从错误状态恢复虚拟机

coverl

　　http://mathslinux.org/?p=464
　　我的 openstack 整个环境被我不小心重启了, 重启计算节点出了问题没有启动起来, 我于是想 stop 这个实例, 但是 stop 后, 虚拟机异常了, 如下:

# nova list 　　+--------------------------------------+--------------+--------+--------------+-------------+-----------------------+ 　　| ID | Name | Status | Task State | Power State | Networks | 　　+--------------------------------------+--------------+--------+--------------+-------------+-----------------------+ 　　| 015ac60a-1902-4d39-b4ea-11376838872b | myvm | ACTIVE | None | Running | private=192.168.22.34 | 　　| 72824bed-4ce6-440c-996f-12d725e3fa71 | myvm-on-ceph | ACTIVE | None | Running | private=192.168.22.36 | 　　| a8bdeb86-981f-449e-a529-e6f43314f7dc | myvm2 | ACTIVE | powering-off | Running | private=192.168.22.35 | 　　+--------------------------------------+--------------+--------+--------------+-------------+-----------------------+ 　　 　　# nova stop myvm2 　　ERROR: Instance a8bdeb86-981f-449e-a529-e6f43314f7dc in task_state powering-off. 　　Cannot stop while the instance is in this state. (HTTP 400) (Request-ID: req-f91e6cfd-bc05-43c8-87e5-5f00bc25f713)

　　我把计算节点修复好了, 该虚拟机也一直无法恢复, 这时候只有通过 nova reset-state 先恢复状态了, 该指令会把 instance 的 Task State 恢复为 None, 然后就可以 stop 或者 delete 该虚拟机了.

# nova reset-state myvm2 　　# nova list 　　+--------------------------------------+--------------+--------+------------+-------------+-----------------------+ 　　| ID | Name | Status | Task State | Power State | Networks | 　　+--------------------------------------+--------------+--------+------------+-------------+-----------------------+ 　　| 015ac60a-1902-4d39-b4ea-11376838872b | myvm | ACTIVE | None | Running | private=192.168.22.34 | 　　| 72824bed-4ce6-440c-996f-12d725e3fa71 | myvm-on-ceph | ACTIVE | None | Running | private=192.168.22.36 | 　　| a8bdeb86-981f-449e-a529-e6f43314f7dc | myvm2 | ERROR | None | Running | private=192.168.22.35 | <== 状态已经更新 　　+--------------------------------------+--------------+--------+------------+-------------+-----------------------+

　　状态已经修复, 可以 stop && start 了

# nova stop myvm2 　　# nova list 　　+--------------------------------------+--------------+---------+------------+-------------+-----------------------+ 　　| ID | Name | Status | Task State | Power State | Networks | 　　+--------------------------------------+--------------+---------+------------+-------------+-----------------------+ 　　| 015ac60a-1902-4d39-b4ea-11376838872b | myvm | ACTIVE | None | Running | private=192.168.22.34 | 　　| 72824bed-4ce6-440c-996f-12d725e3fa71 | myvm-on-ceph | ACTIVE | None | Running | private=192.168.22.36 | 　　| a8bdeb86-981f-449e-a529-e6f43314f7dc | myvm2 | SHUTOFF | None | Shutdown | private=192.168.22.35 | 　　+--------------------------------------+--------------+---------+------------+-------------+-----------------------+ 　　 　　 　　# nova list 　　+--------------------------------------+--------------+--------+------------+-------------+-----------------------+ 　　| ID | Name | Status | Task State | Power State | Networks | 　　+--------------------------------------+--------------+--------+------------+-------------+-----------------------+ 　　| 015ac60a-1902-4d39-b4ea-11376838872b | myvm | ACTIVE | None | Running | private=192.168.22.34 | 　　| 72824bed-4ce6-440c-996f-12d725e3fa71 | myvm-on-ceph | ACTIVE | None | Running | private=192.168.22.36 | 　　| a8bdeb86-981f-449e-a529-e6f43314f7dc | myvm2 | ACTIVE | None | Running | private=192.168.22.35 | 　　+--------------------------------------+--------------+--------+------------+-------------+-----------------------+