Run crons in Docker ; get cron logs as std Docker log

Dockerfile

FROM ubuntu:14.04

MAINTAINER li0nel

USER root

# Install CRON
RUN apt-get update && apt-get -y install sudo && \
    apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 7F0CEB10 && \
    echo "deb http://repo.mongodb.org/apt/ubuntu "$(lsb_release -sc)"/mongodb-org/3.0 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-3.0.list && \
    apt-get update && \
    apt-get install -y mongodb-org cron curl && \
    apt-get clean && rm -rf /var/lib/apt/lists/*

RUN mkdir /home/mongobk
RUN echo "mongodump --host 10.0.0.6:27017 --db delta --out /home/mongobk \
    && tar -zcvf - /home/mongobk/delta | curl -X PUT --data-binary @- -H 'x-ms-blob-type: BlockBlob' https://dbbackupxxxxx.blob.core.windows.net/mongo/\$(date +%Y%m%d_%H%M%S).json.gz \
    && rm -rf /home/mongobk/delta" > /home/backup.sh
RUN chmod +x /home/backup.sh

RUN echo "0 * * * * root /home/backup.sh >> /var/log/cron.log 2>&1" > /etc/cron.d/backup

RUN chmod +x /etc/cron.d/backup

RUN touch /var/log/cron.log

CMD cron && tail -f /var/log/cron.log

thank you :-)