Merge pull request #22 from alibaba/master

update

spring-cloud-alibaba-examples/nacos-example/nacos-discovery-example/nacos-discovery-provider-example/src/main/resources/application.properties

@@ -1,6 +1,7 @@
 server.port=18082
 spring.application.name=service-provider
 spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848
+#spring.cloud.nacos.discovery.instance-enabled=true
 
 spring.cloud.nacos.username=nacos
 spring.cloud.nacos.password=nacos

spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-discovery/src/main/java/com/alibaba/cloud/nacos/NacosDiscoveryProperties.java

@@ -199,6 +199,11 @@ public class NacosDiscoveryProperties {
 	 */
 	private Integer ipDeleteTimeout;
 
+	/**
+	 * If instance is enabled to accept request. The default value is true.
+	 */
+	private boolean instanceEnabled = true;
+
 	@Autowired
 	private InetUtils inetUtils;
 
@@ -448,6 +453,14 @@ public class NacosDiscoveryProperties {
 		this.password = password;
 	}
 
+	public boolean isInstanceEnabled() {
+		return instanceEnabled;
+	}
+
+	public void setInstanceEnabled(boolean instanceEnabled) {
+		this.instanceEnabled = instanceEnabled;
+	}
+
 	@Override
 	public String toString() {
 		return "NacosDiscoveryProperties{" + "serverAddr='" + serverAddr + '\''

spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-discovery/src/main/java/com/alibaba/cloud/nacos/registry/NacosServiceRegistry.java

@@ -159,6 +159,7 @@ public class NacosServiceRegistry implements ServiceRegistry<Registration> {
 		instance.setPort(registration.getPort());
 		instance.setWeight(nacosDiscoveryProperties.getWeight());
 		instance.setClusterName(nacosDiscoveryProperties.getClusterName());
+		instance.setEnabled(nacosDiscoveryProperties.isInstanceEnabled());
 		instance.setMetadata(registration.getMetadata());
 
 		return instance;

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

@@ -23,6 +23,12 @@
       "defaultValue": true,
       "description": "enable nacos discovery or not."
     },
+    {
+      "name": "spring.cloud.nacos.discovery.instance-enabled",
+      "type": "java.lang.Boolean",
+      "defaultValue": true,
+      "description": "If instance is enabled to accept request. The default value is true."
+    },
     {
       "name": "spring.cloud.nacos.discovery.namingLoadCacheAtStart",
       "type": "java.lang.Boolean",