Summary

We’ve gone into the realm of containerization and examined the numerous advantages of utilizing Docker containers for your applications in this chapter. The fundamentals of creating and running a simple Docker image and container are explained, as well as some more sophisticated instances using our audiofile application, which requires the construction of multiple containers that can be composed and run together.

Clearly, utilizing Docker for integration testing boosts your trust in the whole system, and we discussed how to run integration tests using Docker Compose.

At the same time, we’ve acknowledged some of Docker’s drawbacks, such as the increased complexity of maintaining containerized applications, the additional burden of operating several containers on a single host, and the external dependency of Docker itself.

Overall, this chapter has given you a strong knowledge of when to utilize Docker containers for command-line applications—...