A flexible task runner designed for docker based cloud environments.
In Chronos you can add tasks to run at specific times defined in cron syntax. Each task can have multiple steps. Steps are executed in order and
stderr are stored for each execution.
You need to run both to have an operational application. For instruction on how to run the API service, check out the api repo
docker run -p 8080:8080 -it asbjornenge/chronos-app:latest
Setting up tasks are fairly staightforward. Give the task a
name and set a
cron for it to run.
NB! You need to
unpause the tasks before it is sceduled to run. You do that by clicking the top right icon from task details (click the task to get there).
Steps require a bit more input:
Name : Name of the step Command : Command to run Order : Order of execution (steps are executed in order when task runs) Timeout : Specify a timeout for the task in ms (task is killed if this timeout is surpassed)
Name : Dump database Command : docker -H tcp://docker-host:4243 run --rm -v /var/lib/docker/data/backup:/backup postgres:9.6 pg_dump -h postgres -U postgres demo -f /backup/demo.sql Order : 1 Timeout : 10000
NB! Steps are executed in the
api container. It's
alpine based and contains very few tools. However, it does contain the
docker cli. Which means you can run most anything
-H tcp://docker-host:port for the actual execution to take place
Other relevant steps to add to the example above could be;
- Upload to S3