Book Image

The Docker Workshop

By : Vincent Sesto, Onur Yılmaz, Sathsara Sarathchandra, Aric Renzo, Engy Fouda
5 (3)
Book Image

The Docker Workshop

5 (3)
By: Vincent Sesto, Onur Yılmaz, Sathsara Sarathchandra, Aric Renzo, Engy Fouda

Overview of this book

No doubt Docker Containers are the future of highly-scalable software systems and have cost and runtime efficient supporting infrastructure. But learning it might look complex as it comes with many technicalities. This is where The Docker Workshop will help you. Through this workshop, you’ll quickly learn how to work with containers and Docker with the help of practical activities.? The workshop starts with Docker containers, enabling you to understand how it works. You’ll run third party Docker images and also create your own images using Dockerfiles and multi-stage Dockerfiles. Next, you’ll create environments for Docker images, and expedite your deployment and testing process with Continuous Integration. Moving ahead, you’ll tap into interesting topics and learn how to implement production-ready environments using Docker Swarm. You’ll also apply best practices to secure Docker images and to ensure that production environments are running at maximum capacity. Towards the end, you’ll gather skills to successfully move Docker from development to testing, and then into production. While doing so, you’ll learn how to troubleshoot issues, clear up resource bottlenecks and optimize the performance of services. By the end of this workshop, you’ll be able to utilize Docker containers in real-world use cases.
Table of Contents (17 chapters)

12. Best Practices

Activity 12.01: Viewing the Resources Used by the Panoramic Trekking App


There are a number of ways in which we perform the first activity in this chapter. The following steps are one way to do this by using the docker stats command to view the resources being used by a service in the Panoramic Trekking App. For this example, we are going to use the postgresql-app service, which is running as part of the Panoramic Trekking App:

  1. Create a script that will create a new table and fill it with random values. The following script does exactly what we want in this situation as we want to create a long processing query and see how it affects the resources on our container. Add in the following details and save the file as resource_test.sql using your favorite editor:
    1 CREATE TABLE test_data
    2 (
    3     random_value NUMERIC NOT NULL,
    4     row1         NUMERIC NOT NULL,
    5   &...