Added Terraform variables for SSH user which depends on given AWS AMI

contrib/terraform/aws/terraform.tfvars.example

@@ -1,19 +1,21 @@
 #Global Vars
 aws_cluster_name = "devtest"
 
+
 #VPC Vars
 aws_vpc_cidr_block = "10.250.192.0/18"
 aws_cidr_subnets_private = ["10.250.192.0/20","10.250.208.0/20"]
 aws_cidr_subnets_public = ["10.250.224.0/20","10.250.240.0/20"]
 aws_avail_zones = ["eu-central-1a","eu-central-1b"]
 
+
 #Bastion Host
 aws_bastion_ami = "ami-5900cc36"
 aws_bastion_size = "t2.small"
+aws_bastion_ssh_user = "admin"
 
 
 #Kubernetes Cluster
-
 aws_kube_master_num = 3
 aws_kube_master_size = "t2.medium"
 
@@ -23,10 +25,13 @@ aws_etcd_size = "t2.medium"
 aws_kube_worker_num = 4
 aws_kube_worker_size = "t2.medium"
 
+# Refer to: https://coreos.com/os/docs/latest/booting-on-ec2.html
 aws_cluster_ami = "ami-903df7ff"
+aws_cluster_ssh_user = "core"
+
+
 
 #Settings AWS ELB
-
-aws_elb_api_port = 6443
-k8s_secure_api_port = 6443
+aws_elb_api_port = 443
+k8s_secure_api_port = 443
 kube_insecure_apiserver_address = 0.0.0.0