Check the health status of Sentinel DataSource using AbstractDataSource#loadConfig.

spring-cloud-alibaba-examples/sentinel-example/sentinel-core-example/src/main/resources/application.properties

@@ -3,6 +3,10 @@ server.port=18083
 management.endpoints.web.exposure.include=*
 management.endpoint.health.show-details=always
 
+# we can disable health check, default is enable
+management.health.diskspace.enabled=false
+# management.health.sentinel.enabled=false
+
 spring.cloud.sentinel.transport.dashboard=localhost:8080
 spring.cloud.sentinel.eager=true
 

spring-cloud-alibaba-sentinel/src/main/java/org/springframework/cloud/alibaba/sentinel/endpoint/SentinelEndpointAutoConfiguration.java

@@ -16,6 +16,7 @@
 
 package org.springframework.cloud.alibaba.sentinel.endpoint;
 
+import org.springframework.beans.factory.support.DefaultListableBeanFactory;
 import org.springframework.boot.actuate.autoconfigure.endpoint.condition.ConditionalOnEnabledEndpoint;
 import org.springframework.boot.actuate.autoconfigure.health.ConditionalOnEnabledHealthIndicator;
 import org.springframework.boot.actuate.endpoint.annotation.Endpoint;
@@ -42,7 +43,7 @@ public class SentinelEndpointAutoConfiguration {
 	@Bean
 	@ConditionalOnMissingBean
 	@ConditionalOnEnabledHealthIndicator("sentinel")
-	public SentinelHealthIndicator sentinelHealthIndicator(SentinelProperties sentinelProperties) {
+	public SentinelHealthIndicator sentinelHealthIndicator(DefaultListableBeanFactory beanFactory, SentinelProperties sentinelProperties) {
-		return new SentinelHealthIndicator(sentinelProperties);
+		return new SentinelHealthIndicator(beanFactory, sentinelProperties);
 	}
 }

spring-cloud-alibaba-sentinel/src/main/java/org/springframework/cloud/alibaba/sentinel/endpoint/SentinelHealthIndicator.java

@@ -1,8 +1,26 @@
+/*
+ * Copyright (C) 2018 the original author or authors.
+ *
+ * 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 org.springframework.cloud.alibaba.sentinel.endpoint;
 
+import com.alibaba.csp.sentinel.datasource.AbstractDataSource;
 import com.alibaba.csp.sentinel.heartbeat.HeartbeatSenderProvider;
 import com.alibaba.csp.sentinel.transport.HeartbeatSender;
 import com.alibaba.csp.sentinel.transport.config.TransportConfig;
+import org.springframework.beans.factory.support.DefaultListableBeanFactory;
 import org.springframework.boot.actuate.health.AbstractHealthIndicator;
 import org.springframework.boot.actuate.health.Health;
 import org.springframework.boot.actuate.health.HealthIndicator;
@@ -14,21 +32,36 @@ import java.util.HashMap;
 import java.util.Map;
 
 /**
- * {@link HealthIndicator} for Sentinel.
+ * A {@link HealthIndicator} for Sentinel, which checks the status of
+ * Sentinel Dashboard and DataSource.
+ *
  * <p>
  * Check the status of Sentinel Dashboard by sending a heartbeat message to it.
+ * If no Exception thrown, it's OK.
+ *
+ * Check the status of Sentinel DataSource by calling loadConfig method of {@link AbstractDataSource}.
+ * If return true, it's OK.
  *
- * Note: if sentinel isn't enabled or sentinel-dashboard isn't configured,
+ * If Dashboard and DataSource are both OK, the health status is UP.
- * the health status is up and more infos are provided in detail.
+ *</p>
+ *
+ * <p>
+ * Note:
+ * If Sentinel isn't enabled, the health status is up.
+ * If Sentinel Dashboard isn't configured, it's OK and mark the status of Dashboard with UNKNOWN.
+ * More informations are provided in details.
  * </p>
  *
  * @author cdfive
  */
 public class SentinelHealthIndicator extends AbstractHealthIndicator {
 
+    private DefaultListableBeanFactory beanFactory;
+
     private SentinelProperties sentinelProperties;
 
-    public SentinelHealthIndicator(SentinelProperties sentinelProperties) {
+    public SentinelHealthIndicator(DefaultListableBeanFactory beanFactory, SentinelProperties sentinelProperties) {
+        this.beanFactory = beanFactory;
         this.sentinelProperties = sentinelProperties;
     }
 
@@ -45,22 +78,49 @@ public class SentinelHealthIndicator extends AbstractHealthIndicator {
 
         detailMap.put("enabled", true);
 
+        // Check health of Dashboard
+        boolean dashboardUp = true;
         String consoleServer = TransportConfig.getConsoleServer();
-        // If dashboard isn't configured, set the status to UNKNOWN
         if (StringUtils.isEmpty(consoleServer)) {
+            // If Dashboard isn't configured, mark the status of Dashboard with UNKNOWN and the dashboardUp is still true
             detailMap.put("dashboard", new Status(Status.UNKNOWN.getCode(), "dashboard isn't configured"));
-            builder.up().withDetails(detailMap);
+        } else {
-            return;
+            // If Dashboard is configured, send a heartbeat message to it and check the result
-        }
-
-        // If dashboard is configured, send a heartbeat message to it and check the result
             HeartbeatSender heartbeatSender = HeartbeatSenderProvider.getHeartbeatSender();
             boolean result = heartbeatSender.sendHeartbeat();
             if (result) {
                 detailMap.put("dashboard", Status.UP);
-            builder.up().withDetails(detailMap);
             } else {
+                // If failed to send heartbeat message, means that the Dashboard is DOWN
+                dashboardUp = false;
                 detailMap.put("dashboard", new Status(Status.DOWN.getCode(), consoleServer + " can't be connected"));
+            }
+        }
+
+        // Check health of DataSource
+        boolean dataSourceUp = true;
+        Map<String, Object> dataSourceDetailMap = new HashMap<>();
+        detailMap.put("dataSource", dataSourceDetailMap);
+
+        // Get all DataSources and each call loadConfig to check if it's OK
+        Map<String, AbstractDataSource> dataSourceMap = beanFactory.getBeansOfType(AbstractDataSource.class);
+        for (Map.Entry<String, AbstractDataSource> dataSourceMapEntry : dataSourceMap.entrySet()) {
+            String dataSourceBeanName = dataSourceMapEntry.getKey();
+            AbstractDataSource dataSource = dataSourceMapEntry.getValue();
+            try {
+                dataSource.loadConfig();
+                dataSourceDetailMap.put(dataSourceBeanName, Status.UP);
+            } catch (Exception e) {
+                // If one DataSource failed to loadConfig, means that the DataSource is DOWN
+                dataSourceUp = false;
+                dataSourceDetailMap.put(dataSourceBeanName, new Status(Status.DOWN.getCode(), e.getMessage()));
+            }
+        }
+
+        // If Dashboard and DataSource are both OK, the health status is UP
+        if (dashboardUp && dataSourceUp) {
+            builder.up().withDetails(detailMap);
+        } else {
             builder.down().withDetails(detailMap);
         }
     }

spring-cloud-alibaba-sentinel/src/main/resources/META-INF/additional-spring-configuration-metadata.json

@@ -88,6 +88,12 @@
       "type": "java.lang.String",
       "defaultValue": "3",
       "description": "sentinel the cold factor."
+    },
+    {
+      "name": "management.health.sentinel.enabled",
+      "type": "java.lang.Boolean",
+      "description": "Whether to enable sentinel health check.",
+      "defaultValue": true
     }
   ]
 }

spring-cloud-alibaba-sentinel/src/test/java/org/springframework/cloud/alibaba/sentinel/endpoint/SentinelHealthIndicatorTests.java

@@ -1,17 +1,38 @@
+/*
+ * Copyright (C) 2018 the original author or authors.
+ *
+ * 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 org.springframework.cloud.alibaba.sentinel.endpoint;
 
 import com.alibaba.csp.sentinel.config.SentinelConfig;
+import com.alibaba.csp.sentinel.datasource.AbstractDataSource;
+import com.alibaba.csp.sentinel.datasource.FileRefreshableDataSource;
 import com.alibaba.csp.sentinel.heartbeat.HeartbeatSenderProvider;
 import com.alibaba.csp.sentinel.transport.HeartbeatSender;
 import com.alibaba.csp.sentinel.transport.config.TransportConfig;
 import org.junit.Before;
 import org.junit.Test;
+import org.springframework.beans.factory.support.DefaultListableBeanFactory;
 import org.springframework.boot.actuate.health.Health;
 import org.springframework.boot.actuate.health.Status;
 import org.springframework.cloud.alibaba.sentinel.SentinelProperties;
 import org.springframework.util.ReflectionUtils;
 
 import java.lang.reflect.Field;
+import java.util.HashMap;
+import java.util.Map;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.mockito.Mockito.mock;
@@ -26,14 +47,17 @@ public class SentinelHealthIndicatorTests {
 
     private SentinelHealthIndicator sentinelHealthIndicator;
 
+    private DefaultListableBeanFactory beanFactory;
+
     private SentinelProperties sentinelProperties;
 
     private HeartbeatSender heartbeatSender;
 
     @Before
     public void setUp() {
+        beanFactory = mock(DefaultListableBeanFactory.class);
         sentinelProperties = mock(SentinelProperties.class);
-        sentinelHealthIndicator = new SentinelHealthIndicator(sentinelProperties);
+        sentinelHealthIndicator = new SentinelHealthIndicator(beanFactory, sentinelProperties);
 
         SentinelConfig.setConfig(TransportConfig.CONSOLE_SERVER, "");
 
@@ -64,19 +88,18 @@ public class SentinelHealthIndicatorTests {
     }
 
     @Test
-    public void testSentinelDashboardConfiguredCheckSuccess() throws Exception {
+    public void testSentinelDashboardConfiguredSuccess() throws Exception {
         when(sentinelProperties.isEnabled()).thenReturn(true);
         SentinelConfig.setConfig(TransportConfig.CONSOLE_SERVER, "localhost:8080");
         when(heartbeatSender.sendHeartbeat()).thenReturn(true);
 
-
         Health health = sentinelHealthIndicator.health();
 
         assertThat(health.getStatus()).isEqualTo(Status.UP);
     }
 
     @Test
-    public void testSentinelDashboardConfiguredCheckFailed() throws Exception {
+    public void testSentinelDashboardConfiguredFailed() throws Exception {
         when(sentinelProperties.isEnabled()).thenReturn(true);
         SentinelConfig.setConfig(TransportConfig.CONSOLE_SERVER, "localhost:8080");
         when(heartbeatSender.sendHeartbeat()).thenReturn(false);
@@ -87,4 +110,53 @@ public class SentinelHealthIndicatorTests {
         assertThat(health.getStatus()).isEqualTo(Status.DOWN);
         assertThat(health.getDetails().get("dashboard")).isEqualTo(new Status(Status.DOWN.getCode(), "localhost:8080 can't be connected"));
     }
+
+    @Test
+    public void testSentinelDataSourceSuccess() throws Exception {
+        when(sentinelProperties.isEnabled()).thenReturn(true);
+        SentinelConfig.setConfig(TransportConfig.CONSOLE_SERVER, "localhost:8080");
+        when(heartbeatSender.sendHeartbeat()).thenReturn(true);
+
+        Map<String, AbstractDataSource> dataSourceMap = new HashMap<>();
+
+        FileRefreshableDataSource fileDataSource1 = mock(FileRefreshableDataSource.class);
+        dataSourceMap.put("ds1-sentinel-file-datasource", fileDataSource1);
+
+        FileRefreshableDataSource fileDataSource2 = mock(FileRefreshableDataSource.class);
+        dataSourceMap.put("ds2-sentinel-file-datasource", fileDataSource2);
+
+        when(beanFactory.getBeansOfType(AbstractDataSource.class)).thenReturn(dataSourceMap);
+
+        Health health = sentinelHealthIndicator.health();
+
+        assertThat(health.getStatus()).isEqualTo(Status.UP);
+        Map<String, Status> dataSourceDetailMap = (Map<String, Status>) health.getDetails().get("dataSource");
+        assertThat(dataSourceDetailMap.get("ds1-sentinel-file-datasource")).isEqualTo(Status.UP);
+        assertThat(dataSourceDetailMap.get("ds2-sentinel-file-datasource")).isEqualTo(Status.UP);
+    }
+
+    @Test
+    public void testSentinelDataSourceFailed() throws Exception {
+        when(sentinelProperties.isEnabled()).thenReturn(true);
+        SentinelConfig.setConfig(TransportConfig.CONSOLE_SERVER, "localhost:8080");
+        when(heartbeatSender.sendHeartbeat()).thenReturn(true);
+
+        Map<String, AbstractDataSource> dataSourceMap = new HashMap<>();
+
+        FileRefreshableDataSource fileDataSource1 = mock(FileRefreshableDataSource.class);
+        dataSourceMap.put("ds1-sentinel-file-datasource", fileDataSource1);
+
+        FileRefreshableDataSource fileDataSource2 = mock(FileRefreshableDataSource.class);
+        when(fileDataSource2.loadConfig()).thenThrow(new RuntimeException("fileDataSource2 error"));
+        dataSourceMap.put("ds2-sentinel-file-datasource", fileDataSource2);
+
+        when(beanFactory.getBeansOfType(AbstractDataSource.class)).thenReturn(dataSourceMap);
+
+        Health health = sentinelHealthIndicator.health();
+
+        assertThat(health.getStatus()).isEqualTo(Status.DOWN);
+        Map<String, Status> dataSourceDetailMap = (Map<String, Status>) health.getDetails().get("dataSource");
+        assertThat(dataSourceDetailMap.get("ds1-sentinel-file-datasource")).isEqualTo(Status.UP);
+        assertThat(dataSourceDetailMap.get("ds2-sentinel-file-datasource")).isEqualTo(new Status(Status.DOWN.getCode(), "fileDataSource2 error"));
+    }
 }