support nacos discovery group

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

@@ -104,10 +104,15 @@ public class NacosDiscoveryProperties {
 	private float weight = 1;
 
 	/**
-	 * cluster name for nacos server.
+	 * cluster name for nacos .
 	 */
 	private String clusterName = "DEFAULT";
 
+	/**
+	 * group name for nacos
+	 */
+	private String group = "DEFAULT";
+
 	/**
 	 * naming load from local cache at application start. true is load.
 	 */
@@ -395,18 +400,28 @@ public class NacosDiscoveryProperties {
 		this.watchDelay = watchDelay;
 	}
 
+	public String getGroup() {
+		return group;
+	}
+
+	public void setGroup(String group) {
+		this.group = group;
+	}
+
 	@Override
 	public String toString() {
 		return "NacosDiscoveryProperties{" + "serverAddr='" + serverAddr + '\''
 				+ ", endpoint='" + endpoint + '\'' + ", namespace='" + namespace + '\''
 				+ ", watchDelay=" + watchDelay + ", logName='" + logName + '\''
 				+ ", service='" + service + '\'' + ", weight=" + weight
-				+ ", clusterName='" + clusterName + '\'' + ", namingLoadCacheAtStart='"
-				+ namingLoadCacheAtStart + '\'' + ", metadata=" + metadata
-				+ ", registerEnabled=" + registerEnabled + ", ip='" + ip + '\''
-				+ ", networkInterface='" + networkInterface + '\'' + ", port=" + port
-				+ ", secure=" + secure + ", accessKey='" + accessKey + '\''
-				+ ", secretKey='" + secretKey + '\'' + '}';
+				+ ", clusterName='" + clusterName + '\'' + ", group='" + group + '\''
+				+ ", namingLoadCacheAtStart='" + namingLoadCacheAtStart + '\''
+				+ ", metadata=" + metadata + ", registerEnabled=" + registerEnabled
+				+ ", ip='" + ip + '\'' + ", networkInterface='" + networkInterface + '\''
+				+ ", port=" + port + ", secure=" + secure + ", accessKey='" + accessKey
+				+ '\'' + ", secretKey='" + secretKey + '\'' + ", heartBeatInterval="
+				+ heartBeatInterval + ", heartBeatTimeout=" + heartBeatTimeout
+				+ ", ipDeleteTimeout=" + ipDeleteTimeout + '}';
 	}
 
 	public void overrideFromEnv(Environment env) {
@@ -442,6 +457,10 @@ public class NacosDiscoveryProperties {
 			this.setEndpoint(
 					env.resolvePlaceholders("${spring.cloud.nacos.discovery.endpoint:}"));
 		}
+		if (StringUtils.isEmpty(this.getGroup())) {
+			this.setGroup(
+				env.resolvePlaceholders("${spring.cloud.nacos.discovery.group:}"));
+		}
 	}
 
 	public NamingService namingServiceInstance() {

spring-cloud-alibaba-nacos-discovery/src/main/java/com/alibaba/cloud/nacos/discovery/NacosDiscoveryClient.java

@@ -54,8 +54,9 @@ public class NacosDiscoveryClient implements DiscoveryClient {
     @Override
     public List<ServiceInstance> getInstances(String serviceId) {
         try {
+            String group = discoveryProperties.getGroup();
             List<Instance> instances = discoveryProperties.namingServiceInstance()
-                    .selectInstances(serviceId, true);
+                    .selectInstances(serviceId, group, true);
             return hostToServiceInstanceList(instances, serviceId);
         } catch (Exception e) {
             throw new RuntimeException(

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

@@ -54,11 +54,12 @@ public class NacosServiceRegistry implements ServiceRegistry<Registration> {
 		}
 
 		String serviceId = registration.getServiceId();
+		String group = nacosDiscoveryProperties.getGroup();
 
 		Instance instance = getNacosInstanceFromRegistration(registration);
 
 		try {
-			namingService.registerInstance(serviceId, instance);
+			namingService.registerInstance(serviceId, group, instance);
 			log.info("nacos registry, {} {}:{} register finished", serviceId,
 					instance.getIp(), instance.getPort());
 		}
@@ -80,9 +81,10 @@ public class NacosServiceRegistry implements ServiceRegistry<Registration> {
 
 		NamingService namingService = nacosDiscoveryProperties.namingServiceInstance();
 		String serviceId = registration.getServiceId();
+		String group = nacosDiscoveryProperties.getGroup();
 
 		try {
-			namingService.deregisterInstance(serviceId, registration.getHost(),
+			namingService.deregisterInstance(serviceId, group, registration.getHost(),
 					registration.getPort(), nacosDiscoveryProperties.getClusterName());
 		}
 		catch (Exception e) {
@@ -153,6 +155,7 @@ public class NacosServiceRegistry implements ServiceRegistry<Registration> {
 		instance.setWeight(nacosDiscoveryProperties.getWeight());
 		instance.setClusterName(nacosDiscoveryProperties.getClusterName());
 		instance.setMetadata(registration.getMetadata());
+
 		return instance;
 	}
 

spring-cloud-alibaba-nacos-discovery/src/main/java/com/alibaba/cloud/nacos/ribbon/NacosServerList.java

@@ -52,8 +52,9 @@ public class NacosServerList extends AbstractServerList<NacosServer> {
 
 	private List<NacosServer> getServers() {
 		try {
+			String group = discoveryProperties.getGroup();
 			List<Instance> instances = discoveryProperties.namingServiceInstance()
-					.selectInstances(serviceId, true);
+					.selectInstances(serviceId, group,true);
 			return instancesToServerList(instances);
 		}
 		catch (Exception e) {