Building a Docker Image

This post starts a series of articles taking a deep dive on building Docker images. But before we look at building a Docker image let’s briefly recap the essentials we need to know about container images. A Docker image is built up from a series of layers where each layer represents an instruction in the image’s Dockerfile. Continue reading

Continuous delivery infrastructure as code

This is part 1 of a series of posts covering Docker in a Continuous Delivery environment. Today I’m showing how simple it is to setup a continuous delivery build pipeline infrastructure using Docker. In an upcoming post we will look at Jenkins pipeline as code creating Docker images and running integration tests against Docker containers. Continue reading

docker-compose scripting

This time we look at managing large numbers of compose projects. When building complex infrastructure using docker-compose we soon end in a mess of scripts for starting, updating, etc. containers. I will try to describe an approach that has helped to get this done in a very structured way. Continue reading

docker-compose modularization

In this blog post we are looking into how we can create modular compose projects. With docker-compose we can describe a bunch of containers and container related resources such as networks and volumes that make up an application. All this is usually going into a docker-compose. Continue reading

Bean Mapping of Transfer Objects

In the past years I have been working on multiple projects where the so-called Data Transfer Object (short DTO) pattern has been heavily used. This is a pattern that has even been a core pattern in the JEE world. This pattern certainly has its justification for the right cases. Continue reading

Build tool chain container images export DOCKER_BUILDKIT=1 docker image build -t martinahrer/ansible:alpine -f Dockerfile_ansible . docker image build -t martinahrer/footloose:alpine -f Dockerfile_footloose . docker image build -t martinahrer/inspec:alpine -f Dockerfile_inspec . Run all pipeline steps. cd src/main/ drone exec --trusted drone. Continue reading