compass-core/compass/db/api/cluster.py
graceyu08 1ef039fca3 add api and db to compass-core
Change-Id: Ic5219943f52848b4e8554023bce21fa1588b27a6
2014-06-02 14:22:11 -07:00

149 lines
4.6 KiB
Python

# Copyright 2014 Huawei Technologies Co. Ltd
#
# 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.
"""Cluster database operations."""
import simplejson as json
from compass.db import api
from compass.db.api import database
from compass.db.api.utils import merge_dict
from compass.db.api.utils import wrap_to_dict
from compass.db.exception import InvalidParameter
from compass.db.exception import RecordNotExists
from compass.db.config_validation import default_validator
# from compass.db.config_validation import extension
from compass.db.models import Cluster
SUPPORTED_FILTERS = ['name', 'adapter', 'owner']
ERROR_MSG = {
'findNoCluster': 'Cannot find the Cluster, ID is %d',
}
@wrap_to_dict()
def get_cluster(cluster_id):
with database.session() as session:
cluster = _get_cluster(session, cluster_id)
info = cluster.to_dict()
return info
@wrap_to_dict()
def list_clusters(filters=None):
"""List all users, optionally filtered by some fields."""
filters = filters or {}
with database.session() as session:
clusters = _list_clusters(session, filters)
clusters_info = [cluster.to_dict() for cluster in clusters]
return clusters_info
@wrap_to_dict()
def get_cluster_config(cluster_id):
"""Get configuration info for a specified cluster."""
with database.session() as session:
config = _get_cluster_config(session, cluster_id)
return config
def _get_cluster_config(session, cluster_id):
with session.begin(subtransactions=True):
cluster = _get_cluster(cluster_id)
config = cluster.config
return config
def _get_cluster(session, cluster_id):
"""Get the adapter by ID."""
with session.begin(subtransactions=True):
cluster = session.query(Cluster).filter_by(id=cluster_id).first()
if not cluster:
err_msg = ERROR_MSG['findNoCluster'] % cluster_id
raise RecordNotExists(err_msg)
return cluster
def _list_clusters(session, filters=None):
"""Get all clusters, optionally filtered by some fields."""
filters = filters or {}
with session.begin(subtransactions=True):
query = api.model_query(session, Cluster)
clusters = api.model_filter(query, Cluster,
filters, SUPPORTED_FILTERS).all()
return clusters
def update_cluster_config(cluster_id, root_elem, config, patch=True):
result = None
if root_elem not in ["os_config", "package_config"]:
raise InvalidParameter("Invalid parameter %s" % root_elem)
with database.session() as session:
cluster = _get_cluster(session, cluster_id)
id_name = None
id_value = None
if root_elem == "os_config":
id_name = "os_id"
id_value = getattr(cluster, "os_id")
else:
id_name = "adapter_id"
id_value = getattr(cluster, "adapter_id")
# Validate config format and values
is_valid, message = default_validator.validate_config(session,
config, id_name,
id_value, patch)
if not is_valid:
raise InvalidParameter(message)
# For addtional validation, you can define functions in extension,
# for example:
# os_name = get_os(cluster.os_id)['name']
# if getattr(extension, os_name):
# func = getattr(getattr(extension, os_name), 'validate_config')
# if not func(session, os_id, config, patch):
# return False
if root_elem == 'os_config':
os_config = cluster.os_global_config
os_config = json.loads(json.dumps(os_config))
merge_dict(os_config, config)
cluster.os_global_config = os_config
result = cluster.os_global_config
else:
package_config = cluster.package_global_config
package_config = json.loads(json.dumps(os_config))
merge_dict(package_config, config)
cluster.package_global_config = package_config
result = cluster.package_global_config
return result