Exercises

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

1. Use Flyway to create a non-backwards-compatible change in the MySQL database:

   • Use the official Docker image, mysql, to start the database
   • Configure Flyway with proper database address, username, and password
   • Create an initial migration that creates a users table with three columns: id, email, and password
   • Add a sample data to the table
   • Change the password column to hashed_password, which will store the hashed passwords
   • Split the non-backwards-compatible change into three migrations as described in this chapter
   • You can use MD5 or SHA for hashing
   • Check that, as a result, the database stores no passwords in plain text
2. Create a Jenkins shared library with steps to build and unit test Gradle projects:
   • Create a separate repository for the library
   • Create two files in the library: gradleBuild.groovy and gradleTest.groovy
   • Write the appropriate call...