fix: use null_resource vs local_file for id_rsa (#40)

Author: mikeruu

iac/cloud/openstack/lib/openstack-keypair/main.tf

@@ -2,14 +2,17 @@ resource "openstack_compute_keypair_v2" "ssh_keypair" {
   name = replace(format("%skey", var.naming_prefix), ".", "-")
 }
 
-resource "local_file" "private_key" {
-  content         = openstack_compute_keypair_v2.ssh_keypair.private_key
-  filename        = "${path.root}/id_rsa"
-  file_permission = "0600"
-}
+resource "null_resource" "save_ssh_keys" {
+  triggers = {
+    key_id = openstack_compute_keypair_v2.ssh_keypair.id
+  }
 
-resource "local_file" "public_key" {
-  content         = openstack_compute_keypair_v2.ssh_keypair.public_key
-  filename        = "${path.root}/id_rsa.pub"
-  file_permission = "0644"
-}
+  provisioner "local-exec" {
+    command = <<-EOT
+      echo '${openstack_compute_keypair_v2.ssh_keypair.private_key}' > ${path.root}/id_rsa
+      chmod 600 ${path.root}/id_rsa
+      echo '${openstack_compute_keypair_v2.ssh_keypair.public_key}' > ${path.root}/id_rsa.pub
+      chmod 644 ${path.root}/id_rsa.pub
+    EOT
+  }
+}