Docker – Debian – Kernel panick – Automatic restart

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Problem

You have a remote server (Debian) running some Docker containers and you want to make sure that they all restart in the event of a kernel panick.

solution

  • Add an automatic restart after a kernel panick by running: 
    sysctl kernel.panic=20
  • Emulate a kernel panick by running the following (SysRq more info here : 
    echo c > /proc/sysrq-trigger
  • Check that the containers have restarted again with docker ps (NOTE: the containers should have been enabled to autorestart)