Add Dockerfile

[mikesir87]

Hey there! Thanks for the fun MCP server! This PR adds a Dockerfile to allow the project to be built and distributed as a container image (following after modelcontextprotocol/servers#368).

A blog post and more is to come soon about containerized MCP servers, so stay tuned! 😄

[Flux159]

I don't think this container will work properly right now because the user won't have their kubernetes config inside of the docker container. Right now it's using the default kubeconfig: https://github.com/Flux159/mcp-server-kubernetes/blob/main/src/index.ts#L30 (generally at $HOME/.kube directory) - not having that inside of the container or binding that directory to a volume inside of the container will most likely not work properly.

[mikesir87]

Great comment! I did test it by mounting my config directory into the container and it worked as I expected. But yeah... we might want to add an example on what the container config looks like.

And to loop back... the blog post about Docker and Anthropic working together to support containerized MCP servers can be found here - https://www.docker.com/blog/the-model-context-protocol-simplifying-building-ai-apps-with-anthropic-claude-desktop-and-docker/

[Flux159]

I did test it by mounting my config directory into the container and it worked as I expected. But yeah... we might want to add an example on what the container config looks like.

Ah makes sense - yeah adding that to the README would be great. It can be a separate commit / PR though & this can just add the Dockerfile. LGTM.

[Flux159]

Just a followup here, I published flux159/mcp-server-kubernetes to dockerhub.

I haven't had the chance to test it out, but I assume that it would be loaded into Claude desktop with something like this, specifically you would need to mount your kube credentials into the docker container by mounting your $HOME/.kube directory.:

{
  "mcpServers": {
    "kubernetes": {
      "command": "docker",
      "args": ["run", "flux159/mcp-server-kubernetes", "-v", "~/.kube:/.kube"]
    }
  }
}

Will update readme after I get the chance to test it out (may take a bit since I'm working on other things) or if someone else can validate & update the README in a PR.

Note that I'm not sure if "/.kube" is the right place to mount inside of the container right now @mikesir87 - can you confirm what directory worked for you?

[slimslenderslacks]

There's an argument ordering issue above:

{
  "mcpServers": {
    "kubernetes": {
      "command": "docker",
      "args": ["run", "-v", "~/.kube:/.kube", "flux159/mcp-server-kubernetes"]
    }
  }
}

We've also been discussing how an mcp client should negotiate and get consent for the server to access a local directory like ~/.kube. I haven't verified but I think the home directory of appuser will actually be / since nothing was explicitly specified in that useradd command.