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30 lines
1.5 KiB
Markdown
30 lines
1.5 KiB
Markdown
# quadportnick/cups-airprint
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This Ubuntu-based Docker image runs a CUPS instance that is meant as an AirPrint relay for printers that are already on the network but not AirPrint capable. I'm using it on a Synology NAS because for whatever reason the built in functionality is broken. So here we are...
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The Synology's CUPS is turned off and the local Avahi will be utilized for advertising the printers on the network.
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## Setting it up
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From the Synology CLI:
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~~~
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sudo docker pull quadportnick/cups-airprint
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mkdir -p /volume1/docker/cups-airprint/config
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mkdir -p /volume1/docker/cups-airprint/services
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sudo docker create --name cups-airprint -e CUPSADMIN=cups -e CUPSPASSWORD=cupZZZ! -v /volume1/docker/cups-airprint/config:/config -v /volume1/docker/cups-airprint/services:/services -p 631:631 quadportnick/cups-airprint
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sudo docker start cups-airprint
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~~~
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CUPS will be configurable at http://[diskstation]:631 using the CUPSADMIN/CUPSPASSWORD when needed.
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Once printers are configured, go back and copy the .services files into live Avahi
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~~~
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rm -rf /etc/avahi/services/Airprint-*.service
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cp /volume1/docker/cups-airprint/services/* /etc/avahi/services/
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~~~
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## Notes
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* CUPS doesn't like printers.conf being mounted directly as it appears to delete/recreate it with changes, so we copy it in on start and then watch for it to change to make a backup of it.
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* Watching for the printers.conf file changing also triggers generating the Avahi services. Thanks to @thfontaine for the script! <https://github.com/tjfontaine/airprint-generate>
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