I have the micro cluster on GCloud running smallest imaginable Node.js application.

Eventhough app is going down all the time. Here is output of kubernate describe pod:

Events:
  Type     Reason            Age               From               Message
  ----     ------            ----              ----               -------
  Warning  FailedScheduling  1m (x2 over 1m)   default-scheduler  0/3 nodes are available: 1 Insufficient cpu, 2 node(s) were not ready, 2 node(s) were out of disk space.
  Warning  FailedScheduling  55s (x9 over 2m)  default-scheduler  0/3 nodes are available: 1 node(s) were not ready, 1 node(s) were out of disk space, 2 Insufficient cpu.

I suspect maybe there is some garbage left from previous versions of an app. How can I check what causes problems and get rid of unnecessary processes and data?