1183431ce8
create_k8s_api() requires a bay uuid when create k8s_api Closes-Bug: #1530503 Change-Id: I7ce51fb953b324edfab401eda9e2658ab3e1a418
151 lines
4.8 KiB
Python
151 lines
4.8 KiB
Python
# 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 ast
|
|
|
|
from magnum.common import utils
|
|
from magnum.conductor import k8s_api as k8s
|
|
from magnum.conductor.monitors import MonitorBase
|
|
|
|
|
|
class K8sMonitor(MonitorBase):
|
|
|
|
def __init__(self, context, bay):
|
|
super(K8sMonitor, self).__init__(context, bay)
|
|
self.data = {}
|
|
self.data['nodes'] = []
|
|
self.data['pods'] = []
|
|
|
|
@property
|
|
def metrics_spec(self):
|
|
return {
|
|
'memory_util': {
|
|
'unit': '%',
|
|
'func': 'compute_memory_util',
|
|
},
|
|
}
|
|
|
|
def pull_data(self):
|
|
k8s_api = k8s.create_k8s_api(self.context, self.bay.uuid)
|
|
nodes = k8s_api.list_namespaced_node()
|
|
self.data['nodes'] = self._parse_node_info(nodes)
|
|
pods = k8s_api.list_namespaced_pod('default')
|
|
self.data['pods'] = self._parse_pod_info(pods)
|
|
|
|
def compute_memory_util(self):
|
|
mem_total = 0
|
|
for node in self.data['nodes']:
|
|
mem_total += node['Memory']
|
|
mem_reserved = 0
|
|
|
|
for pod in self.data['pods']:
|
|
mem_reserved += pod['Memory']
|
|
|
|
if mem_total == 0:
|
|
return 0
|
|
else:
|
|
return mem_reserved * 100 / mem_total
|
|
|
|
def _parse_pod_info(self, pods):
|
|
"""Parse pods and retrieve memory details about each pod
|
|
|
|
:param pods: The output of k8s_api.list_namespaced_pods()
|
|
For example:
|
|
{
|
|
'items': [{
|
|
'status': {
|
|
'container_statuses': None,
|
|
'pod_ip': None,
|
|
'phase': 'Pending',
|
|
'message': None,
|
|
'conditions': None,
|
|
},
|
|
'spec': {
|
|
'containers': [{
|
|
'image': 'nginx',
|
|
'resources': {'requests': None,
|
|
'limits': "{u'memory': u'1280e3'}"},
|
|
}],
|
|
},
|
|
'api_version': None,
|
|
}],
|
|
'kind': 'PodList',
|
|
}
|
|
|
|
The above output is the dict form of:
|
|
magnum.common.pythonk8sclient.swagger_client.models.v1_pod_list.
|
|
V1PodList object
|
|
|
|
:return: Memory size of each pod. Example:
|
|
[{'Memory': 1280000.0},
|
|
{'Memory': 1280000.0}]
|
|
"""
|
|
pods = pods.items
|
|
parsed_containers = []
|
|
for pod in pods:
|
|
containers = pod.spec.containers
|
|
for container in containers:
|
|
memory = 0
|
|
resources = container.resources
|
|
limits = resources.limits
|
|
if limits is not None:
|
|
# Output of resources.limits is string
|
|
# for example:
|
|
# limits = "{'memory': '1000Ki'}"
|
|
limits = ast.literal_eval(limits)
|
|
if limits.get('memory', ''):
|
|
memory = utils.get_memory_bytes(limits['memory'])
|
|
container_dict = {
|
|
'Memory': memory
|
|
}
|
|
parsed_containers.append(container_dict)
|
|
return parsed_containers
|
|
|
|
def _parse_node_info(self, nodes):
|
|
"""Parse nodes to retrieve memory of each node
|
|
|
|
:param nodes: The output of k8s_api.list_namespaced_node()
|
|
For example:
|
|
{
|
|
'items': [{
|
|
'status': {
|
|
'phase': None,
|
|
'capacity': "{u'memory': u'2049852Ki'}",
|
|
},
|
|
},
|
|
'api_version': None,
|
|
}],
|
|
'kind': 'NodeList',
|
|
'api_version': 'v1',
|
|
}
|
|
|
|
The above output is the dict form of:
|
|
magnum.common.pythonk8sclient.swagger_client.models.v1_node_list.
|
|
V1NodeList object
|
|
|
|
:return: Memory size of each node. Excample:
|
|
[{'Memory': 1024.0},
|
|
{'Memory': 1024.0}]
|
|
|
|
"""
|
|
nodes = nodes.items
|
|
parsed_nodes = []
|
|
for node in nodes:
|
|
# Output of node.status.capacity is strong
|
|
# for example:
|
|
# capacity = "{'memory': '1000Ki'}"
|
|
capacity = ast.literal_eval(node.status.capacity)
|
|
memory = utils.get_memory_bytes(capacity['memory'])
|
|
parsed_nodes.append({'Memory': memory})
|
|
|
|
return parsed_nodes
|