35 lines
1.2 KiB
Docker
35 lines
1.2 KiB
Docker
#
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# crond Dockerfile
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#
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# Pull base image.
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FROM debian:jessie
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# Install Nginx.
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RUN DEBIAN_FRONTEND=noninteractive \
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apt-get update && \
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apt-get install -y --no-install-recommends cron
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# we need to make sure that /etc/cron.* cronjobs are not run as root
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# it's not required for the operation (after all, all the cronjobs are to be
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# doing is either some http requests, or some stuff against a database)
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#
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# first, remove the unnecessary cron.daily scripts
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#
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# then, change the user to nobody for cron.(hourly|daily|weekly|monthly),
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# conveniently configured in /etc/crontab
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#
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# finally, make sure that this sed script runs every few minutes on all /etc/cron.d files
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RUN rm -rf /etc/cron.*/* \
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&& sed -i -r -e 's/^(([/0-9*,-]+\s+){5}|@(reboot|yearly|annually|monthly|weekly|daily|midnight|hourly)\s+)root\s+(.*)/\1\tnobody\t\4/' /etc/crontab \
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&& echo "*/15 * * * * root sed -i -r -e 's/^(([/0-9*,-]+\s+){5}|@(reboot|yearly|annually|monthly|weekly|daily|midnight|hourly)\s+)root\s+(.*)/\\1\\tnobody\\t\\4/' /etc/cron.d/*" >> /etc/crontab
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# cron volumes
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VOLUME ["/etc/cron.d", "/etc/cron.daily", "/etc/cron.hourly", "/etc/cron.monthly", "/etc/cron.weekly"]
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# well
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WORKDIR /etc
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# command and entrypoint
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CMD []
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ENTRYPOINT ["/usr/sbin/cron", "-f"] |