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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 |
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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) | ||
|
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@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, | ||
) | ||
|
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# 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) | ||
|
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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 | ||
) | ||
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return weight_map, weight_so_far | ||
|
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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"] | ||
|
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if instance.state == "terminated": | ||
continue | ||
|
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# stop when we hit the target capacity | ||
if new_fulfilled_capacity <= self.target_capacity: | ||
break | ||
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instance_ids.append(instance.id) | ||
new_fulfilled_capacity -= 1 | ||
|
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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 = {} | ||
|
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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, | ||
): | ||
|
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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 | ||
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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 | ||
|
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def describe_fleets(self, fleet_ids): | ||
fleets = self.fleets.values() | ||
|
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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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