启动Nacos报错：Caused by: java.lang.IllegalStateException: No DataSource set

问题描述：

Linux环境下启动nacos不成功，查看日志报错：Caused by: java.lang.IllegalStateException: No DataSource set

Caused by: com.alibaba.nacos.api.exception.NacosException: Nacos Server did not start because dumpservice bean construction failure :
No DataSource set
        at com.alibaba.nacos.config.server.service.dump.DumpService.dumpOperate(DumpService.java:260)
        at com.alibaba.nacos.config.server.service.dump.ExternalDumpService.init(ExternalDumpService.java:61)
        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.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:389)
        at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeInitMethods(InitDestroyAnnotationBeanPostProcessor.java:333)
        at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:157)
        ... 54 common frames omitted
Caused by: java.lang.IllegalStateException: No DataSource set
        at org.springframework.util.Assert.state(Assert.java:76)
        at org.springframework.jdbc.support.JdbcAccessor.obtainDataSource(JdbcAccessor.java:86)
        at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:376)
        at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:465)
        at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:475)
        at org.springframework.jdbc.core.JdbcTemplate.queryForObject(JdbcTemplate.java:508)
        at org.springframework.jdbc.core.JdbcTemplate.queryForObject(JdbcTemplate.java:515)
        at com.alibaba.nacos.config.server.service.repository.extrnal.ExternalConfigInfoPersistServiceImpl.findConfigMaxId(ExternalConfigInfoPersistServiceImpl.java:616)
        at com.alibaba.nacos.config.server.service.dump.processor.DumpAllProcessor.process(DumpAllProcessor.java:51)
        at com.alibaba.nacos.config.server.service.dump.DumpService.dumpConfigInfo(DumpService.java:317)
        at com.alibaba.nacos.config.server.service.dump.DumpService.dumpOperate(DumpService.java:230)

检查数据库mysql服务正常，已经提前初始化nacos相关配置表：mysql-schema.sql

以为是数据库url配置错误，检查了很多遍都没有问题。

db.url.0=jdbc:mysql://192.168.239.130:3306/nacos?characterEncoding=utf8&connectTimeout=1000&socketTimeout=3000&autoReconnect=true&useUnicode=true&useSSL=false&serverTimezone=UTC

再看数据库版本是8.0.30，所以8.0以上版本所以要加上这个:allowPublicKeyRetrieval=true

让数据库自动生成相关配置表。

正确配置如下：

db.url.0=jdbc:mysql://192.168.239.130:3306/nacos?characterEncoding=utf8&connectTimeout=1000&socketTimeout=3000&autoReconnect=true&useUnicode=true&useSSL=false&serverTimezone=UTC&allowPublicKeyRetrieval=true