Added terraform definitions for known resources.

- Apparently Azure stuff is all-too-fragile and I had to create both
Cosmos DB and PostgreSQL twice.
- See: hashicorp/terraform-provider-azurerm#3813

infra/bus-topic.tf

@@ -0,0 +1,7 @@
+resource "azurerm_servicebus_topic" "chat-app" {
+  name                = "chat-app-coordination-topic"
+  resource_group_name = "${azurerm_resource_group.chat-app.name}"
+  namespace_name      = "${azurerm_servicebus_namespace.chat-app.name}"
+
+  enable_partitioning = true
+}

infra/cosmos-db.tf

@@ -0,0 +1,21 @@
+resource "azurerm_cosmosdb_account" "messages-db" {
+  name                = "chat-app-account"
+  location            = "${azurerm_resource_group.chat-app.location}"
+  resource_group_name = "${azurerm_resource_group.chat-app.name}"
+  offer_type          = "Standard"
+  kind                = "GlobalDocumentDB"
+
+  enable_automatic_failover = false 
+
+  consistency_policy {
+    consistency_level       = "BoundedStaleness"
+    max_interval_in_seconds = 10
+    max_staleness_prefix    = 200
+  }
+
+  geo_location {
+    prefix            = "chat-app-account"
+    location          = "${azurerm_resource_group.chat-app.location}"
+    failover_priority = 0
+  }
+}

infra/namespace.tf

@@ -0,0 +1,10 @@
+resource "azurerm_servicebus_namespace" "chat-app" {
+  name                = "chat-app-namespace"
+  location            = "${azurerm_resource_group.chat-app.location}"
+  resource_group_name = "${azurerm_resource_group.chat-app.name}"
+  sku                 = "Standard"
+
+  tags = {
+    source = "terraform"
+  }
+}

infra/network.tf

@@ -0,0 +1,6 @@
+resource "azurerm_virtual_network" "chat-app" {
+  name                = "chat-app-network"
+  resource_group_name = "${azurerm_resource_group.chat-app.name}"
+  location            = "${azurerm_resource_group.chat-app.location}"
+  address_space       = ["10.0.0.0/16"]
+}

infra/provider.tf

@@ -0,0 +1,3 @@
+provider "azurerm" {
+  version = "1.33.0"
+}

infra/resources.tf

@@ -0,0 +1,4 @@
+resource "azurerm_resource_group" "chat-app" {
+  name     = "chat-app"
+  location = "North Europe"
+}

infra/service-fabric.tf

@@ -0,0 +1,17 @@
+resource "azurerm_service_fabric_cluster" "chat-app" {
+  name                 = "chat-app-cluster"
+  resource_group_name  = "${azurerm_resource_group.chat-app.name}"
+  location             = "${azurerm_resource_group.chat-app.location}"
+  reliability_level    = "Bronze"
+  upgrade_mode         = "Automatic"
+  vm_image             = "Linux"
+  management_endpoint  = "https://chat-app.cloudapp.net:19080"
+
+  node_type {
+    name                 = "chats"
+    instance_count       = 3 
+    is_primary           = true
+    client_endpoint_port = 2020
+    http_endpoint_port   = 80
+  }
+}

infra/sql-storage.tf

@@ -0,0 +1,23 @@
+resource "azurerm_postgresql_server" "chat-app" {
+  name                = "postgresql-server-1"
+  location            = "${azurerm_resource_group.chat-app.location}"
+  resource_group_name = "${azurerm_resource_group.chat-app.name}"
+
+  sku {
+    name     = "B_Gen5_2"
+    capacity = 2
+    tier     = "Basic"
+    family   = "Gen5"
+  }
+
+  storage_profile {
+    storage_mb            = 5120
+    backup_retention_days = 7
+    geo_redundant_backup  = "Disabled"
+  }
+
+  administrator_login          = "psqladmin"
+  administrator_login_password = "T0o$ecret7oo$ecure7oo4urious"
+  version                      = "10"
+  ssl_enforcement              = "Enabled"
+}