Description
Issue Description
Type: feature request
Describe what happened (or what feature you want)
我们准备将已有系统中的服务注册到Nacos，但是配置中心还是使用Apollo；
We are going to register the services in the existing system to Nacos, but the configuration center still uses Apollo;
但是在部署时遇到问题，Naocs不能很好的支持在K8S中进行集群部署和动态伸缩，因为目前官方提供的方案为有状态的集群，而且部署非常复杂。
However, when deploying, there are many problems, Naocs can't support cluster deployment and dynamic scaling in K8S because the official solution is a stateful cluster and the deployment is very complicated.
我们需要Nacos的注册中心能力可以单独发布出来，以支持在Docker环境下的无状态集群部署。
We need Nacos' registry capabilities to be released separately to support stateless cluster deployment in Docker environments.
Describe what you expected to happen
我们需要只提供注册中心能力的Nacos版本，不依赖MySQL数据库，几点无状态运行，集群中的节点可以任意伸缩。
We need a version of Nacos that only provides the ability of the registry. It does not depend on the MySQL database. When it runs stateless, the nodes in the cluster can be arbitrarily scaled.