blue271828/crond repository overview
Cron daemon Docker image
This image contains a crond. You can set jobs via environment variables.
Usage
This project provides container images on Docker Hub .
$ docker pull blue271828/crond
Environment variables
When you launch the image, you can configure some options.
| Variable | Default | Description |
|---|---|---|
TZ | UTC | Change the time zone in the container. Refer to List of tz database time zones If you set an arbitrary time zone. |
LOG_LEVEL | 8 | Set log level for crond. This corresponds to crond -l option. |
LOG_FILE | - | Set a log file for crond. This corresponds to crond -L option. |
CRONTAB | - | Set crontab settings. If you set this variable. User's crontab file is overwritten on launch. |
CRONTAB_FILE | - | Set crontab settings by file. This file is ignored if you set CRONTAB env. |
Example
A container will output “hello crond!” every minute when you type the following command.
$ docker run -it -e CRONTAB='* * * * * echo "hello crond!"' blue271828/crond
If you want to run with Docker Compose, the compose file looks like below.
version: '3'
services:
crond:
image: blue271828/crond
environment:
TZ: Asia/Tokyo
LOG_LEVEL: 1
LOG_FILE: /var/log/crond/crond.log
CRONTAB: |
* * * * * echo "hello crond!"
* * * * * date
volumes:
- ./crond:/var/log/crond
Testing
You can test manually with the below command. This project is using dgoss (dgoss is docker wrapper around Goss) for testing. Before deploying a new docker image to Docker Hub, Automated builds kicks this testing script.
$ docker-compose -f docker-compose.test.yml run sut
Tag summary
Content type
Image
Digest
Size
16.8 MB
Last updated
almost 7 years ago
docker pull blue271828/crond