Metrics proxy should be implemented as a separate command

[skitt]

The metrics proxy is currently implemented as a direct invocation of nc:

/usr/bin/nc -v -lk -p <hostport> -e nc <nodeip> <podport>

This relies on a specific version of nc, specifically Busybox nc and its handling of -e. Alternate nettest container images based on platforms with different versions of nc handle this differently.

The proxy should be implemented as a separate command, possibly as simple as a shell script (see simpleserver), so that it can be adapted externally for different container images.

Depends on submariner-io/shipyard#1046

[stale]

This issue has been automatically marked as stale because it has not had activity for 60 days. It will be closed if no further activity occurs. Please make a comment if this issue/pr is still valid. Thank you for your contributions.

[github-actions]

This PR/issue depends on:

• The metrics proxy server should be implemented as a shell script in the nettest image shipyard#1046
  By Dependent Issues (🤖). Happy coding!