Union filesystem (AUFS): A union filesystem layers multiple directories on a single host and presents them as a single directory.īefore you can download Docker Desktop on Windows 10, you must have the following: Tags: Docker tags are like labels that you can assign to any completed build. Repository (repo): Docker repositories allow you to share container images with others. Pull: docker pull is a command that allows you to download a specific image or set of images. They provide a layer of isolation, as each element of a container runs in a different namespace. Namespace: Namespaces are created when you run a container. Registries are organized into repositories, and they hold all of the versions of different images.ĭocker run: The run command allows you to create a container from a specified image and start that container using a given command. It has an API for interacting with the Docker daemon.ĭockerfile: A Dockerfile is a text-based document that holds the instructions for building Docker images.ĭocker Hub: Docker Hub is a service that allows you to find and share containers with your organization.ĭocker Registry: Docker Registry allows you to store and distribute named Docker images.
BUILD YOUR DOCKER IMAGE IN DOCKER FOR MAC CODE
Let’s take a look at some common Docker terms you’ll see when working with the platform.Ĭgroups: Control groups allow you to allocate resources among processes running on a system.Ĭontainer images: Docker images are files that you use to execute code in a Docker container.ĭocker build: docker build is a command that you use to build an image from a Dockerfile.ĭocker Engine: Docker Engine is the core product of Docker, which includes its daemon and CLI. With Swarm, you can turn multiple Docker hosts into a single host. In other words, it’s a container orchestration tool. It eliminates the need to maintain bash scripts to define services.ĭocker Swarm allows you to manage multiple containers across different host machines. With stack, you can describe multiple services in a single file. Docker stack is embedded into the Docker command-line interface (CLI). It can be used with popular cloud services such as AWS and Microsoft Azure.ĭocker stack allows you to manage a cluster of Docker containers with Docker Swarm. It’s a great tool for creating deployment environments and managing micro-services that run on your application. With Docker Machine, you can create a remote virtual machine and manage your containers. Docker Compose is great for development, testing, CI workflows, and staging environments.ĭocker-machine allows you to deploy your containerized applications to the cloud. You can think of it as an automated multi-container workflow. With Compose, you use a YAML file to configure your app’s services and orchestrate containers on a Docker daemon or on Docker Swarm. Let’s take a look at some of the most popular ones.ĭocker-compose allows you to define and run multi-container applications. Containers package your application and its container dependencies with everything it needs to run, including:ĭocker offers many different modules and plugins.
Docker containers create an abstraction at the application layer. Without these contributions, we wouldn’t have the rich container ecosystem we have today.Ĭontainerization wasn’t very accessible until Docker came along. Many contributors, including Google, have helped bring container-related technologies to the Linux kernel. What are now known as modern containers started as Linux containers (LXC). All containers on a host share that host’s operating system, which frees up a lot of system resources. The important difference between containers and VMs is that containers don’t need their own operating system.
We can think of containers as more lightweight versions of VMs. What are containers?įor a long time, companies have been using container technologies to address the weak points of virtual machines. Before we get into anything else, let’s talk about Docker containers.
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