Avoid creating extraneous GCE controller instance groups
* Intended as part of #504 improvement * Single controller clusters only require one controller instance group (previously created zone-many) * Multi-controller clusters must "wrap" controllers over zonal heterogeneous instance groups. For example, 5 controllers over 3 zones (no change)
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@ -57,7 +57,7 @@ resource "google_compute_backend_service" "apiserver" {
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# Instance group of heterogeneous (unmanged) controller instances
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resource "google_compute_instance_group" "controllers" {
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count = length(local.zones)
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count = min(var.controller_count, length(local.zones))
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name = format("%s-controllers-%s", var.cluster_name, element(local.zones, count.index))
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zone = element(local.zones, count.index)
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