From 4609839225ce0fd8c9f3ea573c290592b7dbbd43 Mon Sep 17 00:00:00 2001
From: Rafael White <rwhite@mctekk.com>
Date: Wed, 21 Feb 2024 15:32:56 -0400
Subject: [PATCH] Update min_size and desired_size for eks_managed_node_groups

---
 README.md        | 59 ++++++++++++++++++++++++++++++++++++++++++++++++
 terraform/eks.tf |  4 ++--
 2 files changed, 61 insertions(+), 2 deletions(-)
 create mode 100644 README.md

diff --git a/README.md b/README.md
new file mode 100644
index 0000000..485bc32
--- /dev/null
+++ b/README.md
@@ -0,0 +1,59 @@
+# AWS EKS Cluster IaC
+
+Deploy a AWS EKS Cluster using Terraform in minutes.
+
+## Setup
+
+### Set you AWS account credentials on Github Repo
+
+1.On your Github Repo `Settings`, in `Action` under `Secrets and variables` create two new `Repository Secrets` and their corresponding values:
+
+* `AWS_ACCESS_KEY_ID`: AWS Account Access Key
+
+* `AWS_SECRET_ACCESS_KEY`: AWS Account Secret Key
+
+## Set you tf states bucket
+
+1. On AWS create a new bucket where the terraform states will be stored.
+
+2. Change the name of the bucket in the backend s3 configuration on the `provider.tf` file. On `bucket` replace the existing value with your own bucket name.
+
+### Setting tfvars as Github Secrets
+
+Instead of using a `.tfvars` for storing the different variable values, Github environments secrets are used.The following steps cover how to do it:
+
+1. On your Github Repo `Settings`, in `Action` under `Secrets and variables` create a new environment. For example: `development`
+
+2. Create the following secrets and add the corresponding types of values for each one. These are the ones set for this project:
+
+    * `AWS_REGION`: ex: us-east-1
+    * `EKS_CLUSTER_EC2_INSTANCE_TYPE`: ex: m3.large
+    * `EKS_VPC_SECURITY_GROUP_ID`: ex: sg-062f05b98b1edfefaeasdadaedaed
+    * `NODE_GROUP_AUTOSCALING_POLICY_ARN`: ex: arn:aws:iam::23428842523567:policy/NameOFTHEPOLICY
+    * `EKS_CLUSTER_NAME`: ex: example-cluster
+    * `VPC_CIDR_BLOCK`: ex: 10.1.0.0/16
+    * `VPC_ID`: ex: vpc-232fsr9fs9229frf
+    * `VPC_PRIVATE_SUBNETS_1`: ex: subnet-22938423489239"
+    * `VPC_PRIVATE_SUBNETS_2`: ex: subnet-22938423489224"
+
+## How to Deploy
+
+To deploy a new cluster with the given values just go to the `Actions` section of you repository and click on the `Deploy/update infrastructure`. There, go the `Run workflow` button and choose the environment you wish to deploy. The deployment will begin. It should take about 10 minutes for the cluster to be deployed on AWS EKS.
+
+
+## Installing the cluster autoscaler
+
+For now the installation must be done after the cluster is created via helm using the following commands:
+
+Add the repo:
+```sh
+helm repo add autoscaler https://kubernetes.github.io/autoscaler
+```
+
+Install the chart on the cluster:
+
+```sh
+helm install my-release autoscaler/cluster-autoscaler \
+    --set autoDiscovery.clusterName=<CLUSTER NAME> \
+    --set awsRegion=<YOUR AWS REGION>
+```
\ No newline at end of file
diff --git a/terraform/eks.tf b/terraform/eks.tf
index 8d43bff..fab5801 100644
--- a/terraform/eks.tf
+++ b/terraform/eks.tf
@@ -24,9 +24,9 @@ module "eks" {
 
   eks_managed_node_groups = {
     general = {
-      min_size     = 2
+      min_size     = 1
       max_size     = 10
-      desired_size = 2
+      desired_size = 1
 
       instance_types       = ["${var.eks_cluster_ec2_instance_type}"]
       capacity_type        = "ON_DEMAND"