allanlei · January 7, 2019 16:26
diff --git a/Dockerfile b/Dockerfile
 FROM        alpine

 COPY        entrypoint.sh /
 RUN         chmod +x /entrypoint.sh
 ENTRYPOINT  ["/entrypoint.sh"]

 # run: docker run -it --rm IMAGE "* * * * * echo hello"
diff --git a/entrypoint.sh b/entrypoint.sh
 #!/bin/sh
 set -e

 echo "$1" | crontab - && crond -f -L /dev/stdout
	FROM alpine

	COPY entrypoint.sh /
	RUN chmod +x /entrypoint.sh
	ENTRYPOINT ["/entrypoint.sh"]

	# run: docker run -it --rm IMAGE "* * * * * echo hello"
	#!/bin/sh
	set -e

	echo "$1" \| crontab - && crond -f -L /dev/stdout