I'm not sure to understand.
- XOA and Docker? XOA is not available in a container, it's a Debian based virtual appliance. What are you using?
- There is a plugin to do that. Have you read our official doc? https://xen-orchestra.com/docs/backup_reports.html
- I'm using the Xen Orchestra Community Version in this Docker-Container: https://hub.docker.com/r/ezka77/xen-orchestra-ce
And therefore I thought about an possibility to monitor this Docker-Container and in an DR-Case to get it working asap on an other VM.