Optimize Costs for Google Kubernetes Engine: Challenge Lab

Task 1. Create our cluster and deploy our app

  • Set default compute/zone
gcloud config set compute/zone us-central1-a
  • Create a cluster
gcloud container clusters create cluster-name-change-me --num-nodes=2 --machine-type=n1-standard-2  --release-channel=rapid
  • Create namespaces
kubectl create namespace dev && kubectl create namespace prod

Task 2. Migrate to an optimized node pool

  • List all node pool
gcloud container node-pools list --cluster=cluster-name-change-me
  • Create a new node pool
gcloud container node-pools create node-pool-change-me \
  --cluster=cluster-name-change-me \
  --machine-type=custom-2-3584 \
  --num-nodes=2
  • Cordoning off and Draining default-pool.
    • Cordon the existing node pool 
      for node in $(kubectl get nodes -l cloud.google.com/gke-nodepool=node-pool-change-me -o=name); do kubectl cordon "$node"; done
    • Drain the existing node pool 
      for node in $(kubectl get nodes -l cloud.google.com/gke-nodepool=node-pool-change-me -o=name); do kubectl drain --force --ignore-daemonsets --delete-local-data --grace-period=10 "$node" ; done
  • Checking pods running on new node-pool
kubectl get pods --namespace dev -o wide
  • Delete old node-pool
gcloud container node-pools delete default-pool --cluster hello-demo-cluster --zone us-central1-a

Task 3. Apply a frontend update

  • Create a pod disruption budget
kubectl create poddisruptionbudget gb-pdb-change-me --namespace dev --selector app=frontend --min-available 1
  • Update Image version: Source file on Github
  • Add a newline of imagePullPolicy:Always next to image: tag
  • Set edit user export KUBE_EDITOR="nano"
  • Describe deployment: kubectl describe deployments
  • Edit deployment: kubectl edit deployment/nginx-deployment
  • Apply changes: kubectl apply -f ./release/kubernetes-manifests.yaml --namespace dev

Task 4. Autoscale from estimated traffic

  • In Cloud Shell, run this command to inspect your cluster’s deployments:
kubectl get deployments
  • Apply horizontal autoscaling to the php-apache deployment:
kubectl autoscale deployment php-apache --namespace dev --cpu-percent=50 --min=1 --max=10
  • Enable autoscaling for your cluster:
gcloud beta container clusters update cluster-name-change-me --enable-autoscaling --min-nodes 1 --max-nodes 5