报错相关信息：
2019-07-22 17:12:48.971 ERROR 8312 --- [ main] o.s.b.d.LoggingFailureAnalysisReporter : *************************** APPLICATION FAILED TO START *************************** Description: Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured. 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).
原因：maven父子聚合工程，pom父项目中如果添加了数据库驱动依赖的话，boot项目的autoconfig回去读取加载DataSource相关的配置，读取不到即报错。在一些新项目初始或者不需要db的项目（比如eureka）中，可配置boot的启动类：
@SpringBootApplication(exclude = {DataSourceAutoConfiguration.class})
排除DataSource的自动扫描装配。