调试步骤
修改代码添加断点
scheduler_path='/usr/lib/python2.7/site-packages/cinder/cmd/scheduler.py' tail -n 20 ${scheduler_path} # 删除掉 原有断点 sed -i 's/import pdb;pdb.set_trace();\n//g' ${scheduler_path} # 打上 新断点 sed -i 's/def main():/def main():\n import pdb;pdb.set_trace();/g' ${scheduler_path} tail -n 20 ${scheduler_path}
停止 服务 并 手动 启动
systemctl stop openstack-cinder-scheduler # 观察 启动 命令 systemctl status openstack-cinder-scheduler --> ExecStart=/usr/bin/cinder-scheduler --config-file /usr/share/cinder/cinder-dist.conf --config-file /etc/cinder/cinder.conf --logfile /var/log/cinder/scheduler.log # 指定 cinder 用户 启动 su -s /bin/bash -c '/usr/bin/cinder-scheduler --config-file /usr/share/cinder/cinder-dist.conf --config-file /etc/cinder/cinder.conf --logfile /var/log/cinder/scheduler.log' cinder -> 成功进去 pdb > /usr/lib/python2.7/site-packages/cinder/cmd/scheduler.py(47)main() -> objects.register_all() (Pdb) l : 查看 附近代码 s ：单步进行，并 且进入函数 n ：单步进行 不进入 函数 ![python 代码 片段] 执行代码
调试完成后 不要 忘记 启动 服务 哦
scheduler_path='/usr/lib/python2.7/site-packages/cinder/cmd/scheduler.py' sed -i 's/import pdb;pdb.set_trace();\n//g' ${scheduler_path} tail -n 20 ${scheduler_path} systemctl start openstack-cinder-scheduler
断点 打印
147 148 B-> self.manager = manager_class(host=self.host, 149 service_name=service_name, 150 *args, **kwargs) 151 self.report_interval = report_interval 152 self.periodic_interval = periodic_interval 153 self.periodic_fuzzy_delay = periodic_fuzzy_delay (Pdb) p manager_class <class 'cinder.scheduler.manager.SchedulerManager'>
调试 scheduler 记录
(Pdb) n > /usr/lib/python2.7/site-packages/cinder/scheduler/manager.py(66)__init__() def __init__(self, scheduler_driver=None, service_name=None, *args, **kwargs): -> scheduler_driver = CONF.scheduler_driver 65 if not scheduler_driver: 66 scheduler_driver = CONF.scheduler_driver (Pdb) p CONF.scheduler_driver 'cinder.scheduler.filter_scheduler.FilterScheduler' (Pdb) p kwargs {'host': 'node01'}
调试 调度器
su -s /bin/bash -c '/usr/bin/python2 /usr/bin/cinder-scheduler --config-file /usr/share/cinder/cinder-dist.conf --config-file /etc/cinder/cinder.conf --logfile /var/log/cinder/scheduler.log ' cinder
