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[baseimage] kernel oom-killer to panic when the system is truly out of memory (#2988)

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- What I did
Currently when the system is under memory pressure, the OOM killer kicks in and kills a rogue process. Killing a rogue process can cause the device to be un-healthy leading to blackholing of the traffic.

To avoid this, configure the OOM to do a kernel panic which will cause the device to reboot and come back up healthy.

- How I did it
Added the sysctl variable panic_on_oom and set the value to 2.
Setting it to 2 will ensure OOM killer to always do a kernel panic.
This commit is contained in:
SuvarnaMeenakshi 2019-06-11 16:19:49 -07:00 committed by lguohan
parent 231d309b69
commit 0f665bdd06
1 changed files with 1 additions and 0 deletions
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build_debian.sh
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@ -319,6 +319,7 @@ set /files/etc/sysctl.conf/kernel.core_pattern '|/usr/bin/coredump-compress %e %
set /files/etc/sysctl.conf/kernel.softlockup_panic 1
set /files/etc/sysctl.conf/kernel.panic 10
set /files/etc/sysctl.conf/vm.panic_on_oom 2
set /files/etc/sysctl.conf/fs.suid_dumpable 2
set /files/etc/sysctl.conf/net.ipv4.conf.default.forwarding 1