[ Docker link to existing container or image at build ]
I am trying to separate an app into an
app image and a
database image using 2
Dockerfiles. Both are using
FROM debian:jessie as a base image. The issue that I am running into is that certain packages in the
app image need to know the database location at build. Is there any way to link a build command to an existing image or container?
database image is an HDF5 datastore which I have successfully built.
app image is a
Python 3.5 image which installs packages for working with
HDF5. The error that I am getting at build is:
Step 15 : RUN pip install tables ---> Running in 9ea6d6b53a19 Collecting tables Downloading tables-3.2.2.tar.gz (7.0MB) Complete output from command python setup.py egg_info: /usr/bin/ld: cannot find -lhdf5 collect2: error: ld returned 1 exit status * Using Python 3.5.1 (default, Jan 13 2016, 18:51:24) * USE_PKGCONFIG: True .. ERROR:: Could not find a local HDF5 installation. You may need to explicitly state where your local HDF5 headers and library can be found by setting the ``HDF5_DIR`` environment variable or by using the ``--hdf5`` command-line option.
I think I need create an
HDF5_DIR environment variable in my
Dockerfile using something like
ENV HDF5_DIR path/to/hdf5/container/urs/bin/ld but I am not sure if that is correct or how to get the path to a running
database container. Or if linking it to the
database container is incorrect and I need to link it to the actual image (if that's even possible).
I know that
HDF5 is not a common tool, but hopefully this is more of a generic issue with a generic solution. Let me know if you need to see the full
You need to add libhdf5-dev to your docker image. I create a Dockerfile you can extend:
FROM python:3.5 RUN apt-get update RUN apt-get -y install libhdf5-dev RUN pip install tables