Я пытаюсь заставить cronjob работать в проекте, развернутом с помощью Docker. Я могу создать образ и успешно запустить контейнер, однако, когда я вхожу в контейнер и проверяю /var/log задание cron не запустилось.
Вот файлы:
Dockerfile
# use this image, as we'll need to run chron etc.
FROM phusion/baseimage:0.11
# Install python3, pip and cron
RUN apt-get update && \
apt-get -y install cron python3 python3-pip && \
pip3 install --upgrade pip
# Create required volumes
VOLUME /var/log
VOLUME /srv/data
# Set environment
ENV TEST_ENV=/srv/data
COPY fetcher.py /fetcher.py
# Add crontab file in the cron directory
ADD crontab /etc/cron.d/cron-fetcher
# Give execution rights on the cron job
RUN chmod 0644 /etc/cron.d/cron-fetcher
# Create the log file to be able to run tail
RUN touch /var/log/cron.log
# Apply cron job
RUN crontab /etc/cron.d/cron-fetcher
# Run the command on container startup
CMD ["cron", "-f"]
кронтаб
# placed in /etc/cron.d
* * * * * root python3 /fetcher.py >> /var/log/fetcher.log
fetcher.py
#!/usr/bin/env python
import urllib.request
# python script which needs an environment variable and runs as a cron job
import datetime
import os
test_environ = os.environ["TEST_ENV"]
print ("Cron job has run at {0} with environment variable '{1}'".format(datetime.datetime.now(), test_environ))
host_path = test_environ
url = 'http://winterolympicsmedals.com/medals.csv'
response = urllib.request.urlopen(url)
html = response.read()
filename = "{0}/data.csv".format(host_path)
with open(filename, 'wb') as f:
f.write(html)
Почему не работает cronjob?