What Does Docker Do, and When Should You Use It?

Docker Desktop is secure, out-of-the-box containerization software offering developers and teams a robust, hybrid toolkit to build, share, and run applications anywhere. It provides a straightforward GUI (Graphical User Interface) that lets you manage your containers, applications, and images directly from your machine. You might create your own images or you might only use those created by docker what is it others
and published in a registry. To build your own image, you create a Dockerfile
with a simple syntax for defining the steps needed to create the image and run
it. When you
change the Dockerfile and rebuild the image, only those layers which have
changed are rebuilt. This is part of what makes images so lightweight, small,
and fast, when compared to other virtualization technologies.

what is docker desktop

If you need to switch servers, it’s as easy as migrating those containers to a new server. If you need to scale, you can move one of those containers to a new server, or deploy it across a cluster of servers. Docker takes the same kind of version control and packaging that tools like Git and NPM provide and allows you to use it for your server software.

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If you want to become an early adopter, check out our guide for installing the Docker Desktop for Linux Tech Preview. You can play a key role in helping improve Docker Desktop for Linux prior to launch. Once you type the command, Docker recognizes the flags, executes the command, and looks for the image locally. If you don’t have an image by this name on your system, Docker will automatically find and retrieve it from Docker Hub. If you’re new to Docker, just think that Docker Hub is to Docker what GitHub is to Git. Ideal for businesses looking for centralized management and advanced security capabilities.

Docker’s containerization technology directly supports these DevOps principles by enhancing how teams consistently develop, deploy, and operate software across various environments. This consistency is crucial for operations teams deploying and managing these applications in production settings. The Containers view provides a runtime view of all your containers and applications. It allows you to interact with containers and applications, and manage the lifecycle of your applications directly from your machine. This view also provides an intuitive interface to perform common actions to inspect, interact with, and manage your Docker objects including containers and Docker Compose-based applications.

Are There Any Containerization Alternatives to Docker?

To run Windows containers, you need Windows 10 or Windows 11 Professional or Enterprise edition. Windows Home or Education editions only allow you to run Linux containers. In this hands-on guide, you will see how to run a Docker container using Docker Desktop. The Volumes view displays a list of volumes and allows you to easily create and delete volumes and see which ones are being used. You should see something like the screenshot below, where a container called objective_merkle is visibly running. Container names are randomly generated—with the first word being an adjective, and the last name referencing either a notable scientist or hacker (more information in this GitHub repo).

what is docker desktop

This is different than virtual machines (VMs), which encapsulate an entire OS with executable code on top of an abstracted layer of physical hardware resources. This means we help address tricky issues with annoying customer impacts like the previous work on Docker Desktop for Mac. As well as setting up this VM, Docker Desktop will keep this VM up to date for you over time by applying kernel patches or other security fixes as are required. Great developer tools are magic for new developers and save experienced developers a ton of time.

current community

Docker images may retain root access to the host by default, although this is often carried over from third-party vendors’ packages. Throughout this article, we have explored how Docker technology revolutionizes the deployment and management of applications. Docker enables an unparalleled level of efficiency and flexibility in software development. Kubernetes, also known as K8, is an open-source container orchestration platform. It is great for automating the deployment, scaling, and operation of containerized applications.

what is docker desktop

You can quickly spin containers up and down, accelerating the various stages of the pipeline. In Continuous Integration and Continuous Deployment (CI/CD) pipelines, Docker offers a consistent, reproducible, and efficient means of automating the testing and deployment of code. This means you can work on different components or versions of an application without any interference. To avoid this, you should delete Docker images regularly to reclaim valuable disk space. This blog centers primarily on Docker Desktop for Mac and Windows, but we’re thrilled to announce that Docker Desktop for Linux is coming soon. Docker Desktop for Linux (DD4L) is the second-most popular feature request in our public roadmap.

What to Use for Docker Deployment and Orchestration?

Designed for individual developers and small teams, the Docker Community Edition demonstrates Docker’s commitment to providing accessible and adaptable tools for a wide range of users. In any Docker introduction, containers are lightweight, standalone, executable software packages that encapsulate everything necessary to run an application. Containers package all the dependencies and code your app needs to run into a single file, which will run the same way on any machine. Start developing on your local machine and immediately connect with remote resources. Docker Desktop’s single installer sets up everything you need to start building, sharing, and running containers in seconds. Docker Desktop is a one-click-install application for your Mac, Linux, or Windows environment
that lets you build, share, and run containerized applications and microservices.

There are third-party tools that work with Docker for tasks such as container management and clustering. Docker competes with proprietary application containers such as the VMware vApp and infrastructure abstraction tools, including Chef. A historically persistent issue with containers — and Docker, by extension — is security.

If you’d like a more in depth tutorial on networking, deployment, and containerizing existing applications, we recommend reading this guide. For example, if your app needs to install dependencies, you could do something like RUN cd src/ && npm install. Anything that your app needs to bootstrap it’s installation and get up and running is defined in the Dockerfile. If your app makes use of nginx and Node.js, the container image will include them, but you won’t be burdened with all the other userland apps you’d generally find on Linux.

This is why we install and keep up to date the best Linux container tooling for you inside the VM. From the Docker Desktop menu, you can toggle which daemon (Linux or Windows)
the Docker CLI talks to. Select Switch to Windows containers to use Windows
containers, or select Switch to Linux containers to use Linux containers
(the default).

Docker

In modern software development, the microservices approach involves breaking down an application into a suite of more minor, interconnected services. Each service runs its process and communicates with others via lightweight mechanisms, often through an HTTP-based API. These images are created using a series of Docker commands that define the parameters and components necessary for the application. The Docker daemon runs on the host operating system and manages Docker containers. Once you issue commands through the Docker CLI, they communicate with the Docker daemon, enabling it to build, manage, and run Docker containers.

  • He has extensive expertise in Linux and VPS, authoring over 200 articles on server management and web development.
  • CoreOS rkt is noted for its security with support for SELinux and trusted platform management.
  • However, the seamless integration and interoperability of these tools makes Docker Desktop user-friendly—regardless of your experience with Docker.
  • The Docker Engine is the underlying technology that handles the tasks and workflows involved in building container-based applications.
  • This is because all Windows
    accounts use the same VM to build and run containers.

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