Dockerfile (from centos) for building a Greengrass 1.7 image for ARMv7

Dockerfile

FROM centos
MAINTAINER massimo@it20.info

# This Dockerfile builds a GG image for the ARM64 platform
# curl this file: https://d1onfpft10uf5o.cloudfront.net/greengrass-core/downloads/1.7.0/aws-greengrass-docker-1.7.0.tar.gz
# untar it 
# move into the directory 
# curl this file: https://d1onfpft10uf5o.cloudfront.net/greengrass-core/downloads/1.7.0/greengrass-linux-armv7l-1.7.0.tar.gz 
# replace the Dockerfile in the directory with this Dockerfile
# run this command: docker build -t gg-armv7:1.7 --build-arg "greengrass_release=greengrass-linux-armv7l-1.7.0.tar.gz" . 
# follow the steps documented here: https://docs.aws.amazon.com/greengrass/latest/developerguide/run-gg-in-docker-container.html 

# Set ENV_VAR for Greengrass RC to be untarred inside Docker Image
ARG greengrass_release
ENV GREENGRASS_RELEASE=${greengrass_release}

# Install Greengrass Core Dependencies
RUN yum update -y && \
    yum install -y shadow-utils tar gzip xz wget java-1.8.0 && \
    wget https://nodejs.org/dist/v6.10.2/node-v6.10.2-linux-armv7l.tar.xz && \
    tar xf node-v6.10.2-linux-armv7l.tar.xz && \
    cp node-v6.10.2-linux-armv7l/bin/node /usr/bin/node && \
    ln -s /usr/bin/node /usr/bin/nodejs6.10 && \
    rm -rf node-v6.10.2-linux-armv7l.tar.xz node-v6.10.2-linux-armv7l && \
    yum remove -y wget

# Copy Greengrass Licenses AWS IoT Greengrass Docker Image
COPY greengrass-license-v1.pdf /

# Create ggc_user and ggc_group
RUN useradd -r ggc_user
RUN groupadd -r ggc_group

# Copy/Untar Greengrass RC inside Docker Image
COPY $greengrass_release /
RUN tar xzf /$GREENGRASS_RELEASE -C /
RUN rm /$GREENGRASS_RELEASE

# Copy start-up script
COPY "greengrass-entrypoint.sh" /

# Expose 8883 to pub/sub MQTT messages
EXPOSE 8883