support Nacos cluster

apm-dist/release-docs/NOTICE

@@ -831,3 +831,61 @@ from and not be held liable to the user for any such damages as noted
 above as far as the program is concerned.
 
 ------
+
+===========================================================================
+nacos-1.0.0 Notice
+===========================================================================
+Nacos
+Copyright 2018-2019 The Apache Software Foundation
+
+This product includes software developed at
+The Alibaba MiddleWare Group.
+
+------
+This product has a bundle Spring Boot:
+                            The Spring Boot Project
+                            =================
+
+Please visit the Spring Boot web site for more information:
+
+  * https://spring.io/projects/spring-boot
+
+Copyright 2014 The Spring Boot Project
+
+The Spring Boot Project licenses this file to you 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.
+
+Also, please refer to each LICENSE.<component>.txt file, which is located in
+the 'license' directory of the distribution file, for the license terms of the
+components that this product depends on.
+
+------
+
+===========================================================================
+fastjson-1.2.47 Notice
+===========================================================================
+
+/*
+ * Copyright 1999-2017 Alibaba Group.
+ *
+ * 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.
+ */

apm-dist/release-docs/licenses/LICENSE-fastjson.txt

@@ -0,0 +1,13 @@
+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
+
+     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.

apm-dist/release-docs/licenses/LICENSE-nacos.txt

@@ -0,0 +1,201 @@
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docker/config/application.yml

@@ -33,6 +33,9 @@ cluster:
 #    serviceName: ${SW_SERVICE_NAME:"SkyWalking_OAP_Cluster"}
 #     Consul cluster nodes, example: 10.0.0.1:8500,10.0.0.2:8500,10.0.0.3:8500
 #    hostPort: ${SW_CLUSTER_CONSUL_HOST_PORT:localhost:8500}
+#  nacos:
+#    serviceName: ${SW_SERVICE_NAME:"SkyWalking_OAP_Cluster"}
+#    hostPort: ${SW_CLUSTER_NACOS_HOST_PORT:localhost:8848}
 core:
   default:
     # Mixed: Receive agent data, Level 1 aggregate, Level 2 aggregate

docs/en/setup/backend/backend-cluster.md

@@ -73,6 +73,18 @@ cluster:
     hostPort: ${SW_CLUSTER_CONSUL_HOST_PORT:localhost:8500}
 ```
 
+## Nacos
+Set the **cluster** module's implementor to **nacos** in 
+the yml to active. 
+
+```yaml
+cluster:
+  nacos:
+    serviceName: ${SW_SERVICE_NAME:"SkyWalking_OAP_Cluster"}
+    # Nacos cluster nodes, example: 10.0.0.1:8848,10.0.0.2:8848,10.0.0.3:8848
+    hostPort: ${SW_CLUSTER_NACOS_HOST_PORT:localhost:8848}
+```
+
 Same as Zookeeper coordinator,
 in some cases, oap default gRPC host and port in core are not suitable for internal communication among the oap nodes.
 The following setting are provided to set the hot and port manually, based on your own LAN env.

oap-server/server-cluster-plugin/cluster-nacos-plugin/pom.xml

@@ -0,0 +1,71 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ Licensed to the Apache Software Foundation (ASF) under one or more
+  ~ contributor license agreements.  See the NOTICE file distributed with
+  ~ this work for additional information regarding copyright ownership.
+  ~ The ASF licenses this file to You 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.
+  ~
+  -->
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <parent>
+        <artifactId>server-cluster-plugin</artifactId>
+        <groupId>org.apache.skywalking</groupId>
+        <version>6.2.0-SNAPSHOT</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>cluster-nacos-plugin</artifactId>
+    <properties>
+        <nacos.version>1.0.0</nacos.version>
+    </properties>
+    <dependencies>
+        <dependency>
+            <groupId>org.apache.skywalking</groupId>
+            <artifactId>server-core</artifactId>
+            <version>${project.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.alibaba.nacos</groupId>
+            <artifactId>nacos-client</artifactId>
+            <version>${nacos.version}</version>
+            <exclusions>
+                <exclusion>
+                    <groupId>org.slf4j</groupId>
+                    <artifactId>slf4j-api</artifactId>
+                </exclusion>
+                <exclusion>
+                    <groupId>org.apache.logging.log4j</groupId>
+                    <artifactId>log4j-core</artifactId>
+                </exclusion>
+                <exclusion>
+                    <groupId>org.apache.logging.log4j</groupId>
+                    <artifactId>log4j-slf4j-impl</artifactId>
+                </exclusion>
+                <exclusion>
+                    <groupId>ch.qos.logback</groupId>
+                    <artifactId>logback-classic</artifactId>
+                </exclusion>
+                <exclusion>
+                    <groupId>ch.qos.logback</groupId>
+                    <artifactId>logback-core</artifactId>
+                </exclusion>
+                <exclusion>
+                    <groupId>net.jcip</groupId>
+                    <artifactId>jcip-annotations</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+    </dependencies>
+</project>