Bringing up new containers will always take a finite amount of time. If all of a cluster is deployed to a single host, and that host dies, then the recovery ti

Bringing up new containers will always take a finite amount of time. If all of a cluster is deployed to a single host, and that host dies, then the recovery time is the time needed to reschedule the container elsewhere, load it onto the machine (if not cached), and execute it. This is all downtime, since every instance was lost. If instances are on more than one host, then even in the case of a single host's failure the application is still available while the failed instance is rescheduled and started.