Continuous Delivery with Docker and Jenkins

Using Docker Compose

The Ansible playbook is very similar to the Docker Compose configuration. They even both share the same YAML file format. What's more, it is possible to use docker-compose.yml directly from Ansible. We will show how to do it, but first, let's define the docker-compose.yml file.

version: "2"services:  calculator:    image: leszko/calculator:latest    ports:    - 8080  redis:    image: redis:latest

It is almost the same as what we defined in the previous chapter. This time we get the calculator image directly from the Docker Hub registry, and do not build it in docker-compose.yml, since we want to build the image once, push it to the registry, and then reuse it in every deployment step (on every environment), to make sure the same image ...