Sync fedora-cloud modules with Container Linux

* Update manifests for Kubernetes v1.10.0
* Update etcd from v3.3.2 to v3.3.3
* Add disk_type optional variable on AWS
* Remove redundant kubeconfig copy on AWS
* Distribute etcd secres only to controllers
* Organize module variables and ssh steps

aws/fedora-cloud/kubernetes/workers/ami.tf

@@ -14,6 +14,6 @@ data "aws_ami" "fedora" {
 
   filter {
     name   = "name"
-    values = ["Fedora-Cloud-Base-27*-standard-0"]
+    values = ["Fedora-Cloud-Base-27*-gp2-0"]
   }
 }

aws/fedora-cloud/kubernetes/workers/cloudinit/worker.yaml.tmpl

@@ -7,9 +7,8 @@ yum_repos:
     gpgcheck: true
     gpgkey: https://packages.cloud.google.com/yum/doc/yum-key.gpg https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
 packages:
-  - vim
-  - docker
-  - kubelet
+  - [docker, 1.13.1]
+  - [kubelet, 1.10.0]
   - nfs-utils
 write_files:
   - path: /etc/systemd/system/kubelet.service.d/10-typhoon.conf

aws/fedora-cloud/kubernetes/workers/variables.tf

@@ -1,21 +1,23 @@
 variable "name" {
   type        = "string"
-  description = "Unique name instance group"
+  description = "Unique name for the worker pool"
 }
 
+# AWS
+
 variable "vpc_id" {
   type        = "string"
-  description = "ID of the VPC for creating instances"
+  description = "Must be set to `vpc_id` output by cluster"
 }
 
 variable "subnet_ids" {
   type        = "list"
-  description = "List of subnet IDs for creating instances"
+  description = "Must be set to `subnet_ids` output by cluster"
 }
 
 variable "security_groups" {
   type        = "list"
-  description = "List of security group IDs"
+  description = "Must be set to `worker_security_groups` output by cluster"
 }
 
 # instances
@@ -35,19 +37,25 @@ variable "instance_type" {
 variable "disk_size" {
   type        = "string"
   default     = "40"
-  description = "Size of the disk in GB"
+  description = "Size of the EBS volume in GB"
+}
+
+variable "disk_type" {
+  type        = "string"
+  default     = "gp2"
+  description = "Type of the EBS volume (e.g. standard, gp2, io1)"
 }
 
 # configuration
 
 variable "kubeconfig" {
   type        = "string"
-  description = "Generated Kubelet kubeconfig"
+  description = "Must be set to `kubeconfig` output by cluster"
 }
 
 variable "ssh_authorized_key" {
   type        = "string"
-  description = "SSH public key for user 'core'"
+  description = "SSH public key for user 'fedora'"
 }
 
 variable "service_cidr" {

aws/fedora-cloud/kubernetes/workers/workers.tf

@@ -42,7 +42,7 @@ resource "aws_launch_configuration" "worker" {
 
   # storage
   root_block_device {
-    volume_type = "standard"
+    volume_type = "${var.disk_type}"
     volume_size = "${var.disk_size}"
   }