http_server

A dead simple Ruby web server. Serves on port 80. /healthcheck path returns "OK" All other paths return "Well, hello there!"

$ ruby webserver.rb

Requirements

1. kubectl
2. helm3
3. docker

Fixes

I have added 3 lines of code into http_server.rb to make it compatible with HTTP1.1 protocol, otherwise more complex workarounds required to enable healthcheck.

Start minikube and config default profile

minikube started with this command minikube start --vm-driver=none default namespace in use for simplify the task

Run cicd.sh from repo root folder.

what script does: build docker container adjust:latest on localhost docker build -t adjust:latest .

deploy it with helm. helm upgrade --install adjust -f values.yaml helm_chart 3 replicas and healthcheck enabled. Service should be available withing the k8s as adjust.default.svc.cluster.local FQDN. Run test. kubectl run -i --tty test --image=adjust:latest --rm --image-pull-policy='Never' --restart=Never --command -- curl adjust.default.svc.cluster.local

It runs the same container adjust:latest, because it have built-in curl command, run curl adjust.default.svc.cluster.local and print ok if grep lines "Well, hello there"

Consideration

Because there is no mention about ingress, open public port or use HPA, there is no port accessible outside K8S and there is no autoscaling implemented.