PowerFlex：當 SDC 無法在 OpenStack 上連線時，磁碟區取消對應無法運作

Summary: 當使用者刪除 ScaleIO 磁碟區支援的 VM 時，無法存取運算/主機和 SDC 節點，就會失敗。

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Symptoms

無法連線到運算/主機和 SDC 節點時，磁碟區因對應的 SDC 而無法刪除。
  1. 建立磁碟區。
  2. 在卷上創建 VM。
  3. 電腦/主機/SDC 節點無法連線 （中斷連線/關機）。
  4. 移除虛擬機器。VM 正在移除，但磁碟區無法刪除，且仍對應至 SDC。
     
症狀
OpenStack 磁碟區清單：   
  
+--------------------------------------+---------------------------------------------+----------------+------+---------------------------------------------------------------+
| ID                                   | Name                                        | Status         | Size | Attached to                                                   |
+--------------------------------------+---------------------------------------------+----------------+------+---------------------------------------------------------------+
| a53e5203-2816-4259-b19c-a8549e12dee9 | cirros-volume-test-simil-healing-20190205-5 | available      |   32 |                                                               |
| eaf532a9-725f-4ab8-b4aa-d553069bf3c1 | cirros-volume-test-simil-healing            | error_deleting |   32 |                                                               |
| 7de60f71-b813-4f50-83db-a3fb9b5eedee | volume-CentOS-7_z                           | available      |   24 |                                                               |
| 30024869-b46d-45e6-80af-c58340f3306c | volume-CentOS-7_y                           | available      |   24 |                                                               |
| bb3ca8e6-5153-4ff9-b409-882605fcb2fe | volume-CentOS-7_x                           | available      |   24 |                                                               |
| 66967df9-0a3b-430d-9917-c7130acc43c2 | ubuntu01                                    | available      |   24 | Attached to 90a6f515-3541-4d0b-bf00-d14c4968ad80 on /dev/vda  |
+--------------------------------------+---------------------------------------------+----------------+------+---------------------------------------------------------------+
 
閘道 API 作業記錄：   
  
2019-02-07 10:09:48,467 [http-nio-28443-exec-36] INFO  audit - 1XX.1XX.39.XX:/api/instances/Volume::26f397eb0000002a/action/addMappedSdc {guid=328E7308-3243-47B0-B4CF-822A305E0EBF
, allowMultipleMappings=TRUE}
2019-02-07 10:16:19,071 [http-nxx-28443-exec-40] INFO  audit - 1XX.1XX.39.XX:/api/instances/Volume::26f397eb0000002a/action/removeVolume {removeMode=ONLY_ME}
 
事件記錄：    
2566 2019-02-07 10:13:54.247 SDC_DISCONNECTED          WARNING    SDC on IP 10.70.0.1XX disconnected. ID: 88e28c6d0000000c; GUID: 328E7308-3243-47B0-B4CF-822A305E0EBF
72627 2019-02-07 10:16:19.724 MDM_CLI_CONF_COMMAND_RECEIVED INFO       Command remove_volume received, User: 'admin'. [119405768] Volume ID: 26f397eb0000002a (Removing this volume only)
72628 2019-02-07 10:16:19.724 CLI_COMMAND_FAILED        WARNING    Command remove_volume was not successful. Error code: Volume is mapped [119405768]
 

影響
磁碟區不會被刪除，且會在 OpenStack 上停留在錯誤狀態。

Cause

Hypervisor 節點故障 （電源/網路） 會使磁碟區與 SDC 的對應成為不受 OpenStack 管理，而從 OpenStack 刪除磁碟區/VM 時，並不會在刪除前取消對應。

非託管映射的另一種情況是，當 VM 在故障時移動到另一個主機並且主機返回時，刪除卷時，它仍然會由於映射的 SDC 而失敗，因為它映射到新舊 SDC，並且舊的 SDC 計為非託管映射。

Resolution

 
新增”sio_unmap_volume_before_deletion=True」標記至 cinder.conf 上的 PowerFlex 組態，並重新啟動 cinder 服務。
 
如果 PowerFlex 驅動程式設定為定期偵測環境中具有非受管理 PowerFlex 磁碟區對應 （不受 OpenStack 管理的磁碟區對應） 的運算節點，則啟用此選項會很有用。
 
例如：   
  
[scaleio]
sio_unmap_volume_before_deletion=True
san_ip=1XX.1XX.39.XX
san_password=***!
san_thin_provision=True
sio_storage_pool_name=flashPool
sio_storage_pools=totp:flashPool
sio_max_over_subscription_ratio=10
volume_driver=cinder.volume.drivers.emc.scaleio.ScaleIODriver
san_login=admin
volume_backend_name=scaleio-totp-ssd
sio_protection_domain_name=totp

Affected Products

PowerFlex Software

Products

PowerFlex Software, VxFlex Product Family, VxFlex Ready Node, ScaleIO Ready Node-PowerEdge 13G, PowerFlex appliance R640, PowerFlex appliance R740XD, PowerFlex appliance R840
Article Properties
Article Number: 000058331
Article Type: Solution
Last Modified: 03 Nov 2025
Version:  5
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