Multiple datasources migrations using Flyway in a Spring Boot application

Question

We use Flyway for db migration in our Spring Boot based app and now we have a requirement to introduce multi tenancy support while using multiple datasources strategy. As pa

Answer 1

To make @Roger Thomas answer more the Spring Boot way:

Easiest solution is to annotate your primary datasource with @Primary (which you already did) and just let bootstrap migrate your primary datasource the 'normal' way.

For the other datasources, migrate those sources by hand:

@Configuration
public class FlywaySlaveInitializer {

     @Autowired private DataSource dataSource2;
     @Autowired private DataSource dataSource3;
     //other datasources

     @PostConstruct
     public void migrateFlyway() {
         Flyway flyway = new Flyway();
         //if default config is not sufficient, call setters here

         //source 2
         flyway.setDataSource(dataSource2);
         flyway.setLocations("db/migration_source_2");
         flyway.migrate();

         //source 3
         flyway.setDataSource(dataSource3);
         flyway.setLocations("db/migration_source_3");
         flyway.migrate();
     }
}