Image to run generic cron tasks.

Included packages/software

dcron  
curl   
wget
git  
rsync  
ca-certificates  

Crond

Image is designed to run crontabs as root. This means that your cron tab file needs to be placed in specific locations

crontab file locations:

• /etc/crontabs/root
  • contains run-parts schedules
• /etc/cron.d/
  • put in custom crontab files here

run-parts files:

• /etc/periodic/15min/
• /etc/periodic/hourly/
• /etc/periodic/daily/
• /etc/periodic/weekly/
• /etc/periodic/monthly/

run-parts files are basically sh files without the extension. Here are some tips when making these files:

• Make sure the script is executable (chmod a+x [scriptname])
• Make sure the first line of the script is: #!/bin/sh
• The file name cannot have an extension!

Example Run Command

docker run -d  \
--name my-crond \
--restart="unless-stopped" \
--mount type=bind,source=/etc/localtime,target=/etc/localtime,readonly \
--mount type=bind,source=./myscript,target="/etc/periodic/15min/myscript",readonly \
wolfereign/crond:latest

The above command will bind mount a run-parts script/file to the containers directory that gets run every 15 minutes.

Example Script (myscript)

#!/bin/sh
echo "hello world!!" >> /root/myscript.log