I’m not sure what you mean by: ** In above step I choose replace menu.lst ** You are correct about not requiring: *** Add http://ubergarm.github.io/ (** I'm not sure I need to add this line **) I must have left that there as the source of my information – apologies. Yes, reboot is required. From: Myungwoo Chun [mailto:mc.tamaki@gmail.com] Sent: Monday, 11 July 2016 2:34 PM To: m.corney@tpg.com.au Cc: domjudge-devel@domjudge.org Subject: Re: Kernel Parameter on AWS EC2 Thank you for fast reply. But I don't solve the problem with this. I have several questions about the solution. Please check parts below which I wrap with ** **. My instance is Ubuntu 14.04.03 LTS (trusty). =========================================================================================== sudo -s apt-get update apt-get purge linux-image-* apt-get install linux-image-generic-lts-trusty linux-headers-generic-lts-trusty ** In above step I choose replace menu.lst ** # 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 http://ubergarm.github.io/ (** I'm not sure I need to add this line **) if grep -qv ' kexeced$' /proc/cmdline ;then kexec --load /vmlinuz --initrd=/initrd.img --append='root=LABEL=DOROOT cgroup_enable=memory swapaccount=1 kexeced' && mount -o ro,remount / && kexec -e fi echo "net.ipv4.ip_forward=1" > /etc/sysctl.d/docker.conf apt-get install kexec-tools dpkg-reconfigure kexec-tools #yes/yes # install docker (despite the old package name, lxc is optional as of 0.90) apt-get install docker cgroup-lite lxc # libcontainer is default, but im still running lxc for now vi /etc/default/docker (** At this step, /etc/default/docker is not existed **) DOCKER_OPTS="-e lxc" ** And then I reboot the instance ** =========================================================================================== After the rebooting, output of "cat /proc/cmdline" is === BOOT_IMAGE=/boot/vmlinuz-3.13.0-91-generic root=UUID=736fad7a-387f-4420-b934-4ccbafa26d16 ro console=tty1 console=ttyS0 crashkernel=384M-:128M === Thank you, Myungwoo Chun On Mon, Jul 11, 2016 at 12:09 PM, Malcolm Corney <m.corney@tpg.com.au> wrote: I have included the steps below for what I did to enable cgroups on an Amazon EC2 instance. The instructions are for “saucy” but “saucy” can be replaced with whichever version of Debian/Ubuntu you are running. Hopefully this will work for you as well. The information comes from: https://gist.github.com/ubergarm/9695532 http://ubergarm.github.io/ Malcolm Corney Alter Boot to allow GRUB loader for CGroups - Required for Amazon Web Services EC2 Instance ============================================================================================= sudo -s apt-get update apt-get purge linux-image-* apt-get install linux-image-generic-lts-saucy linux-headers-generic-lts-saucy # setup kexec to actually run the kernel you chose w/ the GRUB_CMDLINE options vi /etc/default/grub GRUB_CMDLINE_LINUX="cgroup_enable=memory swapaccount=1" vi /etc/init.d/rcS *** Add http://ubergarm.github.io/ if grep -qv ' kexeced$' /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 fi 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@domjudge.org] On Behalf Of Myungwoo Chun Sent: Sunday, 10 July 2016 9:29 PM To: domjudge-devel@domjudge.org Subject: Kernel Parameter on AWS EC2 Hi, 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? Thanks, Myungwoo Chun