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

Deploying to Kubernetes

With this Kubernetes Deployment, we are closer to the goal of migrating our application. However, there is one thing we need to take care of and this has to do with pulling the images from a registry. As we have seen on ECS and ACI, it is essential to have a way for the container orchestration engine to be able to access the images from a registry. Since we are using Minikube, there is no need for us to provision a registry.

We can build our images and deploy them to the local Minikube registry. To achieve this, we shall point our build operations to the Minikube local registry.

We shall do this through the docker-env command of Minikube:

$ eval $(minikube docker-env)

Now, let’s build and deploy those images toward that registry:

$ docker compose build

Applying the files we’ve generated previously should now be streamlined.

Let’s start with the Redis deployments:

kubectl apply -f redis-deployment.yaml
kubectl apply...