The 30-minute Discourse installation guide assumes you’ll be using Digital Ocean and makes no mention of an important requirement for Docker:
If you want to use Linode, here’s how to enable AUFS support in Ubuntu (for other OSes, refer to Linode’s guide and update the instructions below accordingly:
- Create the Linode and pick Ubuntu 14.04 LTS
- Resize the main disk down to allow for a larger swap partition than the default 512MB. For example, for the $10 Linode 1024, resize the main partition to 22528MB, then resize the swap partition to 2048MB.
- SSH into the VPS and run the following commands while remaining root:
sudo apt-get update
apt-get install -y linux-image-virtual grub2 mc htop
- Optional: run
htopand confirm the swap is 2048MB
- Choose the main disk for Grub to boot from, if asked
mcedit /etc/default/gruband match the config to these settings:
GRUB_SERIAL_COMMAND="serial --speed=19200 --unit=0 --word=8 --parity=no --stop=1"was present in the guide, but I didn’t find it to be necessary]
- Save and run
- In your Linode’s Dashboard, Click on Edit under the Configuration Profiles section.
- In the Boot Settings section, select GRUB 2 from the Kernel drop down menu
- Save changes and reboot.
- SSH in again and run these commands (credit Peter Parente):
apt-get -y install linux-image-extra-$(uname -r)
sh -c "wget -qO- https://get.docker.io/gpg | apt-key add -"
sh -c "echo deb http://get.docker.io/ubuntu docker main\ > /etc/apt/sources.list.d/docker.list"
apt-get -y install lxc-docker
- Confirm that you have AUFS support by running
docker info. You should not see
- Continue with the Discourse installation guide, starting with “Install Discourse” (since you have already installed Docker).
Disclaimer: I don’t exactly understand everything that’s going on here, but I’ve just performed these steps, and they’ve worked for me. Here’s Docker using AUFS:
root@localhost:/var/discourse# docker info Containers: 0 Images: 7 Server Version: 1.9.1 Storage Driver: aufs Root Dir: /var/lib/docker/aufs Backing Filesystem: extfs Dirs: 7 Dirperm1 Supported: false Execution Driver: native-0.2 Logging Driver: json-file Kernel Version: 3.13.0-77-generic Operating System: Ubuntu 14.04.1 LTS CPUs: 1 Total Memory: 993.9 MiB Name: localhost
Note that this method of installing Docker might not add it to the startup script. I found that was fixed by launching the app and rebooting the Linode later.