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Docker Desktop for Windows is the Community version of Docker for Microsoft Windows.You can download Docker Desktop for Windows from Docker Hub.
By downloading Docker Desktop, you agree to the terms of the Docker Software End User License Agreement and the Docker Data Processing Agreement.
System requirements
Your Windows machine must meet the following requirements to successfully install Docker Desktop.
Hyper-V backend and Windows containers
Windows 10 64-bit: Pro, Enterprise, or Education (Build 17134 or higher).
For Windows 10 Home, see System requirements for WSL 2 backend.
- Hyper-V and Containers Windows features must be enabled.
The following hardware prerequisites are required to successfully run ClientHyper-V on Windows 10:
- 64 bit processor with Second Level Address Translation (SLAT)
- 4GB system RAM
- BIOS-level hardware virtualization support must be enabled in theBIOS settings. For more information, seeVirtualization.
WSL 2 backend
Step by Step Tutorial on How to Install Docker Compose on Ubuntu 18.04. Also, learn to create and manage new containers using Docker Compose applications. There are two versions of Docker – Docker CE (Community Edition) and Docker EE (Enterprise Edition). If you have a small-scale project, or you're just learning, you will want to use Docker CE. In this tutorial, learn how to install Docker on Ubuntu 18.04. Docker takes away repetitive, mundane configuration tasks and is used throughout the development lifecycle for fast, easy and portable application development - desktop and cloud. Docker's comprehensive end to end platform includes UIs, CLIs, APIs and security that are engineered to work together across the entire application delivery lifecycle. # # This script is meant for quick & easy install via: # $ curl -fsSL -o get-docker.sh # $ sh get-docker.sh # # For test builds (ie. Release candidates): # $ curl -fsSL -o test-docker.sh # $ sh test-docker.sh # # NOTE: Make sure to verify the contents of the script # you downloaded matches the. It can be used with the Docker Engine 1.8+ on Linux or on Docker for Mac/Windows. This quickstart specifically focuses on using the SQL Server on Linux image. The Windows image is not covered, but you can learn more about it on the mssql-server-windows-developer Docker Hub page.
- Windows 10 64-bit: Home, Pro, Enterprise, or Education, version 1903 (Build 18362 or higher).
- Enable the WSL 2 feature on Windows. For detailed instructions, refer to the Microsoft documentation.
The following hardware prerequisites are required to successfully runWSL 2 on Windows 10:
- 64-bit processor with Second Level Address Translation (SLAT)
- 4GB system RAM
- BIOS-level hardware virtualization support must be enabled in theBIOS settings. For more information, seeVirtualization.
- Download and install the Linux kernel update package.
Note
Docker supports Docker Desktop on Windows for those versions of Windows 10 that are still within Microsoft's servicing timeline.
What's included in the installer
The Docker Desktop installation includes Docker Engine,Docker CLI client, Docker Compose,Notary,Kubernetes,and Credential Helper.
Containers and images created with Docker Desktop are shared between alluser accounts on machines where it is installed. This is because all Windowsaccounts use the same VM to build and run containers. Note that it is not possible to share containers and images between user accounts when using the Docker Desktop WSL 2 backend.
Nested virtualization scenarios, such as running Docker Desktop on aVMWare or Parallels instance might work, but there are no guarantees. Formore information, see Running Docker Desktop in nested virtualization scenarios.
The Docker Desktop installation includes Docker Engine,Docker CLI client, Docker Compose,Notary,Kubernetes,and Credential Helper.
Containers and images created with Docker Desktop are shared between alluser accounts on machines where it is installed. This is because all Windowsaccounts use the same VM to build and run containers. Note that it is not possible to share containers and images between user accounts when using the Docker Desktop WSL 2 backend.
Nested virtualization scenarios, such as running Docker Desktop on aVMWare or Parallels instance might work, but there are no guarantees. Formore information, see Running Docker Desktop in nested virtualization scenarios.
About Windows containers
Looking for information on using Windows containers?
- Switch between Windows and Linux containersdescribes how you can toggle between Linux and Windows containers in Docker Desktop and points you to the tutorial mentioned above.
- Getting Started with Windows Containers (Lab)provides a tutorial on how to set up and run Windows containers on Windows 10, Windows Server 2016 and Windows Server 2019. It shows you how to use a MusicStore applicationwith Windows containers.
- Docker Container Platform for Windows articles and blogposts on the Docker website.
Install Docker Desktop on Windows
Double-click Docker Desktop Installer.exe to run the installer.
If you haven't already downloaded the installer (
Docker Desktop Installer.exe), you can get it from Docker Hub. It typically downloads to yourDownloadsfolder, or you can run it from the recent downloads bar at the bottom of your web browser.When prompted, ensure the Enable Hyper-V Windows Features or the Install required Windows components for WSL 2 option is selected on the Configuration page.
Follow the instructions on the installation wizard to authorize the installer and proceed with the install.
When the installation is successful, click Close to complete the installation process.
If your admin account is different to your user account, you must add the user to the docker-users group. Run Computer Management as an administrator and navigate to Local Users and Groups > Groups > docker-users. Right-click to add the user to the group.Log out and log back in for the changes to take effect.
Start Docker Desktop
Docker Desktop does not start automatically after installation. To start Docker Desktop, search for Docker, and select Docker Desktop in the search results.
When the whale icon in the status bar stays steady, Docker Desktop is up-and-running, and is accessible from any terminal window.
If the whale icon is hidden in the Notifications area, click the up arrow on thetaskbar to show it. To learn more, see Docker Settings.
When the initialization is complete, Docker Desktop launches the onboarding tutorial. The tutorial includes a simple exercise to build an example Docker image, run it as a container, push and save the image to Docker Hub.
Congratulations! You are now successfully running Docker Desktop on Windows.
If you would like to rerun the tutorial, go to the Docker Desktop menu and select Learn.
Automatic updates
Starting with Docker Desktop 3.0.0, updates to Docker Desktop will be available automatically as delta updates from the previous version.
When an update is available, Docker Desktop automatically downloads it to your machine and displays an icon to indicate the availability of a newer version. All you need to do now is to click Update and restart from the Docker menu. This installs the latest update and restarts Docker Desktop for the changes to take effect.
Uninstall Docker Desktop
To uninstall Docker Desktop from your Windows machine:
- From the Windows Start menu, select Settings > Apps > Apps & features.
- Select Docker Desktop from the Apps & features list and then select Uninstall.
- Click Uninstall to confirm your selection.
Important
Uninstalling Docker Desktop destroys Docker containers, images, volumes, andother Docker related data local to the machine, and removes the files generatedby the application. Refer to the back up and restore datasection to learn how to preserve important data before uninstalling.
Where to go next
- Getting started introduces Docker Desktop for Windows.
- Get started with Docker is a tutorial that teaches you how todeploy a multi-service stack.
- Troubleshooting describes common problems, workarounds, andhow to get support.
- FAQs provide answers to frequently asked questions.
- Release notes lists component updates, new features, and improvements associated with Docker Desktop releases.
- Back up and restore data provides instructions on backing up and restoring data related to Docker.
Installing Docker on Ubuntu is simple because Ubuntu provides Docker in its repositories. However, Docker is not available in CentOS's default repositories.
Docker Installer Download
Fret not, there are three ways you can install docker on a CentOS Linux system.
- Using docker's repository
- Downloading the RPM
- Using helper scripts
Here, I'll walk you through the installation process of Docker CE using docker's RPM repository.
Docker CE stands for Docker Community Edition. This is the free and open source version of Docker. There is Docker EE (Enterprise Edition) with paid support. Most of the world uses Docker CE and it is often considered synonymous to Docker.
Installing Docker on CentOS
Before going any further, make sure you have the system updated. You can update the CentOS using:
Step 1: Add the official repository
Add docker's official repository using the following command
You should also update the package cache after adding a new repository:
Step 2: Install Docker CE
The trouble with using a custom repository is that it may have dependency issue if you try installing the latest version of docker-ce.
For example, when I check the available versions of docker-ce with this command:
I got docker-ce-3:19.03.9-3.el7 as the latest version. But the problem in installing the latest version is that it depends on containerd.io version >=1.2.2-3. Now, this version of containerd.io is not available in CentOS 8.
To avoid this dependency cycle and battling them manually, you can use the --nobest option of the dnf command.
It will check the latest version of docker-ce but when it finds the dependency issue, it checks the next available version of docker-ce. Basically, it helps you automatically install the most suitable package version with all the dependencies satisfied.
To install docker in CentOS without getting a migraine, try this command and see the magic unfold on your terminal screen:
You'll be prompted to import a GPG key, make sure the key matches to 060A 61C5 1B55 8A7F 742B 77AA C52F EB6B 621E 9F35 before entering 'y'.
containerd.io is a daemon for managing containers. Docker is just one form of Linux containers. To make the various types of container images portable, Open Container Initiative has defined some standards. containerd is used for managing the container images conforming to OCI standard.
Setting up docker on CentOS
Alright! You have docker installed but it's not yet ready to be used yet. You'll have to do some basic configurations before it can be used smoothly.
Run docker without sudo
You can run docker without any sudo privileges by adding your user to the docker group.
The docker group should already exist. Check that using the following command:
If this outputs nothing, create the docker group using groupadd command like this:
Now add your user to the docker group using the usermod command:
Change the user_name in the above command with the intended user name.
Now log out and log back in for the group change to take effect.
Start docker daemon
Docker is installed. Your user has been added to the docker group. But that's not enough to run docker yet.
Before you can run any container, the docker daemon needs to be running. The docker daemon is the program that manages all the containers, volumes, networks etc. In other words, the daemon does all the heavy lifting.
Start the docker daemon using:
Docker Install Mac Download
You can also enable docker daemon to start automatically at boot time:
Verify docker installation by running a sample container
Everything is done. It's time to test whether the installation was successful or not by running a docker container.
To verify, you can run the cliché hello-world docker container. It is a tiny docker image and perfect for quickly testing a docker installation.
If everything is fine, you should see an output like this:
Here's what the command is doing behind the hood:
- The docker client, i.e. the command line tool that you just used, contacted the docker daemon.
- The daemon looked for hello-world docker image in the local system. Since it doesn't find the image, it pulls it from Docker Hub.
- The engine creates the container with all the options you provided through the client's command line options.
This hello-world image is used just for testing a docker installation. If you want a more useful container, you can try running Nginx server in a container like this:
Once the command is done running, open up a browser and go to http://your_ip_address:56788. I hope you know how to know your IP address in Linux.
You should see nginx server running. You can stop the container now.
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I hope this tutorial helped you in installing docker on CentOS. Do subscribe for more Docker tutorials and DevOps tips.
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