simplified eks infra config

infra/eks/_providers.tf

@@ -3,15 +3,15 @@ provider "aws" {
   # Optionally pick credentials/profile via CLI flags or ENV vars
 }
 
-provider "kubernetes" {
-  host                   = module.eks.cluster_endpoint
-  cluster_ca_certificate = base64decode(module.eks.cluster_certificate_authority_data)
-  exec {
-    api_version = "client.authentication.k8s.io/v1beta1"
-    command     = "aws"
-    args        = ["eks", "get-token", "--cluster-name", module.eks.cluster_name]
-  }
-}
+# provider "kubernetes" {
+#   host                   = module.eks.cluster_endpoint
+#   cluster_ca_certificate = base64decode(module.eks.cluster_certificate_authority_data)
+#   exec {
+#     api_version = "client.authentication.k8s.io/v1beta1"
+#     command     = "aws"
+#     args        = ["eks", "get-token", "--cluster-name", module.eks.cluster_name]
+#   }
+# }
 
 # resource "kubernetes_namespace" "node-app" {
 #   metadata { name = "node-api" }

infra/eks/_variables.tf

@@ -24,7 +24,7 @@ variable "alb_public_subnet_ids" {
 
 variable "instance_type" {
   type    = string
-  default = "t3.small"
+  default = "t3a.small"
 }
 
 # variable "desired_capacity" {

infra/eks/cluster.tf

@@ -3,14 +3,14 @@ module "eks" {
   version = "~> 20.0"
 
   cluster_name    = "${var.environment}-eks"
-  cluster_version = "1.30"
+  cluster_version = "1.31"
 
   vpc_id     = var.vpc_id
   subnet_ids = var.app_public_subnet_ids
 
-  cluster_endpoint_private_access      = true
-  cluster_endpoint_public_access       = true
-  cluster_endpoint_public_access_cidrs = ["119.15.74.49/32"]
+  cluster_endpoint_private_access = true
+  cluster_endpoint_public_access  = true
+  # cluster_endpoint_public_access_cidrs = ["119.15.74.49/32"]
 
   enable_cluster_creator_admin_permissions = true
 

k8s/deployment.yaml

@@ -4,29 +4,31 @@ metadata:
   name: demo-node-app
 spec:
   replicas: 1
-  selector:
-    matchLabels:
-      app: demo-node-app
-  template:
-    metadata:
+  selector: # Selector is used to find which Pods are part of this Deployment.
+    matchLabels: # A simple key/value filter: any Pod whose labels include all listed pairs is part of the set.
+      app: demo-node-app # Needs to match the label in the pod template
+  template: # Template is used to create Pods.
+    metadata: # Metadata is used to set labels and annotations on the Pods.
       labels:
         app: demo-node-app
-    spec:
-      containers:
-      - name: demo-node-app
+    spec: # Spec is used to define the containers that will run in the Pods.
+      containers: # An array of container definitions. A Pod can run one or many containers that share the same network namespace and volumes.
+      - name: demo-node-app # A unique identifier within this Pod for the container. Used in logs, metrics, and when referencing the container in probes or kubectl exec -c demo-node-app
         image: nrampling/demo-node-app:1.0.3
         ports:
         - containerPort: 3000
-# ---
-# apiVersion: v1
-# kind: Service
-# metadata:
-#   name: demo-node-app-svc
-# spec:
-#   selector:
-#     app: demo-node-app
-#   ports:
-#     - protocol: TCP
-#       port: 3000
-#       targetPort: 3000
-#   type: NodePort
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: demo-node-app-svc
+  labels:
+    app: demo-node-app
+spec:
+  type: ClusterIP
+  selector:
+    app: demo-node-app
+  ports:
+  - port: 3000
+    targetPort: 3000
+    protocol: TCP