netbox-docker/startup_scripts/460_cables.py

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import sys
from typing import Tuple
from circuits.models import Circuit, CircuitTermination, ProviderNetwork
from dcim.models import (
Cable,
ConsolePort,
ConsoleServerPort,
FrontPort,
Interface,
PowerFeed,
PowerOutlet,
PowerPanel,
PowerPort,
RearPort,
Site,
)
from django.contrib.contenttypes.models import ContentType
from django.db.models import Q
from startup_script_utils import load_yaml
CONSOLE_PORT_TERMINATION = ContentType.objects.get_for_model(ConsolePort)
CONSOLE_SERVER_PORT_TERMINATION = ContentType.objects.get_for_model(ConsoleServerPort)
FRONT_PORT_TERMINATION = ContentType.objects.get_for_model(FrontPort)
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REAR_PORT_TERMINATION = ContentType.objects.get_for_model(RearPort)
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FRONT_AND_REAR = [FRONT_PORT_TERMINATION, REAR_PORT_TERMINATION]
POWER_PORT_TERMINATION = ContentType.objects.get_for_model(PowerPort)
POWER_OUTLET_TERMINATION = ContentType.objects.get_for_model(PowerOutlet)
POWER_FEED_TERMINATION = ContentType.objects.get_for_model(PowerFeed)
POWER_TERMINATIONS = [POWER_PORT_TERMINATION, POWER_OUTLET_TERMINATION, POWER_FEED_TERMINATION]
VIRTUAL_INTERFACES = ["bridge", "lag", "virtual"]
def get_termination_object(params: dict, side: str):
klass = params.pop(f"termination_{side}_class")
name = params.pop(f"termination_{side}_name", None)
device = params.pop(f"termination_{side}_device", None)
feed_params = params.pop(f"termination_{side}_feed", None)
circuit_params = params.pop(f"termination_{side}_circuit", {})
if name and device:
termination = klass.objects.get(name=name, device__name=device)
return termination
elif feed_params:
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q = {
"name": feed_params["power_panel"]["name"],
"site__name": feed_params["power_panel"]["site"],
}
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power_panel = PowerPanel.objects.get(**q)
termination = PowerFeed.objects.get(name=feed_params["name"], power_panel=power_panel)
return termination
elif circuit_params:
circuit = Circuit.objects.get(cid=circuit_params.pop("cid"))
term_side = circuit_params.pop("term_side").upper()
site_name = circuit_params.pop("site", None)
provider_network = circuit_params.pop("provider_network", None)
if site_name:
circuit_params["site"] = Site.objects.get(name=site_name)
elif provider_network:
circuit_params["provider_network"] = ProviderNetwork.objects.get(name=provider_network)
else:
raise ValueError(
f"⚠️ Missing one of required parameters: 'site' or 'provider_network' "
f"for side {term_side} of circuit {circuit}"
)
termination, created = CircuitTermination.objects.get_or_create(
circuit=circuit, term_side=term_side, defaults=circuit_params
)
if created:
print(f"⚡ Created new CircuitTermination {termination}")
return termination
raise ValueError(
f"⚠️ Missing parameters for termination_{side}. "
"Need termination_{side}_name AND termination_{side}_device OR termination_{side}_circuit"
)
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def get_termination_class_by_name(port_class: str):
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if not port_class:
return Interface
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return globals()[port_class]
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def cable_in_cables(term_a: tuple, term_b: tuple) -> bool:
"""Check if cable exist for given terminations.
Each tuple should consist termination object and termination type
"""
cable = Cable.objects.filter(
Q(
termination_a_id=term_a[0].id,
termination_a_type=term_a[1],
termination_b_id=term_b[0].id,
termination_b_type=term_b[1],
)
| Q(
termination_a_id=term_b[0].id,
termination_a_type=term_b[1],
termination_b_id=term_a[0].id,
termination_b_type=term_a[1],
)
)
return cable.exists()
def check_termination_types(type_a, type_b) -> Tuple[bool, str]:
if type_a in POWER_TERMINATIONS and type_b in POWER_TERMINATIONS:
if type_a == type_b:
return False, "Can't connect the same power terminations together"
elif (
type_a == POWER_OUTLET_TERMINATION
and type_b == POWER_FEED_TERMINATION
or type_a == POWER_FEED_TERMINATION
and type_b == POWER_OUTLET_TERMINATION
):
return False, "PowerOutlet can't be connected with PowerFeed"
elif type_a in POWER_TERMINATIONS or type_b in POWER_TERMINATIONS:
return False, "Can't mix power terminations with port terminations"
elif type_a in FRONT_AND_REAR or type_b in FRONT_AND_REAR:
return True, ""
elif (
type_a == CONSOLE_PORT_TERMINATION
and type_b != CONSOLE_SERVER_PORT_TERMINATION
or type_b == CONSOLE_PORT_TERMINATION
and type_a != CONSOLE_SERVER_PORT_TERMINATION
):
return False, "ConsolePorts can only be connected to ConsoleServerPorts or Front/Rear ports"
return True, ""
def get_cable_name(termination_a: tuple, termination_b: tuple) -> str:
"""Returns name of a cable in format:
device_a interface_a <---> interface_b device_b
or for circuits:
circuit_a termination_a <---> termination_b circuit_b
"""
cable_name = []
for is_side_b, termination in enumerate([termination_a, termination_b]):
try:
power_panel_id = getattr(termination[0], "power_panel_id", None)
if power_panel_id:
power_feed = PowerPanel.objects.get(id=power_panel_id)
segment = [f"{power_feed}", f"{termination[0]}"]
else:
segment = [f"{termination[0].device}", f"{termination[0]}"]
except AttributeError:
segment = [f"{termination[0].circuit.cid}", f"{termination[0]}"]
if is_side_b:
segment.reverse()
cable_name.append(" ".join(segment))
return " <---> ".join(cable_name)
def check_interface_types(*args):
for termination in args:
try:
if termination.type in VIRTUAL_INTERFACES:
raise Exception(
f"⚠️ Virtual interfaces are not supported for cabling. "
f"Termination {termination.device} {termination} {termination.type}"
)
except AttributeError:
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# CircuitTermination doesn't have a type field
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pass
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def check_terminations_are_free(*args):
any_failed = False
for termination in args:
if termination.cable_id:
any_failed = True
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print(
f"⚠️ Termination {termination} is already occupied "
f"with cable #{termination.cable_id}"
)
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if any_failed:
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raise Exception("⚠️ At least one end of the cable is already occupied.")
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cables = load_yaml("/opt/netbox/initializers/cables.yml")
if cables is None:
sys.exit()
for params in cables:
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params["termination_a_class"] = get_termination_class_by_name(params.get("termination_a_class"))
params["termination_b_class"] = get_termination_class_by_name(params.get("termination_b_class"))
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term_a = get_termination_object(params, side="a")
term_b = get_termination_object(params, side="b")
check_interface_types(term_a, term_b)
term_a_ct = ContentType.objects.get_for_model(term_a)
term_b_ct = ContentType.objects.get_for_model(term_b)
types_ok, msg = check_termination_types(term_a_ct, term_b_ct)
cable_name = get_cable_name((term_a, term_a_ct), (term_b, term_b_ct))
if not types_ok:
print(f"⚠️ Invalid termination types for {cable_name}. {msg}")
continue
if cable_in_cables((term_a, term_a_ct), (term_b, term_b_ct)):
continue
check_terminations_are_free(term_a, term_b)
params["termination_a_id"] = term_a.id
params["termination_b_id"] = term_b.id
params["termination_a_type"] = term_a_ct
params["termination_b_type"] = term_b_ct
cable = Cable.objects.create(**params)
print(f"🧷 Created cable {cable} {cable_name}")