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EC2: Add ec2 fleets basic api (#5367)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,313 @@ | ||
| from collections import defaultdict | ||
|
|
||
| from moto.ec2.models.spot_requests import SpotFleetLaunchSpec | ||
|
|
||
| from .core import TaggedEC2Resource | ||
| from ..utils import ( | ||
| random_fleet_id, | ||
| convert_tag_spec, | ||
| ) | ||
|
|
||
|
|
||
| class Fleet(TaggedEC2Resource): | ||
| def __init__( | ||
| self, | ||
| ec2_backend, | ||
| fleet_id, | ||
| on_demand_options, | ||
| spot_options, | ||
| target_capacity_specification, | ||
| launch_template_configs, | ||
| excess_capacity_termination_policy, | ||
| replace_unhealthy_instances, | ||
| terminate_instances_with_expiration, | ||
| fleet_type, | ||
| valid_from, | ||
| valid_until, | ||
| tag_specifications, | ||
| ): | ||
|
|
||
| self.ec2_backend = ec2_backend | ||
| self.id = fleet_id | ||
| self.spot_options = spot_options | ||
| self.on_demand_options = on_demand_options | ||
| self.target_capacity_specification = target_capacity_specification | ||
| self.launch_template_configs = launch_template_configs | ||
| self.excess_capacity_termination_policy = ( | ||
| excess_capacity_termination_policy or "termination" | ||
| ) | ||
| self.replace_unhealthy_instances = replace_unhealthy_instances | ||
| self.terminate_instances_with_expiration = terminate_instances_with_expiration | ||
| self.fleet_type = fleet_type | ||
| self.valid_from = valid_from | ||
| self.valid_until = valid_until | ||
| tag_map = convert_tag_spec(tag_specifications).get("fleet", {}) | ||
| self.add_tags(tag_map) | ||
| self.tags = self.get_tags() | ||
|
|
||
| self.state = "active" | ||
| self.fulfilled_capacity = 0.0 | ||
| self.fulfilled_on_demand_capacity = 0.0 | ||
| self.fulfilled_spot_capacity = 0.0 | ||
|
|
||
| self.launch_specs = [] | ||
|
|
||
| launch_specs_from_config = [] | ||
| for config in launch_template_configs or []: | ||
| spec = config["LaunchTemplateSpecification"] | ||
| if "LaunchTemplateId" in spec: | ||
| launch_template = self.ec2_backend.get_launch_template( | ||
| template_id=spec["LaunchTemplateId"] | ||
| ) | ||
| elif "LaunchTemplateName" in spec: | ||
| launch_template = self.ec2_backend.get_launch_template_by_name( | ||
| name=spec["LaunchTemplateName"] | ||
| ) | ||
| else: | ||
| continue | ||
| launch_template_data = launch_template.latest_version().data | ||
| new_launch_template = launch_template_data.copy() | ||
| if config.get("Overrides"): | ||
| for override in config["Overrides"]: | ||
| new_launch_template.update(override) | ||
| launch_specs_from_config.append(new_launch_template) | ||
|
|
||
| for spec in launch_specs_from_config: | ||
| tag_spec_set = spec.get("TagSpecification", []) | ||
| tags = convert_tag_spec(tag_spec_set) | ||
| self.launch_specs.append( | ||
| SpotFleetLaunchSpec( | ||
| ebs_optimized=spec.get("EbsOptimized"), | ||
| group_set=spec.get("GroupSet", []), | ||
| iam_instance_profile=spec.get("IamInstanceProfile"), | ||
| image_id=spec["ImageId"], | ||
| instance_type=spec["InstanceType"], | ||
| key_name=spec.get("KeyName"), | ||
| monitoring=spec.get("Monitoring"), | ||
| spot_price=spec.get("SpotPrice"), | ||
| subnet_id=spec.get("SubnetId"), | ||
| tag_specifications=tags, | ||
| user_data=spec.get("UserData"), | ||
| weighted_capacity=spec.get("WeightedCapacity", 1), | ||
| ) | ||
| ) | ||
|
|
||
| self.spot_requests = [] | ||
| self.on_demand_instances = [] | ||
| default_capacity = ( | ||
| target_capacity_specification.get("DefaultTargetCapacityType") | ||
| or "on-demand" | ||
| ) | ||
| self.target_capacity = int( | ||
| target_capacity_specification.get("TotalTargetCapacity") | ||
| ) | ||
| self.spot_target_capacity = int( | ||
| target_capacity_specification.get("SpotTargetCapacity") | ||
| ) | ||
| if self.spot_target_capacity > 0: | ||
| self.create_spot_requests(self.spot_target_capacity) | ||
| self.on_demand_target_capacity = int( | ||
| target_capacity_specification.get("OnDemandTargetCapacity") | ||
| ) | ||
| if self.on_demand_target_capacity > 0: | ||
| self.create_on_demand_requests(self.on_demand_target_capacity) | ||
|
|
||
| remaining_capacity = self.target_capacity - self.fulfilled_capacity | ||
| if remaining_capacity > 0: | ||
| if default_capacity == "on-demand": | ||
| self.create_on_demand_requests(remaining_capacity) | ||
| elif default_capacity == "spot": | ||
| self.create_spot_requests(remaining_capacity) | ||
|
|
||
| @property | ||
| def physical_resource_id(self): | ||
| return self.id | ||
|
|
||
| def create_spot_requests(self, weight_to_add): | ||
| weight_map, added_weight = self.get_launch_spec_counts(weight_to_add) | ||
| for launch_spec, count in weight_map.items(): | ||
| requests = self.ec2_backend.request_spot_instances( | ||
| price=launch_spec.spot_price, | ||
| image_id=launch_spec.image_id, | ||
| count=count, | ||
| spot_instance_type="persistent", | ||
| valid_from=None, | ||
| valid_until=None, | ||
| launch_group=None, | ||
| availability_zone_group=None, | ||
| key_name=launch_spec.key_name, | ||
| security_groups=launch_spec.group_set, | ||
| user_data=launch_spec.user_data, | ||
| instance_type=launch_spec.instance_type, | ||
| placement=None, | ||
| kernel_id=None, | ||
| ramdisk_id=None, | ||
| monitoring_enabled=launch_spec.monitoring, | ||
| subnet_id=launch_spec.subnet_id, | ||
| spot_fleet_id=self.id, | ||
| tags=launch_spec.tag_specifications, | ||
| ) | ||
| self.spot_requests.extend(requests) | ||
| self.fulfilled_capacity += added_weight | ||
| return self.spot_requests | ||
|
|
||
| def create_on_demand_requests(self, weight_to_add): | ||
| weight_map, added_weight = self.get_launch_spec_counts(weight_to_add) | ||
| for launch_spec, count in weight_map.items(): | ||
| reservation = self.ec2_backend.add_instances( | ||
| image_id=launch_spec.image_id, | ||
| count=count, | ||
| instance_type=launch_spec.instance_type, | ||
| is_instance_type_default=False, | ||
| key_name=launch_spec.key_name, | ||
| security_group_names=launch_spec.group_set, | ||
| user_data=launch_spec.user_data, | ||
| placement=None, | ||
| kernel_id=None, | ||
| ramdisk_id=None, | ||
| monitoring_enabled=launch_spec.monitoring, | ||
| subnet_id=launch_spec.subnet_id, | ||
| fleet_id=self.id, | ||
| tags=launch_spec.tag_specifications, | ||
| ) | ||
|
|
||
| # get the instance from the reservation | ||
| instance = reservation.instances[0] | ||
| self.on_demand_instances.append( | ||
| { | ||
| "id": reservation.id, | ||
| "instance": instance, | ||
| } | ||
| ) | ||
| self.fulfilled_capacity += added_weight | ||
| return self.on_demand_instances | ||
|
|
||
| def get_launch_spec_counts(self, weight_to_add): | ||
| weight_map = defaultdict(int) | ||
|
|
||
| weight_so_far = 0 | ||
| if ( | ||
| self.spot_options | ||
| and self.spot_options["AllocationStrategy"] == "diversified" | ||
| ): | ||
| launch_spec_index = 0 | ||
| while True: | ||
| launch_spec = self.launch_specs[ | ||
| launch_spec_index % len(self.launch_specs) | ||
| ] | ||
| weight_map[launch_spec] += 1 | ||
| weight_so_far += launch_spec.weighted_capacity | ||
| if weight_so_far >= weight_to_add: | ||
| break | ||
| launch_spec_index += 1 | ||
| else: # lowestPrice | ||
| cheapest_spec = sorted( | ||
| # FIXME: change `+inf` to the on demand price scaled to weighted capacity when it's not present | ||
| self.launch_specs, | ||
| key=lambda spec: float(spec.spot_price or "+inf"), | ||
| )[0] | ||
| weight_so_far = weight_to_add + ( | ||
| weight_to_add % cheapest_spec.weighted_capacity | ||
| ) | ||
| weight_map[cheapest_spec] = int( | ||
| weight_so_far // cheapest_spec.weighted_capacity | ||
| ) | ||
|
|
||
| return weight_map, weight_so_far | ||
|
|
||
| def terminate_instances(self): | ||
| instance_ids = [] | ||
| new_fulfilled_capacity = self.fulfilled_capacity | ||
| for req in self.spot_requests + self.on_demand_instances: | ||
| instance = None | ||
| try: | ||
| instance = req.instance | ||
| except AttributeError: | ||
| instance = req["instance"] | ||
|
|
||
| if instance.state == "terminated": | ||
| continue | ||
|
|
||
| # stop when we hit the target capacity | ||
| if new_fulfilled_capacity <= self.target_capacity: | ||
| break | ||
|
|
||
| instance_ids.append(instance.id) | ||
| new_fulfilled_capacity -= 1 | ||
|
|
||
| self.spot_requests = [ | ||
| req for req in self.spot_requests if req.instance.id not in instance_ids | ||
| ] | ||
| self.on_demand_instances = [ | ||
| req | ||
| for req in self.on_demand_instances | ||
| if req["instance"].id not in instance_ids | ||
| ] | ||
| self.ec2_backend.terminate_instances(instance_ids) | ||
|
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||
|
|
||
| class FleetsBackend: | ||
| def __init__(self): | ||
| self.fleets = {} | ||
|
|
||
| def create_fleet( | ||
| self, | ||
| on_demand_options, | ||
| spot_options, | ||
| target_capacity_specification, | ||
| launch_template_configs, | ||
| excess_capacity_termination_policy, | ||
| replace_unhealthy_instances, | ||
| terminate_instances_with_expiration, | ||
| fleet_type, | ||
| valid_from, | ||
| valid_until, | ||
| tag_specifications, | ||
| ): | ||
|
|
||
| fleet_id = random_fleet_id() | ||
| fleet = Fleet( | ||
| self, | ||
| fleet_id, | ||
| on_demand_options, | ||
| spot_options, | ||
| target_capacity_specification, | ||
| launch_template_configs, | ||
| excess_capacity_termination_policy, | ||
| replace_unhealthy_instances, | ||
| terminate_instances_with_expiration, | ||
| fleet_type, | ||
| valid_from, | ||
| valid_until, | ||
| tag_specifications, | ||
| ) | ||
| self.fleets[fleet_id] = fleet | ||
| return fleet | ||
|
|
||
| def get_fleet(self, fleet_id): | ||
| return self.fleets.get(fleet_id) | ||
|
|
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| def describe_fleet_instances(self, fleet_id): | ||
| fleet = self.get_fleet(fleet_id) | ||
| if not fleet: | ||
| return [] | ||
| return fleet.spot_requests + fleet.on_demand_instances | ||
|
|
||
| def describe_fleets(self, fleet_ids): | ||
| fleets = self.fleets.values() | ||
|
|
||
| if fleet_ids: | ||
| fleets = [fleet for fleet in fleets if fleet.id in fleet_ids] | ||
|
|
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| return fleets | ||
|
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| def delete_fleets(self, fleet_ids, terminate_instances): | ||
| fleets = [] | ||
| for fleet_id in fleet_ids: | ||
| fleet = self.fleets[fleet_id] | ||
| if terminate_instances: | ||
| fleet.target_capacity = 0 | ||
| fleet.terminate_instances() | ||
| fleets.append(fleet) | ||
| fleet.state = "deleted" | ||
| return fleets |
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