04-instrument.sh

cd k8s-specs

git pull

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

curl http://$GD5_ADDR/demo/hello

for i in {1..20}; do
    DELAY=$[ $RANDOM % 10000 ]
    curl "http://$GD5_ADDR/demo/hello?delay=$DELAY"
done

open "http://$PROM_ADDR/alerts"

# Prometheus expression
# sum(rate(
#     nginx_ingress_controller_request_duration_seconds_sum{
#         ingress="go-demo-5"
#     }[5m]
# )) / 
# sum(rate(
#     nginx_ingress_controller_request_duration_seconds_count{
#         ingress="go-demo-5"
#     }[5m]
# ))

open "https://github.com/vfarcic/go-demo-5/blob/master/main.go"

kubectl -n metrics \
    run -it test \
    --image=appropriate/curl \
    --restart=Never \
    --rm \
    -- go-demo-5.go-demo-5:8080/metrics

open "http://$PROM_ADDR/targets"

open "http://$PROM_ADDR/graph"

# Prometheus expression
# http_server_resp_time_count

# Prometheus expression
# http_server_resp_time_sum{
#     kubernetes_name="go-demo-5"
# } / 
# http_server_resp_time_count{
#     kubernetes_name="go-demo-5"
# }

for i in {1..20}; do
    DELAY=$[ $RANDOM % 10000 ]
    curl "http://$GD5_ADDR/demo/hello?delay=$DELAY"
done

open "http://$PROM_ADDR/alerts"

# Prometheus expression
# sum(rate(
#     http_server_resp_time_bucket{
#         le="0.1",
#         kubernetes_name="go-demo-5"
#     }[5m]
# )) /
# sum(rate(
#     http_server_resp_time_count{
#         kubernetes_name="go-demo-5"
#     }[5m]
# ))

# Prometheus expression
# sum(rate(
#     http_server_resp_time_bucket{
#         le="0.1",
#         kubernetes_name="go-demo-5"
#     }[5m]
# )) 
# by (method, path) / 
# sum(rate(
#     http_server_resp_time_count{
#         kubernetes_name="go-demo-5"
#     }[5m]
# )) 
# by (method, path)

# Prometheus expression
# sum(rate(
#     http_server_resp_time_bucket{
#         le="0.1",
#         kubernetes_name="go-demo-5"
#     }[5m]
# )) 
# by (method, path) / 
# sum(rate(
#     http_server_resp_time_count{
#         kubernetes_name="go-demo-5"
#     }[5m]
# )) 
# by (method, path) < 0.99

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

kubectl delete ns go-demo-5