I am following this guide and have configured everything like in the guide. When I try something like glance image-list, I get

Authorization Failed: [Errno 104] Connection reset by peer

As I am new to openstack, I am not quite sure how to debug this. Whom is glance connecting to, keystone, or the mysql database? If its keystone, how can I check which credentials glance is using (I guess the ones provided in /etc/glance/glance-api.conf and /etc/glance/glance-registry.conf ?) How can I check the credentials with the verifyer directly? ... any hints would be appreciated.

I also found:

# keystone user-list
WARNING: Bypassing authentication using a token & endpoint (authentication credentials are being ignored).
[Errno 104] Connection reset by peer

Maybe there is a connection to the glance authorization error?