Hi I'm trying to run a cron job in a docker container.
So I have added that in my Dockerfile
My Dockerfile
FROM nginx:stable
RUN apt-get update -y && apt-get upgrade -y && apt-get install -y \
vim \
git \
curl \
wget \
certbot \
cron
COPY cron/crontab /etc/crontab
RUN chmod 0644 /etc/cron.d/crontab
RUN /etc/init.d/cron start
My crontab file
# /etc/crontab: system-wide crontab
# Unlike any other crontab you don't have to run the `crontab'
# command to install the new version when you edit this file
# and files in /etc/cron.d. These files also have username fields,
# that none of the other crontabs do.
SHELL=/bin/sh
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
# m h dom mon dow user command
*/1 * * * * root echo "test" >>~/readme
But it does not work.
I have to run the command /etc/init.d/cron start manually in my nginx container if I want it to work.
So I have added an entrypoint in my Dockerfile, so this command can be executed when the container start.
# ENTRYPOINT
ADD entrypoint.sh /entrypoint.sh
RUN chmod 777 /entrypoint.sh
My entrypoint.sh
#!/usr/bin/env bash
/etc/init.d/cron start
My docker-compose
entrypoint: /entrypoint.sh
But I have this error:
OCI runtime exec failed: exec failed: container_linux.go:296: starting container process caused "process_linux.go:86: executing setns process caused "exit status 21"": unknown
Did I miss something?
PS: I have followed this tutorial