Volume Resizing work only when no Pod are running on it ?

[albundy83]

Hello,

Using latest version available (v1.2.0), I'd like to be sure that I can't expand a PVC while I have a Pod running on it.
If it's correct, is it something that could be implemented some days ?

Thanks for your help

[jerome-jutteau]

Hi @albundy83,

Underlying block device (BSU) is currently not able to be resized while in use (meaning attached to node). This is mainly a IaaS limitation for now.
Forcing block device detach on node would cause I/O errors in Pods, potential data loss and should break CSI state.

Lets keep this issue to keep track of your need once the API will support it.

[pierreozoux]

Hi,

I'd like to resize a pvc attached to a stateful set.
Do you have some kind of procedure to do so?
I detached the volume from outscale UI, but I think kubernetes is lost.
How could I reset the system?

Thanks for your help!

[ghost]

Hi @pierreozoux ,

In order that Kubernetes find its way back after detach volume with ui, please change the number of replicas of the stateful to 0 (the pvc will be not destroyed). Then set the statefulset replicas to its original values so that volumes will be managed and mount by the csi.

In order to to resize a pvc attached to a statefulset, you can follow this first answer here (https://serverfault.com/questions/955293/how-to-increase-disk-size-in-a-stateful-set)
Because Block device (BSU) is currently not able to be resized while in use (it meaning when node is attached), you have to set replicas to 0 before beginning and go back your original value of replicas before step 3 (kubectl apply -f ..).

[pierreozoux]

I could manage without deleting sts:

https://serverfault.com/a/1166255/192049