项目场景：

在配置Eureka时，启动Eureka时，报错Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured.，启动不了，Eureka配置博客：【SpringCloud】服务注册中心Eureka

问题描述：

报错：Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured.

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2021-01-23 11:57:02.758 ERROR 276 --- [           main] o.s.b.d.LoggingFailureAnalysisReporter   : 

***************************
APPLICATION FAILED TO START
***************************

Description:
# 配置数据源失败：未指定“url”属性，无法配置嵌入的数据源。
Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured.
# 未能确定合适的驱动程序类别
Reason: Failed to determine a suitable driver class


Action:

Consider the following:
	If you want an embedded database (H2, HSQL or Derby), please put it on the classpath.
	If you have database settings to be loaded from a particular profile you may need to activate it (no profiles are currently active).


Process finished with exit code 1

解决方案：

在SpringBoot启动类注解@SpringBootApplication后加上exclude = DataSourceAutoConfiguration.class，表示启动时不启用 DataSource的自动配置检查

// exclude ：启动时不启用 DataSource的自动配置检查
@SpringBootApplication(exclude = DataSourceAutoConfiguration.class)
@EnableEurekaServer   // 表示它是服务注册中心
public class EurekaServerMain7001 {
 public static void main(String[] args){
     SpringApplication.run(EurekaServerMain7001.class, args);
 }
}

最后

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