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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 json
from discover.fetchers.api.api_access import ApiAccess
from discover.fetchers.db.db_access import DbAccess
class ApiFetchProjectHosts(ApiAccess, DbAccess):
def __init__(self):
super(ApiFetchProjectHosts, self).__init__()
def get(self, project_id):
if project_id != self.admin_project:
# do not scan hosts except under project 'admin'
return []
token = self.v2_auth_pwd(self.admin_project)
if not token:
return []
ret = []
for region in self.regions:
ret.extend(self.get_for_region(region, token))
return ret
def get_for_region(self, region, token):
endpoint = self.get_region_url(region, "nova")
ret = []
if not token:
return []
req_url = endpoint + "/os-availability-zone/detail"
headers = {
"X-Auth-Project-Id": self.admin_project,
"X-Auth-Token": token["id"]
}
response = self.get_url(req_url, headers)
if "status" in response and int(response["status"]) != 200:
return []
az_info = response["availabilityZoneInfo"]
hosts = {}
for doc in az_info:
az_hosts = self.get_hosts_from_az(doc)
for h in az_hosts:
if h["name"] in hosts:
# merge host_type data between AZs
existing_entry = hosts[h["name"]]
for t in h["host_type"]:
self.add_host_type(existing_entry, t, doc['zoneName'])
else:
hosts[h["name"]] = h
ret.append(h)
# get os_id for hosts using the os-hypervisors API call
req_url = endpoint + "/os-hypervisors"
response = self.get_url(req_url, headers)
if "status" in response and int(response["status"]) != 200:
return ret
if "hypervisors" not in response:
return ret
for h in response["hypervisors"]:
hvname = h["hypervisor_hostname"]
if '.' in hvname and hvname not in hosts:
hostname = hvname[:hvname.index('.')]
else:
hostname = hvname
try:
doc = hosts[hostname]
except KeyError:
# TBD - add error output
continue
doc["os_id"] = str(h["id"])
self.fetch_compute_node_ip_address(doc, hvname)
# get more network nodes details
self.fetch_network_node_details(ret)
return ret
def get_hosts_from_az(self, az):
ret = []
for h in az["hosts"]:
doc = self.get_host_details(az, h)
ret.append(doc)
return ret
def get_host_details(self, az, h):
# for hosts we use the name
services = az["hosts"][h]
doc = {
"id": h,
"host": h,
"name": h,
"zone": az["zoneName"],
"parent_type": "availability_zone",
"parent_id": az["zoneName"],
"services": services,
"host_type": []
}
if "nova-conductor" in services:
s = services["nova-conductor"]
if s["available"] and s["active"]:
self.add_host_type(doc, "Controller", az['zoneName'])
if "nova-compute" in services:
s = services["nova-compute"]
if s["available"] and s["active"]:
self.add_host_type(doc, "Compute", az['zoneName'])
return doc
# fetch more details of network nodes from neutron DB agents table
def fetch_network_node_details(self, docs):
hosts = {}
for doc in docs:
hosts[doc["host"]] = doc
query = """
SELECT DISTINCT host, host AS id, configurations
FROM {}.agents
WHERE agent_type IN ('Metadata agent', 'DHCP agent', 'L3 agent')
""".format(self.neutron_db)
results = self.get_objects_list(query, "")
for r in results:
host = hosts[r["host"]]
host["config"] = json.loads(r["configurations"])
self.add_host_type(host, "Network", '')
# fetch ip_address from nova.compute_nodes table if possible
def fetch_compute_node_ip_address(self, doc, h):
query = """
SELECT host_ip AS ip_address
FROM nova.compute_nodes
WHERE hypervisor_hostname = %s
"""
results = self.get_objects_list_for_id(query, "", h)
for db_row in results:
doc.update(db_row)
def add_host_type(self, doc, type, zone):
if not type in doc["host_type"]:
doc["host_type"].append(type)
if type == 'Compute':
doc['zone'] = zone
doc['parent_id'] = zone
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