A cluster lifecycle orchestrator for Airship.
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# Copyright 2017 AT&T Intellectual Property. All other rights reserved.
#
# 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.
import falcon, falcon.request as request
import uuid
import json
import configparser
import os
class BaseResource(object):
authorized_roles = []
def on_options(self, req, resp):
self_attrs = dir(self)
methods = ['GET', 'HEAD', 'POST', 'PUT', 'DELETE', 'PATCH']
allowed_methods = []
for m in methods:
if 'on_' + m.lower() in self_attrs:
allowed_methods.append(m)
resp.headers['Allow'] = ','.join(allowed_methods)
resp.status = falcon.HTTP_200
# By default, no one is authorized to use a resource
def authorize_roles(self, role_list):
authorized = set(self.authorized_roles)
applied = set(role_list)
if authorized.isdisjoint(applied):
return False
else:
return True
# Error Handling
def return_error(self, resp, status_code, message="", retry=False):
"""
Write a error message body and throw a Falcon exception to trigger an HTTP status
:param resp: Falcon response object to update
:param status_code: Falcon status_code constant
:param message: Optional error message to include in the body
:param retry: Optional flag whether client should retry the operation. Can ignore if we rely solely on 4XX vs 5xx status codes
"""
resp.body = json.dumps({'type': 'error', 'message': message, 'retry': retry})
resp.content_type = 'application/json'
resp.status = status_code
# Get Config Data
def retrieve_config(self, section="", data=""):
# The current assumption is that shipyard.conf will be placed in a fixed path
# within the shipyard container - Path will be /home/shipyard/shipyard.conf
path = '/home/shipyard/shipyard.conf'
# Check that shipyard.conf exists
if os.path.isfile(path):
config = configparser.ConfigParser()
config.read(path)
# Retrieve data from shipyard.conf
query_data = config.get(section, data)
return query_data
else:
return 'Error - Missing Configuration File'
class ShipyardRequestContext(object):
def __init__(self):
self.log_level = 'error'
self.user = None
self.roles = ['anyone']
self.request_id = str(uuid.uuid4())
self.external_marker = None
def set_log_level(self, level):
if level in ['error', 'info', 'debug']:
self.log_level = level
def set_user(self, user):
self.user = user
def add_role(self, role):
self.roles.append(role)
def add_roles(self, roles):
self.roles.extend(roles)
def remove_role(self, role):
self.roles = [x for x in self.roles
if x != role]
def set_external_marker(self, marker):
self.external_marker = str(marker)[:32]
class ShipyardRequest(request.Request):
context_type = ShipyardRequestContext