Kernel Parameter on AWS EC2

Malcolm Corney m.corney at
Mon Jul 11 05:09:42 CEST 2016

I have included the steps below for what I did to enable cgroups on an Amazon EC2 instance.  The instructions are for “saucy” but “saucy” can be replaced with whichever version of Debian/Ubuntu you are running.  Hopefully this will work for you as well.


The information comes from:

Malcolm Corney


Alter Boot to allow GRUB loader for CGroups - Required for Amazon Web Services EC2 Instance


sudo -s

apt-get update

apt-get purge linux-image-*

apt-get install linux-image-generic-lts-saucy linux-headers-generic-lts-saucy


# setup kexec to actually run the kernel you chose w/ the GRUB_CMDLINE options

vi /etc/default/grub 

GRUB_CMDLINE_LINUX="cgroup_enable=memory swapaccount=1"


vi /etc/init.d/rcS 

*** Add

if grep -qv ' kexeced$' /proc/cmdline ;then

   kexec --load /vmlinuz --initrd=/initrd.img --append='root=LABEL=DOROOT cgroup_enable=memory swapaccount=1 kexeced' &&

   mount -o ro,remount / &&

   kexec -e



echo "net.ipv4.ip_forward=1" > /etc/sysctl.d/docker.conf

apt-get install kexec-tools

dpkg-reconfigure kexec-tools #yes/yes


# install docker (despite the old package name, lxc is optional as of 0.90)

apt-get install docker cgroup-lite lxc


# libcontainer is default, but im still running lxc for now

vi /etc/default/docker 

DOCKER_OPTS="-e lxc"




From: DOMjudge-devel [mailto:domjudge-devel-bounces at] On Behalf Of Myungwoo Chun
Sent: Sunday, 10 July 2016 9:29 PM
To: domjudge-devel at
Subject: Kernel Parameter on AWS EC2




I want to enable cgroups for Java memory issues and running multiple judgedaemons in AWS EC2 Ubuntu 14.04 Server instance.


However, I can't add "quiet cgroup_enable=memory swapaccount=1" since AWS EC2 doesn't use grub.


Is there any method to add kernel parameters to AWS EC2 instance?



Myungwoo Chun

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