08.存储Cinder→5.场景学习→02.Create Volume→2.cinder-scheduler调度工作-优快云博客

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查看cinder-scheduler日志
1. 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