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Docker Thumbor container

None of the containers I could find online seemed to be working properly with open CV and an injectable security key. This one is based on debian jessie and has those features, plus aggressive face detection and filesystem-based cache. Face detection for cropping is our primary use case, so decisions in this system are optimized for that.

TODOS include using redis for the cache via an ENV var so that this is more load-balancable.

Usage:

The container starts on port 80 serving HTTP traffic by default.

$ docker run -p 80:80 mavenclinic/thumbor
$ wget http://dockerip:80/unsafe/300x300/smart/<some_image_URL>

Adding a secret key (and turning off unsafe URLs) is as simple as:
$ docker run -p 80:80 -e SECRET_KEY=foobar mavenclinic/thumbor

Configuration

The container comes with a default configuration, that includes:

  • Using the filesystem storage, in /srv/thumbor/storage.
  • Unsafe urls are enabled.

To customize the configuration, you should share in a config file to /etc/thumbor.conf using any way to get files on there, including docker's -v option or --volumes-from for example. You should also override the default command of /init or put your secret key in your thumbor.conf instead of the ENV, because the /init script will append safe URLs only and your secret key at the end of the file if that is present.

Volumes

/srv/thumbor/storage
In the default configuration, this is the image cache.

Environment variables

SECURITY_KEY
Sets the security key and disallows "unsafe" urls.

Note

This message:

"libdc1394 error: Failed to initialize libdc1394"

from OpenCV seems to be a warning only.

Credits

This was heavily inspired by https://github.com/miracle2k/dockerfiles/tree/master/thumbor.

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mavenclinic

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