uncloud/ucloud/metadata/main.py

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import os
from flask import Flask, request
from flask_restful import Resource, Api
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from ucloud.config import etcd_client, config, vm_pool
app = Flask(__name__)
api = Api(app)
def get_vm_entry(mac_addr):
return next(filter(lambda vm: mac_addr in list(zip(*vm.network))[1], 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:
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etcd_key = os.path.join(config['etcd']['USER_PREFIX'], data.value['owner_realm'],
data.value['owner'], 'key')
etcd_entry = 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
@staticmethod
def post():
return {'message': 'Previous Implementation is deprecated.'}
# data = etcd_client.get("/v1/metadata/{}".format(request.remote_addr), value_in_json=True)
# print(data)
# if data:
# for k in request.json:
# if k not in data.value:
# data.value[k] = request.json[k]
# if k.endswith("-list"):
# data.value[k] = [request.json[k]]
# else:
# if k.endswith("-list"):
# data.value[k].append(request.json[k])
# else:
# data.value[k] = request.json[k]
# etcd_client.put("/v1/metadata/{}".format(request.remote_addr),
# data.value, value_in_json=True)
# else:
# data = {}
# for k in request.json:
# data[k] = request.json[k]
# if k.endswith("-list"):
# data[k] = [request.json[k]]
# etcd_client.put("/v1/metadata/{}".format(request.remote_addr),
# data, value_in_json=True)
api.add_resource(Root, '/')
def main():
app.run(debug=True, host="::", port="80")
if __name__ == '__main__':
main()