Docker image that allows running Ghost in production mode, and is a bit more configurable than the official Ghost Docker image.
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 it.
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.
docker run --name some-ghost -d ptimof/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 ptimof/ghost
Then, access it via http://localhost:8080 or 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.,http://www.example.com)MAIL_FROM: the email of the blog installation (e.g.,'"Webmaster" <[email protected]>')MAIL_HOST: which host to send email to (e.g.,mail.example.com)
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 ptimof/ghost
If you have just pulled the Docker image with docker pull ptimof/ghost, the example
environment file looks like this:
# Ghost environment
# Place in /etc/default/ghost
GHOST_URL=http://www.example.com
MAIL_FROM='"Webmaster" <[email protected]>'
MAIL_HOST=mail.example.com
The official Ghost image places the blog content in /var/lib/ghost and exports it as a VOLUME.
This allows two main modes of operation:
In this mode, the Ghost blog content lives on the filesystem of the host with the UID:GID of
1000:1000. 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
This is the preferred mechanism to store the blog data. Please see the Docker documentation 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.
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
I've written a bit more about using Ghost as a Docker image:
- Hacking on Ghost themes: a development workflow for modifying a Ghost theme.
- Moving to Docker: Ghost: Running Ghost as a production service in a container.
- Moving to Docker: NGINX reverse proxy with SSL termination: a more complicated example of running Ghost in production, using NGINX to front-end Ghost, and Ghost using SASL (authenticated login) to a mail relay server.