Add Fedora 43 test container with supervisord-managed Check_MK agent

[Copilot]

Adds containerized testing environment for Check_MK agent on Fedora 43. Agent listens on port 6556 via supervisord without xinetd dependency.

Implementation

• Dockerfile_fedora-43: Fedora 43 base, installs supervisor + nmap-ncat, uses netcat wrapper for TCP listener on 6556
• check_mk_agent.linux: Official Check_MK agent v2.3.0 from upstream repository
• supervisord-checkmk.conf: Externalized process config with auto-restart, runs as root for system access
• README_Dockerfile_fedora-43.md: Build and usage instructions

Usage

docker build -f Dockerfile_fedora-43 -t fedora43-checkmk .
docker run -d -p 6556:6556 fedora43-checkmk
echo | nc localhost 6556  # Test agent output

Architecture: supervisord → check_mk_agent_tcp wrapper → netcat listener → check_mk_agent script

Original prompt

On Dockerfile_fedora-43, Hey - please create me a Dockerfile for Fedora 43, which does not include xinetd, but I need the check_mk_agent to be running. Are you able to extend the Dockerfile with somethng like supervisord, so I can run check_mk_agent listening to port 6556 in the container for testing purposes?

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[HenriWahl]

Please use the rpm file supplied in this repo

[HenriWahl]

can't supervisord be listening too? do we need netcat?

[HenriWahl]

Because if we use netcat there will be no need to run supervisor at all?