Modifying persistentstorageinstances

[jameshcorbett]

I created a persistentstorageinstance and noticed that I could change the size of it. Is that something that's supported? After nominally changing the size, the files I had created in it were still there, but I didn't verify that the file system capacity had actually changed.

I also noticed that I could change it from lustre to xfs and I'm not sure that should be supported. And in fact, when I went to go use the xfs persistent storage, it failed. But I haven't yet had a chance to verify that persistent xfs storage works in general.

[roehrich-hpe]

We need to make that resource immutable by adding a validation webhook for it.