Dokku maintainer here. Dokku does scale past a single node - you can use our kubernetes or nomad plugin for that. Regarding "it randomly go down multiple time

Dokku maintainer here. Dokku does scale past a single node - you can use our kubernetes or nomad plugin for that. Regarding "it randomly go down multiple times", I am quite curious as to what the causes here were. Instance reboots cause containers to lose IP addresses (thats a docker limitation) and upgrades of Docker Engine do the same. Outside of that, unless your app crashed due to memory constraints or bugs in code, Dokku shouldn't really touch them. It merely starts containers and lets the docker daemon keep them up. If you have any info on the issues, I'd be happy to investigate.