Clara Application Container Developer Guide

            

            
import clara

@clara.startup_cb
def startup():
    print("[clara] startup() is called. Do app init as needed.")

@clara.prepare_cb
def prepare():
    print("[clara] prepare() is called. Prepare for a new job.")

@clara.execute_cb
def execute(payload):
    print("[clara] execute() is called. Execute on input data and save output.")

@clara.cleanup_cb
def cleanup():
    print("[clara] cleanup() is called. Clean up resources.")

@clara.error_cb
def error(result, message, entry_name, kind):
    print(result, message, entry_name, kind)

if __name__ == "__main__":
    clara.start()
    # Wait until all callbacks are called.
    clara.wait_for_completion()
        

            

            
@clara.execute_cb
def execute(payload):
    print("Input file paths:")
    for input_stream in payload.inputs:
        print("  - {}".format(input_stream.path))

    print("Output file paths:")
    for output_stream in payload.outputs:
        print("  - {}".format(output_stream.path))
        

            

            
#!/bin/bash
export NVIDIA_CLARA_RUNSIMPLE=TRUE
export NVIDIA_CLARA_JOBID=$(cat /proc/sys/kernel/random/uuid) # Random uuid
export NVIDIA_CLARA_JOBNAME="test-vnet"
export NVIDIA_CLARA_STAGENAME="ai"
export NVIDIA_CLARA_APPDIR=$(pwd)
export NVIDIA_CLARA_INPUTS="input/recon.mhd"
export NVIDIA_CLARA_OUTPUTS="output/recon.seg.mhd"
export NVIDIA_CLARA_TRTISURI="localhost:8000"
export NVIDIA_CLARA_PUBLISHPATH="publish"
        

            

            
# Copyright (c) 2019, NVIDIA CORPORATION.  All rights reserved.
#
# NVIDIA CORPORATION and its licensors retain all intellectual property
# and proprietary rights in and to this software, related documentation
# and any modifications thereto.  Any use, reproduction, disclosure or
# distribution of this software and related documentation without an express
# license agreement from NVIDIA CORPORATION is strictly prohibited.

FROM ubuntu:16.04

ENV PYVER=3.5
ENV LC_ALL=C.UTF-8
ENV LANG=C.UTF-8

# Use the same user name and home folder regardless of actual user.
ENV USER=root
ENV HOME=/root

RUN apt-get update \
    && apt-get install -y --no-install-recommends \
        python3.5 \
        curl \
        libcurl3 \
        rsync \
        ca-certificates \
    && curl -O https://bootstrap.pypa.io/get-pip.py \
    && rm -rf /var/lib/apt/lists/*

# Make /usr/bin/python point to the $PYVER version of python
RUN rm -f /usr/bin/python \
    && rm -f /usr/bin/python`echo $PYVER | cut -c1-1` \
    && ln -s /usr/bin/python$PYVER /usr/bin/python \
    && ln -s /usr/bin/python$PYVER /usr/bin/python`echo $PYVER | cut -c1-1` \
    && python$PYVER get-pip.py \
    && rm get-pip.py

WORKDIR /app

RUN mkdir -p input output

# Copy code, scripts and packages
COPY ./sdk_dist/*.whl ./sdk_dist/
COPY ./trtis_client/*.whl ./trtis_client/
COPY ./app_vnet ./app_vnet
COPY ./Pipfile ./

# Remove unnecessary files in 3rd-party package (python3.5/site-packages/future/backports/test/*.pem)
# Allow any users to access /root/.cache and /root/.local for pip/pipenv
RUN pip install --upgrade setuptools pipenv \
    && pipenv install --python 3.5 ./trtis_client/*.whl ./sdk_dist/*.whl --skip-lock \
    && pipenv run pip install -r ./app_vnet/requirements.txt \
    && rm -rf $(pipenv --venv)/lib/python3.5/site-packages/future/backports/test/*.pem \
    && rm -rf /root/.cache/* \
    && chmod -R 777 /root

ENTRYPOINT ["pipenv", "run", "python", "app_vnet/main.py"]