updates doc

README.md

@@ -30,37 +30,50 @@ Clusters
 
 To ensure all your regions have standardized deployments, in your Terraform variables (`TF_VAR_varname` or in `terraform.tfvars`), ensure that you have set `count` (number of nodes per cluster), `plan_primary`, and `plan_node`. This will apply to **all** clusters managed by this project. 
 
-Using the `Makefile`, you can quickly add a new cluster definition using:
 
-```bash
-make facility="ewr1" cluster_id="control" define-cluster
-```
+To add new clusters to a cluster pool, add the new facility to the `facilities` map:
 
-and then apply your new cluster module (if you do not wish to apply any other outstanding state changes via `terraform apply`):
+```
+variable "facilities" {
+  type = "map"
+
+  default = {
+    newark  = "ewr1"
+    narita  = "nrt1"
+    sanjose = "sjc1"
+  }
+}
+```
 
+by adding a line such as:
 ```
-make cluster_name="cluster_control_ewr1" apply-cluster
+...
+	chicago = "ord1"
+   }
+}
 ```
-where `cluster_name` is the module name for that cluster in `3-cluster-inventory.tf`, if you wish to review this manually before applying. This will follow the format `cluster_$cluster-id_$facility`. 
 
-<h3>Manually defining a Cluster</h3>
+<h3>Manually defining a Cluster, or adding a new cluster pool</h3>
 
 To create a cluster manually, in `3-cluster-inventory.tf` (this is ignored by git--your initial cluster setup is in `2-clusters.tf`, and is tracked), instantiate a new `cluster_pool` module:
 
 ```
-module "cluster_name_nrt1" {
-  source = "modules/cluster_pool"
+module "manual_cluster" {
+  source = "./modules/cluster_pool"
 
-  cluster_name         = "your_cluster_name"
-  count                = "${var.count}"
+  cluster_name         = "manual_cluster"
+  node_count           = "${var.node_count}"
   plan_primary         = "${var.plan_primary}"
   plan_node            = "${var.plan_node}"
-  facility             = "nrt1"
+  facilities           = "${var.facilities}"
+  primary_facility     = "${var.primary_facility}"
   auth_token           = "${var.auth_token}"
   project_id           = "${var.project_id}"
+  ssh_private_key_path = "${var.ssh_private_key_path}"
+  anycast_ip           = "${packet_reserved_ip_block.anycast_ip.address}"
 }
 ```
-This creates a single-controller cluster, with `count` number of agent nodes in `facility`.
+This creates a single-controller cluster, with `count` number of agent nodes for each `facility` in the `facilities` map.
 
 <h3>Demo Project</h3>