Lab 8.3: NFS volume fails to mount

Hello,
I was going to ask for some guidance, but just figured out the solution. I'll post it here in-case anyone encounters the same problem.
I was stuck between step 7 & 8 of lab 8.3.
PV and PVC were created OK, but the pod created in step 6 seems to fail to mount the NFS volume and I was uncertain whether I made a mistake or if there's was another problem.
kubectl get pods
:
NAME READY STATUS RESTARTS AGE nginx-nfs-5f58fd64fd-qsqs8 0/1 ContainerCreating 0 16m
kubectl describe pod nginx-nfs-5f58fd64fd-qsqs8
:
Name: nginx-nfs-5f58fd64fd-qsqs8 Namespace: default Priority: 0 Node: k8s-worker/172.31.46.65 Start Time: Wed, 21 Jul 2021 16:14:36 +0000 Labels: pod-template-hash=5f58fd64fd run=nginx Annotations: <none> Status: Pending IP: IPs: <none> Controlled By: ReplicaSet/nginx-nfs-5f58fd64fd Containers: nginx: Container ID: Image: nginx Image ID: Port: 80/TCP Host Port: 0/TCP State: Waiting Reason: ContainerCreating Ready: False Restart Count: 0 Environment: <none> Mounts: /opt from nfs-vol (rw) /var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-jg5t5 (ro) Conditions: Type Status Initialized True Ready False ContainersReady False PodScheduled True Volumes: nfs-vol: Type: PersistentVolumeClaim (a reference to a PersistentVolumeClaim in the same namespace) ClaimName: pvc-one ReadOnly: false kube-api-access-jg5t5: Type: Projected (a volume that contains injected data from multiple sources) TokenExpirationSeconds: 3607 ConfigMapName: kube-root-ca.crt ConfigMapOptional: <nil> DownwardAPI: true QoS Class: BestEffort Node-Selectors: <none> Tolerations: node.kubernetes.io/not-ready:NoExecute op=Exists for 300s node.kubernetes.io/unreachable:NoExecute op=Exists for 300s Events: Type Reason Age From Message ---- ------ ---- ---- ------- Normal Scheduled 16m default-scheduler Successfully assigned default/nginx-nfs-5f58fd64fd-qsqs8 to k8s-worker Warning FailedMount 3m4s (x3 over 9m54s) kubelet Unable to attach or mount volumes: unmounted volumes=[nfs-vol], unattached volumes=[kube-api-access-jg5t5 nfs-vol]: timed out waiting for the condition Warning FailedMount 47s (x4 over 14m) kubelet Unable to attach or mount volumes: unmounted volumes=[nfs-vol], unattached volumes=[nfs-vol kube-api-access-jg5t5]: timed out waiting for the condition Warning FailedMount 10s (x16 over 16m) kubelet MountVolume.SetUp failed for volume "pvvol-1" : mount failed: exit status 32 Mounting command: mount Mounting arguments: -t nfs k8scp:/opt/sfw /var/lib/kubelet/pods/c79023bd-4e26-4ffd-b065-a198c8c03303/volumes/kubernetes.io~nfs/pvvol-1 Output: mount: /var/lib/kubelet/pods/c79023bd-4e26-4ffd-b065-a198c8c03303/volumes/kubernetes.io~nfs/pvvol-1: bad option; for several filesystems (e.g. nfs, cifs) you might need a /sbin/mount.<type> helper program.
Googling the error message suggested failure to install nfs-common, but it was installed on the cp node. While preparing this post I realized the pod is running on the worker node which didn't have it.
Running sudo apt -y install nfs-common
there and then recreating the pod resolved the problem.
I see I missed that 8.2 step 5 should've been run on the worker node, so my mistake.
Comments
-
Thanks for this hint!
0 -
Hi, I did the whole thing, including the "nfs-common" and I am not making any progress. I am not sure if someone has faced the same problem.
0 -
Hi @lzambra,
Please provide the sequence of commands you executed on each node, part of the nfs installation, and their corresponding outputs.
Regards,
-Chris0
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