase();
+ }
+
+ Map<String, String> parseGroupingKey(final String groupingKeyConfig) {
+ if (!groupingKeyConfig.isEmpty()) {
+ Map<String, String> groupingKey = new HashMap<>();
+ String[] kvs = groupingKeyConfig.split(";");
+ for (String kv : kvs) {
+ int idx = kv.indexOf("=");
+ if (idx < 0) {
+ LOG.warn("Invalid prometheusPushGateway groupingKey:" + kv + ", will be ignored");
+ continue;
+ }
+
+ String labelKey = kv.substring(0, idx);
+ String labelValue = kv.substring(idx + 1);
+ if (StringUtils.isEmpty(labelKey) || StringUtils.isEmpty(labelValue)) {
+ LOG.warn("Invalid groupingKey labelKey:" + labelKey + ", labelValue:" + labelValue
+ + " must not be empty");
+ continue;
+ }
+ groupingKey.put(labelKey, labelValue);
+ }
+ return groupingKey;
+ }
+ return Collections.emptyMap();
+ }
+
+ @Override
+ public void flush() {
+
+ }
+
+ @Override
+ public void close() throws IOException {
Review comment:
> push gateway
Push gateway is not a port service and cannot be closed.
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