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OpenStack：CinderボリュームをOpenStackの外部に移行することはできますか。

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環境

  • OpenStack
  • ONTAP

回答

[1]ONTAPで「vol move」コマンドを使用すると、Cinderストレージプール（FlexVol）をアグリゲート間で無停止で移行できます。

いくつかの注意事項：

  • 選択的LUNマッピングに注意してください。SLMを使用している場合に、HAペアから別のHAペアにvol moveを実行すると、SLMのレポートノードにボリュームを移動できます。  これは混乱を招く可能性があります。
  • LUNの移動 は  サポートされていません。  これにより、 Cinder（特に hostprovider_location メタデータとメタデータ）に不整合が生じます。

 

「vol move」の例：

  1. ONTAPには次の2つのデータアグリゲートがあります。

ontap913::> aggr show


Aggregate    Size Available Used% State   #Vols  Nodes       RAID Status
--------- -------- --------- ----- ------- ------ ---------------- ------------
aggr1_ontap913
      94.92GB   94.75GB   0% online     2 ontap913-01    raid_dp,
                                  normal
aggr2_ontap913
      79.10GB   79.10GB   0% online     0 ontap913-01    raid_dp,
                                  normal
 

  1. OpenStackでは、実行中のインスタンスによって3つの「使用中」Cinderボリュームが使用されています。

[root@openstack-xena-standalone ~(tenant01_user)]# openstack volume list
+--------------------------------------+---------------------+-----------+------+--------------------------------------------+
| ID                   | Name         | Status   | Size | Attached to                 |
+--------------------------------------+---------------------+-----------+------+--------------------------------------------+
| 09da3411-b16f-4998-9a87-dbe807bba515 | vol_move_test03    | in-use   |   1 | Attached to vol_move_vm03 on /dev/vda    |
| 2df3389e-e6b6-4b14-aaff-35079d84fab0 | vol_move_test02    | in-use   |   1 | Attached to vol_move_vm02 on /dev/vda    |
| 70c8aec7-567c-4d30-8ceb-c875c744d661 | vol_move_test01    | in-use   |   1 | Attached to vol_move_vm01 on /dev/vda    |
+--------------------------------------+---------------------+-----------+------+--------------------------------------------+

[root@openstack-xena-standalone ~(tenant01_user)]# openstack server list
+--------------------------------------+-------------------+---------+-----------------------------------------+--------------------------+---------+
| ID                   | Name        | Status  | Networks                 | Image           | Flavor  |
+--------------------------------------+-------------------+---------+-----------------------------------------+--------------------------+---------+
| 55db85a2-8966-4ae6-a226-b56a32d66259 | vol_move_vm03    | ACTIVE  | private_network_tenant01=192.168.98.215 | N/A (booted from volume) | m1.tiny |
| 36ee8e47-51d4-40c1-aa60-ecde82d99951 | vol_move_vm02    | ACTIVE  | private_network_tenant01=192.168.98.201 | N/A (booted from volume) | m1.tiny |
| 53597579-9811-494f-9fff-57c59449333b | vol_move_vm01    | ACTIVE  | private_network_tenant01=192.168.98.194 | N/A (booted from volume) | m1.tiny |
+--------------------------------------+-------------------+---------+-----------------------------------------+--------------------------+---------+

  1. 3つのCinderボリュームはすべて、 aggr1_ontap913 FlexVol「vol_move_test」に配置されます。          

[root@openstack-xena-standalone ~(tenant01_user)]# cinder get-pools --detail
+-----------------------------------+-----------------------------------------------------------------------------+
| Property              | Value                                     |
+-----------------------------------+-----------------------------------------------------------------------------+
| QoS_support             | True                                     |
| allocated_capacity_gb        | 3                                       |
| cacheable              | True                                     |
| consistencygroup_support      | True                                     |
| consistent_group_snapshot_enabled | True                                     |
| driver_version           | 3.0.0                                     |
| filter_function           | capabilities.utilization < 70                         |
| free_capacity_gb          | 15.98                                     |
| goodness_function          | 100 - capabilities.utilization                        |
| max_over_subscription_ratio     | 20.0                                     |
| multiattach             | True                                     |
| name                | openstack-xena-standalone.xyz.local@ontap-iscsi-913#vol_move_test      |
| netapp_aggregate          | aggr1_ontap913                                |
| netapp_aggregate_used_percent    | 0                                       |
| netapp_compression         | false                                     |
| netapp_dedup            | false                                     |
| netapp_dedupe_used_percent     | 0.0                                      |
| netapp_disk_type          | ['FCAL']                                   |
| netapp_flexvol_encryption      | false                                     |
| netapp_hybrid_aggregate       | false                                     |
| netapp_is_flexgroup         | false                                     |
| netapp_mirrored           | false                                     |
| netapp_qos_min_support       | false                                     |
| netapp_raid_type          | raid_dp                                    |
| netapp_thin_provisioned       | true                                     |
| online_extend_support        | True                                     |
| pool_name              | vol_move_test                                 |
| replication_enabled         | False                                     |
| reserved_percentage         | 0                                       |
| storage_protocol          | iSCSI                                     |
| thick_provisioning_support     | False                                     |
| thin_provisioning_support      | True                                     |
| timestamp              | 2023-07-26T12:59:57.009707                          |
| total_capacity_gb          | 19.0                                     |
| utilization             | 8.22                                     |
| vendor_name             | NetApp                                    |
| volume_backend_name         | ontap-iscsi-913                                |
+-----------------------------------+-----------------------------------------------------------------------------+

  1. aを vol move 「aggr1_ontap913」から「aggr2_ontap913」に実行します。

ontap913::> vol move start -vserver ontap913_data -volume vol_move_test -destination-aggregate aggr2_ontap913
[Job 45] Job is queued: Move "vol_move_test" in Vserver "ontap913_data" to aggregate "aggr2_ontap913". Use the "volume move show -vserver ontap913_data -volume vol_move_test" command to view the status of this operation.

ontap913::> vol move show
Vserver   Volume    State   Move Phase Percent-Complete Time-To-Complete
--------- ---------- -------- ---------- ---------------- ----------------
ontap913_data
      vol_move_test
           healthy  replicating
                     86%        Wed Jul 26 13:10:36 2023
ontap913::> vol move show
Vserver   Volume    State   Move Phase Percent-Complete Time-To-Complete
--------- ---------- -------- ---------- ---------------- ----------------
ontap913_data
      vol_move_test
           healthy  cutover   98%        Wed Jul 26 13:10:34 2023
 

ontap913::> vol show -fields aggregate -volume vol_move_test
vserver      volume     aggregate
---------------- ------------- -----------------
ontap913_data vol_move_test aggr2_jdwontap913

  1. cinder get-pools --detail 以前のアグリゲートは引き続き表示されます。  Cinderサービスを再起動します。  サービスの再起動後、Cinderによって netapp_aggregate フィールドが更新されます。

+-----------------------------------+-----------------------------------------------------------------------------+
| Property              | Value                                     |
+-----------------------------------+-----------------------------------------------------------------------------+
| QoS_support             | True                                     |
| allocated_capacity_gb        | 3                                       |
| cacheable              | True                                     |
| consistencygroup_support      | True                                     |
| consistent_group_snapshot_enabled | True                                     |
| driver_version           | 3.0.0                                     |
| filter_function           | capabilities.utilization < 70                         |
| free_capacity_gb          | 15.98                                     |
| goodness_function          | 100 - capabilities.utilization                        |
| max_over_subscription_ratio     | 20.0                                     |
| multiattach             | True                                     |
| name                | openstack-xena-standalone.xyz.local@ontap-iscsi-913#vol_move_test       |
| netapp_aggregate          | aggr2_ontap913                                |
| netapp_aggregate_used_percent    | 0                                       |
| netapp_compression         | false                                     |
| netapp_dedup            | false                                     |
| netapp_dedupe_used_percent     | 0.0                                      |
| netapp_disk_type          | ['FCAL']                                   |
| netapp_flexvol_encryption      | false                                     |
| netapp_hybrid_aggregate       | false                                     |
| netapp_is_flexgroup         | false                                     |
| netapp_mirrored           | false                                     |
| netapp_qos_min_support       | false                                     |
| netapp_raid_type          | raid_dp                                    |
| netapp_thin_provisioned       | true                                     |
| online_extend_support        | True                                     |
| pool_name              | vol_move_test                                 |
| replication_enabled         | False                                     |
| reserved_percentage         | 0                                       |
| storage_protocol          | iSCSI                                     |
| thick_provisioning_support     | False                                     |
| thin_provisioning_support      | True                                     |
| timestamp              | 2023-07-26T13:35:17.988838                          |
| total_capacity_gb          | 19.0                                     |
| utilization             | 6.38                                     |
| vendor_name             | NetApp                                    |
| volume_backend_name         | ontap-iscsi-913                                |
+-----------------------------------+-----------------------------------------------------------------------------+
 

追加情報

 

 

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