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You’re supposed to do it in the storageclass, if you want volumes created in that storageclass to require labels by default https://longhorn.io/docs/1.7.2/nodes-and-volumes/nodes/storage-tags/#kubernetes

are you talking about this param:

<http://storageclass.kubernetes.io/is-default-class|storageclass.kubernetes.io/is-default-class>: "true"

what?

sorry, i got that part, my issues is more like this: a better prompt for the question thanks to someone in the #C01GKHKAG0K channel: is there a way to prevent Longhorn replicas from being added to a disk with a disk label unless there's a matching label

label everything, use the storageclass to set nodeSelector/diskSelector to put it where you want

my issue is that i have about 100 volumes, that are assigned to a sc that has no labels (in harvester). now i added a couple disks i only want a specific service on (database iops basically) so i spun up the disks, setup the sc and labels, but volumes that have no labels periodically get placed on those disks. does that make sense?

you should be able to label the existing disks and add a diskSelector to the storageclass

i'll check for some reason i didnt think you could

and then put different labels and create a new sc for the high iops disks

yeah, that's what i was finding. seems like you cant set node / disk selectors on already existing sc. i'll talk to harvester team to see if they have any thoughts on how to reorganize it w/o breaking things.