[v3] Support the traefik.http.*.tls.passthrough label again

[TheDevMinerTV]

Welcome!

• Yes, I've searched similar issues on GitHub and didn't find any.
• Yes, I've searched similar issues on the Traefik community forum and didn't find any.

What did you do?

1. Start a container that uses the passthrough label (like it used to work in v2)

      - traefik.http.routers.acme.tls.passthrough=true

2. Look at the logs

The field is also not mentioned here: https://doc.traefik.io/traefik/v3.0/routing/providers/docker/#routers but looking at "old" community posts this used to work: https://community.traefik.io/t/do-not-route-tls-passthrough-to-backend-service-with-docker-provider/17380/4

What did you see instead?

2024-03-09T21:20:39Z ERR github.com/traefik/traefik/v3/pkg/provider/docker/config.go:45 > error="field not found, node: passthrough" container=*** providerName=docker

What version of Traefik are you using?

3.0.0-rc1

What is your environment & configuration?

Docker provider

If applicable, please paste the log output in DEBUG level

2024-03-09T21:20:39Z DBG github.com/traefik/traefik/v3/pkg/provider/docker/pdocker.go:111 > Provider event received {Status:health_status: healthy ID:48d19c05ec4cfebee5825a4d91e3673910a3e7f7a2cae53253b4f54cf664e56d From:*** Type:container Action:health_status: healthy Actor:{ID:*** Attributes:map[com.docker.compose.config-hash:*** com.docker.compose.container-number:1 com.docker.compose.depends_on: com.docker.compose.image:sha256:*** com.docker.compose.oneoff:False com.docker.compose.project:*** com.docker.compose.project.config_files:***/compose.yml com.docker.compose.project.working_dir:*** com.docker.compose.replace:*** com.docker.compose.service:*** com.docker.compose.version:2.24.2 image:***:*** traefik.enable:true traefik.http.routers.***.entrypoints:websecure traefik.http.routers.***.rule:Host(`***.devminer.xyz`) traefik.http.routers.***.tls:true traefik.http.routers.***.tls.passthrough:true]} Scope:local Time:1710019239 TimeNano:1710019239778373413} providerName=docker

[TheDevMinerTV]

Never mind, I was looking at HTTP stuff but I need TCP