I’m also using ansible everywhere in my home / private infra and lab. Occasionally I get slightly annoyed that I have to open an inventory file or a role var to find something. But in general I’m so grateful that there is one place to find this information, and the same is used to set up everything from scratch.
Is it extra work to write the roles and playbooks? Yes. Does it solve the documentation and automation problem completely? Absolutely. 10/10 would recommend. And for the record, most things I host run on containers, but the volumes and permission management alone make it worth your time.
I use Traefik because it solved a problem with the static configuration approach which Nginx had / still has.
In a scenario with multiple services behind Nginx, taking one down or replacing an instance is massive headache. I tried to script around it, but basically the Nginx container would choke on the fact that a service does not [yet / anymore] exist, and together with the docker networking stack it turned out to be an insurmountable problem.
Traefik otoh discovers services based on (in my case) labels on the docker containers running locally. And then updates the configuration on the fly.
Basically the static approach to configuration resulted in massive headache when I needed to enable zero downtime deployments and updates behind Nginx. And Traefik handled it perfectly without dropping a single request.
Nowadays I manage my dynamic configuration with ansible and update the values in for the file-based configuration provider with a playbook. I don’t need a UI to manage my inventory, I use ansible for that. Traefik handles the rest perfectly.