The Chance and Simple schedulers are now deprecated. To replicate their behaviour, use the FilterScheduler instead. Both behaviours use the following setting in common: scheduler_driver = cinder.scheduler.filter_scheduler.FilterScheduler scheduler_default_filters = [‘AvailabilityZoneFilter’, ‘CapacityFilter’, ‘CapabilitiesFilter’] To replicate the behaviour of the Chance scheduler, add the following parameter: scheduler_default_weighers = ‘ChanceWeigher’ To replicate the behavior of the Simple scheduler, use the following instead: scheduler_default_weighers = ‘AllocatedCapacityWeigher’ allocated_capacity_weight_multiplier = -1.0