With this Scripts I got it running now. https://github.com/GluuFederation/community-edition-setup/tree/master/static/scripts/change_hostname
I can Login to oxTrust and all Data is available, but
SAML Login is not working at the moment.
I've checked the logs for imformation but nothing is logged there.
The Error Message is: "HTTP ERROR: 503 Problem accessing /idp/profile/SAML2/POST/SSO. Reason: Service Unavailable"
service "idp" is running and there are now error logs as sayed.