[recommendationservice] - base image, licensing and diagram update

[julianocosta89]

Changes

• Updated base image of recommendationservice to use a smaller one.
  • Image size reduced from 991MB to 190MB.
• As we have changed the files enough, I've updated the licensing to OTel authors.
• Updated demo diagram, as the call from recommendationservice to featureflagservice was missing.

Merge Requirements

For new features contributions please make sure you have completed the following
essential items:

• CHANGELOG.md updated to document new feature additions
• Appropriate documentation updates in the docs folder

Maintainers will not merge until the above have been completed. If you're unsure
which docs need to be changed ping the
@open-telemetry/demo-approvers.

[cartersocha]

I'm getting a build error when trying to install psutils. Copying a cut down error message

Building wheels for collected packages: psutil
#0 32.64 Building wheel for psutil (setup.py): started
#0 33.53 Building wheel for psutil (setup.py): finished with status 'error'
#0 33.54 error: subprocess-exited-with-error
#0 33.54
#0 33.54 × python setup.py bdist_wheel did not run successfully.
#0 33.54 │ exit code: 1
#0 33.54 ╰─> [43 lines of output]
#0 33.54 running bdist_wheel
#0 33.54 running build
#0 33.54 running build_py
#0 33.54 building 'psutil._psutil_linux' extension
#0 33.54 creating build/temp.linux-aarch64-cpython-310
#0 33.54 creating build/temp.linux-aarch64-cpython-310/psutil
#0 33.54 gcc -pthread -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -fPIC -DPSUTIL_POSIX=1 -DPSUTIL_SIZEOF_PID_T=4 -DPSUTIL_VERSION=592 -DPSUTIL_LINUX=1 -DPSUTIL_ETHTOOL_MISSING_TYPES=1 -I/usr/local/include/python3.10 -c psutil/_psutil_common.c -o build/temp.linux-aarch64-cpython-310/psutil/_psutil_common.o
#0 33.54 C compiler or Python headers are not installed on this system. Try to run:
#0 33.54 sudo apt-get install gcc python3-dev
#0 33.54 error: command 'gcc' failed: No such file or directory
#0 33.54 [end of output]
#0 33.54
#0 33.54 note: This error originates from a subprocess, and is likely not a problem with pip.
#0 33.54 ERROR: Failed building wheel for psutil
#0 33.54 Running setup.py clean for psutil
#0 34.09 Failed to build psutil
#0 34.17 Installing collected packages: wrapt, typing-extensions, six, python-json-logger, python-dotenv, psutil, protobuf, opentelemetry-semantic-conventions, backoff, opentelemetry-proto, grpcio, googleapis-common-protos, deprecated, opentelemetry-api, grpcio-health-checking, opentelemetry-sdk, opentelemetry-instrumentation, opentelemetry-exporter-otlp-proto-grpc, opentelemetry-distro
#0 34.50 Running setup.py install for psutil: started
#0 35.64 Running setup.py install for psutil: finished with status 'error'
#0 35.64 error: subprocess-exited-with-error
#0 35.64
#0 35.64 × Running setup.py install for psutil did not run successfully.
#0 35.64 │ exit code: 1
#0 35.64 ╰─> [45 lines of output]
#0 35.64 running install
#0 35.64 /usr/local/lib/python3.10/site-packages/setuptools/command/install.py:34: SetuptoolsDeprecationWarning: setup.py install is deprecated. Use build and pip and other standards-based tools.
#0 35.64 warnings.warn(
#0 35.64 running build
#0 35.64 running build_py
#0 35.64
#0 35.64 building 'psutil._psutil_linux' extension
#0 35.64 creating build/temp.linux-aarch64-cpython-310
#0 35.64 creating build/temp.linux-aarch64-cpython-310/psutil
#0 35.64 gcc -pthread -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -fPIC -DPSUTIL_POSIX=1 -DPSUTIL_SIZEOF_PID_T=4 -DPSUTIL_VERSION=592 -DPSUTIL_LINUX=1 -DPSUTIL_ETHTOOL_MISSING_TYPES=1 -I/usr/local/include/python3.10 -c psutil/_psutil_common.c -o build/temp.linux-aarch64-cpython-310/psutil/_psutil_common.o
#0 35.64 C compiler or Python headers are not installed on this system. Try to run:
#0 35.64 sudo apt-get install gcc python3-dev
#0 35.64 error: command 'gcc' failed: No such file or directory
#0 35.64 [end of output]
#0 35.64
#0 35.64 note: This error originates from a subprocess, and is likely not a problem with pip.
#0 35.64 error: legacy-install-failure
#0 35.64
#0 35.64 × Encountered error while trying to install package.
#0 35.64 ╰─> psutil

[cartersocha]

I think this thread answers the root issue: watson-developer-cloud/python-sdk#418 (comment)

Question is do we want to continue to use the slim package and update our build docs or find an image with the dependency

[mviitane]

I have the same problem. Doesn't build on Mac M1.

To simplify a bit, the licensing and diagram changes could be split into another PR.

[mviitane]

Builds and runs fine after that latest change.

[cartersocha]

Lgtm. Build time was roughly equivalent but image size dropped from 1.52 GB to 284 MB. Nice!