Monday, February 27, 2012

Automatically reboot server On kernel panic

There is a way to auto reboot your servers on Kernel Panic. This is helpful in a situation where your servers are remote and needs time to arrange a hard reboot.

echo X>/proc/sys/kernel/panic , where X is the timeout in seconds, The kernel waits X seconds and reboots.

e.g. echo "1" > /proc/sys/kernel/panic

Above it is 1 sec. BUT usually I keep it 10sec or more to believe that the problem was transitory.

  1. kernel.panic = 1 initiates a hard system reboot whenever the system runs into a kernel panic.
  2. kernel.panic_on_oops = 1 extends that behavior to oopses (the kernel will then treat any oops just like it treats a panic)

Thanks/-
DK

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