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import os
import argparse
from flask import Flask, request
from flask_restful import Resource, Api
from werkzeug.exceptions import HTTPException
from uncloud.common.settings import settings
from uncloud.shared import shared
app = Flask(__name__)
api = Api(app)
app.logger.handlers.clear()
arg_parser = argparse.ArgumentParser('metadata', add_help=False)
arg_parser.add_argument('--port', '-p', default=80, help='By default bind to port 80')
@app.errorhandler(Exception)
def handle_exception(e):
app.logger.error(e)
# pass through HTTP errors
if isinstance(e, HTTPException):
return e
# now you're handling non-HTTP exceptions only
return {"message": "Server Error"}, 500
def get_vm_entry(mac_addr):
return next(
filter(
lambda vm: mac_addr in list(zip(*vm.network))[1],
shared.vm_pool.vms,
),
None,
)
# https://stackoverflow.com/questions/37140846/how-to-convert-ipv6-link-local-address-to-mac-address-in-python
def ipv62mac(ipv6):
# remove subnet info if given
subnet_index = ipv6.find("/")
if subnet_index != -1:
ipv6 = ipv6[:subnet_index]
ipv6_parts = ipv6.split(":")
mac_parts = list()
for ipv6_part in ipv6_parts[-4:]:
while len(ipv6_part) < 4:
ipv6_part = "0" + ipv6_part
mac_parts.append(ipv6_part[:2])
mac_parts.append(ipv6_part[-2:])
# modify parts to match MAC value
mac_parts[0] = "%02x" % (int(mac_parts[0], 16) ^ 2)
del mac_parts[4]
del mac_parts[3]
return ":".join(mac_parts)
class Root(Resource):
@staticmethod
def get():
data = get_vm_entry(ipv62mac(request.remote_addr))
if not data:
return (
{"message": "Metadata for such VM does not exists."},
404,
)
else:
etcd_key = os.path.join(
settings["etcd"]["user_prefix"],
data.value["owner_realm"],
data.value["owner"],
"key",
)
etcd_entry = shared.etcd_client.get_prefix(
etcd_key, value_in_json=True
)
user_personal_ssh_keys = [key.value for key in etcd_entry]
data.value["metadata"]["ssh-keys"] += user_personal_ssh_keys
return data.value["metadata"], 200
api.add_resource(Root, "/")
def main(port=None, debug=False):
app.run(debug=debug, host="::", port=port)
if __name__ == "__main__":
main()