On Fri, May 29, 2020 at 11:38 AM Palanisamy <palaniecestar@xxxxxxxxx> wrote:
> Hello Team,
>
> Can I get any update on this request.
>
The Ceph team is not really involved in the out-of-tree rbd-provisioner.
Both the in-tree and this out-of-tree RBD provisioner are deprecated to the
ceph-csi [1][2] RBD provisioner. The ceph-csi provisioner also creates RBD
images using UUIDs since that's what k8s provides to the driver (it never
provides the namespace / PVC name). The difference is that ceph-csi
provides a tool to map the image names [3] back to the PVC/PV in k8s -- and
additional work is underway to expose this mapping via an endpoint like
Prometheus so that the mappings are available all the time (even for
third-party apps).
>
> *Best Regards,*
> *Palanisamy*
>
>
> On Fri, Nov 22, 2019 at 1:53 PM Palanisamy <palaniecestar@xxxxxxxxx>
> wrote:
>
> > Hello Team,
> >
> > We've integrated Ceph cluster storage with Kubernetes and provisioning
> > volumes through rbd-provisioner. When we're creating volumes from yaml
> > files in Kubernetes, pv > pvc > mounting to pod, In kubernetes end pvc
> are
> > showing as meaningful naming convention as per yaml file defined. But in
> > ceph cluster, rbd image name is creating with dynamic uid.
> >
> > During troubleshooting time, this will be tedious to find exact rbd
> image.
> > Please find the provisioning logs in below pasted snippet.
> >
> > kubectl get pods,pv,pvc
> > NAME READY STATUS RESTARTS AGE
> > pod/sleepypod 1/1 Running 0 4m9s
> >
> > NAME CAPACITY ACCESS MODES RECLAIM POLICY STATUS CLAIM STORAGECLASS
> REASON
> > AGE
> > persistentvolume/pvc-cd37d2d6-cecc-4a05-9736-c8d80abde7f5 1Gi RWO Delete
> > Bound default/test-dyn-pvc ceph-rbd 4m9s
> >
> > NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
> > persistentvolumeclaim/test-dyn-pvc Bound
> > pvc-cd37d2d6-cecc-4a05-9736-c8d80abde7f5 1Gi RWO ceph-rbd 4m11s
> >
> > *rbd-provisioner logs*
> >
> > I1121 10:59:15.009012 1 provision.go:132] successfully created rbd image
> > "kubernetes-dynamic-pvc-f4eac482-0c4d-11ea-8d70-8a582e0eb4e2" I1121
> > 10:59:15.009092 1 controller.go:1087] provision "default/test-dyn-pvc"
> > class "ceph-rbd": volume "pvc-cd37d2d6-cecc-4a05-9736-c8d80abde7f5"
> > provisioned I1121 10:59:15.009138 1 controller.go:1101] provision
> > "default/test-dyn-pvc" class "ceph-rbd": trying to save persistentvvolume
> > "pvc-cd37d2d6-cecc-4a05-9736-c8d80abde7f5" I1121 10:59:15.020418 1
> > controller.go:1108] provision "default/test-dyn-pvc" class "ceph-rbd":
> > persistentvolume "pvc-cd37d2d6-cecc-4a05-9736-c8d80abde7f5" saved I1121
> > 10:59:15.020476 1 controller.go:1149] provision "default/test-dyn-pvc"
> > class "ceph-rbd": succeeded I1121 10:59:15.020802 1 event.go:221]
> > Event(v1.ObjectReference{Kind:"PersistentVolumeClaim",
> Namespace:"default",
> > Name:"test-dyn-pvc", UID:"cd37d2d6-cecc-4a05-9736-c8d80abde7f5",
> > APIVersion:"v1", ResourceVersion:"24545639", FieldPath:""}): type:
> 'Normal'
> > reason: 'ProvisioningSucceeded' Successfully provisioned volume
> > pvc-cd37d2d6-cecc-4a05-9736-c8d80abde7f5
> >
> > *rbd image details in Ceph cluster end*
> >
> > rbd -p kube ls --long
> > NAME SIZE PARENT FMT PROT LOCK
> > kubernetes-dynamic-pvc-f4eac482-0c4d-11ea-8d70-8a582e0eb4e2 1 GiB 2
> >
> > is there way to setup proper naming convention for rbd image as well
> > during kubernetes deployment itself.
> >
> > Kubernetes version: v1.15.5
> > Ceph cluster version: 14.2.2 nautilus (stable)
> > *Best Regards,*
> > *Palanisamy*
> >
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>
[1] https://github.com/ceph/ceph-csi
[2] https://docs.ceph.com/docs/master/rbd/rbd-kubernetes/
[3]
https://github.com/ceph/ceph-csi/blob/master/troubleshooting/tools/tracevol.py
--
Jason
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