增加服务实例自身健康检查

spring-cloud-tencent-examples/polaris-discovery-example/discovery-callee-service/src/main/resources/bootstrap.yml

@@ -1,6 +1,6 @@
 server:
   session-timeout: 1800
-  port: 48081
+  port: 48084
 spring:
   application:
     name: DiscoveryCalleeService

spring-cloud-tencent-examples/polaris-discovery-example/discovery-caller-service/src/main/java/com/tencent/cloud/polaris/discovery/service/caller/DiscoveryCallerController.java

@@ -59,4 +59,14 @@ public class DiscoveryCallerController {
         return restTemplate.getForObject("http://DiscoveryCalleeService/discovery/service/callee/info", String.class);
     }
 
+
+    /**
+     * health check
+     *
+     * @return 信息
+     */
+    @GetMapping("/healthCheck")
+    public String healthCheck() {
+        return "pk ok";
+    }
 }

spring-cloud-tencent-examples/polaris-discovery-example/discovery-caller-service/src/main/resources/bootstrap.yml

@@ -7,6 +7,10 @@ spring:
   cloud:
     polaris:
       address: grpc://127.0.0.1:8091
+      discovery:
+        heartbeat:
+          enabled: true
+        health-check-url: http://localhost:48080/discovery/service/caller/healthCheck
     consul:
       port: 8500
       host: 127.0.0.1

spring-cloud-tencent-starters/spring-cloud-starter-tencent-polaris-discovery/src/main/java/com/tencent/cloud/polaris/PolarisProperties.java

@@ -98,6 +98,12 @@ public class PolarisProperties {
     @Value("${spring.cloud.polaris.discovery.heartbeat.enabled:#{false}}")
     private Boolean heartbeatEnabled = true;
 
+    /**
+     * Custom health check url to override default
+     */
+    @Value("${spring.cloud.polaris.discovery.health-check-url:}")
+    private String healthCheckUrl;
+
     @Autowired
     private Environment environment;
 
@@ -212,6 +218,14 @@ public class PolarisProperties {
         this.port = port;
     }
 
+    public String getHealthCheckUrl() {
+        return healthCheckUrl;
+    }
+
+    public void setHealthCheckUrl(String healthCheckUrl) {
+        this.healthCheckUrl = healthCheckUrl;
+    }
+
     @Override
     @SuppressWarnings("checkstyle:all")
     public String toString() {
@@ -227,6 +241,7 @@ public class PolarisProperties {
                 ", policy='" + policy + '\'' +
                 ", registerEnabled=" + registerEnabled +
                 ", heartbeatEnabled=" + heartbeatEnabled +
+                ", healthCheckUrl=" + healthCheckUrl +
                 ", environment=" + environment +
                 '}';
     }

spring-cloud-tencent-starters/spring-cloud-starter-tencent-polaris-discovery/src/main/java/com/tencent/cloud/polaris/registry/PolarisServiceRegistry.java

@@ -21,6 +21,7 @@ import static org.springframework.util.ReflectionUtils.rethrowRuntimeException;
 
 import com.tencent.cloud.metadata.config.MetadataLocalProperties;
 import com.tencent.cloud.polaris.PolarisProperties;
+import com.tencent.cloud.polaris.util.OkHttpUtil;
 import com.tencent.polaris.api.core.ProviderAPI;
 import com.tencent.polaris.api.exception.PolarisException;
 import com.tencent.polaris.api.pojo.Instance;
@@ -33,6 +34,7 @@ import com.tencent.cloud.polaris.discovery.PolarisDiscoveryHandler;
 import java.util.concurrent.ScheduledExecutorService;
 import java.util.concurrent.ScheduledThreadPoolExecutor;
 import java.util.concurrent.TimeUnit;
+import org.apache.logging.log4j.util.Strings;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.BeanUtils;
@@ -179,6 +181,12 @@ public class PolarisServiceRegistry implements ServiceRegistry<Registration> {
             @Override
             public void run() {
                 try {
+                    String healthCheckUrl = polarisProperties.getHealthCheckUrl();
+                    //先判断是否配置了health-check-url，如果配置了，需要先进行服务实例健康检查，如果健康检查通过，则进行心跳上报，如果不通过，则不上报心跳
+                    if (Strings.isNotEmpty(healthCheckUrl) && !OkHttpUtil.get(healthCheckUrl, null)){
+                        log.error("polaris health check failed");
+                        return;
+                    }
                     polarisDiscoveryHandler.getProviderAPI().heartbeat(heartbeatRequest);
                 } catch (PolarisException e) {
                     log.error("polaris heartbeat[{}]", e.getCode(), e);

spring-cloud-tencent-starters/spring-cloud-starter-tencent-polaris-discovery/src/main/java/com/tencent/cloud/polaris/util/OkHttpUtil.java

@@ -0,0 +1,83 @@
+/*
+ * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
+ *
+ * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
+ *
+ * Licensed under the BSD 3-Clause License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ *
+ * 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.tencent.cloud.polaris.util;
+
+import com.squareup.okhttp.MediaType;
+import com.squareup.okhttp.Request;
+import com.squareup.okhttp.Response;
+import com.squareup.okhttp.OkHttpClient;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import java.util.Map;
+import java.util.Objects;
+/**
+ * okhttp util.
+ *
+ * @author kan peng
+ */
+public class OkHttpUtil {
+    public final static Logger logger = LoggerFactory.getLogger(OkHttpUtil.class);
+    /**
+     * JSON format
+     */
+    public static final MediaType MEDIA_TYPE_JSON = MediaType.parse("application/json; charset=utf-8");
+    /**
+     * client
+     */
+    private final static OkHttpClient HTTP_CLIENT = new OkHttpClient();
+
+    /**
+     * get request.
+     *
+     * @param url     url
+     * @param headers headers
+     * @return response
+     */
+    public static boolean get(String url, Map<String, String> headers) {
+        try {
+            Request.Builder builder = new Request.Builder();
+            buildHeader(builder, headers);
+            Request request = builder.url(url).build();
+            Response response = HTTP_CLIENT.newCall(request).execute();
+
+            if (response.isSuccessful() && Objects.nonNull(response.body())) {
+                String result = response.body().string();
+                logger.info("exec get request, url: {} success，response data: {}", url, result);
+                return true;
+            }
+        } catch (Exception e) {
+            logger.error("exec get request，url: {} failed!", url, e);
+        }
+        return false;
+    }
+
+    /**
+     * build header.
+     *
+     * @param builder builder
+     * @param headers headers
+     */
+    private static void buildHeader(Request.Builder builder, Map<String, String> headers) {
+        if (Objects.nonNull(headers) && headers.size() > 0) {
+            headers.forEach((k, v) -> {
+                if (Objects.nonNull(k) && Objects.nonNull(v)) {
+                    builder.addHeader(k, v);
+                }
+            });
+        }
+    }
+}

spring-cloud-tencent-starters/spring-cloud-starter-tencent-polaris-discovery/src/main/resources/META-INF/additional-spring-configuration-metadata.json

@@ -18,6 +18,12 @@
       "defaultValue": true,
       "description": "enable polaris discovery or not."
     },
+    {
+      "name": "spring.cloud.polaris.discovery.health-check-url",
+      "type": "java.lang.String",
+      "defaultValue": "",
+      "description": "heal check url."
+    },
     {
       "name": "spring.cloud.polaris.discovery.instance-enabled",
       "type": "java.lang.Boolean",