docker-crontab/Dockerfile

FROM library/docker:stable

ENV HOME_DIR=/opt/crontab
RUN apk add --no-cache --virtual .run-deps gettext bash jq \
    && mkdir -p ${HOME_DIR}/jobs ${HOME_DIR}/projects \
    && adduser -S docker -D

COPY docker-entrypoint /
ENTRYPOINT ["/docker-entrypoint"]

HEALTHCHECK --interval=5s --timeout=3s \
    CMD ps aux | grep '[c]rond' || exit 1

CMD ["crond", "-f", "-d", "6", "-c", "/etc/crontabs"]
bug fix only first w/ onstart was triggered 2017-04-07 23:25:53 -06:00			`FROM library/docker:stable`
init commit 2017-02-12 16:28:53 -07:00
			`ENV HOME_DIR=/opt/crontab`
Added support for envsubst in image/container name Envsubst allows to use dynamic container name We use image name env substitution with docker-compose and .env to select right image tag for local development Within alpine, envsubst installed with gettext package. 2019-03-02 11:26:21 +03:00			`RUN apk add --no-cache --virtual .run-deps gettext bash jq \`
#6 Added `adduser` to the build script 2017-11-14 14:04:30 -07:00			`&& mkdir -p ${HOME_DIR}/jobs ${HOME_DIR}/projects \`
fix: clean up logic and only apply group if needed 2018-06-30 15:23:27 -06:00			`&& adduser -S docker -D`
init commit 2017-02-12 16:28:53 -07:00
			`COPY docker-entrypoint /`
			`ENTRYPOINT ["/docker-entrypoint"]`

			`HEALTHCHECK --interval=5s --timeout=3s \`
			`CMD ps aux \| grep '[c]rond' \|\| exit 1`

Turned off verbose logging For busybox cron level 6 is enough to see errors and hide debug info Debug info shown at level 5 Nothing shown at levels 0, 1, 2, 3, 4 See https://unix.stackexchange.com/questions/412805/crond-log-level-meaning 2019-03-02 15:45:19 +03:00			`CMD ["crond", "-f", "-d", "6", "-c", "/etc/crontabs"]`