01-hpa.sh

git clone https://github.com/vfarcic/k8s-specs.git

cd k8s-specs

# Only if NOT EKS or GKE
helm install stable/metrics-server \
    --name metrics-server \
    --version 2.0.2 \
    --namespace metrics

# Only if NOT EKS or GKE
kubectl -n metrics \
    rollout status \
    deployment metrics-server

kubectl top nodes

kubectl top nodes

kubectl -n kube-system top pod

kubectl top pods --all-namespaces

kubectl top pods \
  --all-namespaces \
  --containers

kubectl get \
    --raw "/apis/metrics.k8s.io/v1beta1" \
    | jq '.'

kubectl get \
    --raw "/apis/metrics.k8s.io/v1beta1/pods" \
    | jq '.'

cat scaling/go-demo-5-no-sidecar-mem.yml

kubectl apply \
    -f scaling/go-demo-5-no-sidecar-mem.yml \
    --record

kubectl -n go-demo-5 \
    rollout status \
    deployment api

kubectl -n go-demo-5 get pods

cat scaling/go-demo-5-api-hpa.yml

kubectl apply \
    -f scaling/go-demo-5-api-hpa.yml \
    --record

kubectl -n go-demo-5 get hpa

kubectl -n go-demo-5 get hpa

kubectl -n go-demo-5 describe hpa api

kubectl -n go-demo-5 get pods

cat scaling/go-demo-5-db-hpa.yml

kubectl apply \
    -f scaling/go-demo-5-db-hpa.yml \
    --record

kubectl -n go-demo-5 get hpa

kubectl -n go-demo-5 describe hpa db

cat scaling/go-demo-5-no-hpa.yml

kubectl apply \
    -f scaling/go-demo-5-no-hpa.yml \
    --record

kubectl -n go-demo-5 get hpa

kubectl -n go-demo-5 get pods

cat scaling/go-demo-5-api-hpa-low-mem.yml

kubectl apply \
    -f scaling/go-demo-5-api-hpa-low-mem.yml \
    --record

kubectl -n go-demo-5 get hpa

kubectl -n go-demo-5 get hpa

kubectl -n go-demo-5 describe hpa api

kubectl -n go-demo-5 describe hpa api

kubectl -n go-demo-5 get pods

kubectl apply \
    -f scaling/go-demo-5-api-hpa.yml \
    --record

kubectl -n go-demo-5 describe hpa api

kubectl -n go-demo-5 get pods

cat scaling/go-demo-5-replicas-10.yml

kubectl apply \
  -f scaling/go-demo-5-replicas-10.yml

kubectl -n go-demo-5 get pods

kubectl -n go-demo-5 get pods

kubectl -n go-demo-5 \
  describe deployment api

diff \
  scaling/go-demo-5-replicas-10.yml \
  scaling/go-demo-5.yml

kubectl apply \
  -f scaling/go-demo-5.yml

kubectl -n go-demo-5 \
  describe deployment api

kubectl delete -f scaling/go-demo-5.yml

kubectl apply \
  -f scaling/go-demo-5.yml

kubectl -n go-demo-5 \
  describe deployment api

kubectl -n go-demo-5 \
  describe deployment api

kubectl apply \
  -f scaling/go-demo-5-2-5.yml

kubectl -n go-demo-5 \
  describe deployment api

# If NOT GKE or AKS
helm delete metrics-server --purge

kubectl delete ns go-demo-5