118 lines
3.8 KiB
Python
118 lines
3.8 KiB
Python
#!/usr/bin/env python3
|
|
# Copyright 2019 The Kubeflow Authors
|
|
#
|
|
# 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.
|
|
"""CLI tool that returns URL of the proxy for particular zone and version."""
|
|
import argparse
|
|
import json
|
|
import logging
|
|
import re
|
|
import requests
|
|
|
|
try:
|
|
unicode
|
|
except NameError:
|
|
unicode = str
|
|
|
|
|
|
def urls_for_zone(zone, location_to_urls_map):
|
|
"""Returns list of potential proxy URLs for a given zone.
|
|
|
|
Returns:
|
|
List of possible URLs, in order of proximity.
|
|
Args:
|
|
zone: GCP zone
|
|
location_to_urls_map: Maps region/country/continent to list of URLs, e.g.:
|
|
{
|
|
"us-west1" : [ us-west1-url ],
|
|
"us-east1" : [ us-east1-url ],
|
|
"us" : [ us-west1-url ],
|
|
...
|
|
}
|
|
"""
|
|
zone_match = re.match("((([a-z]+)-[a-z]+)\d+)-[a-z]", zone)
|
|
if not zone_match:
|
|
raise ValueError("Incorrect zone specified: {}".format(zone))
|
|
|
|
# e.g. zone = us-west1-b
|
|
region = zone_match.group(1) # us-west1
|
|
approx_region = zone_match.group(2) # us-west
|
|
country = zone_match.group(3) # us
|
|
|
|
urls = []
|
|
if region in location_to_urls_map:
|
|
urls.extend([
|
|
url for url in location_to_urls_map[region] if url not in urls
|
|
])
|
|
|
|
region_regex = re.compile("([a-z]+-[a-z]+)\d+")
|
|
for location in location_to_urls_map:
|
|
region_match = region_regex.match(location)
|
|
if region_match and region_match.group(1) == approx_region:
|
|
urls.extend([
|
|
url for url in location_to_urls_map[location] if url not in urls
|
|
])
|
|
|
|
if country in location_to_urls_map:
|
|
urls.extend([
|
|
url for url in location_to_urls_map[country] if url not in urls
|
|
])
|
|
|
|
return urls
|
|
|
|
|
|
def main():
|
|
parser = argparse.ArgumentParser(description="Get proxy URL")
|
|
parser.add_argument("--config-file-path", required=True, type=str)
|
|
parser.add_argument("--location", required=True, type=str)
|
|
parser.add_argument("--version", required=True, type=str)
|
|
|
|
args = parser.parse_args()
|
|
with open(args.config_file_path, "r") as config_file:
|
|
data = json.loads(config_file.read())
|
|
|
|
agent_containers_config = data["agent-docker-containers"]
|
|
version = args.version
|
|
if version not in agent_containers_config:
|
|
version = "latest"
|
|
if version not in agent_containers_config:
|
|
raise ValueError("Version latest not found in the config file.")
|
|
container_config = agent_containers_config[version]
|
|
regional_urls = container_config["proxy-urls"]
|
|
|
|
location = args.location
|
|
urls = urls_for_zone(location, regional_urls)
|
|
if not urls:
|
|
raise ValueError("No valid URLs found for zone: {}".format(location))
|
|
|
|
for url in urls:
|
|
try:
|
|
status_code = requests.head(url).status_code
|
|
except requests.ConnectionError:
|
|
pass
|
|
expected_codes = frozenset([307])
|
|
# 307 - Temporary Redirect, Proxy server sends this if VM has access rights.
|
|
if status_code in expected_codes:
|
|
logging.debug("Status code from the url %s", status_code)
|
|
print(url)
|
|
exit(0)
|
|
logging.debug(
|
|
"Incorrect status_code from the server: %s. Expected: %s",
|
|
status_code, expected_codes
|
|
)
|
|
raise ValueError("No working URL found")
|
|
|
|
|
|
if __name__ == '__main__':
|
|
main()
|