Kernel Parameter on AWS EC2

Myungwoo Chun mc.tamaki at gmail.com
Mon Jul 11 15:12:38 CEST 2016


Thank you, Keith!
Solution you told me is what I absolutely want. Now cgroups are enabled
well in my EC2 instance.

Thank you,
Myungwoo Chun

On Mon, Jul 11, 2016 at 9:35 PM, Keith Johnson <kjohns07 at fit.edu> wrote:

> Those steps aren’t required at all and are overly complicated/not
> relevant. They look to target digitalocean which is a whole different
> thing. AWS does use grub, it’s just a different config file you need to
> edit than usual. Changing the kernel boot parameters on AWS for the
> official Ubuntu images is just as simple as editing
> /etc/default/grub.d/50-cloudimg-settings.cfg in the same way you’d usually
> edit /etc/default/grub. Note that you have to run ‘update-grub’ afterwards
> and then reboot. This assumes you’re using one of the hvm images and not
> one of the pv images.
>
>
>
> If you have any other trouble getting things to work with AWS let me know,
> I have quite a bit of experience with running DOMjudge on it.
>
>
>
> *From:* DOMjudge-devel [mailto:domjudge-devel-bounces at domjudge.org] *On
> Behalf Of *Malcolm Corney
> *Sent:* Monday, July 11, 2016 4:11 AM
> *To:* 'Myungwoo Chun' <mc.tamaki at gmail.com>
> *Cc:* domjudge-devel at domjudge.org
> *Subject:* RE: Kernel Parameter on AWS EC2
>
>
>
> 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 at gmail.com <mc.tamaki at gmail.com>]
> *Sent:* Monday, 11 July 2016 2:34 PM
> *To:* m.corney at tpg.com.au
> *Cc:* domjudge-devel at 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 at 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 at domjudge.org] *On
> Behalf Of *Myungwoo Chun
> *Sent:* Sunday, 10 July 2016 9:29 PM
> *To:* domjudge-devel at 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
>
>
>
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