add commandlets for docker and kubernetes

[hohwille]

As a user of devonfw-ide, I want to have docker and kubernetes support so that I can automate this for my team and can easily write scripts that work cross-platform using docker and kubernetes.

Acceptance

• devon docker setup will install docker. If docker is already installed on my machine, it will notice and honor the existing installation.
• devon kubernetes setup will install kubernetes. If kubernetes is already installed on my machine, it will notice and honor the existing installation.

[hohwille]

Notice for MacOS:

• Installation: https://docs.docker.com/docker-for-mac/install/
• We could add support for MacOS that:
  • detects architecture (intel vs. apple CPU)
  • downloads the latest release for the detected architecture
  • opens the downloaded release (on MacOS that is a dmg file that is actually a virtual disc image that then gets mounted)
  • instruct the user with the required manual steps (go to the mounted disc drive and drag&drop the docker app to the applications folder, then launch docker from launchpad)

[hohwille]

Easy to detect architecture on macos:

uname -m
x86_64

[hohwille]

Was autoclosed by PR #570. I will reopen to add support for MacOS.

Any linux user of devonfw-ide available who could assist for linux support?
https://docs.docker.com/engine/install/ubuntu/

[hohwille]

For windows network issues with VPN see:
https://github.com/sakai135/wsl-vpnkit

[hohwille]

was autoclosed by PR #593 hence reopening as not yet done.

[hohwille]

Docker Desktop is not available for Linux. However, I also found this one that supports all 3 OS:
https://dockstation.io/

Anybody experience with this tool?
I personally like Docker Desktop on MacOS and can recommend it. I have not yet used DockStation at all.

[hohwille]

Minimal system requirement:
Docker for Windows v1.12.0+
Docker Compose v1.6.0+
Windows 10 Pro (64bit)
Microsoft Hyper-V

Does not really seem to be state-of-the-art and what we are looking for. Maybe an optional aspect to close the Linux UI gap.

[hohwille]

• https://www.upnxtblog.com/index.php/2018/01/17/top-6-gui-tools-for-managing-docker-environments/
• https://medium.com/@dockstation/a-brief-comparison-of-gui-docker-tools-46bd6a24ae31

Looks to me as if we could link such articles from the docs and let the linux user decide if he needs UI and which one to choose. We can still make a suggestion as best practice but I do not see that we need to automate this or even enforce the decision.

[hohwille]

From PR #593 for Linux:

I feel we should support Debian and Ubuntu, nothing more. These are the most often used ones by users... For sure we can wait for contributions to support more if there are people who want to support more.
Nevertheless, I fully agree that we have to make it transparent. ... which checks for the current distribution installed. If a distribution is not supported, it should give a proper error message

So for Linux we need to automate and script:

• Debian: https://docs.docker.com/engine/install/debian/
• Ubuntu: https://docs.docker.com/engine/install/ubuntu/

[hohwille]

For the record:
To test our initial approach I followed the instructions and recommendations from Microsoft to setup WSL 2 manually. I therefore connected my Microsoft account on my Windows Machine and joined the Insider Program. As a result my Laptop was upgraded to Windows 11. Since then my Latop crashes ~ every hour and is not really usable anymore. Microsoft also does not support an easy way back to downgrade without loosing your installed software. So it is really not an option to give this instructions to our developers.

[hohwille]

Moving tasks from PR #594:

• we need to properly test this new approach
• we should test for VPN issues and if needed automatically install https://github.com/sakai135/wsl-vpnkit as well. On MacOS this is not needed and it seems to work for me with AnyConnect. However, we might need some docker & k8s power-users to test this and give feedback from more advanced and daily usage. Maybe nothing has to be done anymore as Docker Desktop claims to solve this: https://docs.docker.com/docker-for-windows/networking/#features - also I found this: Cannot access the VPN network inside a container docker/for-mac#2820 (comment)

[hohwille]

Once again reopening from PR auto-close.