From fb7d85de8d79b6a8d501267ae96e13eae0354606 Mon Sep 17 00:00:00 2001 From: karl-sy <71377602+karl-sy@users.noreply.github.com> Date: Wed, 27 Dec 2023 19:19:55 +0800 Subject: [PATCH] metric: Add Prometheus exporter module for Sentinel metrics (#3173) --- sentinel-extension/pom.xml | 1 + .../README.md | 102 ++++++++++++++ .../pom.xml | 42 ++++++ .../sentinel/metric/prom/MetricConstants.java | 51 +++++++ .../metric/prom/PromExporterInit.java | 54 ++++++++ .../prom/collector/SentinelCollector.java | 127 ++++++++++++++++++ .../prom/config/PrometheusGlobalConfig.java | 93 +++++++++++++ .../metric/prom/types/GaugeMetricFamily.java | 58 ++++++++ .../com.alibaba.csp.sentinel.init.InitFunc | 1 + .../prom/collector/SentinelCollectorTest.java | 17 +++ .../prom/types/GaugeMetricFamilyTest.java | 18 +++ 11 files changed, 564 insertions(+) create mode 100644 sentinel-extension/sentinel-prometheus-metric-exporter/README.md create mode 100644 sentinel-extension/sentinel-prometheus-metric-exporter/pom.xml create mode 100644 sentinel-extension/sentinel-prometheus-metric-exporter/src/main/java/com/alibaba/csp/sentinel/metric/prom/MetricConstants.java create mode 100644 sentinel-extension/sentinel-prometheus-metric-exporter/src/main/java/com/alibaba/csp/sentinel/metric/prom/PromExporterInit.java create mode 100644 sentinel-extension/sentinel-prometheus-metric-exporter/src/main/java/com/alibaba/csp/sentinel/metric/prom/collector/SentinelCollector.java create mode 100644 sentinel-extension/sentinel-prometheus-metric-exporter/src/main/java/com/alibaba/csp/sentinel/metric/prom/config/PrometheusGlobalConfig.java create mode 100644 sentinel-extension/sentinel-prometheus-metric-exporter/src/main/java/com/alibaba/csp/sentinel/metric/prom/types/GaugeMetricFamily.java create mode 100644 sentinel-extension/sentinel-prometheus-metric-exporter/src/main/resources/META-INF/services/com.alibaba.csp.sentinel.init.InitFunc create mode 100644 sentinel-extension/sentinel-prometheus-metric-exporter/src/test/java/com/alibaba/csp/sentinel/metric/prom/collector/SentinelCollectorTest.java create mode 100644 sentinel-extension/sentinel-prometheus-metric-exporter/src/test/java/com/alibaba/csp/sentinel/metric/prom/types/GaugeMetricFamilyTest.java diff --git a/sentinel-extension/pom.xml b/sentinel-extension/pom.xml index b53c5ba49f..2b29fb936c 100755 --- a/sentinel-extension/pom.xml +++ b/sentinel-extension/pom.xml @@ -25,6 +25,7 @@ sentinel-datasource-eureka sentinel-annotation-cdi-interceptor sentinel-metric-exporter + sentinel-prometheus-metric-exporter sentinel-datasource-opensergo sentinel-datasource-xds diff --git a/sentinel-extension/sentinel-prometheus-metric-exporter/README.md b/sentinel-extension/sentinel-prometheus-metric-exporter/README.md new file mode 100644 index 0000000000..4e98473199 --- /dev/null +++ b/sentinel-extension/sentinel-prometheus-metric-exporter/README.md @@ -0,0 +1,102 @@ +# Sentinel Prometheus Exporter + +Sentinel Prometheus Exporter is a module which provides the Sentinel metrics data for prometheus. + +You can integrate it into your Sentinel application, and then get the sentinel metrics in your prometheus. + +## How it works + +when the prometheus server collect the sentinel metrics,it get metrics from sentinel logs +![image](https://github.com/alibaba/Sentinel/assets/71377602/2982209b-a3c7-403b-ae50-1dc7a17f90b7) + +## How to use + +To use Sentinel Prometheus Exporter, you should add the following dependency: + +### 1. add sentinel-prometheus-exporter + +```xml + + com.alibaba.csp + sentinel-prometheus-metric-exporter + x.y.z + +``` + +### 2. add prometheus dependency + +```xml + + io.prometheus + simpleclient + 0.3.0 + +``` + +```xml + + io.prometheus + simpleclient_httpserver + 0.3.0 + +``` + +### 3. set prometheus.yml with fetch config + +```yaml +scrape_configs: +- job_name: 'sentinelMetrics' + static_configs: + - targets: ['localhost:9092'] +``` + +```yaml +Note: the port needs to be the same as the value in the configuration (csp.sentinel.prometheus.fetch.port) +``` + +## Params for exporter + +you can set system params to control the exporter behavior + +### 1.csp.sentinel.prometheus.fetch.port + +the port for prometheus exporter,default 9092 + +### 2.csp.sentinel.prometheus.fetch.size + +the max fetch nums for prometheus exporter,in case the memory is not enough,default 1024 + +### 3.csp.sentinel.prometheus.fetch.delay + +the delay time for fetching , may be it is still do some statistics work according to the sliding window size when fetching, + +so need to set the delay time to insure the accuracy. + +unit: second + +default: 0 + +### 4.csp.sentinel.prometheus.fetch.identify + +set the resource which need to fetch,default null,fetch all resources + +### 5.csp.sentinel.prometheus.fetch.types + +the types need to fetch,such as passQps,concurrency + +format: "xx|xx|xx" + +default: "passQps|blockQps|exceptionQps|rt|concurrency" + +you can reset the types as you need to,exm: "passQps|rt|concurrency|occupiedPassQps" + +the type is same as the MetricNode class variables, with range: +{"passQps","blockQps","successQps","exceptionQps","rt","occupiedPassQps","concurrency"} + +### 6.csp.sentinel.prometheus.app + +set the appName when do PromSQL + +## how it looks + +![image](https://github.com/alibaba/Sentinel/assets/71377602/dedde134-53ed-4b4e-b184-98e55184aacf) diff --git a/sentinel-extension/sentinel-prometheus-metric-exporter/pom.xml b/sentinel-extension/sentinel-prometheus-metric-exporter/pom.xml new file mode 100644 index 0000000000..f493b77720 --- /dev/null +++ b/sentinel-extension/sentinel-prometheus-metric-exporter/pom.xml @@ -0,0 +1,42 @@ + + + 4.0.0 + + com.alibaba.csp + sentinel-parent + 2.0.0-alpha + ../../pom.xml + + + sentinel-prometheus-metric-exporter + + + + com.alibaba.csp + sentinel-core + + + + io.prometheus + simpleclient + 0.3.0 + provided + + + + io.prometheus + simpleclient_httpserver + 0.3.0 + provided + + + + junit + junit + test + + + + \ No newline at end of file diff --git a/sentinel-extension/sentinel-prometheus-metric-exporter/src/main/java/com/alibaba/csp/sentinel/metric/prom/MetricConstants.java b/sentinel-extension/sentinel-prometheus-metric-exporter/src/main/java/com/alibaba/csp/sentinel/metric/prom/MetricConstants.java new file mode 100644 index 0000000000..8c8800d535 --- /dev/null +++ b/sentinel-extension/sentinel-prometheus-metric-exporter/src/main/java/com/alibaba/csp/sentinel/metric/prom/MetricConstants.java @@ -0,0 +1,51 @@ +/* + * Copyright 1999-2019 Alibaba Group Holding Ltd. + * + * Licensed 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 + * + * https://www.apache.org/licenses/LICENSE-2.0 + * + * 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 com.alibaba.csp.sentinel.metric.prom; + +/** + * The{@link PromExporterInit} the Collector for prometheus exporter. + * + * @author karl-sy + * @date 2023-08-08 09:30 + * @since 2.0.0 + */ +public final class MetricConstants { + + public static final String METRIC_HELP = "sentinel_metrics"; + + public static final String RESOURCE = "resource"; + + public static final String CLASSIFICATION = "classification"; + + public static final String METRIC_TYPE = "type"; + + public static final String PASS_QPS = "passQps"; + + public static final String BLOCK_QPS = "blockQps"; + + public static final String SUCCESS_QPS = "successQps"; + + public static final String EXCEPTION_QPS = "exceptionQps"; + + public static final String RT = "rt"; + + public static final String OCC_PASS_QPS = "occupiedPassQps"; + + public static final String CONCURRENCY = "concurrency"; + + private MetricConstants() { + } +} diff --git a/sentinel-extension/sentinel-prometheus-metric-exporter/src/main/java/com/alibaba/csp/sentinel/metric/prom/PromExporterInit.java b/sentinel-extension/sentinel-prometheus-metric-exporter/src/main/java/com/alibaba/csp/sentinel/metric/prom/PromExporterInit.java new file mode 100644 index 0000000000..7488a0095d --- /dev/null +++ b/sentinel-extension/sentinel-prometheus-metric-exporter/src/main/java/com/alibaba/csp/sentinel/metric/prom/PromExporterInit.java @@ -0,0 +1,54 @@ +/* + * Copyright 1999-2021 Alibaba Group Holding Ltd. + * + * Licensed 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 + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * 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 com.alibaba.csp.sentinel.metric.prom; + +import com.alibaba.csp.sentinel.init.InitFunc; +import com.alibaba.csp.sentinel.log.RecordLog; +import com.alibaba.csp.sentinel.metric.prom.collector.SentinelCollector; +import com.alibaba.csp.sentinel.metric.prom.config.PrometheusGlobalConfig; +import io.prometheus.client.exporter.HTTPServer; + +/** + * The{@link PromExporterInit} the InitFunc for prometheus exporter. + * + * @author karl-sy + * @date 2023-07-13 21:15 + * @since 2.0.0 + */ +public class PromExporterInit implements InitFunc { + + @Override + public void init() throws Exception { + HTTPServer server = null; + try { + new SentinelCollector().register(); + // 开启http服务供prometheus调用 + // 默认只提供一个接口 http://ip:port/metrics，返回所有指标 + int promPort = PrometheusGlobalConfig.getPromFetchPort(); + server = new HTTPServer(promPort); + } catch (Throwable e) { + RecordLog.warn("[PromExporterInit] failed to init prometheus exporter with exception:", e); + } + + HTTPServer finalServer = server; + Runtime.getRuntime().addShutdownHook(new Thread(() -> { + if (finalServer != null) { + finalServer.stop(); + } + })); + } + +} diff --git a/sentinel-extension/sentinel-prometheus-metric-exporter/src/main/java/com/alibaba/csp/sentinel/metric/prom/collector/SentinelCollector.java b/sentinel-extension/sentinel-prometheus-metric-exporter/src/main/java/com/alibaba/csp/sentinel/metric/prom/collector/SentinelCollector.java new file mode 100644 index 0000000000..a3a72865a7 --- /dev/null +++ b/sentinel-extension/sentinel-prometheus-metric-exporter/src/main/java/com/alibaba/csp/sentinel/metric/prom/collector/SentinelCollector.java @@ -0,0 +1,127 @@ +/* + * Copyright 1999-2021 Alibaba Group Holding Ltd. + * + * Licensed 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 + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * 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 com.alibaba.csp.sentinel.metric.prom.collector; + +import com.alibaba.csp.sentinel.config.SentinelConfig; +import com.alibaba.csp.sentinel.log.RecordLog; +import com.alibaba.csp.sentinel.metric.prom.MetricConstants; +import com.alibaba.csp.sentinel.metric.prom.config.PrometheusGlobalConfig; +import com.alibaba.csp.sentinel.metric.prom.types.GaugeMetricFamily; +import com.alibaba.csp.sentinel.node.metric.MetricNode; +import com.alibaba.csp.sentinel.node.metric.MetricSearcher; +import com.alibaba.csp.sentinel.node.metric.MetricWriter; +import com.alibaba.csp.sentinel.util.PidUtil; +import io.prometheus.client.Collector; + +import java.util.ArrayList; +import java.util.Arrays; +import java.util.List; + +/** + * The{@link PromExporterInit} Collector for prometheus exporter. + * + * @author karl-sy + * @date 2023-07-13 21:15 + * @since 2.0.0 + */ +public class SentinelCollector extends Collector { + + private final Object lock = new Object(); + + private static final int ONE_SECOND = 1000; + private static final String appName = PrometheusGlobalConfig.getPromFetchApp(); + + private static final String[] types = PrometheusGlobalConfig.getPromFetchTypes(); + + private static final String identify = PrometheusGlobalConfig.getPromFetchIdentify(); + + private static final int fetchSize = PrometheusGlobalConfig.getPromFetchSize(); + + private static final int delayTime = PrometheusGlobalConfig.getPromFetchDelayTime(); + + private volatile MetricSearcher searcher; + + private volatile Long lastFetchTime; + + @Override + public List collect() { + if (searcher == null) { + synchronized (lock) { + if (searcher == null) { + searcher = new MetricSearcher(MetricWriter.METRIC_BASE_DIR, + MetricWriter.formMetricFileName(SentinelConfig.getAppName(), PidUtil.getPid())); + } + RecordLog.warn("[SentinelCollector] init sentinel metrics searcher with appName:{}", appName); + lastFetchTime = System.currentTimeMillis() / ONE_SECOND * ONE_SECOND; + } + } + + List list = new ArrayList<>(); + + long endTime = System.currentTimeMillis() / ONE_SECOND * ONE_SECOND - (long) delayTime * ONE_SECOND; + try { + List nodes = searcher.findByTimeAndResource(lastFetchTime, endTime, identify); + if(nodes == null){ + return list; + } + if(nodes.size() > fetchSize){ + nodes = nodes.subList(0,fetchSize); + } + GaugeMetricFamily metricFamily = new GaugeMetricFamily(appName, MetricConstants.METRIC_HELP, + Arrays.asList(MetricConstants.RESOURCE, MetricConstants.CLASSIFICATION, + MetricConstants.METRIC_TYPE)); + for (MetricNode node : nodes) { + long recordTime = node.getTimestamp(); + for (String type : types) { + double val = getTypeVal(node,type); + metricFamily.addMetric(Arrays.asList(node.getResource(), String.valueOf(node.getClassification()),type), val,recordTime); + } + } + list.add(metricFamily); + } catch (Exception e) { + RecordLog.warn("[SentinelCollector] failed to fetch sentinel metrics with exception:", e); + }finally { + lastFetchTime = endTime + ONE_SECOND; + } + + return list; + } + + public double getTypeVal(MetricNode node,String type){ + if(MetricConstants.PASS_QPS.equals(type)){ + return node.getPassQps(); + } + if(MetricConstants.BLOCK_QPS.equals(type)){ + return node.getBlockQps(); + } + if(MetricConstants.SUCCESS_QPS.equals(type)){ + return node.getSuccessQps(); + } + if(MetricConstants.EXCEPTION_QPS.equals(type)){ + return node.getExceptionQps(); + } + if(MetricConstants.RT.equals(type)){ + return node.getRt(); + } + if(MetricConstants.OCC_PASS_QPS.equals(type)){ + return node.getOccupiedPassQps(); + } + if(MetricConstants.CONCURRENCY.equals(type)){ + return node.getConcurrency(); + } + return -1.0; + } +} diff --git a/sentinel-extension/sentinel-prometheus-metric-exporter/src/main/java/com/alibaba/csp/sentinel/metric/prom/config/PrometheusGlobalConfig.java b/sentinel-extension/sentinel-prometheus-metric-exporter/src/main/java/com/alibaba/csp/sentinel/metric/prom/config/PrometheusGlobalConfig.java new file mode 100644 index 0000000000..65667715ba --- /dev/null +++ b/sentinel-extension/sentinel-prometheus-metric-exporter/src/main/java/com/alibaba/csp/sentinel/metric/prom/config/PrometheusGlobalConfig.java @@ -0,0 +1,93 @@ +/* + * Copyright 1999-2021 Alibaba Group Holding Ltd. + * + * Licensed 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 + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * 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 com.alibaba.csp.sentinel.metric.prom.config; + +import com.alibaba.csp.sentinel.config.SentinelConfig; +import com.alibaba.csp.sentinel.util.StringUtil; + +/** + * The config for prometheus exporter. + * + * @author karl-sy + * @date 2023-07-13 21:15 + * @since 2.0.0 + */ +public class PrometheusGlobalConfig { + + public static final String PROM_FETCH_PORT = "csp.sentinel.prometheus.fetch.port"; + public static final String DEFAULT_PROM_FETCH_PORT = "9092"; + + public static final String PROM_FETCH_SIZE = "csp.sentinel.prometheus.fetch.size"; + public static final String DEFAULT_PROM_FETCH_SIZE = "1024"; + + public static final String PROM_FETCH_DELAY = "csp.sentinel.prometheus.fetch.delay"; + public static final String DEFAULT_PROM_FETCH_DELAY = "0"; + + public static final String PROM_FETCH_IDENTIFY = "csp.sentinel.prometheus.fetch.identify"; + + public static final String PROM_FETCH_TYPES = "csp.sentinel.prometheus.fetch.types"; + public static final String DEFAULT_PROM_FETCH_TYPES = "passQps|blockQps|exceptionQps|rt|concurrency"; + + public static final String PROM_APP = "csp.sentinel.prometheus.app"; + public static final String DEFAULT_PROM_APP = "SENTINEL_APP"; + + public static int getPromFetchPort() { + String config = SentinelConfig.getConfig(PROM_FETCH_PORT); + config = StringUtil.isNotBlank(config) ? config : DEFAULT_PROM_FETCH_PORT; + return Integer.parseInt(config); + } + + public static int getPromFetchSize() { + String config = SentinelConfig.getConfig(PROM_FETCH_SIZE); + config = StringUtil.isNotBlank(config) ? config : DEFAULT_PROM_FETCH_SIZE; + return Integer.parseInt(config); + } + + public static int getPromFetchDelayTime() { + String config = SentinelConfig.getConfig(PROM_FETCH_DELAY); + config = StringUtil.isNotBlank(config) ? config : DEFAULT_PROM_FETCH_DELAY; + return Integer.parseInt(config); + } + + public static String getPromFetchIdentify() { + return SentinelConfig.getConfig(PROM_FETCH_IDENTIFY); + } + + public static String[] getPromFetchTypes() { + String config = SentinelConfig.getConfig(PROM_FETCH_TYPES); + config = StringUtil.isNotBlank(config) ? config : DEFAULT_PROM_FETCH_TYPES; + try { + return config.split("\\|"); + }catch (Throwable e){ + return DEFAULT_PROM_FETCH_TYPES.split("\\|"); + } + } + + public static String getPromFetchApp() { + String appName = SentinelConfig.getConfig(PROM_APP); + if (appName == null) { + appName = SentinelConfig.getAppName(); + } + + if (appName == null) { + appName = DEFAULT_PROM_APP; + } + appName = appName.replaceAll("\\.","_"); + appName = appName.replaceAll("-","_"); + return appName; + } + +} diff --git a/sentinel-extension/sentinel-prometheus-metric-exporter/src/main/java/com/alibaba/csp/sentinel/metric/prom/types/GaugeMetricFamily.java b/sentinel-extension/sentinel-prometheus-metric-exporter/src/main/java/com/alibaba/csp/sentinel/metric/prom/types/GaugeMetricFamily.java new file mode 100644 index 0000000000..45e6982c1f --- /dev/null +++ b/sentinel-extension/sentinel-prometheus-metric-exporter/src/main/java/com/alibaba/csp/sentinel/metric/prom/types/GaugeMetricFamily.java @@ -0,0 +1,58 @@ +/* + * Copyright 1999-2021 Alibaba Group Holding Ltd. + * + * Licensed 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 + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * 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 com.alibaba.csp.sentinel.metric.prom.types; + + +import io.prometheus.client.Collector; + +import java.util.ArrayList; +import java.util.Collections; +import java.util.List; + +/** + * The{@link SentinelCollector} the MetricFamilySamples for prometheus exporter. + * + * @author karl-sy + * @date 2023-07-13 21:15 + * @since 2.0.0 + */ +public class GaugeMetricFamily extends Collector.MetricFamilySamples { + + private final List labelNames; + + public GaugeMetricFamily(String name, String help, double value) { + super(name, Collector.Type.GAUGE, help, new ArrayList()); + labelNames = Collections.emptyList(); + samples.add(new Sample( + name, + labelNames, + Collections.emptyList(), + value)); + } + + public GaugeMetricFamily(String name, String help, List labelNames) { + super(name, Collector.Type.GAUGE, help, new ArrayList()); + this.labelNames = labelNames; + } + + public GaugeMetricFamily addMetric(List labelValues, double value, long timestampMs) { + if (labelValues.size() != labelNames.size()) { + throw new IllegalArgumentException("Incorrect number of labels."); + } + samples.add(new Sample(name, labelNames, labelValues, value, timestampMs)); + return this; + } +} \ No newline at end of file diff --git a/sentinel-extension/sentinel-prometheus-metric-exporter/src/main/resources/META-INF/services/com.alibaba.csp.sentinel.init.InitFunc b/sentinel-extension/sentinel-prometheus-metric-exporter/src/main/resources/META-INF/services/com.alibaba.csp.sentinel.init.InitFunc new file mode 100644 index 0000000000..17781b921d --- /dev/null +++ b/sentinel-extension/sentinel-prometheus-metric-exporter/src/main/resources/META-INF/services/com.alibaba.csp.sentinel.init.InitFunc @@ -0,0 +1 @@ +com.alibaba.csp.sentinel.metric.prom.PromExporterInit \ No newline at end of file diff --git a/sentinel-extension/sentinel-prometheus-metric-exporter/src/test/java/com/alibaba/csp/sentinel/metric/prom/collector/SentinelCollectorTest.java b/sentinel-extension/sentinel-prometheus-metric-exporter/src/test/java/com/alibaba/csp/sentinel/metric/prom/collector/SentinelCollectorTest.java new file mode 100644 index 0000000000..1e61d8799f --- /dev/null +++ b/sentinel-extension/sentinel-prometheus-metric-exporter/src/test/java/com/alibaba/csp/sentinel/metric/prom/collector/SentinelCollectorTest.java @@ -0,0 +1,17 @@ +package com.alibaba.csp.sentinel.metric.prom.collector; + +import com.alibaba.csp.sentinel.node.metric.MetricNode; +import org.junit.Assert; +import org.junit.Test; + +public class SentinelCollectorTest { + @Test + public void testCollector(){ + SentinelCollector collector = new SentinelCollector(); + + MetricNode node = new MetricNode(); + node.setPassQps(10); + double val = collector.getTypeVal(node,"passQps"); + Assert.assertEquals(val, 10,1e-4); + } +} diff --git a/sentinel-extension/sentinel-prometheus-metric-exporter/src/test/java/com/alibaba/csp/sentinel/metric/prom/types/GaugeMetricFamilyTest.java b/sentinel-extension/sentinel-prometheus-metric-exporter/src/test/java/com/alibaba/csp/sentinel/metric/prom/types/GaugeMetricFamilyTest.java new file mode 100644 index 0000000000..b84717deee --- /dev/null +++ b/sentinel-extension/sentinel-prometheus-metric-exporter/src/test/java/com/alibaba/csp/sentinel/metric/prom/types/GaugeMetricFamilyTest.java @@ -0,0 +1,18 @@ +package com.alibaba.csp.sentinel.metric.prom.types; + +import org.junit.Assert; +import org.junit.Test; + +import java.util.Collections; + +public class GaugeMetricFamilyTest { + + @Test + public void testGaugeMetricFamily(){ + + GaugeMetricFamily metricFamily = new GaugeMetricFamily("appName", + "sentinel_metrics", Collections.singletonList("type")); + metricFamily.addMetric(Collections.singletonList("rt"), 1.0,System.currentTimeMillis()); + Assert.assertEquals(metricFamily.samples.get(0).value, 1.0,1e-4); + } +}