I was able to set the RGW credentials for the dashboard! Here are the steps I followed:
Run radosgw-admin user info --uid=dashboard | less to find the access and secret keys for the user I'd already created
Save the access key value to...
I'm trying to get RGW working on Proxmox too. If anyone else has any insights or resources they can link to, I'd appreciate it.
Stuff I've tried
Here's some of what I've learned and tried. Some of this was sourced from other posts in the forum...