mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-11-17 20:00:23 +00:00
Doc for cephfs expand PVC
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
This commit is contained in:
Madhu Rajanna
mergify[bot]
parent
7df51846da
commit
369fdb5051
@ -1,21 +1,30 @@
|
||||
# Resize RBD PVCs
|
||||
# Dynamically Expand Volume
|
||||
|
||||
For filesystem resize to be supported for your kubernetes
|
||||
cluster, the kubernetes version running in your cluster
|
||||
should be >= v1.15 and for block volume resize support
|
||||
the kubernetes version should be >=1.16. Also, `ExpandCSIVolumes`
|
||||
feature gate has to be enabled for the volume resize
|
||||
functionality to work.
|
||||
- [Dynamically Expand Volume](#dynamically-expand-volume)
|
||||
- [Prerequisite](#prerequisite)
|
||||
- [Expand RBD PVCs](#expand-rbd-pvcs)
|
||||
- [Expand RBD Filesystem PVC](#expand-rbd-filesystem-pvc)
|
||||
- [Expand RBD Block PVC](#expand-rbd-block-pvc)
|
||||
- [Expand CephFS PVC](#expand-cephfs-pvc)
|
||||
- [Expand CephFS Filesystem PVC](#expand-cephfs-filesystem-pvc)
|
||||
|
||||
- [Resize RBD PVCs](#resize-rbd-pvcs)
|
||||
- [Filesystem resize on RBD filesystem volume mode PVCs](#filesystem-resize-on-rbd-filesystem-volume-mode-pvcs)
|
||||
- [Resize Block PVC](#resize-block-pvc)
|
||||
## Prerequisite
|
||||
|
||||
## Filesystem resize on RBD filesystem volume mode PVCs
|
||||
- For filesystem resize to be supported for your kubernetes cluster, the
|
||||
kubernetes version running in your cluster should be >= v1.15 and for block
|
||||
volume resize support the kubernetes version should be >=1.16. Also,
|
||||
`ExpandCSIVolumes` feature gate has to be enabled for the volume resize
|
||||
functionality to work.
|
||||
|
||||
- The controlling StorageClass must have allowVolumeExpansion set to true.
|
||||
|
||||
### Expand RBD PVCs
|
||||
|
||||
#### Expand RBD Filesystem PVC
|
||||
|
||||
pvc.yaml
|
||||
|
||||
```
|
||||
```yaml
|
||||
apiVersion: v1
|
||||
items:
|
||||
- apiVersion: v1
|
||||
@ -56,16 +65,14 @@ metadata:
|
||||
|
||||
- mounted Filesystem size in pod using this PVC
|
||||
|
||||
```
|
||||
```bash
|
||||
[$]kubectl exec -it csi-rbd-demo-pod sh
|
||||
# df -h /var/lib/www/html
|
||||
Filesystem Size Used Avail Use% Mounted on
|
||||
/dev/rbd0 976M 2.6M 958M 1% /var/lib/www/html
|
||||
#
|
||||
|
||||
```
|
||||
|
||||
- Now resize the PVC by editing the PVC (pvc.spec.resource.requests.storage)
|
||||
- Now expand the PVC by editing the PVC (pvc.spec.resource.requests.storage)
|
||||
|
||||
```bash
|
||||
[$]kubectl edit pvc rbd-pvc
|
||||
@ -73,7 +80,7 @@ Filesystem Size Used Avail Use% Mounted on
|
||||
|
||||
Check PVC status after editing the pvc storage
|
||||
|
||||
```console
|
||||
```yaml
|
||||
apiVersion: v1
|
||||
items:
|
||||
- apiVersion: v1
|
||||
@ -117,7 +124,6 @@ kind: List
|
||||
metadata:
|
||||
resourceVersion: ""
|
||||
selfLink: ""
|
||||
|
||||
```
|
||||
|
||||
Now you can see the pvc status as `FileSystemResizePending`, once the kubelet
|
||||
@ -128,7 +134,6 @@ and `status` will be updated
|
||||
[$]kubectl get pvc
|
||||
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
|
||||
rbd-pvc Bound pvc-efe688d6-a420-4041-900e-c5e19fd73ebf 10Gi RWO csi-rbd-sc 7m6s
|
||||
|
||||
```
|
||||
|
||||
- Now let us check the directory size inside the pod where PVC is mounted
|
||||
@ -142,7 +147,7 @@ Filesystem Size Used Avail Use% Mounted on
|
||||
|
||||
now you can see the size of `/var/lib/www/html` is updated from 976M to 9.9G
|
||||
|
||||
## Resize Block PVC
|
||||
#### Expand RBD Block PVC
|
||||
|
||||
```bash
|
||||
[$]kubectl get pvc raw-block-pvc -o yaml
|
||||
@ -189,19 +194,18 @@ sh-4.4# blockdev --getsize64 /dev/xvda
|
||||
rbd Block PVC is mounted at `/dev/xvda` of the pod, and the size is `1073741824`
|
||||
bytes which is equal to `1Gib`
|
||||
|
||||
- Now resize the PVC
|
||||
- Now expand the PVC
|
||||
|
||||
To resize PVC, change `(pvc.spec.resource.requests.storage)` to the new size
|
||||
To expand PVC, change `(pvc.spec.resource.requests.storage)` to the new size
|
||||
which should be greater than the current size.
|
||||
|
||||
```bash
|
||||
[$]kubectl edit pvc raw-block-pvc
|
||||
|
||||
```
|
||||
|
||||
Check PVC status after editing the pvc storage
|
||||
|
||||
```console
|
||||
```yaml
|
||||
apiVersion: v1
|
||||
kind: PersistentVolumeClaim
|
||||
metadata:
|
||||
@ -239,7 +243,6 @@ status:
|
||||
status: "True"
|
||||
type: FileSystemResizePending
|
||||
phase: Bound
|
||||
|
||||
```
|
||||
|
||||
Now you can see the pvc stats as FileSystemResizePending, once the kubelet calls
|
||||
@ -247,22 +250,138 @@ the NodeExpandVolume to resize the PVC on node, the status conditions will be up
|
||||
and status.capacity.storage will be updated.
|
||||
|
||||
```bash
|
||||
|
||||
[$]kubectl get pvc
|
||||
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
|
||||
raw-block-pvc Bound pvc-efe688d6-a420-4041-900e-c5e19fd73ebf 10Gi RWO csi-rbd-sc 7m6s
|
||||
|
||||
```
|
||||
|
||||
Device size in pod using this PVC
|
||||
|
||||
```bash
|
||||
|
||||
[$]kubectl exec -it pod-with-raw-block-volume sh
|
||||
sh-4.4# blockdev --getsize64 /dev/xvda
|
||||
10737418240
|
||||
|
||||
```
|
||||
|
||||
rbd Block PVC is mounted at `/dev/xvda` of the pod, and the size is
|
||||
`10737418240` bytes which is equal to `10Gib`
|
||||
|
||||
### Expand CephFS PVC
|
||||
|
||||
#### Expand CephFS Filesystem PVC
|
||||
|
||||
pvc.yaml
|
||||
|
||||
```yaml
|
||||
apiVersion: v1
|
||||
items:
|
||||
- apiVersion: v1
|
||||
kind: PersistentVolumeClaim
|
||||
metadata:
|
||||
annotations:
|
||||
pv.kubernetes.io/bind-completed: "yes"
|
||||
pv.kubernetes.io/bound-by-controller: "yes"
|
||||
volume.beta.kubernetes.io/storage-provisioner: cephfs.csi.ceph.com
|
||||
creationTimestamp: "2020-01-17T07:55:11Z"
|
||||
finalizers:
|
||||
- kubernetes.io/pvc-protection
|
||||
name: csi-cephfs-pvc
|
||||
namespace: default
|
||||
resourceVersion: "5955"
|
||||
selfLink: /api/v1/namespaces/default/persistentvolumeclaims/csi-cephfs-pvc
|
||||
uid: b84d07c9-ea67-40b4-96b9-4a79669b1ccc
|
||||
spec:
|
||||
accessModes:
|
||||
- ReadWriteMany
|
||||
resources:
|
||||
requests:
|
||||
storage: 5Gi
|
||||
storageClassName: csi-cephfs-sc
|
||||
volumeMode: Filesystem
|
||||
volumeName: pvc-b84d07c9-ea67-40b4-96b9-4a79669b1ccc
|
||||
status:
|
||||
accessModes:
|
||||
- ReadWriteMany
|
||||
capacity:
|
||||
storage: 5Gi
|
||||
phase: Bound
|
||||
kind: List
|
||||
metadata:
|
||||
resourceVersion: ""
|
||||
selfLink: ""
|
||||
```
|
||||
|
||||
- mounted Filesystem size in pod using this PVC
|
||||
|
||||
```bash
|
||||
[$]kubectl exec -it csi-cephfs-demo-pod sh
|
||||
# df -h /var/lib/www
|
||||
Filesystem Size Used Avail Use% Mounted on
|
||||
10.108.149.216:6789:/volumes/csi/csi-vol-b0a1bc79-38fe-11ea-adb6-1a2797ee96de 5.0G 0 5.0G 0% /var/lib/www
|
||||
```
|
||||
|
||||
- Now expand the PVC by editing the PVC (pvc.spec.resource.requests.storage)
|
||||
|
||||
```bash
|
||||
[$]kubectl edit pvc csi-cephfs-pvc
|
||||
```
|
||||
|
||||
Check PVC status after editing the pvc storage
|
||||
|
||||
```yaml
|
||||
apiVersion: v1
|
||||
items:
|
||||
- apiVersion: v1
|
||||
kind: PersistentVolumeClaim
|
||||
metadata:
|
||||
annotations:
|
||||
pv.kubernetes.io/bind-completed: "yes"
|
||||
pv.kubernetes.io/bound-by-controller: "yes"
|
||||
volume.beta.kubernetes.io/storage-provisioner: cephfs.csi.ceph.com
|
||||
creationTimestamp: "2020-01-17T07:55:11Z"
|
||||
finalizers:
|
||||
- kubernetes.io/pvc-protection
|
||||
name: csi-cephfs-pvc
|
||||
namespace: default
|
||||
resourceVersion: "6902"
|
||||
selfLink: /api/v1/namespaces/default/persistentvolumeclaims/csi-cephfs-pvc
|
||||
uid: b84d07c9-ea67-40b4-96b9-4a79669b1ccc
|
||||
spec:
|
||||
accessModes:
|
||||
- ReadWriteMany
|
||||
resources:
|
||||
requests:
|
||||
storage: 10Gi
|
||||
storageClassName: csi-cephfs-sc
|
||||
volumeMode: Filesystem
|
||||
volumeName: pvc-b84d07c9-ea67-40b4-96b9-4a79669b1ccc
|
||||
status:
|
||||
accessModes:
|
||||
- ReadWriteMany
|
||||
capacity:
|
||||
storage: 10Gi
|
||||
phase: Bound
|
||||
kind: List
|
||||
metadata:
|
||||
resourceVersion: ""
|
||||
selfLink: ""
|
||||
```
|
||||
|
||||
Now you can see the pvc status capacity storage is updated with request size
|
||||
|
||||
```bash
|
||||
[$]kubectl get pvc
|
||||
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
|
||||
csi-cephfs-pvc Bound pvc-b84d07c9-ea67-40b4-96b9-4a79669b1ccc 10Gi RWX csi-cephfs-sc 6m26s
|
||||
```
|
||||
|
||||
- Now let us check the directory size inside the pod where PVC is mounted
|
||||
|
||||
```bash
|
||||
[$]kubectl exec -it csi-cephfs-demo-pod sh
|
||||
# df -h /var/lib/www
|
||||
Filesystem Size Used Avail Use% Mounted on
|
||||
10.108.149.216:6789:/volumes/csi/csi-vol-b0a1bc79-38fe-11ea-adb6-1a2797ee96de 10G 0 10G 0% /var/lib/www
|
||||
```
|
||||
|
||||
now you can see the size of `/var/lib/www` is updated from 5G to 10G
|
||||
Loading…
Reference in New Issue
Block a user