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get_ome_vlans.py
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get_ome_vlans.py
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#
# _author_ = Greg Bowersock <Greg.Bowersock@Dell.com>
# _author_ = Trevor Squillario <Trevor.Squillario@Dell.com>
# _author_ = Grant Curell <grant_curell@dell.com>
#
# Copyright (c) 2022 Dell EMC Corporation
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
"""
#### Synopsis
Retrieves data regarding the VLANs on an OME instance.
#### Description
The --out-file argument is optional. If specified output will go to screen and a file. Otherwise it only prints to
screen.
For authentication X-Auth is used over Basic Authentication
Note that the credentials entered are not stored to disk.
#### Example
`python get_ome_vlans.py --ip <xx> --user <username> --password <pwd> --out-file <exported csv file>`
"""
import argparse
import csv
import json
import sys
from argparse import RawTextHelpFormatter
from getpass import getpass
from pprint import pprint
from urllib.parse import urlparse
try:
import urllib3
import requests
except ModuleNotFoundError:
print("This program requires urllib3 and requests. To install them on most systems run `pip install requests"
"urllib3`")
sys.exit(0)
def authenticate(ome_ip_address: str, ome_username: str, ome_password: str) -> dict:
"""
Authenticates with OME and creates a session
Args:
ome_ip_address: IP address of the OME server
ome_username: Username for OME
ome_password: OME password
Returns: A dictionary of HTTP headers
Raises:
Exception: A generic exception in the event of a failure to connect
"""
authenticated_headers = {'content-type': 'application/json'}
session_url = 'https://%s/api/SessionService/Sessions' % ome_ip_address
user_details = {'UserName': ome_username,
'Password': ome_password,
'SessionType': 'API'}
try:
session_info = requests.post(session_url, verify=False,
data=json.dumps(user_details),
headers=authenticated_headers)
except requests.exceptions.ConnectionError:
print("Failed to connect to OME. This typically indicates a network connectivity problem. Can you ping OME?")
sys.exit(0)
if session_info.status_code == 201:
authenticated_headers['X-Auth-Token'] = session_info.headers['X-Auth-Token']
return authenticated_headers
print("There was a problem authenticating with OME. Are you sure you have the right username, password, "
"and IP?")
raise Exception("There was a problem authenticating with OME. Are you sure you have the right username, "
"password, and IP?")
def get_data(authenticated_headers: dict, url: str, odata_filter: str = None, max_pages: int = None) -> dict:
"""
This function retrieves data from a specified URL. Get requests from OME return paginated data. The code below
handles pagination. This is the equivalent in the UI of a list of results that require you to go to different
pages to get a complete listing.
Args:
authenticated_headers: A dictionary of HTTP headers generated from an authenticated session with OME
url: The API url against which you would like to make a request
odata_filter: An optional parameter for providing an odata filter to run against the API endpoint.
max_pages: The maximum number of pages you would like to return
Returns: Returns a dictionary of data received from OME
"""
next_link_url = None
if odata_filter:
count_data = requests.get(url + '?$filter=' + odata_filter, headers=authenticated_headers, verify=False)
if count_data.status_code == 400:
print("Received an error while retrieving data from %s:" % url + '?$filter=' + odata_filter)
pprint(count_data.json()['error'])
return {}
count_data = count_data.json()
if count_data['@odata.count'] <= 0:
print("No results found!")
return {}
else:
count_data = requests.get(url, headers=authenticated_headers, verify=False).json()
if 'value' in count_data:
data = count_data['value']
else:
data = count_data
if '@odata.nextLink' in count_data:
# Grab the base URI
next_link_url = '{uri.scheme}://{uri.netloc}'.format(uri=urlparse(url)) + count_data['@odata.nextLink']
i = 1
while next_link_url is not None:
# Break if we have reached the maximum number of pages to be returned
if max_pages:
if i >= max_pages:
break
else:
i = i + 1
response = requests.get(next_link_url, headers=authenticated_headers, verify=False)
next_link_url = None
if response.status_code == 200:
requested_data = response.json()
if requested_data['@odata.count'] <= 0:
print("No results found!")
return {}
# The @odata.nextLink key is only present in data if there are additional pages. We check for it and if it
# is present we get a link to the page with the next set of results.
if '@odata.nextLink' in requested_data:
next_link_url = '{uri.scheme}://{uri.netloc}'.format(uri=urlparse(url)) + \
requested_data['@odata.nextLink']
if 'value' in requested_data:
data += requested_data['value']
else:
data += requested_data
else:
print("Unknown error occurred. Received HTTP response code: " + str(response.status_code) +
" with error: " + response.text)
raise Exception("Unknown error occurred. Received HTTP response code: " + str(response.status_code)
+ " with error: " + response.text)
return data
def get_networktypes(ome_base_uri: str, authenticated_headers: dict):
"""
Display the different types of network to which you can assign an OME VLAN
Args:
ome_base_uri: The base portion of the API URI. This is "https://<OME_IP>"
authenticated_headers: A dictionary of HTTP headers generated from an authenticated session with OME
"""
networktype_url = ome_base_uri + '/api/NetworkConfigurationService/NetworkTypes'
networktype_response = requests.get(networktype_url, headers=authenticated_headers, verify=False)
if networktype_response.status_code == 200 or networktype_response.status_code == 201:
networktype_data = networktype_response.json()
networktype_data = networktype_data['value']
for i in networktype_data:
print("Id: %s, Name: %s, Description: %s" % (i["Id"], i["Name"], i["Description"]))
else:
print("Unable to retrieve list from %s" % networktype_url)
def get_networks(ome_base_uri: str, authenticated_headers: dict, out_file: str = None):
"""
Enumerates the VLANs on the OME instance and prints them to screen. Will also optional output to a file
Args:
ome_base_uri: The base portion of the API URI. This is "https://<OME_IP>"
authenticated_headers: A dictionary of HTTP headers generated from an authenticated session with OME
out_file: The name of a file to which you want to output the VLANs
"""
network_url = ome_base_uri + '/api/NetworkConfigurationService/Networks'
network_data = get_data(authenticated_headers, network_url)
if out_file:
# Use UTF 8 in case there are non-ASCII characters like 格蘭特
print("Writing CSV to file...")
with open(out_file, 'w', encoding='utf-8', newline='') as csv_file:
csv_columns = ["Id", "Name", "Description", "VlanMaximum", "VlanMinimum", "Type"]
writer = csv.DictWriter(csv_file, fieldnames=csv_columns, extrasaction='ignore')
writer.writeheader()
for network in network_data:
writer.writerow(network)
for network in network_data:
print("Id: %s, Name: %s, Description: %s, VLAN Min: %s, VLAN Max: %s, Type: %s, Created By: %s"
% (network["Id"],
network["Name"],
network["Description"],
network["VlanMinimum"],
network["VlanMaximum"],
network["Type"],
network["CreatedBy"]))
if __name__ == '__main__':
urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)
parser = argparse.ArgumentParser(description=__doc__,
formatter_class=RawTextHelpFormatter)
parser.add_argument("--ip", "-i", required=True, help="OME Appliance IP")
parser.add_argument("--user", "-u", required=False,
help="Username for OME Appliance", default="admin")
parser.add_argument("--password", "-p", required=False,
help="Password for OME Appliance")
parser.add_argument("--list-networktypes", "-lt", required=False, action='store_true',
help="Prints the different network types to which you can assign a VLAN in OME")
parser.add_argument("--out-file", "-f", required=False,
help="The name of a file to which you want to write your VLANs")
args = parser.parse_args()
base_uri = 'https://%s' % args.ip
if not args.password:
if not sys.stdin.isatty():
# notify user that they have a bad terminal
# perhaps if os.name == 'nt': , prompt them to use winpty?
print("Your terminal is not compatible with Python's getpass module. You will need to provide the"
" --password argument instead. See https://stackoverflow.com/a/58277159/4427375")
sys.exit(0)
else:
password = getpass()
else:
password = args.password
try:
headers = authenticate(args.ip, args.user, password)
if not headers:
sys.exit(0)
if args.list_networktypes:
get_networktypes(base_uri, headers)
else:
get_networks(base_uri, headers, args.out_file)
except Exception as error:
pprint(error)