Docker Desktop WSL 2 backend. Estimated reading time: 7 minutes. Windows Subsystem for Linux (WSL) 2 introduces a significant architectural change as it is a full Linux kernel built by Microsoft, allowing Linux containers to run natively without emulation.
Like Max says, Docker for WSL2 creates two distros docker-desktop and docker-desktop-data. After some digging around I finally about the layer data, and it's here: wsl$ docker-desktop-data version-pack-data community docker overlay2. With Docker Desktop, developers using Windows 10 can not only run Windows containers, but also Linux containers. Windows and Linux container modes. The way this works is that Docker for Desktop has two modes that you can switch between: Windows containers, and Linux containers. To switch, you use the right-click context menu in the system tray. Docker Desktop for Windows. Pantonis (Pantonis) November 3, 2016, 7:00am #1. Hi, I wanted to ask if Docker is compatible with windows server 2012 r2?
A common developer workflow when using frameworks like Symfony or React is to edit the source code using a Windows IDE while running the app itself in a Docker container. The source is shared between the host and the container with a command like the following:
$ docker run -v C:Usersme:/code -p 8080:8080 my-symfony-app
This allows the developer to edit the source code, save the changes and immediately see the results in their browser. This is where file sharing performance becomes critical.
The latest Edge release of Docker Desktop for Windows 2.1.7.0 has a completely new filesharing implementation using Filesystem in Userspace (FUSE) instead of Samba which:
- uses caching to (for example) reduce page load time in Symfony by up to 60%;
- supports Linux inotify events, triggering automatic recompilation / reload when the source code is changed;
- is independent of how you authenticate to Windows: smartcard, Azure AD are all fine;
- always works irrespective of whether your VPN is connected or disconnected;
- reduces the amount of code running as Administrator.
Your feedback needed!
This improvement is available today in the Edge 2.1.7.0 release and will roll-out to the stable channel later once we’ve had enough positive feedback. Please download it, give it a try and let us know how it goes. If you discover any problems, please report them on GitHub and make sure you fill descriptions and reproduction steps so that we can quickly investigate.
Big performance improvements
Performance is vital when application source code is being shared between the host and a container. For example when a developer uses the Symfony PHP framework, edits the source code and then reloads the page in the browser, the web-server in the container must re-read many PHP files stored on the host. This must be fast.
The following graph shows the time taken to load a page of a simple symfony demo in three configurations:
- Previous version: this is the implementation in earlier versions of Docker Desktop
- Docker Desktop Edge 2.1.7.0: this is the new (faster!) implementation
- In-container: the files are not shared from the host at all, instead they are stored in the container to show the upper limit on possible future performance.
The two bars on the left hand side show the latency (in seconds) using an older version of Docker Desktop. Note that the second fetch is only slightly better than the first, suggesting that the effect of caching is small.
The two bars on the right hand side show the latency when the files are not shared at all, but are stored entirely inside the VM. This is the upper limit on performance if the volume sharing system were perfect and had zero overheads.
The two bars in the middle show the latency when the files are shared with the new system in Docker Desktop Edge 2.1.7.0. The initial (uncached) fetch is already better than with the previous Desktop version, but the second (cached) fetch is 60% faster!
Docker For Desktop Windows
Additional enhancements
As well as big performance improvements, the new implementation has the following additional benefits:
Docker For Desktop Windows Server
- The new version can’t conflict with organisation-wide security policies as we don’t need to use Administrator privileges to share the drive and create a firewall exception for port 445.
- The new version doesn’t require the user to enter their domain credentials. Not only is this fundamentally more secure, but it avoids the user having to re-enter their credentials every time they change their password. Many organisations require regular password changes, which means the user needed to refresh the credentials frequently.
- The new version supports users who authenticate via a smartcard, or AzureAD or any other method. Previously we could only support users who login with a username and password.
- The new version is immune to a class of problems caused by enterprise VPN clients and endpoint security software clashing with the Hyper-V network adapter.
Stay tuned for a follow up post that deep dives into the new Docker Desktop filesharing implementation using FUSE.
Docker For Desktop Windows Kubernetes
Estimated reading time: 3 minutes
Docker Desktop for Mac is the Community version of Docker for Mac.You can download Docker Desktop for Mac 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 Mac must meet the following requirements to successfully install Docker Desktop:
macOS must be version 10.14 or newer. That is, Mojave, Catalina, or Big Sur. We recommend upgrading to the latest version of macOS.
If you experience any issues after upgrading your macOS to version 10.15, you must install the latest version of Docker Desktop to be compatible with this version of macOS.
Note
Docker supports Docker Desktop on the most recent versions of macOS. That is, the current release of macOS and the previous two releases. As new major versions of macOS are made generally available, Docker stops supporting the oldest version and supports the newest version of macOS (in addition to the previous two releases). Docker Desktop currently supports macOS Mojave, macOS Catalina, and macOS Big Sur.
At least 4 GB of RAM.
VirtualBox prior to version 4.3.30 must not be installed as it is not compatible with Docker Desktop.
What’s included in the installer
The Docker Desktop installation includes Docker Engine, Docker CLI client, Docker Compose, Notary, Kubernetes, and Credential Helper.
Install and run Docker Desktop on Mac
Double-click
Docker.dmgto open the installer, then drag the Docker icon to the Applications folder.Double-click
Docker.appin the Applications folder to start Docker. (In the example below, the Applications folder is in “grid” view mode.)The Docker menu in the top status bar indicates that Docker Desktop is running, and accessible from a terminal.
If you’ve just installed the app, 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.
Click the Docker menu () to seePreferences and other options.
Select About Docker to verify that you have the latest version.
Congratulations! You are now successfully running Docker Desktop.
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 Mac:
- From the Docker menu, select Troubleshoot 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 provides an overview of Docker Desktop on Mac, basic Docker command examples, how to get help or give feedback, and links to other topics about Docker Desktop on Mac.
- Troubleshooting describes common problems, workarounds, howto run and submit diagnostics, and submit issues.
- FAQs provide answers to frequently asked questions.
- Release notes lists component updates, new features, and improvements associated with Docker Desktop releases.
- Get started with Docker provides a general Docker tutorial.
- Back up and restore data provides instructionson backing up and restoring data related to Docker.
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