Invoke your functions on a cron schedule

This is a cron event connector for OpenFaaS. This was built to provide a timer interface to trigger OpenFaaS functions. Also checkout OpenFaaS docs on cron for other methods on how you can run functions triggered by cron.

This project was forked from zeerorg/cron-connector to enable prompt updates and patches for end-users.

How to Use

First, deploy OpenFaaS with faasd or Kubernetes

Deploy the connector for Kubernetes

For Kubernetes, see: Scheduling function runs

Deploy the connector for faasd

For faasd, see Serverless For Everyone Else.

Trigger a function from Cron

The function should have 2 annotations:

1. topic annotation should be cron-function.
2. schedule annotation should be the cron schedule on which to invoke function

For example, we may have a function "nodeinfo" which we want to invoke every 5 minutes:

Deploy via the CLI:

faas-cli store deploy nodeinfo \
  --annotation schedule="*/5 * * * *" \
  --annotation topic=cron-function

Or via stack.yml:

functions:
  nodeinfo:
    image: functions/nodeinfo
    annotations:
      topic: cron-function
      schedule: "*/5 * * * *"

You can learn how to create and test the Cron syntax here.