Digital Garage Docker image for the Ghost blogging platform.
This image is designed specifically to support the deployment of Ghost via Docker and Kubernetes via the Digital Garage. This image is a bit more configurable than the official Ghost Docker image.
What is Ghost?
The concept of the Ghost platform was first floated publicly in November 2012 in a blog post by project founder John O'Nolan, which generated enough response to justify coding a prototype version with collaborator Hannah Wolfe.
The first public version of Ghost, released October 2013, was financed by a successful Kickstarter campaign which achieved its initial funding goal of £25,000 in 11 hours and went on to raise a final total of £196,362 during the 29-day campaign.
Why yet another container for Ghost?
The official container for Ghost is fine for running in development mode, but it has the wrong
permissions for running in production. That, and the config file doesn't have any easy way to tweak
This container uses the official Ghost image as it's base, has a more "environment aware"
config.js file, and uses these environment variables to tune the config.
Quickstart on via Docker
docker run --name some-ghost -d thedigitalgarage/dg-ghost
This will start Ghost in development mode listening on the default port of 2368.
If you'd like to be able to access the instance from the host without the
contain's IP, standard port mappings can be used:
docker run --name some-ghost -p 8080:2368 -d thedigitalgarage/dg-ghost
Then, access it via
http://host-ip:8080 in a browser.
There are three environment variables that can be configured:
GHOST_URL: the URL of your blog (e.g.,
MAIL_FROM: the email of the blog installation (e.g.,
MAIL_HOST: which host to send email to (e.g.,
These can either be set on the Docker command line directly, or stored in a file and passed on
the Docker command line:
sudo cp ghost.example.env /etc/default/ghost sudo vi /etc/default/ghost docker run --name some-ghost --env-file /etc/default/ghost -p 8080:2368 -d thedigitalgarage/dg-ghost
If you have just pulled the Docker image with
docker pull thedigitalgarage/dg-ghost, the example
environment file looks like this:
# Ghost environment # Place in /etc/default/ghost GHOST_URL=http://www.example.com MAIL_FROM='"Webmaster" <firstname.lastname@example.org>' MAIL_HOST=mail.example.com
Running in production
The official Ghost image places the blog content in
/var/lib/ghost and exports it as a
This allows two main modes of operation:
Content on host filesystem
In this mode, the Ghost blog content lives on the filesystem of the host with the
1000. If this is acceptable, create a directory somewhere, and use the
-v Docker command
line option to mount it:
sudo mkdir -p /var/lib/ghost sudo chown 1000:1000 /var/lib/ghost docker run --name some-ghost --env-file /etc/default/ghost -p 80:2368 -v /var/lib/ghost:/var/lib/ghost -d ptimof/ghost npm start --production
Content in a data volume
This is the preferred mechanism to store the blog data. Please see the
for backup, restore, and migration strategies.
docker create -v /var/lib/ghost --name some-ghost-content busybox docker run --name some-ghost --env-file /etc/default/ghost -p 80:2368 --volumes-from some-ghost-content -d ptimof/ghost npm start --production
You should now be able to access this instance as
http://www.example.com in a browser.
Behind a reverse proxy
Of course, you should really be running Ghost behind a reverse proxy, and set things up to auto restart. For that,
a reasonable container would be:
docker create --name some-ghost -h ghost.example.com --env-file /etc/default/ghost -p 127.0.0.1:2368:2368 --volumes-from some-ghost-content --restart=on-failure:10 ptimof/ghost npm start --production docker run some-ghost
If you would like to read more about deploying and runnning this image on Digital Garage, you can find the tutorial on the Digital Garage Community site here:
- Deploy Ghost with the Digital Garage Instant App: a tutorial on deploying the Ghost Blogging Platform via Docker and Kubernetes on the Digital Garage.