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Update vm-instance instructions to handle the case that there are zero instances #1413

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Jun 6, 2023
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Update vm-instance instructions to handle the case that there are zero instances #1413

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18 changes: 12 additions & 6 deletions modules/compute/vm-instance/outputs.tf
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Original file line number Diff line number Diff line change
Expand Up @@ -29,12 +29,18 @@ output "internal_ip" {
value = google_compute_instance.compute_vm[*].network_interface[0].network_ip
}

locals {
no_instance_instructions = "No instances were created."
first_instance_name = try(google_compute_instance.compute_vm[0].name, "no-instance")
ssh_instructions = <<-EOT
Use the following commands to SSH into the first VM created:
gcloud compute ssh --zone ${var.zone} ${local.first_instance_name} --project ${var.project_id}
If not accessible from the public internet, use an SSH tunnel through IAP:
gcloud compute ssh --zone ${var.zone} ${local.first_instance_name} --project ${var.project_id} --tunnel-through-iap
EOT
}

output "instructions" {
description = "Instructions on how to SSH into the created VM. Commands may fail depending on VM configuration and IAM permissions."
value = <<-EOT
Use the following commands to SSH into the first VM created:
gcloud compute ssh --zone ${var.zone} ${google_compute_instance.compute_vm[0].name} --project ${var.project_id}
If not accessible from the public internet, use an SSH tunnel through IAP:
gcloud compute ssh --zone ${var.zone} ${google_compute_instance.compute_vm[0].name} --project ${var.project_id} --tunnel-through-iap
EOT
value = var.instance_count > 0 ? local.ssh_instructions : local.no_instance_instructions
}