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simple traefik v3.x deployment with docker compose example

For a sample traefik v2.x deployment see branch 'traefik2'.

This example runs traefik as root with the docker socket mounted into the container to keep this example simple. Doing this is not a good security practise. Be warned and know what you do!

For an hardened traefik v2 example see wollomatic/traefik2-hardened.

What to do before using this example:

  • chmod 600 config/acme.json
  • docker-compose.yaml: change hostname 'foobar.example.invalid' to your real hostname
  • docker-compose.yaml: change basic auth password!! (see comments in file)
  • config/traefik.yaml: change email address
  • open each file, check it by yourself and understand what it does
  • create a docker network named 'traefik-servicenet' (docker network create traefik-servicenet)

migrating traefik v2 to v3

see https://doc.traefik.io/traefik/v3.0/migration/v2-to-v3/

Migrating vom traefik v2 to v3 is quite simple, yet there are some changes to be aware of:

  • Router configuration Host(\foo.example.invalid`,`bar.example.invalid`)is nowHost(`foo.example.invalid`) || Host(`bar.example.invalid`)`
  • Regexp syntax has changed. See https://doc.traefik.io/traefik/v3.0/migration/v2-to-v3/#matchers
  • Because content type auto detection is now disabled by default, you have to add the middleware ContentType to make the dashboard and other services work again.
  • Since http3 is now enabled by default, you must remove the http3 entry from the experimental section of the traefik config file.