Instance Scheduler should allow for instance type flexibility

[playphil]

trafficstars

Is your feature request related to a problem? Please describe. Sometimes for a single specified instance type there is not enough capacity in the AZ. This results in an Insufficient Capacity Error (ICE). This occurs more frequently for peculiar types. May also occur during periods of high demand. If there is impact in another AZ or other region, there becomes a thundering herd of many requests to launch instances so demand may exceed available capacity. To avoid ICE's it's advisable for automation to be flexible as to which AZ and also flexible as to what type is deemed acceptable for launch.

Launch Templates can specify multiple possible instance types https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/create-launch-template.html#lt-instance-type

And Fleets in ec2 help flexibility by leveraging things like "attribute based instance type selection". https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-fleet-attribute-based-instance-type-selection.html

Describe the feature you'd like Instance Scheduler solution should allow for optional use of ec2 Fleets and Launch Templates, as these are standard mechanisms that allow instance type flexibility and AZ flexibility. This will help keep everyone get back to work by launching their next preferred instance types on days when their first choice is not available.

Additional context