cron-docker/Dockerfile

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Docker
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FROM debian:buster
LABEL Maintainer="Wolfgang Hottgenroth <woho@hottis.de>"
LABEL ImageName="registry.hottis.de/dockerized/cron-docker"
ARG SMARTHOST="172.16.11.15"
ARG MAILDOMAIN="hottis.de"
ARG APP_DIR="/opt/app"
RUN \
apt update && \
apt install -y cron && \
apt install -y exim4 && \
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apt install -y vim.tiny && \
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apt install -y python3 && \
apt install -y python3-pip && \
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update-alternatives --install /usr/bin/python python /usr/bin/python3 10 && \
update-alternatives --install /usr/bin/pip pip /usr/bin/pip3 10 && \
pip install requests && \
pip install Cheetah3 && \
pip install pandas && \
pip install influxdb && \
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sed -i \
-e "s/dc_eximconfig_configtype='local'/dc_eximconfig_configtype='satellite'/" \
-e "s/dc_smarthost=''/dc_smarthost='${SMARTHOST}'/" \
-e "s/dc_readhost=''/dc_readhost='${MAILDOMAIN}'/" \
/etc/exim4/update-exim4.conf.conf && \
env DEBIAN_FRONTEND=noninteractive dpkg-reconfigure -f debconf exim4-config && \
mkdir -p ${APP_DIR} && \
useradd -d ${APP_DIR} -u 1000 user
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COPY crontab ${APP_DIR}/
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COPY *.py ${APP_DIR}/
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RUN \
ln -s /etc/crontab ${APP_DIR}/crontab
VOLUME ${APP_DIR}
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# USER 1000:1000
WORKDIR ${APP_DIR}
CMD [ "/usr/sbin/cron", "-f" ]