feat: Update Karpenter pattern to use v0.32.1 with v1beta1 APIs

aws-ia · Nov 1, 2023 · 82c5e45 · 82c5e45
1 parent 390af12
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diff --git a/patterns/karpenter/README.md b/patterns/karpenter/README.md
@@ -8,15 +8,55 @@ See [here](https://aws-ia.github.io/terraform-aws-eks-blueprints/getting-started
 
 ## Validate
 
-!!! danger "TODO"
-    Add in validation steps
+1. Test by listing the nodes in the cluster. You should see four Fargate nodes in the cluster:
+
+    ```sh
+    kubectl get nodes
+
+    NAME                                                STATUS   ROLES    AGE     VERSION
+    fargate-ip-10-0-11-195.us-west-2.compute.internal   Ready    <none>   5m20s   v1.28.2-eks-f8587cb
+    fargate-ip-10-0-27-183.us-west-2.compute.internal   Ready    <none>   5m2s    v1.28.2-eks-f8587cb
+    fargate-ip-10-0-4-169.us-west-2.compute.internal    Ready    <none>   5m3s    v1.28.2-eks-f8587cb
+    fargate-ip-10-0-44-106.us-west-2.compute.internal   Ready    <none>   5m12s   v1.28.2-eks-f8587cb
+    ```
+
+2. Provision the Karpenter `EC2NodeClass` and `NodePool` resources which provide Karpenter the necessary configurations to provision EC2 resources:
+
+    ```sh
+    kubectl apply -f karpenter.yaml
+    ```
+
+3. With the Karpenter resources are in place, when pods are pending in the scheduler's queue, Karpenter will provision the necessary EC2 resources to satisfy those requests. You can demonstrate this with the example deployment provided. First deploy the example deployment which has the initial number replicas set to 0:
+
+    ```sh
+    kubectl apply -f example.yaml
+    ```
+
+4. When you scale the example deployment, you should see Karpenter respond by quickly provisioning EC2 resources to satisfy those pending pod requests:
+
+    ```sh
+    kubectl scale deployment inflate --replicas=3
+    ```
+
+5. Listing the nodes should now show some EC2 compute that Karpenter has created for the example deployment:
+
+    ```sh
+    kubectl get nodes
+
+    NAME                                                STATUS   ROLES    AGE   VERSION
+    fargate-ip-10-0-11-195.us-west-2.compute.internal   Ready    <none>   13m   v1.28.2-eks-f8587cb
+    fargate-ip-10-0-27-183.us-west-2.compute.internal   Ready    <none>   12m   v1.28.2-eks-f8587cb
+    fargate-ip-10-0-4-169.us-west-2.compute.internal    Ready    <none>   12m   v1.28.2-eks-f8587cb
+    fargate-ip-10-0-44-106.us-west-2.compute.internal   Ready    <none>   13m   v1.28.2-eks-f8587cb
+    ip-10-0-32-199.us-west-2.compute.internal           Ready    <none>   29s   v1.28.2-eks-a5df82a # <== EC2 created by Karpenter
+    ```
 
 ## Destroy
 
 Scale down the deployment to de-provision Karpenter created resources first:
 
 ```sh
-kubectl delete deployment inflate
+kubectl delete -f example.yaml
 ```
 
 {%

diff --git a/patterns/karpenter/example.yaml b/patterns/karpenter/example.yaml
@@ -0,0 +1,22 @@
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: inflate
+spec:
+  replicas: 0
+  selector:
+    matchLabels:
+      app: inflate
+  template:
+    metadata:
+      labels:
+        app: inflate
+    spec:
+      terminationGracePeriodSeconds: 0
+      containers:
+        - name: inflate
+          image: public.ecr.aws/eks-distro/kubernetes/pause:3.7
+          resources:
+            requests:
+              cpu: 1
diff --git a/patterns/karpenter/karpenter.yaml b/patterns/karpenter/karpenter.yaml
@@ -0,0 +1,44 @@
+---
+apiVersion: karpenter.k8s.aws/v1beta1
+kind: EC2NodeClass
+metadata:
+  name: default
+spec:
+  amiFamily: AL2
+  role: karpenter-ex-karpenter 
+  subnetSelectorTerms:
+    - tags:
+        karpenter.sh/discovery: ex-karpenter
+  securityGroupSelectorTerms:
+    - tags:
+        karpenter.sh/discovery: ex-karpenter
+  tags:
+    karpenter.sh/discovery: ex-karpenter
+---
+apiVersion: karpenter.sh/v1beta1
+kind: NodePool
+metadata:
+  name: default
+spec:
+  template:
+    spec:
+      nodeClassRef:
+        name: default
+      requirements:
+        - key: "karpenter.k8s.aws/instance-category"
+          operator: In
+          values: ["c", "m", "r"]
+        - key: "karpenter.k8s.aws/instance-cpu"
+          operator: In
+          values: ["4", "8", "16", "32"]
+        - key: "karpenter.k8s.aws/instance-hypervisor"
+          operator: In
+          values: ["nitro"]
+        - key: "karpenter.k8s.aws/instance-generation"
+          operator: Gt
+          values: ["2"]
+  limits:
+    cpu: 1000
+  disruption:
+    consolidationPolicy: WhenEmpty
+    consolidateAfter: 30s
diff --git a/patterns/karpenter/main.tf b/patterns/karpenter/main.tf
@@ -34,28 +34,14 @@ provider "helm" {
   }
 }
 
-provider "kubectl" {
-  apply_retry_count      = 5
-  host                   = module.eks.cluster_endpoint
-  cluster_ca_certificate = base64decode(module.eks.cluster_certificate_authority_data)
-  load_config_file       = false
-
-  exec {
-    api_version = "client.authentication.k8s.io/v1beta1"
-    command     = "aws"
-    # This requires the awscli to be installed locally where Terraform is executed
-    args = ["eks", "get-token", "--cluster-name", module.eks.cluster_name]
-  }
-}
-
 data "aws_ecrpublic_authorization_token" "token" {
   provider = aws.virginia
 }
 
 data "aws_availability_zones" "available" {}
 
 locals {
-  name   = basename(path.cwd)
+  name   = "ex-${basename(path.cwd)}"
   region = "us-west-2"
 
   vpc_cidr = "10.0.0.0/16"
@@ -73,10 +59,10 @@ locals {
 
 module "eks" {
   source  = "terraform-aws-modules/eks/aws"
-  version = "~> 19.16"
+  version = "~> 19.18"
 
   cluster_name                   = local.name
-  cluster_version                = "1.27"
+  cluster_version                = "1.28"
   cluster_endpoint_public_access = true
 
   vpc_id     = module.vpc.vpc_id
@@ -127,7 +113,7 @@ module "eks" {
 
 module "eks_blueprints_addons" {
   source  = "aws-ia/eks-blueprints-addons/aws"
-  version = "~> 1.0"
+  version = "~> 1.10"
 
   cluster_name      = module.eks.cluster_name
   cluster_endpoint  = module.eks.cluster_endpoint
@@ -172,107 +158,14 @@ module "eks_blueprints_addons" {
     repository_username = data.aws_ecrpublic_authorization_token.token.user_name
     repository_password = data.aws_ecrpublic_authorization_token.token.password
   }
+  karpenter_node = {
+    # Use static name so that it matches what is defined in `karpenter.yaml` example manifest
+    iam_role_use_name_prefix = false
+  }
 
   tags = local.tags
 }
 
-################################################################################
-# Karpenter
-################################################################################
-
-resource "kubectl_manifest" "karpenter_provisioner" {
-  yaml_body = <<-YAML
-    apiVersion: karpenter.sh/v1alpha5
-    kind: Provisioner
-    metadata:
-      name: default
-    spec:
-      requirements:
-        - key: "karpenter.k8s.aws/instance-category"
-          operator: In
-          values: ["c", "m"]
-        - key: "karpenter.k8s.aws/instance-cpu"
-          operator: In
-          values: ["8", "16", "32"]
-        - key: "karpenter.k8s.aws/instance-hypervisor"
-          operator: In
-          values: ["nitro"]
-        - key: "topology.kubernetes.io/zone"
-          operator: In
-          values: ${jsonencode(local.azs)}
-        - key: "kubernetes.io/arch"
-          operator: In
-          values: ["arm64", "amd64"]
-        - key: "karpenter.sh/capacity-type" # If not included, the webhook for the AWS cloud provider will default to on-demand
-          operator: In
-          values: ["spot", "on-demand"]
-      kubeletConfiguration:
-        containerRuntime: containerd
-        maxPods: 110
-      limits:
-        resources:
-          cpu: 1000
-      consolidation:
-        enabled: true
-      providerRef:
-        name: default
-      ttlSecondsUntilExpired: 604800 # 7 Days = 7 * 24 * 60 * 60 Seconds
-  YAML
-
-  depends_on = [
-    module.eks_blueprints_addons
-  ]
-}
-
-resource "kubectl_manifest" "karpenter_node_template" {
-  yaml_body = <<-YAML
-    apiVersion: karpenter.k8s.aws/v1alpha1
-    kind: AWSNodeTemplate
-    metadata:
-      name: default
-    spec:
-      subnetSelector:
-        karpenter.sh/discovery: ${module.eks.cluster_name}
-      securityGroupSelector:
-        karpenter.sh/discovery: ${module.eks.cluster_name}
-      instanceProfile: ${module.eks_blueprints_addons.karpenter.node_instance_profile_name}
-      tags:
-        karpenter.sh/discovery: ${module.eks.cluster_name}
-  YAML
-}
-
-# Example deployment using the [pause image](https://www.ianlewis.org/en/almighty-pause-container)
-# and starts with zero replicas
-resource "kubectl_manifest" "karpenter_example_deployment" {
-  yaml_body = <<-YAML
-    apiVersion: apps/v1
-    kind: Deployment
-    metadata:
-      name: inflate
-    spec:
-      replicas: 0
-      selector:
-        matchLabels:
-          app: inflate
-      template:
-        metadata:
-          labels:
-            app: inflate
-        spec:
-          terminationGracePeriodSeconds: 0
-          containers:
-            - name: inflate
-              image: public.ecr.aws/eks-distro/kubernetes/pause:3.7
-              resources:
-                requests:
-                  cpu: 1
-  YAML
-
-  depends_on = [
-    kubectl_manifest.karpenter_node_template
-  ]
-}
-
 ################################################################################
 # Supporting Resources
 ################################################################################

diff --git a/patterns/karpenter/versions.tf b/patterns/karpenter/versions.tf
@@ -14,10 +14,6 @@ terraform {
       source  = "hashicorp/kubernetes"
       version = ">= 2.20"
     }
-    kubectl = {
-      source  = "gavinbunney/kubectl"
-      version = ">= 1.14"
-    }
   }
 
   # ##  Used for end-to-end testing on project; update to suit your needs