Cockpit is the modern Linux admin interface. We release regularly. Here are the release notes from version 175:
http://cockpit-project.org/blog/cockpit-175.html
Summary: - Storage: Key management for encrypted devices
You can get Cockpit here:
http://cockpit-project.org/running.html
Cockpit 175 is available in Fedora 28:
https://bodhi.fedoraproject.org/updates/cockpit-175-1.fc28
Or download the tarball here:
cockpit-devel@lists.fedorahosted.org