Docker for Windows 17.11 with Windows 10 Fall Creators Update

#1

Post by sz4kerto » Sat, Nov 25, 2017, 2:19 PM UTC

Docker for Windows 17.11 with Windows 10 Fall Creators Update
blog.docker.com

Re: Docker for Windows 17.11 with Windows 10 Fall Creators Update

#2

Post by carlsborg » Sat, Nov 25, 2017, 2:31 PM UTC

Docker for Windows already runs Linux containers. This is an update: "The setup for running Linux containers with LCOW is a lot simpler than the previous architecture where a Hyper-V Linux VM runs a Linux Docker daemon, along with all your containers. With LCOW, the Docker daemon runs as a Windows process (same as when running Docker Windows containers), and every time you start a Linux container Docker launches a minimal Hyper-V hypervisor running a VM with a Linux kernel, runc and the container processes running on top."

Re: Docker for Windows 17.11 with Windows 10 Fall Creators Update

#3

Post by sz4kerto » Sat, Nov 25, 2017, 2:44 PM UTC

carlsborg wrote: post #2

Docker for Windows already runs Linux containers. This is an update: "The setup for running Linux containers with LCOW is a lot simpler than the previous architecture where a Hyper-V Linux VM runs a Linux Docker daemon, along with all your containers. With LCOW, the Docker daemon runs as a Windows process (same as when running Docker Windows containers), and every time you start a Linux container Docker launches a mi…

This is a major update as now the Docker daemon runs as a Windows process, not as a Linux process. One VM/container is also a huge change. Before this, you had to manage a single VM that runs all the containers, allocate memory and CPU for that whole VM, assign Hyper-V virtual switch(es) to that VM.

Basically this intends to bring Linux containers to Windows Server.

Re: Docker for Windows 17.11 with Windows 10 Fall Creators Update

#4

Post by Dolores12 » Sat, Nov 25, 2017, 3:44 PM UTC

carlsborg wrote: post #2

Docker for Windows already runs Linux containers. This is an update: "The setup for running Linux containers with LCOW is a lot simpler than the previous architecture where a Hyper-V Linux VM runs a Linux Docker daemon, along with all your containers. With LCOW, the Docker daemon runs as a Windows process (same as when running Docker Windows containers), and every time you start a Linux container Docker launches a mi…

any idea what host windows OS are supported? I suppose only those with hyper-v.

Re: Docker for Windows 17.11 with Windows 10 Fall Creators Update

#5

Post by atmosx » Sat, Nov 25, 2017, 3:46 PM UTC

Dolores12 wrote: post #4

carlsborg wrote: post #2

Docker for Windows already runs Linux containers. This is an update: "The setup for running Linux containers with LCOW is a lot simpler than the previous architecture where a Hyper-V Linux VM runs a Linux Docker daemon, along with all your containers. With LCOW, the Docker daemon runs as a Windows process (same as when running Docker Windows containers), and every time you start a Linux container Docker launches a mi…

any idea what host windows OS are supported? I suppose only those with hyper-v.

Exactly, you can't emulate another OS without a hypervisor.

Re: Docker for Windows 17.11 with Windows 10 Fall Creators Update

#6

Post by codeman1181 » Sat, Nov 25, 2017, 3:46 PM UTC

So I have 2 questions still:

- On a windows server can I run a Linux container?

- On Windows server can I run a Windows container and a Linux container side by side?

Re: Docker for Windows 17.11 with Windows 10 Fall Creators Update

#7

Post by cjcampbell » Sat, Nov 25, 2017, 3:49 PM UTC

Dolores12 wrote: post #4

carlsborg wrote: post #2

Docker for Windows already runs Linux containers. This is an update: "The setup for running Linux containers with LCOW is a lot simpler than the previous architecture where a Hyper-V Linux VM runs a Linux Docker daemon, along with all your containers. With LCOW, the Docker daemon runs as a Windows process (same as when running Docker Windows containers), and every time you start a Linux container Docker launches a mi…

any idea what host windows OS are supported? I suppose only those with hyper-v.

I’m looking for the same answer. I expect you are right, as the MS article linked does talk about some Hyper-V capabilities leveraged by LinuxKit (even though MobyLinux is no longer running as a HyperV VM).

Re: Docker for Windows 17.11 with Windows 10 Fall Creators Update

#8

Post by pedro2 » Sat, Nov 25, 2017, 3:50 PM UTC

I was expecting LCOW to not need Hyper-V at all and to use Windows' WSL.

I thought it was the whole point behind WSL -- to beta-test Linux containers support without the need for virtualization.

Re: Docker for Windows 17.11 with Windows 10 Fall Creators Update

#9

Post by cjcampbell » Sat, Nov 25, 2017, 3:53 PM UTC

codeman1181 wrote: post #6

So I have 2 questions still: - On a windows server can I run a Linux container? - On Windows server can I run a Windows container and a Linux container side by side?

From my read, the side-by-side feature is a soon but not quite yet (on Win10 or Server 2016). Looks like the groundwork is prepared though there are some features that aren’t fully implemented yet.

Re: Docker for Windows 17.11 with Windows 10 Fall Creators Update

#10

Post by cjcampbell » Sat, Nov 25, 2017, 4:00 PM UTC

pedro2 wrote: post #8

I was expecting LCOW to not need Hyper-V at all and to use Windows' WSL. I thought it was the whole point behind WSL -- to beta-test Linux containers support without the need for virtualization.

Hyper-V virtualization requirements are removed with this update. It does rely on Hyper-V isolation, which appears to have more in common with Linux namespaces than virtualization.

Virtualization isn’t completely off the table. The article mentions a minimal, LinuxKit-based hypervisor. I may be off, but I’m imagining something more akin to what’s happening on macOS via HyperKit.