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###############################################################################
# Copyright (c) 2017 Koren Lev (Cisco Systems), Yaron Yogev (Cisco Systems) #
# and others #
# #
# All rights reserved. This program and the accompanying materials #
# are made available under the terms of the Apache License, Version 2.0 #
# which accompanies this distribution, and is available at #
# http://www.apache.org/licenses/LICENSE-2.0 #
###############################################################################
import re
from discover.fetchers.aci.aci_access import AciAccess, aci_config_required
from utils.inventory_mgr import InventoryMgr
from utils.util import decode_aci_dn, encode_aci_dn, get_object_path_part
# Fetches and adds to database:
# 1. ACI Switch
#
# Returns:
# 1. ACI Switch pnic that belongs to the ACI Switch (mentioned above)
# and is connected to Calipso host pnic.
class AciFetchSwitchPnic(AciAccess):
def __init__(self):
super().__init__()
self.inv = InventoryMgr()
def fetch_pnics_by_mac_address(self, mac_address):
mac_filter = "eq(epmMacEp.addr,\"{}\")".format(mac_address)
# We are only interested in Ethernet interfaces
pnic_filter = "wcard(epmMacEp.ifId, \"eth\")"
query_filter = {"query-target-filter":
"and({},{})".format(mac_filter, pnic_filter)}
pnics = self.fetch_objects_by_class("epmMacEp", query_filter)
return [pnic["attributes"] for pnic in pnics]
def fetch_switch_by_id(self, switch_id):
dn = "/".join((switch_id, "sys"))
response = self.fetch_mo_data(dn)
# Unwrap switches
switch_data = self.get_objects_by_field_names(response, "topSystem",
"attributes")
return switch_data[0] if switch_data else None
def fetch_client_endpoints(self, mac_address):
mac_filter = "eq(fvCEp.mac,\"{}\")".format(mac_address)
query_params = {
"rsp-subtree": "children",
"query-target-filter": mac_filter
}
endpoints = self.fetch_objects_by_class("fvCEp", query_params)
results = []
for endpoint in endpoints:
result = endpoint["attributes"]
result["fvRsCEpToPathEp"] = []
for path in filter(lambda child: "fvRsCEpToPathEp" in child,
endpoint.get("children", [])):
result["fvRsCEpToPathEp"].append(path["fvRsCEpToPathEp"]["attributes"])
results.append(result)
return results
@aci_config_required(default=[])
def get(self, pnic_id):
environment = self.get_env()
pnic = self.inv.get_by_id(environment=environment, item_id=pnic_id)
if not pnic:
return []
mac_address = pnic.get("mac_address")
if not mac_address:
return []
# Query ACI for related switch pnic
leaf_pnics = self.fetch_pnics_by_mac_address(mac_address)
if not leaf_pnics:
return []
leaf_pnic = leaf_pnics[0]
# Prepare and save switch data in inventory
leaf_id_match = re.match("topology/(.+)/sys", leaf_pnic["dn"])
if not leaf_id_match:
raise ValueError("Failed to fetch leaf switch id from pnic dn: {}"
.format(leaf_pnic["dn"]))
aci_leaf_id = leaf_id_match.group(1)
leaf_data = self.fetch_switch_by_id(aci_leaf_id)
if not leaf_data:
self.log.warning("No switch found for switch pnic dn: {}"
.format(leaf_pnic["dn"]))
return []
db_leaf_id = "-".join(("switch", encode_aci_dn(aci_leaf_id),
leaf_data["role"]))
if not self.inv.get_by_id(environment, db_leaf_id):
leaf_json = {
"id": db_leaf_id,
"ip_address": leaf_data["address"],
"type": "switch",
"switch": db_leaf_id,
"aci_document": leaf_data
}
# Region name is the same as region id
region_id = get_object_path_part(pnic["name_path"], "Regions")
region = self.inv.get_by_id(environment, region_id)
self.inv.save_inventory_object(o=leaf_json, parent=region,
environment=environment)
# Prepare pnic json for results list
fvCEp = self.fetch_client_endpoints(mac_address)
db_pnic_id = "-".join([db_leaf_id,
encode_aci_dn(leaf_pnic["ifId"]),
mac_address])
pnic_json = {
"id": db_pnic_id,
"object_name": leaf_pnic["ifId"],
"type": "switch_pnic",
"role": "hostlink",
"parent_id": db_leaf_id,
"parent_type": "switch",
"mac_address": mac_address,
"switch": db_leaf_id,
"aci_document": leaf_pnic,
"fvCEp": fvCEp
}
return [pnic_json]
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