I have a problem working with AWS CDK JS Event Bridge Scheduler, I have a service catalog "ProductStack" and I defined the one-time scheduler in it, so ONLY when the user will provision that product - the scheduler will be created. Now, the problem is, I'm using js date for taking that provision time and adding 5 minutes to it, but it takes the build time of the whole CFN stack and not the provision time of the "ProductStack" defined in it. With this I end up with a situation, when the scheduler itself is created for ex. at 10:00, but it is set to be fired at 09:55. Here's the short definition for my scheduler:
this.scheduler = new CfnSchedule(this, `Something`, {
flexibleTimeWindow: { mode: 'OFF' },
scheduleExpression: `at(${ moment.utc().add(2, 'minutes').format('YYYY-MM-DDTHH:mm:ss') })`,
scheduleExpressionTimezone: TimeZone.ETC_UTC.timezoneName,
...
});
instead of moment.utc() I used date-fns and js simple new Date() as well, but all of them end up with the same result.
If your goal is to "do something after the stack is deployed", consider instead creating an EventBridge rule that listens to CREATE_COMPLETE stack events that CloudFormation emits to the default event bus. The rule would trigger a target (e.g. Lambda) that runs when the stack is created.
However, if you really need to create a one-time scheduled event relative to the stack deploy time, you could shift the work of creating the schedule to a Custom Resource. You'd write a Lambda with an SDK CreateSchedule command, passing the current time from the Lambda runtime. Hooked up as a Custom Function handler, the Lambda would be invoked at deploy time by CloudFormation.