- 查看cinder-scheduler日志
- cinder-scheduler 执行调度算法，通过 Filter 和 Weigher 挑选最优的存储节点。cinder-scheduler 通过 Flow volume_create_scheduler 执行调度工作。
|
|
|
Jun 11 16:51:14 controller cinder-scheduler[29282]:
DEBUG cinder.scheduler.manager [None req-4111af2f-99a8-4166-8647-569b038786d9 admin None]
(22955515-20d0-4af4-8890-df981d8bbe8d)
transitioned into state from state 'PENDING'
{{(pid=29282) _flow_receiver /usr/local/lib/python2.7/dist-packages/taskflow/listeners/logging.py:145
|
|
- 该 Flow 依次执行 ExtractSchedulerSpecTask 和 ScheduleCreateVolumeTask，它们在源码中就是两个类，在源码/opt/stack/cinder/cinder/scheduler/flows/create_volume.py上。ExtractSchedulerSpecTask作用是Extracts a spec object from a partial and/or incomplete request spec 从部分和/或不完整的请求spec中提取spec对象(spec：说明、规范)
|
|
|
Jun 11 16:51:14 controller cinder-scheduler[29282]:
DEBUG cinder.scheduler.manager [None req-4111af2f-99a8-4166-8647-569b038786d9 admin None]
Task 'cinder.scheduler.flows.create_volume.;volume:create'
(2639d26d-a289-4fa6-8e47-096b35b77015) transitioned into state from state 'PENDING'
{{(pid=29282) _task_receiver /usr/local/lib/python2.7/dist-packages/taskflow/listeners/logging.py:194
|
|
|
Jun 11 16:51:14 controller cinder-scheduler[29282]:
DEBUG cinder.scheduler.manager [None req-4111af2f-99a8-4166-8647-569b038786d9 admin None]
Task 'cinder.scheduler.flows.create_volume.;volume:create'
(2639d26d-a289-4fa6-8e47-096b35b77015) transitioned into state from state 'RUNNING' ...
{{(pid=29282) _task_receiver /usr/local/lib/python2.7/dist-packages/taskflow/listeners/logging.py:183
|
|
- 主要的 filter 和 weighting 工作由 ScheduleCreateVolumeTask Activates a scheduler driver and handles any subsequent failures 完成
- 经过 AvailabilityZoneFilter, CapacityFilter, CapabilitiesFilter 和 CapacityWeigher 的层层筛选，最终选择了存储节点 devstack-controller@lvmdriver-1#lvmdriver-1。
- 过滤器源码位置：\opt\stack\cinder\cinder\scheduler\filters
|
|
|
Jun 11 16:51:14 controller cinder-scheduler[29282]:
DEBUG cinder.scheduler.manager [None req-4111af2f-99a8-4166-8647-569b038786d9 admin None]
Task 'cinder.scheduler.flows.create_volume.;volume:create'
(f7f99d55-3903-4f0d-bf47-b269e1204775) transitioned into state from state 'PENDING'
{{(pid=29282) _task_receiver /usr/local/lib/python2.7/dist-packages/taskflow/listeners/logging.py:194
|
|
|
Jun 11 16:51:15 controller cinder-scheduler[29282]:
DEBUG cinder.scheduler.base_filter [None req-4111af2f-99a8-4166-8647-569b038786d9 admin None]
{{(pid=29282) get_filtered_objects /opt/stack/cinder/cinder/scheduler/base_filter.py:95
|
因为只有一个存储节点
|
|
Jun 11 16:51:15 controller cinder-scheduler[29282]:
DEBUG cinder.scheduler.base_filter [None req-4111af2f-99a8-4166-8647-569b038786d9 admin None]
{{(pid=29282) get_filtered_objects /opt/stack/cinder/cinder/scheduler/base_filter.py:125
|
|
|
Jun 11 16:51:15 controller cinder-scheduler[29282]:
DEBUG cinder.scheduler.base_filter [None req-4111af2f-99a8-4166-8647-569b038786d9 admin None]
{{(pid=29282) get_filtered_objects /opt/stack/cinder/cinder/scheduler/base_filter.py:125
|
|
|
Jun 11 16:51:15 controller cinder-scheduler[29282]:
DEBUG cinder.scheduler.base_filter [None req-4111af2f-99a8-4166-8647-569b038786d9 admin None]
{{(pid=29282) get_filtered_objects /opt/stack/cinder/cinder/scheduler/base_filter.py:125
|
|
|
Jun 11 16:51:15 controller cinder-scheduler[29282]:
DEBUG cinder.scheduler.filter_scheduler [None req-4111af2f-99a8-4166-8647-569b038786d9 admin None]
:free_capacity_gb: 22.8, total_capacity_gb:
{{(pid=29282) /opt/stack/cinder/cinder/scheduler/filter_scheduler.py:339
|
|
|
Jun 11 16:51:15 controller cinder-scheduler[29282]:
DEBUG cinder.scheduler.filter_scheduler [None req-4111af2f-99a8-4166-8647-569b038786d9 admin None]
{{(pid=29282) _choose_top_backend /opt/stack/cinder/cinder/scheduler/filter_scheduler.py:560
|
|
|
Jun 11 16:51:15 controller cinder-scheduler[29282]:
DEBUG cinder.scheduler.manager [None req-a6c9fadb-0364-43da-bbf0-d333c549aa74 admin None]
Task 'cinder.scheduler.flows.create_volume.;volume:create'
(37386aa6-d742-46cb-9ff2-c842dbc7e159) transitioned into state from state 'RUNNING' with result 'None'
{{(pid=29282) _task_receiver /usr/local/lib/python2.7/dist-packages/taskflow/listeners/logging.py:183
|
|
- Flow volume_create_scheduler 完成调度，状态变为 SUCCESS。
|
|
|
Jun 11 16:51:15 controller cinder-scheduler[29282]:
DEBUG cinder.scheduler.manager [None req-a6c9fadb-0364-43da-bbf0-d333c549aa74 admin None]
... transitioned into state from state 'RUNNING'
{{(pid=29282) _flow_receiver /usr/local/lib/python2.7/dist-packages/taskflow/listeners/logging.py:145
|
|
- cinder-scheduler 发送消息
- cinder-scheduler 发送消息给 cinder-volume，让其创建 volume。源码 /opt/stack/cinder/cinder/scheduler/filter_scheduler.py，方法为 schedule_create_volume。
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
|
class FilterScheduler(driver.Scheduler):
"""Scheduler that can be used for filtering and weighing."""
#...
def schedule_create_volume(self, context, request_spec, filter_properties):
backend = self._schedule(context, request_spec, filter_properties)
if not backend:
raise exception.NoValidBackend(reason=_("No weighed backends "
"available"))
backend = backend.obj
volume_id = request_spec['volume_id']
updated_volume = driver.volume_update_db(context, volume_id,
backend.host,
backend.cluster_name)
self._post_select_populate_filter_properties(filter_properties,
backend)
# context is not serializable
filter_properties.pop('context', None)
self.(context, updated_volume, request_spec,
filter_properties,
allow_reschedule=True)
#...
|
|
|
Jun 11 16:51:14 controller cinder-scheduler[29282]:
DEBUG cinder.scheduler.manager [None req-4111af2f-99a8-4166-8647-569b038786d9 admin None]
(22955515-20d0-4af4-8890-df981d8bbe8d)
transitioned into state from state 'PENDING'
{{(pid=29282) _flow_receiver /usr/local/lib/python2.7/dist-packages/taskflow/listeners/logging.py:145
|
|
