Windows 10: Accessing tftpd in wsl2 docker container

arcmac · Jun 25, 2020

Problem: Connect to tftpd in Docker from WSL2.

Client tftp is running inside wsl2 ubuntu

Server is tftpd-hpa running inside docker for windows started from wsl2 ubuntu

Windows firewall should be irrelevant, however it is also disabled completelty

Summary:

I can udp netcat from Alice to Bob port 69
I can tftp load a file inside Bob
When I tftp from Alite to netcat on Bob I see tftp traffic coming in
But I can not tftp load a file in Alice from Bob, connection timeout

**** ?????

Reproduction:

I installed WSL2 on Windows 10 V 2004 with Ubuntu V20.04
I installed Docker for Windows.
I installed Ubuntu V20.04 in Docker.

Two terminals, Alice is wsl2 bash, Bob is Docker bash; docker run.

Bob: nc -ul4 69

Alice: nc -u 127.0.0.1 69

-> Both can chat

Bob: start nc -ul4 69

Alice: tftp 127.0.0.1

get test.txt

-> Bob can see alice talking tftp

Bob: start tftpd-hpa with option -4

Bob: tftp 127.0.0.1

get test.txt

-> Bob can download a file from its own tftpd

Bob: start tftpd-hpa with option -4

Alice: tftp 127.0.0.1

get test.txt

-> Timeout this is unexpected

Netstat on Alice and Bob look exactly identical in both cases nc and tftpd.

Bob:

Active Internet connections servers and established

Proto Recv-Q Send-Q Local Address Foreign Address State

udp 0 0 0.0.0.0:tftp 0.0.0.0:*

Alice:

Active Internet connections servers and established

Proto Recv-Q Send-Q Local Address Foreign Address State

udp6 0 0 [::]:tftp [::]:*

Fyi: Using the internal wsl2 ip instead of 127.0.0.1 makes no difference.

Question:

Any explaination ?

Next steps:

logging I got no /var/log/messages yet and tethereal ?

Exclusions:

I will not install a linux docker inside WSL2 as this is a commercial project and not recommended

Thanks a lot, apreciated.

:)

Mikhail Batcer · Jun 25, 2020

Can't connect to Windows network services from WSL2

I have Ubuntu 18.04 running in WSL2, from which I want to connect to Docker Desktop running on Windows.

From cmd.exe I see that Docker service is listening on 127.0.0.1:2375:
Code:
C:\Windows\System32>curl 127.0.0.1:2375/info{"ID":"Z2IX:WLIX:FT2V:ZQYY:6222:M6Y6:EGZW:6D2G:EGVY:YABG:VYUM:MB2A","Containers":6,"ContainersRunning":2,"ContainersPaused":0...
But in WSL2, I got this output by `docker info`:

`ERROR: Cannot connect to the Docker daemon at tcp://127.0.0.1:2375. Is the docker daemon running?`

No connection to 127.0.0.1:2375 from WLS2:
Code:
$ curl 127.0.0.1:2375curl: (7) Failed to connect to 127.0.0.1 port 2375: Connection refused
The option "Expose daemon on tcp://localhost:2375 without TLS" is ticked.

Cluster Head · Jun 25, 2020

Create and run Hyper-V containers using Docker on Windows 10 desktop

Create and run Hyper-V containers using Docker on Windows 10 desktop

As you probably know the Windows Insider program allows to get preview Windows 10 builds to test the new features that are coming in the next major update of Windows. Since a few weeks, a new feature named Container has been included in Windows 10 preview builds. This feature brings Hyper-V containers on the desktop, natively.

There are two different kind of containers on Windows : Windows Container and Hyper-V Container. They work in the same way, instead of that Hyper-V containers are more isolated than Windows Container because they are running in a very lightweight virtual machine that provides kernel isolation and not just process isolation.

For more information about Hyper-V containers, check the official documentation on MSDN: Hyper-V Containers

You want to try it? It’s pretty simple! First, you need to enroll your machine in the Windows Insider program (see link above) and get the latest build from the insider fast ring.

Once done, just open the Turn Windows features on or off, then select Containers and Hyper-V in the list:

Click OK to install the two components and restart your computer when the installation has completed.

Now, open a PowerShell console in administrator mode. The first thing to do is to change the execution policy to unrestricted using the following command:

Set-ExecutionPolicy Unrestricted

Then you can install the ContainerImage package provider:

Install-PackageProvider ContainerImage -Force

This package provider will allow you to pull the base operating system image to run Hyper-V containers. In this case, as you are going to run Hyper-V container you need to use the NanoServer base container image. To pull this image, you have to execute the following command:

Install-ContainerImage NanoServer

Depending on your Internet connection, this step can take a while…

Once the base container image is downloaded you can install Docker on your machine to be able to run and manage containers. To do that, you can download a PS script from http://aka.ms/tp5/update-containerhost and save it on your computer. Just run this script that will install all the stuff you need: the Docker client, the Docker deamon, all the configuration, environment variables…

You can now use the Docker commands to work with Hyper-V containers! For example getting the list of available images on your computer:

To be able to use this image without specifying its tag you can tag it as the latest image using the docker tag command:

Now you can switch to a CMD window, with administrator rights and create a new Hyper-V container use the following command:

docker run -it –isolation=hyperv nanoserver cmd

After a few seconds you will be running in an Hyper-V container!

You’re done Smile You can now run any Hyper-V container on your Windows 10 computer. Do you like it?

If you have any question about this post or running containers on Windows, feel free to contact me on Twitter @jcorioland

Julien
Click to expand...

Source: https://blogs.msdn.microsoft.com/jco...ws-10-desktop/

Uday Kiran Reddy · Jun 25, 2020

How to use visual studio in Docker

Our source code contains dependency for w:\ drive.

Because of which, multiple releases can't be build on the same machine.

So, is there any option to use visual studio with a docker container, so that we can build multiple releases paralelly.

Any other solution also please suggest.

Changing our source code is not a valid option, please don't raise on a discussion on this.

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