Some kernel parameter do not persist on OpenShift Nodes

Issue

• I've tried to set "vm.panic_on_oom" kernel parameter and make it persistent, however it keeps getting reset back to '0'.

# Add "vm.panic_on_oom = 1" into /etc/sysctl.conf
   ### Run:
# systclt -p
   ### We can see that in /etc/sysctl.conf the parameter is set:
# cat etc/sysctl.conf | grep -i oom 
vm.panic_on_oom = 1

   ### However, the panic_on_oom parameter is not set (after a reboot) 
# cat proc/sys/vm/panic_on_oom 
0

• What other parameters can't be set on OpenShift Nodes
• Can I set any of the following parameters (persistently).
  • vm/overcommit_memory
  • vm/panic_on_oom
  • kernel/panic
  • kernel/panic_on_oops