Dockerfile on Raspberry Pi 3B+

Question

I'm trying to create a docker image on Raspberry Pi 3B+, which i couldn't managed for days. Before creating Docker image, i implemented the code with virtualenv beforehand, which is working fine and requirements.txt is simplified as possible.

Dockerfile ->

FROM alpine:3.14

WORKDIR /code

RUN apk update
RUN apk add python3
RUN apk add py3-pip

RUN pip install wheel
RUN python3 -m pip install --upgrade pip
RUN python3 -m pip install --upgrade Pillow

# copy the requirements inside docker image
COPY ./requirements.txt /code/requirements.txt

# install dependencies inside docker image
RUN pip install --no-cache-dir --upgrade -r /code/requirements.txt

# copy the necessary files in the working directory inside docker image
COPY ./ /code

# RUN the code
CMD ["python3", "camera.py"]

requirements.txt ->

numpy==1.22.3
picamera==1.13
Pillow==9.1.0
requests==2.27.1

When i try to build the image by running

sudo docker build -t camera .

I get the following long error

 Building wheels for collected packages: Pillow   Building wheel for
 Pillow (setup.py): started   Building wheel for Pillow (setup.py):
 finished with status 'error'   error: subprocess-exited-with-error
 × python setup.py bdist_wheel did not run successfully.   │ exit code: 1   ╰─> [177 lines of output]
  
  During handling of the above exception, another exception occurred:
  Traceback (most recent call last):
    File "<string>", line 2, in <module>
    File "<pip-setuptools-caller>", line 34, in <module>
    File "/tmp/pip-install- 
    7613obru/pillow_a212af14addc481892cfcd3648121cf3/setup.py",
  line 1009, in <module>
      raise RequiredDependencyException(msg)
  __main__.RequiredDependencyException:
  
  The headers or library files could not be found for zlib,
  a required dependency when compiling Pillow from source.
  
  Please see the install instructions at:
     https://pillow.readthedocs.io/en/latest/installation.html
  
  
  [end of output]
 note: This error originates from a subprocess, and is likely not a problem with pip.   ERROR: Failed building wheel for Pillow  
Running setup.py clean for Pillow Failed to build Pillow Installing
collected packages: Pillow   Running setup.py install for Pillow:
started   Running setup.py install for Pillow: finished with status
'error'   error: subprocess-exited-with-error
× Running setup.py install for Pillow did not run successfully.   │ exit code: 1   ╰─> [179 lines of output]
  running install
  running build
  running build_py
  creating build
  creating build/lib.linux-armv7l-3.9
  creating build/lib.linux-armv7l-3.9/PIL
  copying src/PIL/ImageTk.py -> build/lib.linux-armv7l-3.9/PIL
  copying src/PIL/ImageDraw2.py -> build/lib.linux-armv7l-3.9/PIL
  
  
  The headers or library files could not be found for zlib,
  a required dependency when compiling Pillow from source.
  
  Please see the install instructions at:
     https://pillow.readthedocs.io/en/latest/installation.html
  
   line 804, in build_extensions
      raise RequiredDependencyException(f)
  __main__.RequiredDependencyException: zlib
  
  During handling of the above exception, another exception occurred:
  
  Traceback (most recent call last):
    File "<string>", line 2, in <module>
    File "<pip-setuptools-caller>", line 34, in <module>
    File "/tmp/pip-install- 
    7613obru/pillow_a212af14addc481892cfcd3648121cf3/setup.py",
   line 1009, in <module>
      raise RequiredDependencyException(msg)
  __main__.RequiredDependencyException:
  
  The headers or library files could not be found for zlib,
  a required dependency when compiling Pillow from source.
  
  Please see the install instructions at:
     https://pillow.readthedocs.io/en/latest/installation.html
  
  
  [end of output]
  note: This error originates from a subprocess, and is likely not a problem with pip. error: legacy-install-failure

     × Encountered error while trying to install package. ╰─> Pillow

     note: This is an issue with the package mentioned above, not pip.
     hint: See above for output from the failure.

I've deleted some repetitive lines of error since it was extremely long

Answer 1

It seems i have development libraries missing, i added the following lines and the error was solved

RUN apk add build-base python3-dev py-pip jpeg-dev zlib-dev py3-wheel py3-setuptools
ENV LIBRARY_PATH=/lib:/usr/lib