Supported tags and respective
For more information about this image and its history, please see the relevant manifest file (
library/backdrop). This image is updated via pull requests to the
docker-library/official-images GitHub repo.
For detailed information about the virtual/transfer sizes and individual layers of each of the above supported tags, please see the
backdrop/tag-details.md file in the
docker-library/docs GitHub repo.
What is Backdrop CMS?
Backdrop CMS is a comprehensive Content Management System for small to medium sized businesses and non-profits. It is a fork of the Drupal project.
Backdrop CMS enables people to build highly customized websites, affordably, through collaboration and open source software. For more on the Backdrop's philosophy see https://backdropcms.org/philosophy.
How to use this image
The basic pattern for starting a
backdrop instance is:
$ docker run --name some-backdrop --link some-mysql:mysql -d backdrop
The following environment variables are also honored for configuring your Backdrop CMS instance:
-e BACKDROP_DB_HOST=...(defaults to the IP and port of the linked
-e BACKDROP_DB_USER=...(defaults to "root")
-e BACKDROP_DB_PASSWORD=...(defaults to the value of the
MYSQL_ROOT_PASSWORDenvironment variable from the linked
-e BACKDROP_DB_NAME=...(defaults to "backdrop")
-e BACKDROP_DB_PORT=...(defaults to 3306)
-e BACKDROP_DB_DRIVER=...(defaults to "mysql")
BACKDROP_DB_NAME must already exist on the given MySQL server. Check out the official mysql image for more info on spinning up a DB.
If you'd like to be able to access the instance from the host without the container's IP, standard port mappings can be used:
$ docker run --name some-backdrop --link some-mysql:mysql -p 8080:80 -d backdrop
Then, access it via
http://host-ip:8080 in a browser.
If you'd like to use an external database instead of a linked
mysql container, specify the hostname and port with
BACKDROP_DB_PORT along with the password in
BACKDROP_DB_PASSWORD and the username in
BACKDROP_DB_USER (if it is something other than
$ docker run --name some-backdrop \ -e BACKDROP_DB_HOST=10.1.2.3 \ -e BACKDROP_DB_PORT=10432 \ -e BACKDROP_DB_USER=... \ -e BACKDROP_DB_PASSWORD=... \ -d backdrop
backdrop: image: backdrop links: - db:mysql ports: - 8080:80 db: image: mysql environment: MYSQL_USER: backdrop MYSQL_PASSWORD: backdrop MYSQL_ALLOW_EMPTY_PASSWORD: 'yes' MYSQL_DATABASE: backdrop
docker-compose up, wait for it to initialize completely, and visit
Adding additional libraries / extensions
This image does not provide any additional PHP extensions or other libraries, even if they are required by popular plugins. There are an infinite number of possible plugins, and they potentially require any extension PHP supports. Including every PHP extension that exists would dramatically increase the image size.
If you need additional PHP extensions, you'll need to create your own image
FROM this one. The documentation of the
php image explains how to compile additional extensions. Additionally, the
drupal:7 Dockerfile has an example of doing this.
The following Docker Hub features can help with the task of keeping your dependent images up-to-date:
- Automated Builds let Docker Hub automatically build your Dockerfile each time you push changes to it.
- Repository Links can ensure that your image is also rebuilt any time
View license information for the software contained in this image.
Supported Docker versions
This image is officially supported on Docker version 1.11.0.
Support for older versions (down to 1.6) is provided on a best-effort basis.
Please see the Docker installation documentation for details on how to upgrade your Docker daemon.
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