05-hpa-custom-metrics.sh

cd k8s-specs

git pull

helm install prometheus-adapter \
    stable/prometheus-adapter \
    --version 1.4.0 \
    --namespace metrics \
    --set metricsRelistInterval=90s \
    --set prometheus.url=http://prometheus-server.metrics.svc \
    --set prometheus.port=80

kubectl -n metrics \
    rollout status \
    deployment prometheus-adapter

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

GD5_ADDR=go-demo-5.$LB_IP.nip.io

kubectl create namespace go-demo-5

helm install go-demo-5 \
    https://github.com/vfarcic/go-demo-5/releases/download/0.0.1/go-demo-5-0.0.1.tgz \
    --namespace go-demo-5 \
    --set ingress.host=$GD5_ADDR

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

for i in {1..100}; do
    curl "http://$GD5_ADDR/demo/hello"
done

kubectl get --raw \
    "/apis/custom.metrics.k8s.io/v1beta1" \
    | jq '.resources[] 
    | select(.name 
    | contains("nginx_ingress_controller_requests"))'

kubectl get --raw \
    "/apis/custom.metrics.k8s.io/v1beta1" \
    | jq '.resources[] 
    | select(.name 
    | contains("http_server_resp_time_count"))'

kubectl -n metrics \
    describe cm prometheus-adapter

cat mon/prom-adapter-values-ing.yml

helm upgrade prometheus-adapter \
    stable/prometheus-adapter \
    --version 1.4.0 \
    --namespace metrics \
    --values mon/prom-adapter-values-ing.yml

kubectl -n metrics \
    rollout status \
    deployment prometheus-adapter

kubectl -n metrics \
    describe cm prometheus-adapter

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

cat mon/go-demo-5-hpa-ing.yml

kubectl -n go-demo-5 \
    apply -f mon/go-demo-5-hpa-ing.yml

kubectl -n go-demo-5 \
    describe hpa go-demo-5

for i in {1..100}; do
    curl "http://$GD5_ADDR/demo/hello"
done

kubectl -n go-demo-5 \
    describe hpa go-demo-5

kubectl -n go-demo-5 get pods

kubectl -n go-demo-5 \
    describe hpa go-demo-5

cat mon/prom-adapter-values-svc.yml

helm upgrade prometheus-adapter \
    stable/prometheus-adapter \
    --version 1.4.0 \
    --namespace metrics \
    --values mon/prom-adapter-values-svc.yml

kubectl -n metrics \
    rollout status \
    deployment prometheus-adapter

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

kubectl get --raw \
    "/apis/custom.metrics.k8s.io/v1beta1/namespaces/go-demo-5/services/*/http_req_per_second_per_replica" \
    | jq .

cat mon/go-demo-5-hpa-svc.yml

kubectl -n go-demo-5 \
    apply -f mon/go-demo-5-hpa-svc.yml

kubectl -n go-demo-5 \
    describe hpa go-demo-5

kubectl -n go-demo-5 \
    run -it test \
    --image=debian \
    --restart=Never \
    --rm \
    -- bash

apt update

apt install -y curl

for i in {1..500}; do
    curl "http://go-demo-5:8080/demo/hello"
done

exit

kubectl -n go-demo-5 \
    describe hpa go-demo-5

kubectl -n go-demo-5 get pods

cat mon/go-demo-5-hpa.yml

kubectl -n go-demo-5 \
    apply -f mon/go-demo-5-hpa.yml

kubectl -n go-demo-5 \
    describe hpa go-demo-5

helm delete go-demo-5 \
    --namespace go-demo-5

kubectl delete ns go-demo-5