Docker News Archive: Docker For Mac
Docker Toolbox is the existing solution to run Docker on Windows and Mac. It’s uses Oracle VirtualBox, which is its biggest weakness. I have not been able to get VirtualBox working on recent Windows 10 builds, no amount of reinstalling and troubleshooting has helped. The VirtualBox error incidentally was ' Cannot rename this connection.
A connection with the name that you specified already exists'. This has meant Docker Toolbox has been a dead-end for me, so I was super keen to learn about Docker for Windows. The big news out of the gate, is Docker for Windows doesn’t use Oracle VirtualBox at all. Why use a third party virtualization solution, when one is built into Windows?
That’s right Docker for Windows uses Hyper-V. This alone is a major boon, I know VirtualBox has its fans but it’s the only reason I had it installed, to support Docker Toolbox. Docker for Windows features Here is the official list of features.
Faster and more reliable - No more VirtualBox! Docker Engine runs a xhyve VM on top of an Alpine Linux distribution. On Windows the Docker Engine is running in a Hyper-V VM. Native apps for better tools integration - Docker for Mac and Docker for Windows are native applications, including native user interfaces and the ability to stay updated automatically. The Docker tools are bundled with these apps, including the Docker command line interface (CLI), Docker Compose, and Docker Machine. Use with Docker Toolbox and Docker Machine - Docker for Mac and Docker for Windows can be used at the same time as Docker Toolbox on the same machine. Volume mounting for your code and data - Volume data access is fast and works correctly. Support for multiple architectures out-of-the-box - Docker for Mac and Windows lets you build and run Docker images for Linux x86 and ARM.
See Docker for Mac and Docker for Windows in action in this video. What to know before you install Signing up for the beta takes some patience, it took a few weeks for my invite to come through: You can today.
This is a limited availability private beta and signing up will add you to a waiting list. We will add more people from the waiting list on a rolling basis as we get feedback and improve the product quality. Docker will send you an email when you have been accepted into the beta with a subject of ' Docker Private Beta - Token and Download included!' This has a link to the installer and documentation.
Only certain versions of Windows are supported: The current version of Docker for Windows runs on 64bit Windows 10 Pro, Enterprise and Education (1511 November update, Build 10586 or later). In the future we will support more versions of Windows 10. The getting started guide says that VirtualBox will no longer work after installation, so the point about running Docker for Windows alongside Docker Toolbox may be moot. To switch back to Docker Toolbox would require disabling Hyper-V. If Hyper-V isn't already enabled the installer will enable this for you during the installation.
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Installing Docker for Windows Installation was really quick, around 15 seconds on my Surface Pro 3. There weren't any options or anything notable, just run InstallDocker.msi to start the installation. At the end, after I selected the option to start Docker, I got this prompt, which was expected. I purposely didn't enable Hyper-V myself, as I wanted to see how Docker handled it.
This is the article lined to by the way for the manual Hyper-V install -. Running Docker for Windows I'd been impressed up until this point and it was going all so well until I tried running an actual docker command.
Running any docker command brought up this error Error response from daemon: dial tcp 10.0.75.2:2375: connectex: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond. There are other reports on the forum about this issue that didn't really yield any answers. I am not sure how I fixed it, apart from using the reset to factory defaults option and turning off the firewall. After a reboot I could run docker commands, as shown below. Docker will run in the background at startup but you can turn this off in the settings. Docker for Windows Closing Thoughts Docker for Windows is going to be awesome but it's definitely not ready for prime time just yet.
It's understandable with a new beta version around once a week, it's going to take some time for the development to settle down. In all fairness it's hard to blame some of these issues, when their running on Windows 10 pre-release insider builds.
Talk about cutting edge. Already though, it shows huge promise and is a big improvement compared to Docker Toolbox. I'll be following the developments closely and posting more, so stay tuned. In the meantime why not check out my and learn how I use Docker to host this very site.
Docker Install Mac
Image Courtesy Docker Docker on Linux works by using native Linux virtualization facilities like cgroups and namespaces which isolates resources like CPU, memory, I/O etc. On Mac and Windows, till date, Docker would install Docker Toolbox which is all the docker commands and VirtualBox. During installation Docker also installs a “default” VirtualMachine running the boot2docker Linux distribution, which is managed by the docker-machine command. All docker images and container are spun up in this Linux VM. So a Linux Virtul Machine running on VirtualBox or some other provider was pretty much necessary to run Docker on Mac and Windows.until now. Introducing Docker for Mac With Docker 1.11.0 Docker will run natively on Mac and Windows. Docker will be supported on Windows 10 running Hyper-V and Mac OS X 10.10.3 or higher using.
I managed to get my paws on the private beta which is currently by invite only. Once you get the invite, you get sent a code. You can download the installer and install the binaries from the beta site, however once you try to run it it asks you to enter your invite code. Once you enter your invite code your installation is activated. The installer asks for priviledged access since it creates links from /Applications into /usr/local. Any previous installation of Docker will be overwritten at this point. If you had a previous installation of Docker and a virtual machine called “default”, at this point the installer will offer to migrates all your images and containers to the new installation.
Depending on your Docker use and the number of images and containers you have this migration can take quite some time. So grab a coffee. And finally after about 10 minutes we are done. After you click OK, a tiny little whale show up in your task bar with the message shown below. You can click the tiny whale any time to open the settings. Docker Menu Clicking on Dashboard says a native dashboard is coming soon and for now we can use Kinematic. Similarly clicking on logs suggests using the logs utility from Utilities or checking them out from the command line.
There are various differences between Docker Toolkit (The Old Docker) and Docker for Mac. During the installation, Docker for Mac creates a brand new virtual machine called default under the xhyve virtualization framework. Your existing default VM under VirtualBox is left untouched, however it does offer to migrate your containers and images from the previous default VM to the new default. This is the migration that took 10 minutes. Docker for Mac does not use docker-machine command to manage the new default vm. Nor does it migrate any other virtual machines you may have created using the docker-machine command. Before you can start using Docker for Mac, you should unset any command line Docker variables you have set so that you don’t accidentally connect to your previous Docker installation.
Mac Docker Image
Docker New Image
You can unset your Docker variables by running the command.