Storage FAQ - Container Service for Kubernetes - Alibaba Cloud Documentation Center

This topic lists the frequently asked questions (FAQ) about mounting and using volumes with Container Storage Interface (CSI) components.

Typical issues

If a pod has an abnormal status or a volume fails to mount, see Troubleshoot storage issues.

The following list describes some typical issues:

Disk volumes

Category	Issue
Creation	Why does the system prompt "InvalidDataDiskCatagory.NotSupported" when I create a dynamically provisioned PV? Why does the system prompt "The specified AZone inventory is insufficient" when I create a dynamically provisioned PV? Why does the system prompt "disk size is not supported" when I create a dynamically provisioned PV? Why does the system prompt "waiting for first consumer to be created before binding" when I create a dynamically provisioned PV? Why does the system prompt "no topology key found on CSINode node-XXXX" when I create a dynamically provisioned PV? Why does the system prompt "selfLink was empty, can't make reference" when I create a dynamically provisioned PV?
Mounting	Why does the system prompt "had volume node affinity conflict" when I start a pod that has a disk mounted? Why does the system prompt "can't find disk" when I start a pod that has a disk mounted? Why does the system prompt "Previous attach action is still in process" when I start a pod that has a disk mounted? Why does the system prompt "InvalidInstanceType.NotSupportDiskCategory" when I start a pod that has a disk mounted? Why does the system prompt "diskplugin.csi.alibabacloud.com not found" in the list of registered CSI drivers when I start a pod that has a disk mounted? Why does the system prompt "Multi-Attach error for volume" when I start a pod that has a disk mounted? Why does the system prompt "Unable to attach or mount volumes: unmounted volumes=[xxx], unattached volumes=[xxx]: timed out waiting for the condition" when I start a pod that uses a disk volume? Why does the system prompt "validate error Device /dev/nvme1n1 has error format more than one digit locations" when I start a pod that has disk mounted? Why does the system prompt "ecs task is conflicted" when I start a pod that has a disk mounted? Why does the system prompt "wrong fs type, bad option, bad superblock on /dev/xxxxx missing codepage or helper program, or other error" when I start a pod that has a disk mounted? Why does the system prompt "exceed max volume count" when I start a pod that has a disk mounted? Why does the system prompt "The amount of the disk on instance in question reach its limits" when I start a pod that has a disk mounted? How do I modify the default StorageClass configuration for cloud disks? Can I use the same disk volume for multiple container applications?
Usage	Why does the system prompt "input/output error" when an application performs read and write operations on the mount directory of a disk volume?
Expansion	Why does the system fail to expand a disk and prompts "Waiting for user to (re-)start a pod to finish file system resize of volume on node"? Why does the system fail to expand a disk and prompt "only dynamically provisioned pvc can be resized and the storageclass that provisions the pvc must support resize"?
Unmounting	Why does the system prompt "The specified disk is not a portable disk" when I delete a pod that has a disk mounted? Why does the system prompt that the disk cannot be unmounted when I delete a pod that has a disk mounted and an orphaned pod that is not managed by ACK is found in the kubelet log? What do I do if the system fails to recreate a deleted pod and prompts that the mounting failed? Why does the system prompt "target is busy" when I delete a pod that has a disk mounted? Why is the disk retained after I delete the PVC used to mount the disk? Why does a PVC still exist after I delete it?

NAS volumes

Type	Issue
Mounting	When you mount a NAS volume, the "chown: Operation not permitted" error is reported When you mount a dynamically provisioned NAS volume, the controller's task queue is full and no new PVs can be created The time required to mount a NAS volume increases When you mount a NAS volume, the "unknown filesystem type "xxx"" error is reported A pod that uses two PVCs to mount a NAS volume remains in the ContainerCreating state How do I use CSI to mount a NAS file system over Transport Layer Security (TLS)? How do I implement user or group fencing for NAS? Can multiple containerized applications use the same NAS volume?
Usage	Cannot create or modify folders when using a NAS volume The "NFS Stale File Handle" error is reported when you read from or write to a file
Uninstallation	A timeout occurs when you uninstall a NAS volume, and the pod remains in the Terminating state

OSS volumes

ossfs 1.0

Type	Issue
Mounting	The time required to mount an OSS volume increases Permission issues when mounting an OSS volume Failed to mount an OSS volume How do I mount only a specific file from OSS using an OSS volume? How do I use a specified ARN or ServiceAccount with RAM Roles for Service Accounts (RRSA) authentication? How do I enable exclusive mount mode after ossfs is containerized? An exception occurs when you mount an OSS volume using subpath or subpathExpr
Usage	Slow access to a bucket through an OSS volume File size is displayed as 0 in the OSS console An application reports the "Transport endpoint is not connected" error when accessing a mount target An application reports the "Input/output error" error when accessing a mount target A folder is displayed as a file object after it is mounted A large amount of abnormal request traffic is detected on the OSS server The Content-Type metadata of file objects written through an OSS volume is always application/octet-stream The "Operation not supported" or "Operation not permitted" error is returned when you create a hard link How do I view the records of access to OSS through an OSS volume? How do I restart the ossfs process in shared mount mode?
Scale-out	Do I need to scale out an OSS volume if the actual storage usage exceeds the configured capacity?
Uninstallation	Failed to uninstall a static OSS volume, and the pod remains in the Terminating state

ossfs 2.0

Type	Issue
Mounting	Failed to mount an OSS volume How do I mount only a specific file from OSS using an OSS volume?
Scale-out	Do I need to scale out an OSS volume if the actual storage usage exceeds the configured capacity?
Usage	How do I restart the ossfs 2.0 process?

Storage components

Type	Issue
Component exceptions	The CSI component fails to start and the component log reports a "403 - Forbidden" error The CSI component fails to start because the image fails to be pulled. The "exec /usr/bin/plugin.csi.alibabacloud.com: exec format error" error is reported. Out-of-memory (OOM) issues caused by storage components A large amount of traffic is detected on the csi-plugin pod The csi-provisioner component log reports the "failed to renew lease xxx timed out waiting for the condition" error
Component upgrade failures	The precheck for the csi-plugin component fails The precheck for the csi-plugin component passes, but the upgrade fails The csi-plugin component is available in the console, but the csi-provisioner component is not The precheck for the csi-provisioner component fails The precheck for the csi-provisioner component passes, but the upgrade fails The csi-provisioner component fails to upgrade because the number of cluster nodes does not meet the requirements The csi-provisioner component fails to upgrade because of a change in StorageClass properties