KB: add "Troubleshooting: RWX Volume Fails to Be Attached Caused by Protocol not supported"
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| ## Symptoms | ||
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| RWX volume fails to be attached, and the workload using the volume fails to start with these messages in logs |
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| RWX volume fails to be attached, and the workload using the volume fails to start with these messages in logs | |
| Attempts to attach an RWX volume are unsuccessful, and the workload using the volume is unable to start. The logs contain the following messages: |
| Oct 11 07:42:23 dev-worker-1-autoscaled-small-19baf778f50efd8c k3s[1294]: Output: mount.nfs: Protocol not supported for 10.43.207.185:/pvc-13538170-4278-4467-b2b0-1f1ba6f54a4c on /var/lib/kubelet/plugins/kubernetes.io/csi/driver.longhorn.io/185c34f566c2eca6e8c7c6a2ede2094c076d7d25ddae286dc633eeef80551af0/globalmount | ||
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| A RWX volume on a host with OpenSUSE MicroOS from 20231008 to 20231021) and other distros using Linux kernel 6.5.6 hits the issue. |
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| A RWX volume on a host with OpenSUSE MicroOS from 20231008 to 20231021) and other distros using Linux kernel 6.5.6 hits the issue. | |
| The issue applies to RWX volumes on hosts running OpenSUSE MicroOS (from 2023/10/08 to 2023/10/21) and other distributions using version 6.5.6 of the Linux kernel. |
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| ## Reason | ||
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| It is a regression of NFS protocol in Linux kernel 6.5.6. As a result, a NFS client fails to connect to a NFS server inside a share-manager pod. |
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| It is a regression of NFS protocol in Linux kernel 6.5.6. As a result, a NFS client fails to connect to a NFS server inside a share-manager pod. | |
| The cause of this issue is a regression of the NFS protocol in Linux kernel 6.5.6. Because of the regression, NFS clients are unable to connect to an NFS server inside a share manager pod. |
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| 1. Upgrade the OS to a newer one with a Linux kernel >= 6.5.7 | ||
| 2. Downgrade the OS to a older one with a Linux kernel <= 6.5.5 |
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| 1. Upgrade the OS to a newer one with a Linux kernel >= 6.5.7 | |
| 2. Downgrade the OS to a older one with a Linux kernel <= 6.5.5 | |
| To address the issue, you can perform the following actions: | |
| 1. Upgrade the operating system to a version using Linux kernel 6.5.7 or later. | |
| 1. Downgrade the operating system to a version using Linux kernel 6.5.5 or earlier. |
derekbit
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Oct 31, 2023
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shuo-wu
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Oct 31, 2023
…Protocol not supported`" Longhorn 6887 Longhorn 6857 Signed-off-by: Derek Su <[email protected]>
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longhorn/longhorn#6887
longhorn/longhorn#6857