Conext - LXD Control Panel
Found this interesting project. Extremely new, haven't tried it out yet, but looks quite appealing for potentially replacing a manual Ubuntu/LXD/HaProxy setup, as it has web proxy/letsencrypt integration in the panel.
From the description:
A decentralized multi-server LXD server control panel with sugar! Features Not going to bore you with stuff you probably won't read, so here is what the system can do: Responsive single page app control panel. Full LXD management, including: profiles, containers, images, certificates, networks, storage and devices. Server information, host CPU, memory, disks network connections and processes. Built-in Web Proxy with LetsEncrypt, to forward HTTP/s traffic into the containers or external upstream's. Create custom tasks for maintaining containers or project deployments. Create simple API endpoints for stuff the panel does not do, with access to your LXD servers over RPC.