Is it safe to drain nodes where the 3scale containers are deployed?

Issue

• Is it safe to drain nodes where the 3scale containers are deployed?
• oc adm drain $NODE failed because system-sidekiq and system-sphinx container uses emptyDIr.

system-sidekiq

  volumes:
  - emptyDir:
      medium: Memory
    name: system-tmp

system-sphinx

  volumes:
  - emptyDir: {}
    name: system-sphinx-database