報錯相關信息：
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父項目中如果添加了數據庫驅動依賴的話，boot項目的autoconfig回去讀取加載DataSource相關的配置，讀取不到即報錯。在一些新項目初始或者不需要db的項目（比如eureka）中，可配置boot的啟動類：
@SpringBootApplication(exclude = {DataSourceAutoConfiguration.class})
排除DataSource的自動掃描裝配。