再使用nacos-server 2.0.1版本进行部署时，docker镜像启动后就报了下面的异常信息：
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'communicationController' defined in URL [jar:file:/usr/local/nacos/target/nacos-server.jar!/BOOT-INF/lib/nacos-config-2.0.1.jar!/com/alibaba/nacos/config/server/controller/CommunicationController.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dumpService': Invocation of init method failed; nested exception is java.lang.RuntimeException: Nacos Server did not start because dumpservice bean construction failure : No DataSource set at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:769) at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:218) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1308) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1154) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:538) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:498) at org.springframework.beans.factory.support.AbstractBeanFactory.lambdadoGetBean0(AbstractBeanFactory.java:320) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:846) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:863) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:546) at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:142) at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775) at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) at org.springframework.boot.SpringApplication.run(SpringApplication.java:316) at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260) at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248) at com.alibaba.nacos.Nacos.main(Nacos.java:33) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:48) at org.springframework.boot.loader.Launcher.launch(Launcher.java:87) at org.springframework.boot.loader.Launcher.launch(Launcher.java:50) at org.springframework.boot.loader.PropertiesLauncher.main(PropertiesLauncher.java:593) Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dumpService': Invocation of init method failed; nested exception is java.lang.RuntimeException: Nacos Server did not start because dumpservice bean construction failure : No DataSource set
网上查了很多资料都没有解决，错就处在nacos给出的异常信息的迷惑性，笔者出现这个问题因为nacos-server连接外部的mysql服务器失败导致的，也就是说出现这个问题的根源在于DataSource数据源创建失败了，之所以访问不到外部的mysql服务，是因为docker容器的ip地址与mysql服务器ip地址网段冲突导致的，通过人为设置network网段的方式解决了这个问题。
PS：
需要注意的是nacos-server docker镜像内部的mysql配置如下所示：
#db.num=${MYSQL_DATABASE_NUM:1}
#db.url.0=jdbc:mysql://${MYSQL_SERVICE_HOST}:${MYSQL_SERVICE_PORT:3306}/${MYSQL_SERVICE_DB_NAME}?${MYSQL_SERVICE_DB_PARAM:characterEncoding=utf8&connectTimeout=1000&socketTimeout=3000&autoReconnect=true}
#db.url.1=jdbc:mysql://${MYSQL_SERVICE_HOST}:${MYSQL_SERVICE_PORT:3306}/${MYSQL_SERVICE_DB_NAME}?${MYSQL_SERVICE_DB_PARAM:characterEncoding=utf8&connectTimeout=1000&socketTimeout=3000&autoReconnect=true}
#db.user=${MYSQL_SERVICE_USER}
#db.password=${MYSQL_SERVICE_PASSWORD}
所以如果mysql服务器是MySQL8.0版本的话需要设置MYSQL_SERVICE_DB_PARAM需要指定serverTimezone,比如
代码语言：javascript复制serverTimezone=Asia/Shanghai完整的MYSQL_SERVICE_DB_PARAM配置如下所示：
characterEncoding=utf8&connectTimeout=1000&socketTimeout=3000&autoReconnect=true&useUnicode=true&useSSL=false&serverTimezone=Asia/Shanghai
