Cloud Foundry applications can blend multiple buildpacks together. If your application requires OpenCV, then this buildpack can help you.
If you want to learn how to make a "supply"-only buildpack for multi-buildpack support, then this is an example buildpack for you. Learn more from Keaty Gross at Cloud Foundry Summit EU 2017 in her keynote and session talk.
- Admins can download buildpacks
- Concourse CI
- Discussions and CI notifications at #opencv channel on https://slack.cloudfoundry.org
Use the buildpack from its Git repo:
cf v3-push py-sample-app-with-opencv -p fixtures/py-sample \
-b https://github.com/cloudfoundry-community/opencv-buildpack \
-b python_buildpack
If your administrator has installed opencv_buildpack, then you can reference it by name:
cf buildpacks
cf v3-push py-sample-app-with-opencv -p fixtures/py-sample \
-b opencv_buildpack \
-b python_buildpack
NOTE: you may need to change py-sample-app-with-opencv to something unique if you get an error about the default route already existing on your Cloud Foundry.
During staging, you will see OpenCV being installed:
Successfully created container
Downloading build artifacts cache...
Downloading app package...
Downloaded app package (826B)
-----> Download go 1.9
-----> Running go build supply
-----> OpenCV Buildpack version 0.1.0
-----> Installing opencv
Using opencv version 3.3.0
-----> Installing opencv 3.3.0
Download [http://opencv-buildpack.s3-website-us-east-1.amazonaws.com/blobs/opencv/opencv-compiled-3.3.0.tgz]
-----> Python Buildpack version 1.6.1
-----> Supplying Python
-----> Installing python 3.6.3
...
Next, you can test that your app and the opencv library are working with a client app:
cd fixtures/py-sample
export SERVER_URL=https://py-sample-app-with-opencv.cfapps.io
python3 client.py
The response should be:
{'message': 'image received. size=512x512'}
You might also need to use the apt-buildpack to include any runtime dependencies you need.
The packages/opencv folder contains the instructions for compiling + uploading a binary version of OpenCV.