Exercises

In this chapter, we covered various aspects of the continuous delivery process. Since practice makes perfect, we recommend the following exercises:

1. Use Flyway to create a non-backward-compatible change in the MySQL database:
   1. Use the official Docker image, mysql, to start the database.
   2. Configure Flyway with a proper database address, username, and password.
   3. Create an initial migration that creates a USERS table with three columns: ID, EMAIL, and PASSWORD.
   4. Add sample data to the table.
   5. Change the PASSWORD column to HASHED_PASSWORD, which will store the hashed passwords.
   6. Split the non-backward-compatible change into three migrations, as described in this chapter.
   7. You can use MD5 or SHA for hashing.
   8. Check that the database doesn't store any passwords in plain text as a result.
2. Create a Jenkins shared library with steps to build and unit test Gradle projects:
   1. Create a separate repository for the library.
   2. Create two files in the library...