Docker on Debian 8
There is a potential for broken software after this upgrade as we are moving to a non-stable kernel (in regards to mainline Debian). Please take backups and only proceed if you are comfortable with this process.
To begin with, we're going to install docker just like we would for any other OS by following Docker's official documentation for Debian.
Once you've done that, if you run
docker info you'll notice some missing features at the bottom, something
like the output below.
WARNING: No memory limit support WARNING: No swap limit support WARNING: No kernel memory limit support WARNING: No oom kill disable support WARNING: No cpu cfs quota support WARNING: No cpu cfs period support
Update GRUB Startup
To fix the memory limit support issues, we just need to add two arguments to our default grub startup. Start by
/etc/default/grub and adding the following arguments to
The line should then look like the one below — assuming nothing else was in the quote to begin with.
After doing that, run
sudo update-grub to update our grub configuration.
Add Backports Repo
We then need to enable the
jessie-backports apt repository to install a newer kernel. To do this, run the commands below.
echo deb http://http.debian.net/debian jessie-backports main > /etc/apt/sources.list.d/jessie-backports.list echo deb http://http.debian.net/debian jessie-backports main contrib non-free > /etc/apt/sources.list.d/jessie-backports.list sudo apt update
To find the most recent kernels, run
apt-cache search linux-image which will list all of the ones available. In this
case, we'll install the
4.9.0 kernel using the command below. Once we've done that, it is time to reboot the server
to start using this kernel.
apt install -t jessie-backports linux-image-4.9.0-0.bpo.3-amd64 reboot
Update Software & Setup Docker
Now that we're on the new kernel you probably need to update some software to take advantage of it. To do this, simply run the command below.
apt update && apt upgrade
Once that is done, we need to make an adjustment to docker to use
overlay2 rather than
aufs is not
supported on this kernel currently. Run the command below to do so.
sed -i 's,/usr/bin/dockerd,/usr/bin/dockerd --storage-driver=overlay2,g' /lib/systemd/system/docker.service
systemd and start docker using the following commands.
systemctl daemon-reload service docker start
Docker should now be running and reporting no errors if you run