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gluster / gluster-csi-driver

DEPRECATED: Gluster Container Storage Interface (CSI) driver
GNU Lesser General Public License v3.0
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Block volume mount fails if no loop devices are present on the host #168

Closed poornimag closed 5 years ago

poornimag commented 5 years ago

When we create a pvc of glustervirtblock storage class, and try to bind mount it in any application container, the attachvolume req fails:

  Normal   SuccessfulAttachVolume  6m41s                  attachdetach-controller  AttachVolume.Attach succeeded for volume "pvc-ad946394-2b8d-11e9-83aa-5254005270e0"
  Warning  FailedMount             13s (x11 over 6m25s)   kubelet, kube2           MountVolume.SetUp failed for volume "pvc-ad946394-2b8d-11e9-83aa-5254005270e0" : rpc error: code = Internal desc = mount failed: exit status 32
Mounting command: mount
Mounting arguments: -t xfs /mnt/blockhostvol/block_hosting_volume_4a7dc70a-77aa-4fad-9c7e-1f91ef4cd25d/pvc-ad946394-2b8d-11e9-83aa-5254005270e0 /var/lib/kubelet/pods/adae0953-2b8d-11e9-83aa-5254005270e0/volumes/kubernetes.io~csi/pvc-ad946394-2b8d-11e9-83aa-5254005270e0/mount
Output: mount: /mnt/blockhostvol/block_hosting_volume_4a7dc70a-77aa-4fad-9c7e-1f91ef4cd25d/pvc-ad946394-2b8d-11e9-83aa-5254005270e0: failed to setup loop device: No such file or directory
  Warning  FailedMount  5s (x3 over 4m39s)  kubelet, kube2  Unable to mount volumes for pod "fs-performance-qrd54_default(adae0953-2b8d-11e9-83aa-5254005270e0)": timeout expired waiting for volumes to attach or mount for pod "default"/"fs-performance-qrd54". list of unmounted volumes=[target]. list of unattached volumes=[target default-token-l4pjc]

Expected behavior The PVC should get attached

Additional context Workaround for this is to mknod loop devices (/dev/loop{0..n}) before nodeplugin tries to mount the block volumes. One of the suggestions is to create an init container in the csi-nodeplugin-glusterblock, that does the required prework.

poornimag commented 5 years ago

This shall be a blocker, will be addressed ASAP.

amarts commented 5 years ago

this is addressed by gluster/gcs#137