List supported file systems for csi.storage.k8s.io/fstype

[LukeMauldin]

Describe the bug

The documentation states that csi.storage.k8s.io/fstype defaults to the file system type ext4. What are the other supported file system values? Specifically, is btrfs a supported value?

Environment details

• Image/version of Ceph CSI driver : v3.6.0
• Helm chart version :
• Kernel version : 5.3.18

[Madhu-1]

for now ext4 and xfs, buts ext4 is recommended as there is an issue with xfs rook/rook#3132 (comment)

[LukeMauldin]

Will other file systems such as btrfs work or will ceph-csi fail trying to provision them?

[Madhu-1]

Will other file systems such as btrfs work or will ceph-csi fail trying to provision them?

We have tested ext4 and xfs, if rbd/kubernetes supports other filesystem types it should be supported with cephcsi also. Please try it out and let us know how it works.

[LukeMauldin]

I verified the static provisioned volume with ext4 and that worked. When I tried with btrfs file system I received the error below.
It seems that only xfs, ext3, and ext4 are supported by this plugin. Do I need to put in a feature request to support btrfs as well?

`Warning FailedMount 1s (x5 over 10s) kubelet MountVolume.MountDevice failed for volume "ceph-rbd-static-pv" : rpc error: code = Internal desc = rpc error: code = Internal desc = need resize check failed on devicePath /dev/rbd1 and staingPath /var/lib/kubelet/plugins/kubernetes.io/csi/pv/ceph-rbd-static-pv/globalmount/csi-test, error: Could not parse fs info on given filesystem format: btrfs. Supported fs types are: xfs, ext3, ext4

[LukeMauldin]

I did some more research and it looks like btrfs support was recently added into Kubernetes mount utilities: kubernetes/mount-utils@f60c4b2

I am using an older version of Kubernetes (1.22.x) and so I don't think btrfs is supported in my version.

[Madhu-1]

@LukeMauldin it is only a client package change, give a try with quay.io/cephcsi/cephcsi:canary image which uses kubernetes 1.24

[LukeMauldin]

If I upgrade to the canary version and I have problems, will it be safe to downgrade back to a 3.6.x release? Any idea when a version of cephcsi that uses Kuberentes 1.24 will be released to stable?

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On Jul 13, 2022, at 11:00 PM, Madhu Rajanna ***@***.***> wrote:  @LukeMauldin it is only a client package change, give a try with quay.io/cephcsi/cephcsi:canary image which uses kubernetes 1.24 — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you were mentioned.

[Madhu-1]

canary is not something to use for production clusters. its only for testing clusters. (canary image is built whenever a PR is merged in master /devel branch). If you want a stable release need to wait for 3.7.0 release (may be in 1 or 2 months)

[LukeMauldin]

Also for the static rbd images, where would I specific mount options such as noatime?

…

On Jul 13, 2022, at 11:00 PM, Madhu Rajanna ***@***.***> wrote:  @LukeMauldin it is only a client package change, give a try with quay.io/cephcsi/cephcsi:canary image which uses kubernetes 1.24 — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you were mentioned.

[Madhu-1]

mount options are need to be added to the storageclass and kubernetes will take care of sending mount options in NodeStageRequest for cephcsi