Turn off Private DNS zones and Private DNS resolver Fails

[christianGoe]

I Tried to turn off Private DNS as described https://azure.github.io/Azure-Landing-Zones/accelerator/startermodules/terraform-platform-landing-zone/options/dns/
the integration pipeline failed with error
│ Error: Attempt to get attribute from null value
│
│ on modules/hub-and-spoke-vnet/locals.dns.tf line 13, in locals:
│ 13: }, value.private_dns_zones) if local.private_dns_zones_enabled[key] && value.private_dns_zones.auto_registration_zone_enabled }
│ ├────────────────
│ │ value.private_dns_zones is null
│
│ This value is null, so it does not have any attributes.

as workaround i changed the block private_dns_zones_auto_registration in modules/hub-and-spoke-vnet/locals.dns.tf to

private_dns_zones_auto_registration = { for key, value in var.hub_virtual_networks : key =>
merge({
location = value.hub_virtual_network.location
vnet_resource_id = module.hub_and_spoke_vnet.virtual_networks[key].id
},
value.private_dns_zones != null ? value.private_dns_zones : {}) if local.private_dns_zones_enabled[key] && value.private_dns_zones != null && try(value.private_dns_zones.auto_registration_zone_enabled, false)
}

[jaredfholgate]

Thanks for reporting. Will be fixed in this PR shortly: Azure/alz-terraform-accelerator#209

[jaredfholgate]

Released in v4.6.2 of the starter module