Book Image

A Developer's Essential Guide to Docker Compose

By : Emmanouil Gkatziouras
Book Image

A Developer's Essential Guide to Docker Compose

By: Emmanouil Gkatziouras

Overview of this book

Software development is becoming increasingly complex due to the various software components used. Applications need to be packaged with software components to facilitate their operations, making it complicated to run them. With Docker Compose, a single command can set up your application and the needed dependencies. This book starts with an overview of Docker Compose and its usage and then shows how to create an application. You will also get to grips with the fundamentals of Docker volumes and network, along with Compose commands, their purpose, and use cases. Next, you will set up databases for daily usage using Compose and, leveraging Docker networking, you will establish communication between microservices. You will also run entire stacks locally on Compose, simulate production environments, and enhance CI/CD jobs using Docker Compose. Later chapters will show you how to benefit from Docker Compose for production deployments, provision infrastructure on public clouds such as AWS and Azure, and wrap up with Compose deployments on said infrastructure. By the end of this book, you will have learned how to effectively utilize Docker Compose for day-to-day development.
Table of Contents (19 chapters)
1
Part 1: Docker Compose 101
6
Part 2: Daily Development with Docker Compose
12
Part 3: Deployment with Docker Compose

Declaring Docker volumes on Compose files

We’ve been able to create a Docker volume and use it, and had a look at its features. The step next is to create and use volumes using Compose. Volumes on Compose are defined in the volumes sections:

services:
  nginx:
    image: nginx
volumes:
  example-compose-volume:

The configuration option on volumes can apply to example labels:

services:
  nginx:
    image: nginx
volumes:
  example-compose-volume:
    labels:
      - com.packtpub.compose.app=volume-example

Alternatively, you can have more advanced configurations, for example, a driver that is configured to use nfs:

services:
volumes:
  nfsvol: 
    driver_opts: 
      type: "nfs" 
      o: "addr=127.0.0.1,nolock,rw" 
  ...