K8s in Google Cloud Platform - Experiment

This is an experiment to see how K8S works in Google Cloud Platform (GCP), using Google Kubernetes Engine (GKE).

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Application

The app folder contains a simple application that exposes some commands through routes:

Route	Description
/products	Outputs a list of dummy products.
/debug	Outputs the hostname and an environment variable value.
/health	Outputs "200 OK", used in health checks.
/shutdown	Forces the application to exit with code 0.

This app is containerized and the image was pushed to Docker Hub: https://hub.docker.com/r/osvaldomargato/dummy-api-products/tags

How to run

Requirements: go

cd ./app
make build
./output/api

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Kubernetes

The application is exposed through a basic service that points to a replica set.

How to run

Requirements: minikube if running locally, kubectl.

Deploy manifests:

cd ./k8s
kubectl create ns ecommerce
kubectl config set-context --current --namespace=ecommerce
kubectl apply -f .

Check if pods are running:

kubectl get pods

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Cloud

The IaC tools used in this project was Terraform, and GCP was choosed as the cloud provider.

Requirements: GCP project with GKE API enabled, Terraform CLI, Terraform + GCP login configured.

PS.: Don't forget to change project_id in ./iac/envs/dev.tfvars

How to run

cd ./iac
make apply

Check if pods are running:

kubectl get pods

Get external IP from service:

kubectl get svc

Test connection with application:

curl http://<external-ip>/products
curl http://<external-ip>/debug
curl http://<external-ip>/health
curl http://<external-ip>/shutdown