This image provides builds of cups that include a few additional features to make it easier to install and maintain within docker
This image is a bit different from the other cups images on the docker hub in that it does not just use distro packages. I am building cups and cups-filters from source. This means as new versions of cups come out I can update to them quicker. I can also tag out individual releases with this so you can specify your cups version.
If you have a suggestion for how to improve usability of this image, feel free to post on the github issue tracker.
As of 2.3 this image is on buster. dnssd discovery is flakey with debian buster right now. It works well with ip addresses or regular hostnames, but dnssd discovered printers intermittently drop off. It is likely fixable with some changes to the avahi configuration. but avahi isn't part of this by default anyway, it's only installed if you install the hplip drivers.
Things like users are hacky at best and the default configuration for cups does not seem to be particularly suited to docker. I am accepting any fixes (documentation, patches to source, or patches for the installed configuration) to improve usability.
CUPS is pretty useless without drivers. Unfortunately it does not come with many drivers in the default install. Your best bet for getting drivers working is to create a dockerfile with this image as the FROM source and install your drivers that way. To make getting drivers installed easier I will include shell scripts in /usr/local/docker/share/drivers to handle installation of common drivers. If you manage to get a new driver working please post a description of how you did it on the github issue tracker, or submit a PR.
hplip can be installed by running /usr/local/docker/share/drivers/hplip.sh in the image, you must then follow up with running hp-plugin and accepting the license agreement for a fully working install.
foomatic can be installed by running /usr/local/docker/share/drivers/foomatic.sh in the image. This will only install foomatic-filters and foomatic-db-filters. To install foomatic-db and foomatic-db-nonfree you will need to follow up with /usr/local/docker/share/drivers/foomatic-db.sh. Eventually once I've tested it and am satisfied with the foomatic-filters install I may move foomatic-filters into the main buildscript and combine the three db packages into a single install script.
/configThis volume contains a couple subfolders.
/config/etcThis subfolder contains your cups configuration files.
/config/logThis subfolder contains your log files
/config/init.d (Optional)This optional subfolder contains a set of scripts to be run before the cups daemon launches.