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Bug 1512816 - Failed to create snapshot for a PVC which was used by a Pod on Openstack
Summary: Failed to create snapshot for a PVC which was used by a Pod on Openstack
Alias: None
Product: OpenShift Container Platform
Classification: Red Hat
Component: Storage
Version: 3.7.0
Hardware: Unspecified
OS: Unspecified
Target Milestone: ---
: 3.9.0
Assignee: Tomas Smetana
QA Contact: Jianwei Hou
Depends On:
TreeView+ depends on / blocked
Reported: 2017-11-14 08:09 UTC by Qin Ping
Modified: 2018-01-10 08:20 UTC (History)
5 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
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Clone Of:
Last Closed: 2018-01-10 08:20:47 UTC
Target Upstream Version:

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Description Qin Ping 2017-11-14 08:09:59 UTC
Description of problem:
When a PVC was used by a Pod, creating snapshot for it will report error.

Version-Release number of selected component (if applicable):
oc v3.7.7
kubernetes v1.7.6+a08f5eeb62
features: Basic-Auth GSSAPI Kerberos SPNEGO


How reproducible:

Steps to Reproduce:
1. Deploy an OCP cluster on openstack
2. Install packages named "openshift-external-storage-snapshot*" on all masters.
3. Start snapshot controller and provisioner on the master.
4. Create a new project mytest
5. Create a PVC named cinder-pvc with dynamic provisioning
6. Create a pod named cinder-pod using PVC cinder-pvc
7. Write some data into the PVC
8. Create a snapshot for PVC cinder-pvc
9. Check volumesnapshot and volumesnapshotdata

Actual results:
No volumesnapshotdata was created.

Expected results:
volumesnapshot and volumesnapshotdata were created successfully.

Additional info:
Delete the Pod cinder-pod and create snapshot for PVC cinder-pvc, then the volumesnapshot and volumesnapshotdata were created successfully.

snapshot-controller logs:
E1114 02:32:35.999455   62309 openstack_snapshots.go:163] Failed to snapshot volume acdc4f00-1719-489a-950e-e3bd6dd0f824 : Invalid request due to incorrect syntax or missing required parameters.
W1114 02:32:35.999585   62309 snapshotter.go:292] failed to snapshot &v1.PersistentVolumeSpec{Capacity:v1.ResourceList{"storage":resource.Quantity{i:resource.int64Amount{value:4294967296, scale:0}, d:resource.infDecAmount{Dec:(*inf.Dec)(nil)}, s:"4Gi", Format:"BinarySI"}}, PersistentVolumeSource:v1.PersistentVolumeSource{GCEPersistentDisk:(*v1.GCEPersistentDiskVolumeSource)(nil), AWSElasticBlockStore:(*v1.AWSElasticBlockStoreVolumeSource)(nil), HostPath:(*v1.HostPathVolumeSource)(nil), Glusterfs:(*v1.GlusterfsVolumeSource)(nil), NFS:(*v1.NFSVolumeSource)(nil), RBD:(*v1.RBDVolumeSource)(nil), ISCSI:(*v1.ISCSIVolumeSource)(nil), Cinder:(*v1.CinderVolumeSource)(0xc4208dd890), CephFS:(*v1.CephFSVolumeSource)(nil), FC:(*v1.FCVolumeSource)(nil), Flocker:(*v1.FlockerVolumeSource)(nil), FlexVolume:(*v1.FlexVolumeSource)(nil), AzureFile:(*v1.AzureFileVolumeSource)(nil), VsphereVolume:(*v1.VsphereVirtualDiskVolumeSource)(nil), Quobyte:(*v1.QuobyteVolumeSource)(nil), AzureDisk:(*v1.AzureDiskVolumeSource)(nil), PhotonPersistentDisk:(*v1.PhotonPersistentDiskVolumeSource)(nil), PortworxVolume:(*v1.PortworxVolumeSource)(nil), ScaleIO:(*v1.ScaleIOVolumeSource)(nil), Local:(*v1.LocalVolumeSource)(nil), StorageOS:(*v1.StorageOSPersistentVolumeSource)(nil)}, AccessModes:[]v1.PersistentVolumeAccessMode{"ReadWriteOnce"}, ClaimRef:(*v1.ObjectReference)(0xc420353dc0), PersistentVolumeReclaimPolicy:"Delete", StorageClassName:"standard"}, err: Invalid request due to incorrect syntax or missing required parameters.

Comment 1 Tomas Smetana 2017-11-14 11:15:08 UTC
Cinder is not a backend we plan to support in the tech preview. Not that this bug was not real but it can't qualify as a blocker.

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