mattshma/bigdata

rbd: unmap failed: (16) Device or resource busy

mattshma opened this issue · 2 comments

mattshma commented

执行 unmap 时报错如下：

$ sudo rbd unmap /dev/rbd1
rbd: sysfs write failed
rbd: unmap failed: (16) Device or resource busy

lsof 结果如下：

$ sudo lsof |grep rbd1
rbd1-task 34397                root  cwd       DIR              253,0        281        512 /
rbd1-task 34397                root  rtd       DIR              253,0        281        512 /
rbd1-task 34397                root  txt   unknown                                          /proc/34397/exe
jbd2/rbd1 34425                root  cwd       DIR              253,0        281        512 /
jbd2/rbd1 34425                root  rtd       DIR              253,0        281        512 /
jbd2/rbd1 34425                root  txt   unknown                                          /proc/34425/exe

kill -9 无效。blkid /dev/rbd1 结果为空。

执行sudo rbd unmap -o force /dev/rbd1，成功 unmap。

mattshma commented

原因可能和 cadvisor 有关，见 pod is deleted but rbd not unmap。

由于启动 cadvisor 时加了参数--volume=/:/rootfs:ro，而在 cadvisor 启动前已经使用的 mount，会无法 unmap。

停掉 cadvisor 再试下。

Alex-ZL commented

和这个issue 相关 google/cadvisor#771

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