title: Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured. Reason: Fa
body: <p>I am developing a web application by using the Spring Boot, Spring Cloud Config and Docker. There are 3 projects. One is springboot web, Spring Cloud Config Server and MySql Database. I have use the Spring Boot Web with Themeleaf. It's basically perform a CRUD operation. In the development phase it's working fine. But when I deploy it in the Docker
  Spring-Boot webapp container(springboot-thymeleaf-web-crud) is giving me the following error--</p>
  
  <hr>
  
  <p>APPLICATION FAILED TO START</p>
  
  <hr>
  
  <p>Description:</p>
  
  <p>Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured.</p>
  
  <p>Reason: Failed to determine a suitable driver class</p>
  
  <p>Action:</p>
  
  <p>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).</p>
  
  <p>I have created 3 container on Docker Compose file. </p>
  
  <pre><code>version: '3'
  
  services: 
     springboot-thymeleaf-web-crud:
        image: numery/springboot-thymeleaf-web-crud:latest
        networks: 
           - employee-network
        ports:
           - 8080:8080 
        depends_on:
           - employee-database   
           - spring-cloud-config-server-employee
  
     spring-cloud-config-server-employee:
        image: numery/spring-cloud-config-server-employee:latest
        networks: 
           - employee-network
        ports:
           - 8888:8888
  
     employee-database:
        image: mysql:5
        networks:
           - employee-network
        environment:
           - MYSQL_ROOT_PASSWORD=rootpassword
           - MYSQL_DATABASE=employee_directory
        volumes:
           - /home/numery/Docker-Database/employee_directory:/var/lib/mysql
  
  networks:
     employee-network:
  </code></pre>
  
  <p>SpringBoot Web Application.properties is given below</p>
  
  <pre><code>spring.application.name=employee-service-mysql
  server.port=8080
  spring.cloud.config.uri=http://spring-cloud-config-server- 
  employee:8888
  spring.profiles.active=dev
  </code></pre>
  
  <hr>
  
  <p>SpringBoot Config Server is providing the following properties--</p>
  
  <pre><code>spring.datasource.url: jdbc:mysql://employee- 
  database:3306/employee_directory? 
  useSSL=false&amp;serverTimezone=UTC&amp;useLegacyDatetimeCode=false
  spring.datasource.username: root
  spring.datasource.password: rootpassword
  spring.datasource.validationQuery: SELECT 1
  spring.datasource.driver-class-name=com.mysql.jdbc.Driver
  
  spring.tomcat.max-wait: 20000
  spring.tomcat.max-active: 50
  spring.tomcat.max-idle: 20
  spring.tomcat.min-idle: 15
  
  spring.jpa.properties.hibernate.dialect: 
  org.hibernate.dialect.MySQL5InnoDBDialect
  spring.jpa.show-sql: true
  spring.jpa.format-sql: true
  spring.jpa.database: MYSQL
  spring.jpa.hibernate.ddl-auto: create
  </code></pre>
  
  <p>Out of these 3 containers Mysql and Spring Cloud Config container is working fine. But for the Spring Boot Webapp(springboot-thymeleaf-web-crud) is exiting by giving the error above. </p>
  
  <p>Note: I use the same datasouce(Spring Data JPA) configuration on some other SpringBoot Rest API. Which are working fine. But this is the first time I am using SpringBoot Web. Do I need to explicitly define any configuration on the data-source.</p>
  
  <p>Please help!!</p>