Continuous Delivery with Docker and Jenkins

Avoiding shared database

In many systems, we can spot that the database becomes the central point that is shared between multiple services. In such a case, any update to the database becomes much more challenging because we need to coordinate it between all services.

For example, imagine we develop an online shop and we have a Customers table that contains the following columns: first name, last name, username, password, email, and discount. There are three services that are interested in the customer's data:

• Profile manager: This enables editing user's data
• Checkout processor: This processes the checkout (reads username and email)
• Discount manager: This analyzes the customer's orders and sets the suitable discount

Let's look at the following ...