Add ability to load balance TCP/UDP applications on Azure

* Add ability to load balance TCP/UDP applications (e.g. NodePort)
* Output the load balancer ID as `loadbalancer_id`
* Output `worker_security_group_name` and `worker_address_prefix`
for extending firewall rules

CHANGES.md

@@ -6,7 +6,7 @@ Notable changes between versions.
 
 * Kubernetes [v1.14.0](https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG-1.14.md#v1140)
 * Update Calico from v3.6.0 to v3.6.1
-* Add `enable_aggregation` option for CNCF conformance
+* Add `enable_aggregation` option for CNCF conformance ([#436](https://github.com/poseidon/typhoon/pull/436))
   * Aggregation is disabled by default to retain our security stance
   * Aggregation increases the security surface area. Extensions become part of the control plane and must be scrutinized carefully and trusted. Favor leaving aggregation disabled.
 
@@ -16,10 +16,16 @@ Notable changes between versions.
   * Output the network load balancer ARN as `nlb_id`
   * Accept a `worker_target_groups` (ARN) list to which worker instances should be added
 
+#### Azure
+
+* Add ability to load balance TCP/UDP applications ([#447](https://github.com/poseidon/typhoon/pull/447))
+  * Output the load balancer ID as `loadbalancer_id`
+* Output `worker_security_group_name` and `worker_address_prefix` for extending firewall rules ([#447](https://github.com/poseidon/typhoon/pull/447))
+
 #### DigitalOcean
 
-* Harden internal (node-to-node) firewall rules to align with other platforms
+* Harden internal (node-to-node) firewall rules to align with other platforms ([#444](https://github.com/poseidon/typhoon/pull/444))
-* Output `controller_tag` and `worker_tag` to simplify custom firewall rule creation
+* Output `controller_tag` and `worker_tag` to simplify extending firewall rules ([#444](https://github.com/poseidon/typhoon/pull/444))
 
 #### Google Cloud
 

azure/container-linux/kubernetes/outputs.tf

@@ -27,10 +27,29 @@ output "security_group_id" {
   value = "${azurerm_network_security_group.worker.id}"
 }
 
-output "backend_address_pool_id" {
-  value = "${azurerm_lb_backend_address_pool.worker.id}"
-}
-
 output "kubeconfig" {
   value = "${module.bootkube.kubeconfig-kubelet}"
 }
+
+# Outputs for custom firewalling
+
+output "worker_security_group_name" {
+  value = "${azurerm_network_security_group.worker.name}"
+}
+
+output "worker_address_prefix" {
+  description = "Worker network subnet CIDR address (for source/destination)"
+  value       = "${azurerm_subnet.worker.address_prefix}"
+}
+
+# Outputs for custom load balancing
+
+output "loadbalancer_id" {
+  description = "ID of the cluster load balancer"
+  value       = "${azurerm_lb.cluster.id}"
+}
+
+output "backend_address_pool_id" {
+  description = "ID of the worker backend address pool"
+  value       = "${azurerm_lb_backend_address_pool.worker.id}"
+}