Random 1: Traefik blocks CORS by Default

This is the first of a new series of really short blog posts that will touch on random things. Things I discover during my day-to-day activities.

I recently discovered that traefik (v2.9 at the time of this writing), blocks CORS requests by default. This issue can quickly be resolved by adding the right labels:

 - "traefik.http.middlewares.testheader.headers.accesscontrolallowmethods=*"
 - "traefik.http.middlewares.testheader.headers.accesscontrolallowheaders=*"
 - "traefik.http.middlewares.testheader.headers.accesscontrolalloworiginlist=*"

You can checkout more configurations options here