Alpine Linux based cronjob runner

Dockerfile

FROM alpine:latest

RUN apk add --update php python py-pip mysql-client \
    && pip install awscli \
    && rm -rf /var/cache/apk/*

RUN touch crontab.tmp \
    && echo '* */6 * * * /usr/bin/php /var/www/partkeepr/app/console partkeepr:cron:run' > crontab.tmp \
    && echo '0 2   * * * /usr/bin/sql_backup' >> crontab.tmp \
    && crontab crontab.tmp \
    && rm -rf crontab.tmp

CMD ["/usr/sbin/crond", "-f", "-d", "0"]

log level

/* Log levels:
 * 0 is the most verbose, default 8.
 * For some reason, in fact only 5, 7 and 8 are used.
 */

Using it with an online view on some logs:

ENTRYPOINT ["/bin/sh", "-c", "crond -f -d 0 && tail -F /var/log/1.log & tail -F /var/log/2.log"]