Ktor on JVM and Native (linux) in Docker and Kubernetes

This repository contains materials for my KotlinConf 2023 talk.

The instructions below are based on Minikube and Ddosify.

gradle assemble

Building the docker images

docker build -f Dockerfile-jvm -t ktor-jvm:v1.0.0 .

docker build -f Dockerfile-linux -t ktor-native:v1.0.0 .

Copy docker image to minikube registry

minikube image load ktor-jvm:v1.0.0

minikube image load ktor-native:v1.0.0

Exposing with Minikube

minikube service service-ktor-jvm --url

minikube service service-ktor-native --url

minikube service prometheus-kube-prometheus-prometheus --url

Load test with Ddosify

 ddosify -t http://127.0.0.1:[port]/cat/{{_randomInt}} -d 60 -n 1000 -l incremental

PromQL (Prometheus)

(container_memory_working_set_bytes)* on (pod) kube_pod_info{pod=~"deployment-ktor-jvm-.+|deployment-ktor-native-.+"}

sum(
    rate(container_cpu_usage_seconds_total[5m])
) by (pod) * on (pod) kube_pod_info{pod=~"deployment-ktor-jvm-.+|deployment-ktor-native-.+"}