[receiver/dockerstatsreceiver] Does not support setting TLS settings

[moserke]

Component(s)

receiver/dockerstats

What happened?

Description

In trying to set up a receiver for a TLS protected containerd daemon over a docker socket, can not set TLS settings and therefore get malformed http responses. Because you can't specify the scheme in the unix socket name the net/http layer assumes http protocol.

You can see this in the error output of

"http://containerd.sock/v1.25/containers/json?filters=%7B%22status%22%3A%7B%22running%22%3Atrue%7D%7D": net/http: HTTP/1.x transport connection broken: malformed HTTP response "\x00\x00\x06\x04\x00\x00\x00\x00\x00\x00\x05\x00\x00@\x00".
* Are you trying to connect to a TLS-enabled daemon without TLS?

Can you actually do this or is this something that is not supported today?

Collector version

0.102.1

Environment information

Environment

OS: (e.g., "Ubuntu 20.04")
Compiler(if manually compiled): (e.g., "go 14.2")

OpenTelemetry Collector configuration

docker_stats:
  endpoint: unix://containerd.sock

Log output

No response

Additional context

No response

[github-actions]

Pinging code owners:

• receiver/dockerstats: @rmfitzpatrick @jamesmoessis

See Adding Labels via Comments if you do not have permissions to add labels yourself.

[github-actions]

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Pinging code owners:

• receiver/dockerstats: @rmfitzpatrick @jamesmoessis

See Adding Labels via Comments if you do not have permissions to add labels yourself.

[jamesmoessis]

@moserke I would be happy to review if you raise a PR for this. I am assuming this would only apply if the daemon is done over TCP, not unix socket?