Jim-Lin/exam-hall

a containerized Kubernetes microservice with Spring WebFlux backend and React frontend

Architecture

GCP

requirements

• Cloud SDK

create cluster

gcloud container clusters create examhall --machine-type g1-small --num-nodes 2 --enable-autoscaling --min-nodes 2 --max-nodes 5 --zone asia-east1-b
gcloud config set container/cluster examhall
gcloud container clusters get-credentials examhall

GKE

deployment & service

kubectl apply -f core.yaml
kubectl apply -f ui.yaml

load balancer

kubectl create configmap nginx-config --from-file=default.conf
kubectl apply -f nginx.yaml

check pods status

kubectl get pods -l app=examhall -o wide

Continuous Deployment with Google Container Registry (GCR)

give Container Builder Service Account container.developer role access to your Kubernetes Engine clusters

PROJECT="$(gcloud projects describe \
    $(gcloud config get-value core/project -q) --format='get(projectNumber)')"

gcloud projects add-iam-policy-binding $PROJECT \
    --member=serviceAccount:$PROJECT@cloudbuild.gserviceaccount.com \
    --role=roles/container.developer

1. push to GitHub with tag
2. trigger build image in GCR
   • run cloudbuild.yaml to build steps
3. apply Kubernetes configuration files

cleanup

kubectl delete configmap nginx-config
kubectl delete --all svc
kubectl delete --all deployment

gcloud container clusters delete examhall

local

requirements

• Docker

Docker Compose

build

docker-compose build

run

docker-compose up -d

cleanup

docker-compose rm -s