404 with RegexRedirect

I'm migrating a very old 1.7 implementation that was doing the following:

  • Upgrade http-->https
  • Rewrite non-www to www

I've got the http-->https configured as a global redirect in traefik.yml:

    address: ":80"
          to: https
          scheme: https
    address: ":443"

...and then have the redirect on the Docker container labels as...

      - "traefik.enable=true"
      - "traefik.docker.network=traefik"
      - "traefik.http.routers.domain.rule=Host(`www.domain.io`)"
      - "traefik.http.routers.domain.entrypoints=https"
      - "traefik.http.routers.domain.tls.domains[0].main=www.domain.io"
      - "traefik.http.routers.domain.tls.domains[0].sans=domain.io"
      - "traefik.http.routers.domain.tls=true"
      - "traefik.http.routers.domain.tls.certresolver=cf"
      - "traefik.http.routers.domain.middlewares=domain"
      - 'traefik.http.middlewares.domain.redirectregex.regex=^https://domain.io/(.*)'
      - 'traefik.http.middlewares.domain.redirectregex.replacement=https://www.domain.io/$${1}'
      - "traefik.http.middlewares.domain.redirectregex.permanent=true"

Is this an ordering issue where the redirect has to happen before the HTTPS upgrade? Or what am I missing?

I can load the www.domain.io just fine - and it's bumped to TLS if I try to request via HTTP. But when I try HTTP and HTTPS of the non-www I get a 404 back.

Thanks in advance!

Ended up being a simple problem: I missed the router rule for the non-www domain.

Just had to change this line accordingly...

- "traefik.http.routers.domain.rule=Host(`www.domain.io`) || Host(`domain.io`)"

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