butt
butt
, of course, stands for Better Unified Time-Driven Triggering. butt
is a KISS approach to crontab-like job scheduling. butt
was born out of a (/my?) frustration about the big gap between a lightweight crontab and full-fledged solutions like Airflow.
butt
aims to be a KISS approach to job scheduling. Focus is on the KISS approach not to necessarily do this in the most robust way possible.
Getting started
Fetch the latest version for your system below.
darwin-arm64 |
darwin-amd64 |
linux-386 |
linux-arm64 |
linux-amd64
You can (for example) fetch it like below, make it executable and run it. Optionally put the butt
on your PATH
.
curl https://storage.googleapis.com/better-unified/darwin/amd64/butt -o butt
chmod +x butt
./butt
Create a schedule specification using the below YAML structure:
jobs:
my_job:
command: date
cron: "* * * * *"
triggers:
- another_job
another_job:
command:
- /bin/bash
- -c
- "sleep 2; echo bar"
foo_job:
command:
- ls
- .
cron: "* * * * *"
coffee_alert:
command: this fails
cron: "* * * * *"
retries: 3
If your command
requires arguments, please make sure to pass them as an array like in foo_job
.
Scheduler
The core of butt
consists of a scheduler that uses a schedule specified in a yaml
file to triggers jobs when they are due.
You can launch the scheduler via:
butt run ./path/to/my-schedule.yaml
Check out butt run --help
for configuration options.
UI
butt
ships with a terminal ui you can launch via:
butt ui
The UI allows to get a quick overview on jobs that have run, that error'd and their logs. It basically does this by fetching the state of the scheduler and by reading the logs that (per job) get written to $HOME/.butt/
. Note that you can ignore these logs, output of jobs will always go to stdout as well.
The UI requires the scheduler to be up and running.
Docker
Check out the Dockerfile
for an example on how to set up butt
within the context of a Docker image.
Acknowledgements
Thanks goes to:
- gronx: for allowing me not to worry about CRON strings.
- Charm: for their bubble-icious TUI libraries.
- Freddy: for cracking them butt jokes.
- Murilo: for asking me about my butt.