Merge pull request #46 from bti360/configurable-workstation-cidr

Configurable workstation cidr

Author: brandonjbjelland

README.md

@@ -106,6 +106,7 @@ MIT Licensed. See [LICENSE](https://github.com/terraform-aws-modules/terraform-a
 | worker_security_group_id    | If provided, all workers will be attached to this security group. If not given, a security group will be created with necessary ingres/egress to work with the EKS cluster.                                              | string | `` | no  |
 | worker_sg_ingress_from_port | Minimum port number from which pods will accept communication. Must be changed to a lower value if some pods in your cluster will expose a port lower than 1025 (e.g. 22, 80, or 443).                                   | string |  `1025`  |    no    |
 | workers_group_defaults      | Default values for target groups as defined by the list of maps.                                                                                                                                                         |  map   | `<map>`  |    no    |
+| workstation_cidr            | Override the default ingress rule that allows communication with the EKS cluster API. If not given, will use current IP/32.                                                                                              | string |    -     |    no    |
 
 ## Outputs
 

cluster.tf

@@ -45,7 +45,7 @@ resource "aws_security_group_rule" "cluster_https_worker_ingress" {
 }
 
 resource "aws_security_group_rule" "cluster_https_cidr_ingress" {
-  cidr_blocks       = ["${local.workstation_external_cidr}"]
+  cidr_blocks       = ["${local.workstation_cidr}"]
   description       = "Allow kubectl communication with the EKS cluster API."
   protocol          = "tcp"
   security_group_id = "${aws_security_group.cluster.id}"

local.tf

@@ -3,6 +3,7 @@ locals {
   cluster_security_group_id = "${var.cluster_security_group_id == "" ? aws_security_group.cluster.id : var.cluster_security_group_id}"
   worker_security_group_id  = "${var.worker_security_group_id == "" ? aws_security_group.workers.id : var.worker_security_group_id}"
   workstation_external_cidr = "${chomp(data.http.workstation_external_ip.body)}/32"
+  workstation_cidr          = "${coalesce(var.workstation_cidr, local.workstation_external_cidr)}"
 
   # Mapping from the node type that we selected and the max number of pods that it can run
   # Taken from https://amazon-eks.s3-us-west-2.amazonaws.com/1.10.3/2018-06-05/amazon-eks-nodegroup.yaml

variables.tf

@@ -7,6 +7,11 @@ variable "cluster_security_group_id" {
   default     = ""
 }
 
+variable "workstation_cidr" {
+  description = "Override the default ingress rule that allows communication with the EKS cluster API. If not given, will use current IP/32.    "
+  default     = ""
+}
+
 variable "cluster_version" {
   description = "Kubernetes version to use for the EKS cluster."
   default     = "1.10"