How to backup and restore between different namespaces ? #524

jackchuong · 2023-10-18T08:37:10Z

jackchuong
Oct 18, 2023

Hi all.
I have internal K8S cluster (build by K3S)
1 default storageclass csi-driver-nfs install by Helm3, I have 1 QNAP NAS device as NFS server
This is my StorageClass and VolumeSnapshotClass

---
allowVolumeExpansion: true
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: storageclass-csi-nfs-sgnnas03
  annotations:
    storageclass.kubernetes.io/is-default-class: "true"
provisioner: nfs.csi.k8s.io
parameters:
  server: "192.168.7.107"
  share: /k8s-nfs-sgnnas03
reclaimPolicy: Delete
volumeBindingMode: Immediate
mountOptions:
  - hard
  - nfsvers=4.1
---
apiVersion: snapshot.storage.k8s.io/v1
kind: VolumeSnapshotClass
metadata:
  name: csi-nfs-snapclass
  annotations:
    snapshot.storage.kubernetes.io/is-default-class: "true"
driver: nfs.csi.k8s.io
deletionPolicy: Delete

What is detail steps to snapshot a dynamic pvcA from namespace A then restore to a pvcB at namespace B ?
I tried:

create volumesnapshot of pvcA at namespace A

---
apiVersion: snapshot.storage.k8s.io/v1
kind: VolumeSnapshot
metadata:
  name: ocs-snapshot
  namespace: ocs-inventory
spec:
  volumeSnapshotClassName: csi-nfs-snapclass
  source:
    persistentVolumeClaimName: ocs-pvc

--> it creates folder "snapcontent-e382491c-1c12-4fd2-a513-2ed5ee7060a0" with file "pvc-4ff12ffb-e929-4862-8500-078d13041d1c.tar.gz" at nfs server share

kubectl -n ocs-inventory get pvc,volumesnapshot,volumesnapshotcontent
NAME                            STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS                    AGE
persistentvolumeclaim/ocs-pvc   Bound    pvc-4ff12ffb-e929-4862-8500-078d13041d1c   10Gi       RWX            storageclass-csi-nfs-sgnnas03   5d4h

NAME                                                  READYTOUSE   SOURCEPVC   SOURCESNAPSHOTCONTENT   RESTORESIZE   SNAPSHOTCLASS       SNAPSHOTCONTENT                                    CREATIONTIME   AGE
volumesnapshot.snapshot.storage.k8s.io/ocs-snapshot   true         ocs-pvc                             208622773     csi-nfs-snapclass   snapcontent-e382491c-1c12-4fd2-a513-2ed5ee7060a0   12m            15m

NAME                                                                                             READYTOUSE   RESTORESIZE   DELETIONPOLICY   DRIVER           VOLUMESNAPSHOTCLASS   VOLUMESNAPSHOT   VOLUMESNAPSHOTNAMESPACE   AGE
volumesnapshotcontent.snapshot.storage.k8s.io/snapcontent-e382491c-1c12-4fd2-a513-2ed5ee7060a0   true         208622773     Retain           nfs.csi.k8s.io   csi-nfs-snapclass     ocs-snapshot     ocs-inventory             15m

delete above volumesnapshot and volumesnapshotcontent.
create pre-provisioned volumesnapshotcontent name "snapcontent-e382491c-1c12-4fd2-a513-2ed5ee7060a0"
create snapshotvolume link to new volumesnapshotcontent
create pvcB in namespace B with source from new snapshotvolume

---
apiVersion: snapshot.storage.k8s.io/v1
kind: VolumeSnapshotContent
metadata:
  name: snapcontent-e382491c-1c12-4fd2-a513-2ed5ee7060a0
spec:
  deletionPolicy: Retain
  driver: nfs.csi.k8s.io
  source:
    snapshotHandle: 192.168.7.107#k8s-nfs-sgnnas03#snapshot-e382491c-1c12-4fd2-a513-2ed5ee7060a0#snapshot-e382491c-1c12-4fd2-a513-2ed5ee7060a0#pvc-4ff12ffb-e929-4862-8500-078d13041d1c
  volumeSnapshotClassName: csi-nfs-snapclass
  volumeSnapshotRef:
    apiVersion: snapshot.storage.k8s.io/v1
    kind: VolumeSnapshot
    name: restore-snapshot
    namespace: restore
---
apiVersion: snapshot.storage.k8s.io/v1
kind: VolumeSnapshot
metadata:
  name: restore-snapshot
  namespace: restore
spec:
  volumeSnapshotClassName: csi-nfs-snapclass
  source:
    volumeSnapshotContentName: snapcontent-e382491c-1c12-4fd2-a513-2ed5ee7060a0
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: restore-pvc
  namespace: restore
spec:
  storageClassName: storageclass-csi-nfs-sgnnas03
  dataSource:
    name: restore-snapshot
    kind: VolumeSnapshot
    apiGroup: snapshot.storage.k8s.io
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 10Gi

But new volumesnapshotcontent and snapshotvolume have RESTORESIZE=0 , so pvcB keep pending...

kubectl -n restore get pvc,volumesnapshot,volumesnapshotcontent
NAME                                STATUS    VOLUME   CAPACITY   ACCESS MODES   STORAGECLASS                    AGE
persistentvolumeclaim/restore-pvc   Pending                                      storageclass-csi-nfs-sgnnas03   8s

NAME                                                      READYTOUSE   SOURCEPVC   SOURCESNAPSHOTCONTENT                              RESTORESIZE   SNAPSHOTCLASS       SNAPSHOTCONTENT                                    CREATIONTIME   AGE
volumesnapshot.snapshot.storage.k8s.io/restore-snapshot   true                     snapcontent-e382491c-1c12-4fd2-a513-2ed5ee7060a0   0             csi-nfs-snapclass   snapcontent-e382491c-1c12-4fd2-a513-2ed5ee7060a0   4m16s          90s

NAME                                                                                             READYTOUSE   RESTORESIZE   DELETIONPOLICY   DRIVER           VOLUMESNAPSHOTCLASS   VOLUMESNAPSHOT     VOLUMESNAPSHOTNAMESPACE   AGE
volumesnapshotcontent.snapshot.storage.k8s.io/snapcontent-e382491c-1c12-4fd2-a513-2ed5ee7060a0   true         0             Retain           nfs.csi.k8s.io   csi-nfs-snapclass     restore-snapshot   restore                   4m16s

Please give me some adivce, thank you very much.

andyzhangx · 2023-10-18T08:42:09Z

andyzhangx
Oct 18, 2023
Maintainer

we have increased the snapshot timeout as 20min in this PR: #512, RESTORESIZE=0 issue could be due to small snapshot timeout issue, similar issue: #509

10 replies

jackchuong Oct 18, 2023
Author

kubectl -n nfs-provisioner get pod
NAME                                   READY   STATUS    RESTARTS   AGE
snapshot-controller-7c47788447-z4qlv   1/1     Running   0          167m
csi-nfs-node-6bs56                     3/3     Running   0          167m
csi-nfs-controller-59b69c85cc-j554z    4/4     Running   0          167m

kubectl -n nfs-provisioner describe pod csi-nfs-controller-59b69c85cc-j554z
Name:                 csi-nfs-controller-59b69c85cc-j554z
Namespace:            nfs-provisioner
Priority:             2000000000
Priority Class Name:  system-cluster-critical
Service Account:      csi-nfs-controller-sa
Node:                 k3s-hq-master1/192.168.7.200
Start Time:           Wed, 18 Oct 2023 17:26:28 +0700
Labels:               app=csi-nfs-controller
                      app.kubernetes.io/instance=csi-driver-nfs
                      app.kubernetes.io/managed-by=Helm
                      app.kubernetes.io/name=csi-driver-nfs
                      app.kubernetes.io/version=v4.4.0
                      helm.sh/chart=csi-driver-nfs-v4.4.0
                      pod-template-hash=59b69c85cc
Annotations:          <none>
Status:               Running
SeccompProfile:       RuntimeDefault
IP:                   192.168.7.200
IPs:
  IP:           192.168.7.200
Controlled By:  ReplicaSet/csi-nfs-controller-59b69c85cc
Containers:
  csi-provisioner:
    Container ID:  containerd://a352bd75f4ed96e2b2dbc50075798a061b636543254fd0846d51d1c9cd5c2066
    Image:         registry.k8s.io/sig-storage/csi-provisioner:v3.5.0
    Image ID:      registry.k8s.io/sig-storage/csi-provisioner@sha256:d078dc174323407e8cc6f0f9abd4efaac5db27838f1564d0253d5e3233e3f17f
    Port:          <none>
    Host Port:     <none>
    Args:
      -v=2
      --csi-address=$(ADDRESS)
      --leader-election
      --leader-election-namespace=nfs-provisioner
      --extra-create-metadata=true
      --timeout=1200s
    State:          Running
      Started:      Wed, 18 Oct 2023 17:26:30 +0700
    Ready:          True
    Restart Count:  0
    Limits:
      memory:  400Mi
    Requests:
      cpu:     10m
      memory:  20Mi
    Environment:
      ADDRESS:  /csi/csi.sock
    Mounts:
      /csi from socket-dir (rw)
      /var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-fgqfl (ro)
  csi-snapshotter:
    Container ID:  containerd://eca10c2be63cbec2b5b080e6b05880727f5601c0b357531498909e547d9cb240
    Image:         registry.k8s.io/sig-storage/csi-snapshotter:v6.2.2
    Image ID:      registry.k8s.io/sig-storage/csi-snapshotter@sha256:becc53e25b96573f61f7469923a92fb3e9d3a3781732159954ce0d9da07233a2
    Port:          <none>
    Host Port:     <none>
    Args:
      --v=2
      --csi-address=$(ADDRESS)
      --leader-election-namespace=nfs-provisioner
      --leader-election
      --timeout=1200s
    State:          Running
      Started:      Wed, 18 Oct 2023 17:26:30 +0700
    Ready:          True
    Restart Count:  0
    Limits:
      memory:  200Mi
    Requests:
      cpu:     10m
      memory:  20Mi
    Environment:
      ADDRESS:  /csi/csi.sock
    Mounts:
      /csi from socket-dir (rw)
      /var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-fgqfl (ro)
  liveness-probe:
    Container ID:  containerd://8e6b34b4a9af7a67c6187bcfeed4d3860dc9bd086fbaf76671fdd684e36701ff
    Image:         registry.k8s.io/sig-storage/livenessprobe:v2.10.0
    Image ID:      registry.k8s.io/sig-storage/livenessprobe@sha256:4dc0b87ccd69f9865b89234d8555d3a614ab0a16ed94a3016ffd27f8106132ce
    Port:          <none>
    Host Port:     <none>
    Args:
      --csi-address=/csi/csi.sock
      --probe-timeout=3s
      --health-port=29652
      --v=2
    State:          Running
      Started:      Wed, 18 Oct 2023 17:26:31 +0700
    Ready:          True
    Restart Count:  0
    Limits:
      memory:  100Mi
    Requests:
      cpu:        10m
      memory:     20Mi
    Environment:  <none>
    Mounts:
      /csi from socket-dir (rw)
      /var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-fgqfl (ro)
  nfs:
    Container ID:  containerd://232a27d29fea2d180cead5df514a0272d5259e5e33a948f32dd78b90bff37cd4
    Image:         registry.k8s.io/sig-storage/nfsplugin:v4.4.0
    Image ID:      registry.k8s.io/sig-storage/nfsplugin@sha256:971cb526bc0108cca7d8efda32102629cb362f99bbd4879fd381bea1b2014ab4
    Port:          29652/TCP
    Host Port:     29652/TCP
    Args:
      --v=5
      --nodeid=$(NODE_ID)
      --endpoint=$(CSI_ENDPOINT)
      --drivername=nfs.csi.k8s.io
      --mount-permissions=0
      --working-mount-dir=/tmp
      --default-ondelete-policy=delete
    State:          Running
      Started:      Wed, 18 Oct 2023 17:26:31 +0700
    Ready:          True
    Restart Count:  0
    Limits:
      memory:  200Mi
    Requests:
      cpu:     10m
      memory:  20Mi
    Liveness:  http-get http://:healthz/healthz delay=30s timeout=10s period=30s #success=1 #failure=5
    Environment:
      NODE_ID:        (v1:spec.nodeName)
      CSI_ENDPOINT:  unix:///csi/csi.sock
    Mounts:
      /csi from socket-dir (rw)
      /tmp from tmp-dir (rw)
      /var/lib/kubelet/pods from pods-mount-dir (rw)
      /var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-fgqfl (ro)
Conditions:
  Type              Status
  Initialized       True
  Ready             True
  ContainersReady   True
  PodScheduled      True
Volumes:
  pods-mount-dir:
    Type:          HostPath (bare host directory volume)
    Path:          /var/lib/kubelet/pods
    HostPathType:  Directory
  socket-dir:
    Type:       EmptyDir (a temporary directory that shares a pod's lifetime)
    Medium:
    SizeLimit:  <unset>
  tmp-dir:
    Type:       EmptyDir (a temporary directory that shares a pod's lifetime)
    Medium:
    SizeLimit:  <unset>
  kube-api-access-fgqfl:
    Type:                    Projected (a volume that contains injected data from multiple sources)
    TokenExpirationSeconds:  3607
    ConfigMapName:           kube-root-ca.crt
    ConfigMapOptional:       <nil>
    DownwardAPI:             true
QoS Class:                   Burstable
Node-Selectors:              kubernetes.io/os=linux
Tolerations:                 node-role.kubernetes.io/control-plane:NoSchedule op=Exists
                             node-role.kubernetes.io/controlplane:NoSchedule op=Exists
                             node-role.kubernetes.io/master:NoSchedule op=Exists
                             node.kubernetes.io/not-ready:NoExecute op=Exists for 300s
                             node.kubernetes.io/unreachable:NoExecute op=Exists for 300s
Events:                      <none>

kubectl -n nfs-provisioner logs csi-nfs-controller-59b69c85cc-j554z
I1018 10:26:30.381271       1 feature_gate.go:249] feature gates: &{map[]}
I1018 10:26:30.381486       1 csi-provisioner.go:154] Version: v3.5.0
I1018 10:26:30.381509       1 csi-provisioner.go:177] Building kube configs for running in cluster...
I1018 10:26:32.539444       1 common.go:111] Probing CSI driver for readiness
I1018 10:26:32.545542       1 csi-provisioner.go:230] Detected CSI driver nfs.csi.k8s.io
I1018 10:26:32.549209       1 csi-provisioner.go:302] CSI driver does not support PUBLISH_UNPUBLISH_VOLUME, not watching VolumeAttachments
I1018 10:26:32.549961       1 controller.go:732] Using saving PVs to API server in background
I1018 10:26:32.550493       1 leaderelection.go:245] attempting to acquire leader lease nfs-provisioner/nfs-csi-k8s-io...
I1018 10:26:51.204680       1 leaderelection.go:255] successfully acquired lease nfs-provisioner/nfs-csi-k8s-io
I1018 10:26:51.204845       1 leader_election.go:178] became leader, starting
I1018 10:26:51.305147       1 volume_store.go:97] Starting save volume queue
I1018 10:26:51.305146       1 clone_controller.go:66] Starting CloningProtection controller
I1018 10:26:51.305267       1 clone_controller.go:82] Started CloningProtection controller
I1018 10:26:51.305162       1 controller.go:811] Starting provisioner controller nfs.csi.k8s.io_k3s-hq-master1_f5ea6737-c967-4f12-8420-a380ca702653!
I1018 10:26:51.407009       1 controller.go:860] Started provisioner controller nfs.csi.k8s.io_k3s-hq-master1_f5ea6737-c967-4f12-8420-a380ca702653!

andyzhangx Oct 18, 2023
Maintainer

what's the logs of kubectl -n nfs-provisioner logs csi-nfs-controller-59b69c85cc-j554z -c nfs

jackchuong Oct 19, 2023
Author

kubectl -n nfs-provisioner logs csi-nfs-controller-59b69c85cc-j554z -c nfs
I1018 10:26:31.770171       1 nfs.go:76] Driver: nfs.csi.k8s.io version: v4.4.0
I1018 10:26:31.770505       1 nfs.go:115]
DRIVER INFORMATION:
-------------------
Build Date: "2023-06-07T11:31:40Z"
Compiler: gc
Driver Name: nfs.csi.k8s.io
Driver Version: v4.4.0
Git Commit: ""
Go Version: go1.19
Platform: linux/amd64

Streaming logs below:
I1018 10:26:31.779790       1 mount_linux.go:284] Detected umount with safe 'not mounted' behavior
I1018 10:26:31.783311       1 server.go:117] Listening for connections on address: &net.UnixAddr{Name:"//csi/csi.sock", Net:"unix"}
I1018 10:26:31.956218       1 utils.go:106] GRPC call: /csi.v1.Identity/GetPluginInfo
I1018 10:26:31.956248       1 utils.go:107] GRPC request: {}
I1018 10:26:31.958503       1 utils.go:113] GRPC response: {"name":"nfs.csi.k8s.io","vendor_version":"v4.4.0"}
I1018 10:26:31.960368       1 utils.go:106] GRPC call: /csi.v1.Controller/ControllerGetCapabilities
I1018 10:26:31.960397       1 utils.go:107] GRPC request: {}
I1018 10:26:31.960459       1 utils.go:113] GRPC response: {"capabilities":[{"Type":{"Rpc":{"type":1}}},{"Type":{"Rpc":{"type":13}}},{"Type":{"Rpc":{"type":7}}},{"Type":{"Rpc":{"type":5}}}]}
I1018 10:26:32.350124       1 utils.go:106] GRPC call: /csi.v1.Identity/GetPluginInfo
I1018 10:26:32.350166       1 utils.go:107] GRPC request: {}
I1018 10:26:32.350254       1 utils.go:113] GRPC response: {"name":"nfs.csi.k8s.io","vendor_version":"v4.4.0"}
I1018 10:26:32.545041       1 utils.go:106] GRPC call: /csi.v1.Identity/GetPluginInfo
I1018 10:26:32.545071       1 utils.go:107] GRPC request: {}
I1018 10:26:32.545154       1 utils.go:113] GRPC response: {"name":"nfs.csi.k8s.io","vendor_version":"v4.4.0"}
I1018 10:26:32.545901       1 utils.go:106] GRPC call: /csi.v1.Identity/GetPluginCapabilities
I1018 10:26:32.545925       1 utils.go:107] GRPC request: {}
I1018 10:26:32.546037       1 utils.go:113] GRPC response: {"capabilities":[{"Type":{"Service":{"type":1}}}]}
I1018 10:26:32.548100       1 utils.go:106] GRPC call: /csi.v1.Controller/ControllerGetCapabilities
I1018 10:26:32.548147       1 utils.go:107] GRPC request: {}
I1018 10:26:32.548246       1 utils.go:113] GRPC response: {"capabilities":[{"Type":{"Rpc":{"type":1}}},{"Type":{"Rpc":{"type":13}}},{"Type":{"Rpc":{"type":7}}},{"Type":{"Rpc":{"type":5}}}]}

andyzhangx Oct 19, 2023
Maintainer

@jackchuong there are multiple nfs controller replicas, the above logs shows this replica is an idle pod. could you get logs of other replica?

jackchuong Oct 19, 2023
Author

there is only 1 nfs controllder replica

kubectl -n nfs-provisioner get pod
NAME                                   READY   STATUS    RESTARTS   AGE
snapshot-controller-7c47788447-z4qlv   1/1     Running   0          17h
csi-nfs-node-6bs56                     3/3     Running   0          17h
csi-nfs-controller-59b69c85cc-j554z    4/4     Running   0          17h

jackchuong · 2023-10-20T04:59:55Z

jackchuong
Oct 20, 2023
Author

What is exactly detail steps to snapshot a pvc and restore another pvc (at different namespace or cluster) from it ?
I created a snapshot from pvc

---
apiVersion: snapshot.storage.k8s.io/v1
kind: VolumeSnapshot
metadata:
  name: ocs-snapshot
  namespace: ocs-inventory
spec:
  volumeSnapshotClassName: csi-nfs-snapclass
  source:
    persistentVolumeClaimName: ocs-pvc

kubectl -n ocs-inventory get volumesnapshot,volumesnapshotcontent
NAME                                                  READYTOUSE   SOURCEPVC   SOURCESNAPSHOTCONTENT   RESTORESIZE   SNAPSHOTCLASS       SNAPSHOTCONTENT                                    CREATIONTIME   AGE
volumesnapshot.snapshot.storage.k8s.io/ocs-snapshot   true         ocs-pvc                             208190461     csi-nfs-snapclass   snapcontent-e9b061a7-d8db-4ccb-97de-def18f548c6a   7m21s          8m17s

NAME                                                                                                  READYTOUSE   RESTORESIZE   DELETIONPOLICY   DRIVER           VOLUMESNAPSHOTCLASS   VOLUMESNAPSHOT     VOLUMESNAPSHOTNAMESPACE   AGE
volumesnapshotcontent.snapshot.storage.k8s.io/snapcontent-e9b061a7-d8db-4ccb-97de-def18f548c6a        true         208190461     Delete           nfs.csi.k8s.io   csi-nfs-snapclass     ocs-snapshot       ocs-inventory             8m16s

It created a folder "snapshot-e9b061a7-d8db-4ccb-97de-def18f548c6a" with file "pvc-4ff12ffb-e929-4862-8500-078d13041d1c.tar.gz" size 200MB in nfs share.
I clone above folder to "snapshot-e9b061a7-d8db-4ccb-97de-def18f548c6a-copy" including file "pvc-4ff12ffb-e929-4862-8500-078d13041d1c.tar.gz" inside.

I try to create pre-provisioned volumesnapshotcontent

---
apiVersion: snapshot.storage.k8s.io/v1
kind: VolumeSnapshotContent
metadata:
  name: snapcontent-e9b061a7-d8db-4ccb-97de-def18f548c6a-copy
spec:
  deletionPolicy: Delete
  driver: nfs.csi.k8s.io
  source:
    snapshotHandle: 192.168.7.107#k8s-nfs-sgnnas03#snapshot-e9b061a7-d8db-4ccb-97de-def18f548c6a-copy#snapshot-e9b061a7-d8db-4ccb-97de-def18f548c6a-copy#pvc-4ff12ffb-e929-4862-8500-078d13041d1c
  volumeSnapshotClassName: csi-nfs-snapclass
  volumeSnapshotRef:
    apiVersion: snapshot.storage.k8s.io/v1
    kind: VolumeSnapshot
    name: restore-snapshot
    namespace: restore

But it doesn't work (RESTORESIZE=0)

kubectl -n ocs-inventory get volumesnapshot,volumesnapshotcontent
NAME                                                  READYTOUSE   SOURCEPVC   SOURCESNAPSHOTCONTENT   RESTORESIZE   SNAPSHOTCLASS       SNAPSHOTCONTENT                                    CREATIONTIME   AGE
volumesnapshot.snapshot.storage.k8s.io/ocs-snapshot   true         ocs-pvc                             208190461     csi-nfs-snapclass   snapcontent-e9b061a7-d8db-4ccb-97de-def18f548c6a   15m            16m

NAME                                                                                                  READYTOUSE   RESTORESIZE   DELETIONPOLICY   DRIVER           VOLUMESNAPSHOTCLASS   VOLUMESNAPSHOT     VOLUMESNAPSHOTNAMESPACE   AGE
volumesnapshotcontent.snapshot.storage.k8s.io/snapcontent-e9b061a7-d8db-4ccb-97de-def18f548c6a        true         208190461     Delete           nfs.csi.k8s.io   csi-nfs-snapclass     ocs-snapshot       ocs-inventory             16m
volumesnapshotcontent.snapshot.storage.k8s.io/snapcontent-e9b061a7-d8db-4ccb-97de-def18f548c6a-copy   true         0             Delete           nfs.csi.k8s.io   csi-nfs-snapclass     restore-snapshot   restore                   10m

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How to backup and restore between different namespaces ? #524

jackchuong Oct 18, 2023

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