This shows a workflow that uses Vagrant to create a virtual machine and then provisions it with an operating system, Docker and the Kubernetes container orchestration framework. Typically, the instructions include creating one or many VMs, installing an operating system on the machines, and then adding the other required applications, such as the Docker components.įigure 2 below is an illustration that conceptually describes a Vagrant workflow process. When you run this command, by default, Vagrant looks in the current directory for the Vagrantfile and executes the instructions in the file. Vagrant is a tool focused on providing a consistent development environment workflow across multiple operating systems. You execute a Vagrantfile script using the command: vagrant up The following shows a sample Vagrantfile: # -*- mode: ruby -*. Under Vagrant, a provisioning script is named, Vagrantfile. Vagrant is one such tool however, there are others that perform similar tasks, such as Ansible and Terraform. The way you do this is by using a provisioning tool.
In order to support CI/CD in an automated deployment environment, you need a way to run scripts that create VMs, and then populate them with an operating system and other applications that are required to fulfill the VMs' purpose. Also, that machine must have the Docker runtime and daemon installed. Thus, in terms of an automated CI/CD process and in order for Docker to work, a real or virtual machine with an OS must exist.
A container image is a template upon which a container is realized at runtime, as shown in Figure 1 to the left.Ī container has no life of its own outside of the operating system. Amazon Web Services Elastic Compute Cloud (EC2) and similar Infrastructure-as-a-Service providers like Google Cloud, Azure or Digital Ocean, to name a few, are selling virtual machines with varying compute power. A container image is a template upon which an actual container is realized at runtime.ĭocker uses two main artifacts that are essential to container technology. Using Vagrant remotely with AWS EC2 and Docker Another powerful usage of Vagrant can be with remote IaaS resources such as Amazon EC2. The job of the Docker runtime is to create containers and run them on the operating system. The CLI tool is used to execute instructions to the Docker runtime at the command line. That computing environment can be a physical computer or a VM.ĭocker technology has two main components: the client command-line interface (CLI) tool and the container runtime. A container is a collection of one or more processes, organized under a single name and identifier that are isolated from the other processes running within a computing environment.
Understanding Dockerĭocker is a technology that is used to create and run containers. Then, once Docker is installed, that VM can run containers.
#Vagrant docker install
In other words, you use Vagrant to create a VM and install Docker. Essentially, Docker is a technology for creating and running Linux containers, and Vagrant is a machine provisioning tool used to create VMs and then populate them with applications.
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