Add autoreplace and autoexpand property for zpool

[vk-en]

Add autoreplace and autoexpand property for zpool.

Those settings will help us avoid additional commands being run by humans when performing storage expansion/replacement operations.

[zedi-pramodh]

@eriknordmark the auto expand helps in automatically expansing pool size when the existing disks are replaced with bigger size disks, it basically avoids a non-technician to run an additional command on the system, even if using zedcloud we can avoid an additional step.

auto replace helps replacing a failed disk if there is a spare disk on the device.

In both cases we can avoid user running an additional command.

Sure let's discuss in Storage meetings next week.

[eriknordmark]

@eriknordmark the auto expand helps in automatically expansing pool size when the existing disks are replaced with bigger size disks, it basically avoids a non-technician to run an additional command on the system, even if using zedcloud we can avoid an additional step.

I suspect we will end up capturing something about the number of drives and possibly their size in the hardware model for the device so that the user can track the intented hardware configuration(s) across their fleet. So there will be some steps in the workflow to replace drives.

For auto-replace it seems like we first need to decide whether we are going to introduce some workflow where drives are setup as spares (using the EVE API), so that they can be used automatically. But before we set some options lets first write down and agree on those workflows when it comes to drive additions and replacements.

[rouming]

@eriknordmark could you please close this with the "stalled" label?

[eriknordmark]

Closing as stalled