Pulumi does not properly recognize that the

spec.controller

field of an

IngressClass

is immutable so the resource needs to be recreated. Not sure by which mechanism Pulumi does that, but should I create a ticket for this?

it's handled here, yes a ticket would be great! https://github.com/pulumi/pulumi-kubernetes/blob/master/provider/pkg/provider/diff.go

https://github.com/pulumi/pulumi/issues/8100 Thanks Lee!