Traefik redirect / (root) to sub path with Docker labels

traefik-redirect-path.md

Traefik: redirect base or root path to a subpath

This is tested with Traefik 1.7

This is how to redirect the root or base path to a sub path in Traefik using Docker labels:
Goals

• https://example.com -> https://example.com/abc/xyz/
• https://example.com/ -> https://example.com/abc/xyz/
• https://example.com/something -> no redirect

We will match <begin of line>https://<any chars but not slash AS group1><slash or nothing><end of line>
and replace it with https://<group1>/abc/xyz/.
In regex we have to escape a / character by \/. In docker-compose labels we need to escape again, so that it becomes \\\\/.
We also need to escape $ to $$ because of docker-compose.

labels:
  - "traefik.frontend.rule=Host:example.com"
  - "traefik.frontend.redirect.regex=^https:\\\\/\\\\/([^\\\\/]+)\\\\/?$$"
  - "traefik.frontend.redirect.replacement=https://$$1/abc/xyz/"
  - "traefik.port=80"
  - "traefik.enable=true"

anyone got it working for v3? It does an infinite redirect loop

I had the same issue and spent pretty much a whole day to figure it out.
Simple redirect from my root directory to /de (or other subfolder whatsoever)

Valid for my-domain.com and www.my-domain.com, http and https.

For me, in my environment, self-hosted on coolify, this worked:

traefik.http.middlewares.redirect-to-de.redirectregex.regex=^(https?://(?:www\.)?my-domain\.com)/?$$
traefik.http.middlewares.redirect-to-de.redirectregex.replacement=$${1}/de

and the redirect-to-de middleware has to be added to each router. The full config is in my case:

traefik.enable=true
traefik.http.middlewares.gzip.compress=true
traefik.http.middlewares.redirect-to-https.redirectscheme.scheme=https
traefik.http.middlewares.redirect-to-de.redirectregex.regex=^(https?://(?:www\.)?my-domain\.com)/?$$
traefik.http.middlewares.redirect-to-de.redirectregex.replacement=$${1}/de
traefik.http.middlewares.redirect-to-de.redirectregex.permanent=true
traefik.http.routers.http-0-mycontainer.entryPoints=http
traefik.http.routers.http-0-mycontainer.middlewares=redirect-to-https,redirect-to-de
traefik.http.routers.http-0-mycontainer.rule=Host(`my-domain.com`) && PathPrefix(`/`)
traefik.http.routers.http-0-mycontainer.service=http-0-mycontainer
traefik.http.routers.http-1-mycontainer.entryPoints=http
traefik.http.routers.http-1-mycontainer.middlewares=redirect-to-https,redirect-to-de
traefik.http.routers.http-1-mycontainer.rule=Host(`www.my-domain.com`) && PathPrefix(`/`)
traefik.http.routers.http-1-mycontainer.service=http-1-mycontainer
traefik.http.routers.https-0-mycontainer.entryPoints=https
traefik.http.routers.https-0-mycontainer.middlewares=gzip,redirect-to-de
traefik.http.routers.https-0-mycontainer.rule=Host(`my-domain.com`) && PathPrefix(`/`)
traefik.http.routers.https-0-mycontainer.service=https-0-mycontainer
traefik.http.routers.https-0-mycontainer.tls.certresolver=letsencrypt
traefik.http.routers.https-0-mycontainer.tls=true
traefik.http.routers.https-1-mycontainer.entryPoints=https
traefik.http.routers.https-1-mycontainer.middlewares=gzip,redirect-to-de
traefik.http.routers.https-1-mycontainer.rule=Host(`www.my-domain.com`) && PathPrefix(`/`)
traefik.http.routers.https-1-mycontainer.service=https-1-mycontainer
traefik.http.routers.https-1-mycontainer.tls.certresolver=letsencrypt
traefik.http.routers.https-1-mycontainer.tls=true
traefik.http.services.http-0-mycontainer.loadbalancer.server.port=80
traefik.http.services.http-1-mycontainer.loadbalancer.server.port=80
traefik.http.services.https-0-mycontainer.loadbalancer.server.port=80
traefik.http.services.https-1-mycontainer.loadbalancer.server.port=80