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Installing docker and docker-machineįollow the next steps to install docker and docker machine

From our own personal computer, the docker-machine command, allow us connecting to all our docker machines to manage their containers and images.Ģ.1. Each docker machine can manage multiple docker images and containers.

Like physical machines, docker machines has an specific IP address. Indeed, containers like processes, can be created, stopped, died, or running.ĭocker machines are local (and virtual) machines or remote machines(e.g in a cloud such as Amazon AWS or DigitalOcean) with a docker running. These could be compared with the concepts of program and process. Therefore, Docker allow having multiple containers of an specific Docker image. These runtime environments are called Docker images, which are the result of executing the set of commands that appear in an specific script-like file called Dockerfile. For example, to simulate a machine with an specific database up. Docker distinguishes three important concepts: docker machines, docker images and containers.ĭocker containers are executions of an specific runtime environment. In order to use docker, it is important to have clear some vocabulary. Therefore, the automation of Docker mainly offers facilities for integration tests and continuous delivery. A computer with docker can run multiple containers at the same time. In contrast with virtual machines like VirtualBox, Docker uses resource isolation features of the Linux kernel to allow independent “containers” to run within a single Linux instance, avoiding the overhead of starting and maintaining virtual machines. Why do we need Docker?ĭocker is a tool to avoid the usual headaches of conflicts, dependencies and inconsistent environments, which is an important problem for distributed applications, where we need to install or upgrade several nodes with the same configuration.ĭocker is a container manager, which means that is able to create and execute containers that represent specific runtime environments for your software. Understanding the commands 3.1 Creating a machine 3.2 Creating an image 3.3 Creating a container 3.4 Cleaning the environment 4.Running integration tests with Maven 4.1 Maven configuration 4.2 Creating the tests 4.3 Running the tests 5.Download the source code 1.