Nutanix CSI Driver で作成された Nutanix Volumes の Volume Group（VG）は、なんらかの事情により削除されずに残ることがあります。なんとか整理するために、VG が関連する Kubernetes の情報を取得してみます。
Nutanix CSI Driver による VG
Nutanix CSI Driver によって作成された VG は、下記のようになっています。
- VG の名前：pvc-＜UUID＞
- Desctiption：Kubernetes リソースの情報が記載される。
Volume Group 画面では、VG の名前が一覧表示されます。しかし、Desctiption は表示されていません。
VG の Update 画面を開くと、Desctiption が表示されます。そこで REST API で、VG の Desctiption を取得してみます。
REST API v2 での VG 情報取得
今回は、Linux（RHEL 8）の curl コマンドで Prism Element に接続して、REST API v2 の下記のメソッドで情報取得してみます。
- GET /volume_groups
Prism Element の認証情報を変数に格納しておきます。
$ PRISM=lab-nxce-02.go-lab.jp $ USER=admin $ PASS='パスワード'
下記のように、curl で API をコールします。取得した JSON データは、jq コマンドで整形しています。
curl -X GET -k -s \ -u "$USER:$PASS" \ -H "Accept: application/json" \ --url "https://$PRISM:9440/PrismGateway/services/rest/v2.0/volume_groups" | \ jq -r .
実行すると、下記のように VG 情報を取得できます。
$ curl -X GET -k -s \ > -u "$USER:$PASS" \ > -H "Accept: application/json" \ > --url "https://$PRISM:9440/PrismGateway/services/rest/v2.0/volume_groups" | \ > jq -r . { "metadata": { "grand_total_entities": 6, "total_entities": 0, "count": 6 }, "entities": [ { "uuid": "00144e7f-07c2-4544-6493-66ac8cbda9b2", "name": "pvc-f115e944-6d2b-41f2-8ce4-2e6e7dd98fc2", "description": "FS:ext4, CSI StorageClass nutanix-volume for nkpm01, PVC:git-operator-git-volume, NS:git-operator-system, POD:git-operator-git-0, SA:default", "logical_timestamp": 6, "disk_list": [ { "index": 0, "vmdisk_uuid": "015bb10d-0cfc-475a-8458-fffb1dcafb28", "container_id": 4, "storage_container_id": 4, "container_uuid": "0a6d6d1a-b52f-4998-903d-fcf9af00885a", "storage_container_uuid": "0a6d6d1a-b52f-4998-903d-fcf9af00885a", "vmdisk_size_mb": 10240, "vmdisk_size_bytes": 10737418240, "vmdisk_path": "/default-container-57560544335892/.stargate/castor/vgdisk/015bb10d-0cfc-475a-8458-fffb1dcafb28", "flash_mode_enabled": false } ], "iscsi_target": "ntnx-k8s-00144e7f-07c2-4544-6493-66ac8cbda9b2", "flash_mode_enabled": false, "load_balance_vm_attachments": true, "is_shared": false }, { "uuid": "f5c83859-0fc4-4d4d-51af-5d9f729c56c6", "name": "pvc-70ba1c1e-6db8-49ed-bf27-57accb1d600a", "description": "FS:ext4, CSI StorageClass nutanix-volume for nkpm01, PVC:git-operator-git-volume, NS:git-operator-system, POD:git-operator-git-0, SA:default", "logical_timestamp": 4, "disk_list": [ { "index": 0, "vmdisk_uuid": "b5b463aa-e8fa-4f97-9f59-e4b1ec89affa", "container_id": 4, "storage_container_id": 4, "container_uuid": "0a6d6d1a-b52f-4998-903d-fcf9af00885a", "storage_container_uuid": "0a6d6d1a-b52f-4998-903d-fcf9af00885a", "vmdisk_size_mb": 10240, "vmdisk_size_bytes": 10737418240, "vmdisk_path": "/default-container-57560544335892/.stargate/castor/vgdisk/b5b463aa-e8fa-4f97-9f59-e4b1ec89affa", "flash_mode_enabled": false } ], "iscsi_target": "ntnx-k8s-f5c83859-0fc4-4d4d-51af-5d9f729c56c6", "attachment_list": [ { "vm_uuid": "ea1b9005-42ed-41b5-95fc-50ca9f078fab" } ], "flash_mode_enabled": false, "load_balance_vm_attachments": true, "is_shared": false }, { "uuid": "afbcd4e9-59a5-4f18-7c94-7a8c416a1b00", "name": "pvc-2ed1fdf9-0b97-4a0d-8164-a9b3af85a055", "description": "FS:ext4, CSI StorageClass nutanix-volume for nkpm01, PVC:git-operator-admin-volume, NS:git-operator-system, POD:git-operator-git-0, SA:default", "logical_timestamp": 7, "disk_list": [ { "index": 0, "vmdisk_uuid": "da17ed3b-0453-4840-86ce-df687d7989af", "container_id": 4, "storage_container_id": 4, "container_uuid": "0a6d6d1a-b52f-4998-903d-fcf9af00885a", "storage_container_uuid": "0a6d6d1a-b52f-4998-903d-fcf9af00885a", "vmdisk_size_mb": 2048, "vmdisk_size_bytes": 2147483648, "vmdisk_path": "/default-container-57560544335892/.stargate/castor/vgdisk/da17ed3b-0453-4840-86ce-df687d7989af", "flash_mode_enabled": false } ], "iscsi_target": "ntnx-k8s-afbcd4e9-59a5-4f18-7c94-7a8c416a1b00", "flash_mode_enabled": false, "load_balance_vm_attachments": true, "is_shared": false }, { "uuid": "f3d7bd21-79d1-440c-b774-7e80c5cac253", "name": "pvc-a170b447-789f-40b9-88c5-2d0981a3c5dc", "description": "nke02, PVC:prometheus-k8s-db-prometheus-k8s-0, NS:ntnx-system, POD:prometheus-k8s-0, SA:prometheus-k8s", "logical_timestamp": 2, "disk_list": [ { "index": 0, "vmdisk_uuid": "eb566cd3-fc03-4e6e-92fd-1800ada8e4ce", "container_id": 4, "storage_container_id": 4, "container_uuid": "0a6d6d1a-b52f-4998-903d-fcf9af00885a", "storage_container_uuid": "0a6d6d1a-b52f-4998-903d-fcf9af00885a", "vmdisk_size_mb": 30720, "vmdisk_size_bytes": 32212254720, "vmdisk_path": "/default-container-57560544335892/.stargate/castor/vgdisk/eb566cd3-fc03-4e6e-92fd-1800ada8e4ce", "flash_mode_enabled": false } ], "iscsi_target": "ntnx-k8s-f3d7bd21-79d1-440c-b774-7e80c5cac253", "attachment_list": [ { "client_uuid": "0efce0c6-a850-4d10-8fa4-e705784d3673", "iscsi_initiator_name": "iqn.2009-09.com.nutanix:dcce2d6b2699" } ], "flash_mode_enabled": false, "enabled_authentications": [ { "auth_type": "chap" } ], "is_shared": true }, { "uuid": "3e6a0843-9418-417c-a4c9-24489723db04", "name": "pvc-f31b37e7-d2e0-49bf-b5fa-512e71f49e1e", "description": "nke01, PVC:prometheus-k8s-db-prometheus-k8s-0, NS:ntnx-system, POD:prometheus-k8s-0, SA:prometheus-k8s", "logical_timestamp": 2, "disk_list": [ { "index": 0, "vmdisk_uuid": "7328f2b1-aa1c-4c31-b42f-8db4e39ef734", "container_id": 4, "storage_container_id": 4, "container_uuid": "0a6d6d1a-b52f-4998-903d-fcf9af00885a", "storage_container_uuid": "0a6d6d1a-b52f-4998-903d-fcf9af00885a", "vmdisk_size_mb": 30720, "vmdisk_size_bytes": 32212254720, "vmdisk_path": "/default-container-57560544335892/.stargate/castor/vgdisk/7328f2b1-aa1c-4c31-b42f-8db4e39ef734", "flash_mode_enabled": false } ], "iscsi_target": "ntnx-k8s-3e6a0843-9418-417c-a4c9-24489723db04", "attachment_list": [ { "client_uuid": "fc4c1dde-c71c-4c66-aa77-09462d904054", "iscsi_initiator_name": "iqn.2009-09.com.nutanix:4a4a351ff937" } ], "flash_mode_enabled": false, "enabled_authentications": [ { "auth_type": "chap" } ], "is_shared": true }, { "uuid": "9af089e6-f671-4a89-4be5-64ae2b58d003", "name": "pvc-e9c8c3b5-a399-46f1-819a-d5b019fae2cb", "description": "FS:ext4, CSI StorageClass nutanix-volume for nkpm01, PVC:git-operator-admin-volume, NS:git-operator-system, POD:git-operator-git-0, SA:default", "logical_timestamp": 4, "disk_list": [ { "index": 0, "vmdisk_uuid": "071e681e-b968-4276-808e-133f205d0381", "container_id": 4, "storage_container_id": 4, "container_uuid": "0a6d6d1a-b52f-4998-903d-fcf9af00885a", "storage_container_uuid": "0a6d6d1a-b52f-4998-903d-fcf9af00885a", "vmdisk_size_mb": 2048, "vmdisk_size_bytes": 2147483648, "vmdisk_path": "/default-container-57560544335892/.stargate/castor/vgdisk/071e681e-b968-4276-808e-133f205d0381", "flash_mode_enabled": false } ], "iscsi_target": "ntnx-k8s-9af089e6-f671-4a89-4be5-64ae2b58d003", "attachment_list": [ { "vm_uuid": "ea1b9005-42ed-41b5-95fc-50ca9f078fab" } ], "flash_mode_enabled": false, "load_balance_vm_attachments": true, "is_shared": false } ] }
情報量が多いので、Description や接続設定などを確認しやすいように、jq のクエリで絞ります。
curl -X GET -k -s \ -u "$USER:$PASS" \ -H "Accept: application/json" \ --url "https://$PRISM:9440/PrismGateway/services/rest/v2.0/volume_groups" | \ jq -r '[.entities[] | {name: .name, description: .description, attachment_list: .attachment_list}]'
これで、下記のように VG 情報を取得できます。
$ curl -X GET -k -s \ > -u "$USER:$PASS" \ > -H "Accept: application/json" \ > --url "https://$PRISM:9440/PrismGateway/services/rest/v2.0/volume_groups" | \ > jq -r '[.entities[] | {name: .name, description: .description, attachment_list: .attachment_list}]' [ { "name": "pvc-f115e944-6d2b-41f2-8ce4-2e6e7dd98fc2", "description": "FS:ext4, CSI StorageClass nutanix-volume for nkpm01, PVC:git-operator-git-volume, NS:git-operator-system, POD:git-operator-git-0, SA:default", "attachment_list": null }, { "name": "pvc-70ba1c1e-6db8-49ed-bf27-57accb1d600a", "description": "FS:ext4, CSI StorageClass nutanix-volume for nkpm01, PVC:git-operator-git-volume, NS:git-operator-system, POD:git-operator-git-0, SA:default", "attachment_list": [ { "vm_uuid": "ea1b9005-42ed-41b5-95fc-50ca9f078fab" } ] }, { "name": "pvc-2ed1fdf9-0b97-4a0d-8164-a9b3af85a055", "description": "FS:ext4, CSI StorageClass nutanix-volume for nkpm01, PVC:git-operator-admin-volume, NS:git-operator-system, POD:git-operator-git-0, SA:default", "attachment_list": null }, { "name": "pvc-a170b447-789f-40b9-88c5-2d0981a3c5dc", "description": "nke02, PVC:prometheus-k8s-db-prometheus-k8s-0, NS:ntnx-system, POD:prometheus-k8s-0, SA:prometheus-k8s", "attachment_list": [ { "client_uuid": "0efce0c6-a850-4d10-8fa4-e705784d3673", "iscsi_initiator_name": "iqn.2009-09.com.nutanix:dcce2d6b2699" } ] }, { "name": "pvc-f31b37e7-d2e0-49bf-b5fa-512e71f49e1e", "description": "nke01, PVC:prometheus-k8s-db-prometheus-k8s-0, NS:ntnx-system, POD:prometheus-k8s-0, SA:prometheus-k8s", "attachment_list": [ { "client_uuid": "fc4c1dde-c71c-4c66-aa77-09462d904054", "iscsi_initiator_name": "iqn.2009-09.com.nutanix:4a4a351ff937" } ] }, { "name": "pvc-e9c8c3b5-a399-46f1-819a-d5b019fae2cb", "description": "FS:ext4, CSI StorageClass nutanix-volume for nkpm01, PVC:git-operator-admin-volume, NS:git-operator-system, POD:git-operator-git-0, SA:default", "attachment_list": [ { "vm_uuid": "ea1b9005-42ed-41b5-95fc-50ca9f078fab" } ] } ]
さらに整理しやすいように、VG の名前と Desctiption だけを CSV で出力してみます。
curl -X GET -k -s \ -u "$USER:$PASS" \ -H "Accept: application/json" \ --url "https://$PRISM:9440/PrismGateway/services/rest/v2.0/volume_groups" | \ jq -r '.entities[] | [.name, .description] | @csv'
CSV で出力できました。フィールドの中にもカンマがたくさんありますが・・・
$ curl -X GET -k -s \ > -u "$USER:$PASS" \ > -H "Accept: application/json" \ > --url "https://$PRISM:9440/PrismGateway/services/rest/v2.0/volume_groups" | \ > jq -r '.entities[] | [.name, .description] | @csv' "pvc-f115e944-6d2b-41f2-8ce4-2e6e7dd98fc2","FS:ext4, CSI StorageClass nutanix-volume for nkpm01, PVC:git-operator-git-volume, NS:git-operator-system, POD:git-operator-git-0, SA:default" "pvc-70ba1c1e-6db8-49ed-bf27-57accb1d600a","FS:ext4, CSI StorageClass nutanix-volume for nkpm01, PVC:git-operator-git-volume, NS:git-operator-system, POD:git-operator-git-0, SA:default" "pvc-2ed1fdf9-0b97-4a0d-8164-a9b3af85a055","FS:ext4, CSI StorageClass nutanix-volume for nkpm01, PVC:git-operator-admin-volume, NS:git-operator-system, POD:git-operator-git-0, SA:default" "pvc-a170b447-789f-40b9-88c5-2d0981a3c5dc","nke02, PVC:prometheus-k8s-db-prometheus-k8s-0, NS:ntnx-system, POD:prometheus-k8s-0, SA:prometheus-k8s" "pvc-f31b37e7-d2e0-49bf-b5fa-512e71f49e1e","nke01, PVC:prometheus-k8s-db-prometheus-k8s-0, NS:ntnx-system, POD:prometheus-k8s-0, SA:prometheus-k8s" "pvc-e9c8c3b5-a399-46f1-819a-d5b019fae2cb","FS:ext4, CSI StorageClass nutanix-volume for nkpm01, PVC:git-operator-admin-volume, NS:git-operator-system, POD:git-operator-git-0, SA:default"
これをもとに、VG の要否を確認していこうと思います。
以上。
