What is the best practice for upgrading the version of Traefik?
Is cross-version upgrading possible? For example, is it okay to upgrade directly from 2.7.1 to 2.11.1?
Traefik is not really an application writing data to disk like a database, which might need every step for all the migrations necessary, so it should be safe to go ahead.
Any updates in configuration due to changes in code will still be the same to be handled (v2 migration doc).