[[["容易理解","easyToUnderstand","thumb-up"],["確實解決了我的問題","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["難以理解","hardToUnderstand","thumb-down"],["資訊或程式碼範例有誤","incorrectInformationOrSampleCode","thumb-down"],["缺少我需要的資訊/範例","missingTheInformationSamplesINeed","thumb-down"],["翻譯問題","translationIssue","thumb-down"],["其他","otherDown","thumb-down"]],["上次更新時間：2025-09-03 (世界標準時間)。"],[],[],null,["# StorageClass configuration\n\n| You are currently viewing version 1.14 of the Apigee hybrid documentation. For more information, see [Supported versions](/apigee/docs/hybrid/supported-platforms#supported-versions).\n\n\nThe Cassandra database uses\n[dynamically created](https://kubernetes.io/docs/concepts/storage/persistent-volumes/#dynamic) persistent volumes to store data. For proper database functioning,\nApigee requires you to configure a [StorageClass](https://kubernetes.io/docs/concepts/storage/storage-classes)\ndefinition that is backed by a solid-state drive (SSD).\n\n\nIf you do not currently have SSD configured for Cassandra, this topic explains how to create a\nnew StorageClass that uses SSD and make it the\ndefault class. When Cassandra starts, it will use this default StorageClass.\n| **KEY POINT:** Apigee requires the use of SSD for Cassandra.\n\nThe steps outlined in this topic for StorageClass configuration are only applicable to a *new*\nCassandra installation. If you already have a Cassandra class installed, you must decommission the existing\ncluster in order to configure the StorageClass definition. Changes to the StorageClass definition of an\nexisting Cassandra cluster after installation are not supported.\n\nApigee recommends deploying hybrid in [two or more regions](/apigee/docs/hybrid/v1.14/multi-region),\nin order to decommission and re-install one region\nwhile preserving data in the secondary region. Alternatively, you can use a [non-CSI hybrid backup](/apigee/docs/hybrid/v1.14/cassandra-backup-overview#how-to-take-backups) to restore\ndata in a single-region installation, after decommissioning and configuring the required StorageClass definition.\n\n\u003cbr /\u003e\n\nChange the default StorageClass\n-------------------------------\n\n\nThe following steps explain how to create a StorageClass and make it the default class. For more\ninformation, see [Change the default storage class](https://kubernetes.io/docs/tasks/administer-cluster/change-default-storage-class/) in the Kubernetes documentation.\n\n1. Get the name of the current default StorageClass: \n\n ```\n kubectl get sc\n ```\n\n\n For example: \n\n kubectl get sc\n NAME PROVISIONER RECLAIMPOLICY VOLUMEBINDINGMODE ALLOWVOLUMEEXPANSION AGE\n premium-rwo pd.csi.storage.gke.io Delete WaitForFirstConsumer true 15h\n standard kubernetes.io/gce-pd Delete Immediate true 15h\n standard-rwo (default) pd.csi.storage.gke.io Delete WaitForFirstConsumer true 15h\n \n2. Describe the StorageClass named `standard-rwo`. Note that its type is `pd-balanced`: \n\n ```\n kubectl describe sc standard-rwo\n ```\n\n\n For example: \n\n ```text\n kubectl describe sc standard-rwo\n ``` \n\n ```\n Name: standard-rwo\n IsDefaultClass: Yes\n Annotations: components.gke.io/layer=addon,storageclass.kubernetes.io/is-default-class=false\n Provisioner: pd.csi.storage.gke.io\n Parameters: type=pd-balanced\n AllowVolumeExpansion: True\n MountOptions: \u003cnone\u003e\n ReclaimPolicy: Delete\n VolumeBindingMode: WaitForFirstConsumer\n Events: \u003cnone\u003e\n ```\n3. Create a new file called `storageclass.yaml`.\n4. Add this code to the file. Note that the name of the new class is `apigee-sc`. You can use any name you like. Also, note that the storage type is `pd-ssd`: \n\n ```carbon\n ---\n kind: StorageClass\n apiVersion: storage.k8s.io/v1\n metadata:\n name: \"apigee-sc\"\n provisioner: pd.csi.storage.gke.io\n parameters:\n type: pd-ssd\n replication-type: none\n volumeBindingMode: WaitForFirstConsumer\n allowVolumeExpansion: true\n ```\n5. Apply the new StorageClass to your Kubernetes cluster: \n\n ```\n kubectl apply -f storageclass.yaml\n ```\n6. Execute the following two commands to change the default StorageClass: \n\n ```\n kubectl patch storageclass standard-rwo \\\n -p '{\"metadata\": {\"annotations\":{\"storageclass.kubernetes.io/is-default-class\":\"false\"}}}'\n ``` \n\n ```\n kubectl patch storageclass apigee-sc \\\n -p '{\"metadata\": {\"annotations\":{\"storageclass.kubernetes.io/is-default-class\":\"true\"}}}'\n ```\n7. Execute this command to verify that the new default StorageClass is called `apigee-sc`: \n\n ```\n kubectl get sc\n ```\n\n\n For example: \n\n kubectl get sc\n\n ```\n NAME PROVISIONER RECLAIMPOLICY VOLUMEBINDINGMODE ALLOWVOLUMEEXPANSION AGE\n apigee-sc (default) pd.csi.storage.gke.io Delete WaitForFirstConsumer true 14h\n premium-rwo pd.csi.storage.gke.io Delete WaitForFirstConsumer true 15h\n standard kubernetes.io/gce-pd Delete Immediate true 15h\n standard-rwo pd.csi.storage.gke.io Delete WaitForFirstConsumer true 15h\n \n ```\n8. Describe both the StorageClass to verify the value of **IsDefaultClass** . \n\n ```\n kubectl describe sc apigee-sc\n ``` \n\n ```\n Name: apigee-sc\n IsDefaultClass: Yes\n Annotations: kubectl.kubernetes.io/last-applied-configuration={\"allowVolumeExpansion\":true,\"apiVersion\":\"storage.k8s.io/v1\",\"kind\":\"StorageClass\",\"metadata\":{\"annotations\":{},\"name\":\"apigee-sc\"},\"parameters\":{\"replication-type\":\"none\",\"type\":\"pd-ssd\"},\"provisioner\":\"pd.csi.storage.gke.io\",\"volumeBindingMode\":\"WaitForFirstConsumer\"}\n ,storageclass.kubernetes.io/is-default-class=true\n Provisioner: pd.csi.storage.gke.io\n Parameters: replication-type=none,type=pd-ssd\n AllowVolumeExpansion: True\n MountOptions: \n ReclaimPolicy: Delete\n VolumeBindingMode: WaitForFirstConsumer\n Events: \n \n ``` \n\n ```\n kubectl describe sc standard-rwo\n ``` \n\n ```\n Name: standard-rwo\n IsDefaultClass: No\n Annotations: components.gke.io/layer=addon,storageclass.kubernetes.io/is-default-class=false\n Provisioner: pd.csi.storage.gke.io\n Parameters: type=pd-balanced\n AllowVolumeExpansion: True\n MountOptions: \n ReclaimPolicy: Delete\n VolumeBindingMode: WaitForFirstConsumer\n Events: \n \n ```"]]
