Docker for mac file sharing code#
Docker for mac file sharing free#
Docker for mac file sharing mac#
Docker for mac file sharing windows#

But if performance becomes a problem, then (1) make sure that youвЂ™re only sharing what you need to share, and (2) consider what could be shared in some other way than a bind mount. ItвЂ™s convenient to use bind mounts at first, and you may find that they are fine for your use case. This gives us the main tip in optimizing performance.

In WSL 2, Windows manages file sharing rather than Docker managing it, but the same performance considerations apply: files mounted from the Windows file system can be slow, named volumes are fast, but in this case there is another option: files stored in the Linux filesystem are also inside the WSL VM so are fast too. Named volumes do not suffer from the same problem because they are created inside the VMвЂ™s own filesystem, so they are as fast as on a Linux machine.

On Linux, the container has direct access to the bind-mounted filesystem, and because the implementation on Mac and Windows вЂњfeels nativeвЂќ, people intuitively expect the same performance there. And because Docker Desktop does such a good job of hiding the underlying VM, itвЂ™s not obvious why this is happening. ItвЂ™s only tiny, but in a development environment with a huge source tree and lots of reads and writes, it adds up, and can visibly affect performance. Unfortunately itвЂ™s in the nature of virtualization that there is always an unavoidable small overhead in crossing the host-VM boundary. It does this by setting up a Linux VM (or optionally a WSL 2 environment on Windows) in which to run the Docker engine and your containers, and then passing CLI commands, networking and files between the host and the VM. Docker Desktop is fundamentally an environment to develop and run Linux containers on your Mac or Windows machine, with seamless integration into the host so that it appears as if theyвЂ™re running natively. Many people imagine that Docker Desktop is just a UI on top of some open source tools, but thatвЂ™s only a small part of what it is. To understand the performance differences between the options, we first have to talk briefly about how Docker Desktop works.

You can also browse their contents from the Docker Desktop UI, using the Volumes tab that we added recently (and that is now free for all users including Docker Personal). These volumes persist even after the container has been deleted, and can be shared with other containers. You can create a named volume with a command like docker volume create new_vol, and then share it into the container using the -v flag again:Дocker run -it -v new_vol:/my_files ubuntu bash The second option, a named volume, is a filesystem managed by Docker. This is very simple and convenient, but if youвЂ™re using Docker Desktop a named volume may have better performance, for reasons IвЂ™ll explain in the next section. Then the files at /users/stephen will be available at /my_files in the container, and you can read and write to them there. For example, if you runДocker run -it -v /users/stephen:/my_files ubuntu bash The first option most people encounter is the bind mount, where part of your local filesystem is shared with the container.

Both of these use the -v flag to docker run to specify some files to share with the container. So the natural next questions are, how can I see my other files? And how can my container write data that I can read later and maybe use in other containers? This is where bind mounts and volumes come in. YouвЂ™ll quickly find that (1) the container has its own filesystem, based on the filesystem in the Ubuntu image (2) you can create, delete and modify files, but your changes are local to the container and are lost when the container is deleted (3) the container doesnвЂ™t have access to any other files on your host computer. Suppose you run an Ubuntu container with docker run -it ubuntu bash.

How do I see my source code inside my container? WhatвЂ™s the difference between a volume and a bind mount? Why is file sharing slower than on Linux, and how can I speed it up? In this blog post, IвЂ™ll cover the options you have, some tips and tricks, and finish with a sneak preview of what weвЂ™re currently working on. One of the topics users of Docker Desktop often ask us about is file sharing.

Docker for mac file sharing windows#

Docker for mac file sharing mac#

Docker for mac file sharing free#

Docker for mac file sharing code#