infra: add load testing deployment configs for terraform

infra/.gitignore

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+*.tfstate*
+.terraform

infra/load-testing/azure.tf

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+provider "azurerm" {
+  subscription_id = "${var.subscription_id}"
+  client_id       = "${var.client_id}"
+  client_secret   = "${var.client_secret}"
+  tenant_id       = "${var.tenant_id}"
+}
+
+resource "random_id" "namer" {
+  keepers = {
+    resource_group    = "res"
+    container_service = "cs"
+    dns_prefix        = "k8s"
+  }
+
+  byte_length = 8
+}
+
+variable "username" {
+  type = "string"
+  default = "amis"
+}
+
+resource "azurerm_resource_group" "test" {
+  name     = "istanbul-test-${random_id.namer.hex}"
+  location = "Southeast Asia"
+}
+
+resource "azurerm_container_service" "test" {
+  name                   = "istanbul-test-${random_id.namer.hex}"
+  location               = "${azurerm_resource_group.test.location}"
+  resource_group_name    = "${azurerm_resource_group.test.name}"
+  orchestration_platform = "Kubernetes"
+
+  master_profile {
+    count      = 1
+    dns_prefix = "istanbul-${random_id.namer.hex}"
+  }
+
+  linux_profile {
+    admin_username = "${var.username}"
+
+    ssh_key {
+      key_data = "${file("~/.ssh/id_rsa.pub")}"
+    }
+  }
+
+  agent_pool_profile {
+    name       = "default"
+    count      = "${length(var.svcs)}"
+    dns_prefix = "agent-${random_id.namer.hex}"
+    vm_size    = "Standard_DS2_v2"
+  }
+
+  service_principal {
+    client_id     = "${var.client_id}"
+    client_secret = "${var.client_secret}"
+  }
+
+  diagnostics_profile {
+    enabled = false
+  }
+
+  tags {
+    Environment = "Testing"
+  }
+}
+
+resource "null_resource" "kubeconfig" {
+  provisioner "local-exec" {
+    command = "sleep 10 && scp -o StrictHostKeyChecking=no ${var.username}@istanbul-${random_id.namer.hex}.${azurerm_resource_group.test.location}.cloudapp.azure.com:~/.kube/config ~/.kube/config"
+    interpreter = ["bash", "-c"]
+  }
+  depends_on = ["azurerm_container_service.test"]
+}

infra/load-testing/kubernetes.tf

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+resource "kubernetes_service" "validator-svc" {
+  metadata {
+    name = "validator-svc-${count.index}"
+  }
+
+  spec {
+    selector {
+      app = "validator-${count.index}"
+    }
+    type = "LoadBalancer"
+    port {
+      port = 8546
+      target_port = 8546
+    }
+
+    type = "LoadBalancer"
+  }
+
+  count = "${length(var.svcs)}"
+}

infra/load-testing/variables.tf

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+variable "count" {
+  default = 4
+}
+
+variable "svcs" {
+  default = [0, 1, 2, 3]
+}
+
+variable "subscription_id" {}
+variable "client_id" {}
+variable "client_secret" {}
+variable "tenant_id" {}