df output is not matching with cephfs pvc size #3240
Description
If the cephFS PVC is created with a size, not in multiple of 4Mi, the df output is not matching the cephfs PVC size
3Mib PVC
[🎩︎]mrajanna@fedora cephfs $]kubectl get pvc
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
cephfs-pvc Bound pvc-f6cdefa3-3ea4-467b-af64-dec152f6bb9b 3Mi RWO rook-cephfs 2s
[🎩︎]mrajanna@fedora cephfs $]kubectl create -f pod.yaml
pod/csicephfs-demo-pod created
kubectl exec -it pod/csicephfs-demo-pod -- sh
# df -h
Filesystem Size Used Avail Use% Mounted on
overlay 28G 5.1G 22G 20% /
tmpfs 64M 0 64M 0% /dev
tmpfs 2.0G 0 2.0G 0% /sys/fs/cgroup
/dev/vda1 28G 5.1G 22G 20% /etc/hosts
shm 64M 0 64M 0% /dev/shm
10.97.50.161:6789:/volumes/csi/csi-vol-13447894-01a9-11ed-8ecf-e6f29e19d3ef/d3c7e241-0867-434a-9238-b4124c5edb42 31G 0 31G 0% /var/lib/www/html
tmpfs 3.9G 12K 3.9G 1% /run/secrets/kubernetes.io/serviceaccount
tmpfs 2.0G 0 2.0G 0% /proc/acpi
tmpfs 2.0G 0 2.0G 0% /proc/scsi
tmpfs 2.0G 0 2.0G 0% /sys/firmware
#
ceph fs subvolume info myfs csi-vol-13447894-01a9-11ed-8ecf-e6f29e19d3ef csi
{
"atime": "2022-07-12 06:08:40",
"bytes_pcent": "0.00",
"bytes_quota": 3145728,
"bytes_used": 0,
"created_at": "2022-07-12 06:08:40",
"ctime": "2022-07-12 06:08:40",
"data_pool": "myfs-replicated",
"features": [
"snapshot-clone",
"snapshot-autoprotect",
"snapshot-retention"
],
"gid": 0,
"mode": 16895,
"mon_addrs": [
"10.97.50.161:6789"
],
"mtime": "2022-07-12 06:08:40",
"path": "/volumes/csi/csi-vol-13447894-01a9-11ed-8ecf-e6f29e19d3ef/d3c7e241-0867-434a-9238-b4124c5edb42",
"pool_namespace": "",
"state": "complete",
"type": "subvolume",
"uid": 0
}
4Mib PVC
sh-4.4$ ceph fs subvolume info myfs csi-vol-2203acb6-01ae-11ed-8ecf-e6f29e19d3ef csi
{
"atime": "2022-07-12 06:44:52",
"bytes_pcent": "0.00",
"bytes_quota": 4194304,
"bytes_used": 0,
"created_at": "2022-07-12 06:44:52",
"ctime": "2022-07-12 06:44:52",
"data_pool": "myfs-replicated",
"features": [
"snapshot-clone",
"snapshot-autoprotect",
"snapshot-retention"
],
"gid": 0,
"mode": 16895,
"mon_addrs": [
"10.97.50.161:6789"
],
"mtime": "2022-07-12 06:44:52",
"path": "/volumes/csi/csi-vol-2203acb6-01ae-11ed-8ecf-e6f29e19d3ef/0224b892-adb3-4b47-b099-63c3fde33b0e",
"pool_namespace": "",
"state": "complete",
"type": "subvolume",
"uid": 0
}
[🎩︎]mrajanna@fedora cephfs $]kubectl execectl exec -it pod/csicephfs-demo-pod -- sh
# df -h
Filesystem Size Used Avail Use% Mounted on
overlay 28G 5.1G 22G 20% /
tmpfs 64M 0 64M 0% /dev
tmpfs 2.0G 0 2.0G 0% /sys/fs/cgroup
/dev/vda1 28G 5.1G 22G 20% /etc/hosts
shm 64M 0 64M 0% /dev/shm
10.97.50.161:6789:/volumes/csi/csi-vol-2203acb6-01ae-11ed-8ecf-e6f29e19d3ef/0224b892-adb3-4b47-b099-63c3fde33b0e 4.0M 0 4.0M 0% /var/lib/www/html
tmpfs 3.9G 12K 3.9G 1% /run/secrets/kubernetes.io/serviceaccount
tmpfs 2.0G 0 2.0G 0% /proc/acpi
tmpfs 2.0G 0 2.0G 0% /proc/scsi
tmpfs 2.0G 0 2.0G 0% /sys/firmware
#
5Mib PVC
[🎩︎]mrajanna@fedora cephfs $]kubectl get pvc
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
cephfs-pvc Bound pvc-440e605b-1f4e-4442-9100-32721309ffa0 5Mi RWO rook-cephfs 79s
[🎩︎]mrajanna@fedora cephfs $]
[🎩︎]mrajanna@fedora cephfs $]kubectl exec -it pod/csicephfs-demo-pod -- sh
# df -h
Filesystem Size Used Avail Use% Mounted on
overlay 28G 5.1G 22G 20% /
tmpfs 64M 0 64M 0% /dev
tmpfs 2.0G 0 2.0G 0% /sys/fs/cgroup
/dev/vda1 28G 5.1G 22G 20% /etc/hosts
shm 64M 0 64M 0% /dev/shm
10.97.50.161:6789:/volumes/csi/csi-vol-c923b795-01ae-11ed-8ecf-e6f29e19d3ef/6990d536-02f3-47fd-8c56-a915f0d487ec 4.0M 0 4.0M 0% /var/lib/www/html
tmpfs 3.9G 12K 3.9G 1% /run/secrets/kubernetes.io/serviceaccount
tmpfs 2.0G 0 2.0G 0% /proc/acpi
tmpfs 2.0G 0 2.0G 0% /proc/scsi
tmpfs 2.0G 0 2.0G 0% /sys/firmware
# exit
6Mib PVC
[🎩︎]mrajanna@fedora cephfs $]kubectl get pvc
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
cephfs-pvc Bound pvc-d48d36d7-580f-40e6-909f-d407c8e1c182 6Mi RWO rook-cephfs 35s
[🎩︎]mrajanna@fedora cephfs $]kubectl exec -it pod/csicephfs-demo-pod -- sh
# df -h
Filesystem Size Used Avail Use% Mounted on
overlay 28G 5.1G 22G 20% /
tmpfs 64M 0 64M 0% /dev
tmpfs 2.0G 0 2.0G 0% /sys/fs/cgroup
/dev/vda1 28G 5.1G 22G 20% /etc/hosts
shm 64M 0 64M 0% /dev/shm
10.97.50.161:6789:/volumes/csi/csi-vol-c923b795-01ae-11ed-8ecf-e6f29e19d3ef/6990d536-02f3-47fd-8c56-a915f0d487ec 4.0M 0 4.0M 0% /var/lib/www/html
tmpfs 3.9G 12K 3.9G 1% /run/secrets/kubernetes.io/serviceaccount
tmpfs 2.0G 0 2.0G 0% /proc/acpi
tmpfs 2.0G 0 2.0G 0% /proc/scsi
tmpfs 2.0G 0 2.0G 0% /sys/firmware
# exit
8Mib PVC
[🎩︎]mrajanna@fedora cephfs $]kubectl get pvc
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
cephfs-pvc Bound pvc-87b11bf4-5b0c-4916-ae75-0664fc4ec2ca 8Mi RWO rook-cephfs 9s
[🎩︎]mrajanna@fedora cephfs $]kub^C
[🎩︎]mrajanna@fedora cephfs $]kubectl execectl exec -it pod/csicephfs-demo-pod -- sh
# df -h
Filesystem Size Used Avail Use% Mounted on
overlay 28G 5.1G 22G 20% /
tmpfs 64M 0 64M 0% /dev
tmpfs 2.0G 0 2.0G 0% /sys/fs/cgroup
/dev/vda1 28G 5.1G 22G 20% /etc/hosts
shm 64M 0 64M 0% /dev/shm
10.97.50.161:6789:/volumes/csi/csi-vol-f4f035b0-01ae-11ed-8ecf-e6f29e19d3ef/02268cb8-2c7c-46cd-9ea7-6d98f065b4d5 8.0M 0 8.0M 0% /var/lib/www/html
tmpfs 3.9G 12K 3.9G 1% /run/secrets/kubernetes.io/serviceaccount
tmpfs 2.0G 0 2.0G 0% /proc/acpi
tmpfs 2.0G 0 2.0G 0% /proc/scsi
tmpfs 2.0G 0 2.0G 0% /sys/firmware
#