(errorHandling) Spring Boot, Failed to configure a DataSource 'url' attribute is not specified and no embedded datasource could be configured.

Error log.

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

***************************
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).

Process finished with exit code 0

문제.

(서론)

프로젝트는 application-dev.yml과 datasource-dev.yml가 있습니다.

• application-dev.yml은 일반적으로 설정되는 script가 작성되어 있음.
• datasource-dev.yml은 datasource에서 사용할 값에 대한 명시가 되어 있음

(문제)
Spring boot와 MySQL를 연결할 때 필요한 정보가 없거나 잘못되었기 때문에 발생했습니다.

해결.

1. 문제 파일에서는 spring.profiles.active=dev가 있었습니다. 이를 지워주었습니다.
2. spring.config.import = -classpath:/datasource-dev.yml을 추가해주었습니다.
3. 빌드전, 구성편집에 진입하여 활성화된 프로파일 (Active profiles)에 dev를 넣어주었습니다.

application-dev.yml

spring:
  config:
    import:
      - classpath:/datasource-dev.yml

  datasource:
    driver-class-name: ${SPRING_DATASOURCE_DEV.DRIVER}
    url: ${SPRING_DATASOURCE_DEV.URL}
    username: ${SPRING_DATASOURCE_DEV.USERNAME}
    password: ${SPRING_DATASOURCE_DEV.PASSWORD}

  jpa:
    database: mysql
    database-platform: org.hibernate.dialect.MySQLDialect
    show-sql: true
    hibernate:
      ddl-auto: update
    properties:
      hibernate:
        format_sql: true

datasource-dev.yml

SPRING_DATASOURCE_DEV:
  DRIVER: com.mysql.cj.jdbc.Driver
  URL: jdbc:mysql://localhost:3306/springbootstudydb
  USERNAME: root
  PASSWORD: 1234