This repository demostrate an architecture for porting ☁️Spring Cloud Netflix solution to 🛳Kubernetes. To achieve this goal, we need to find all the important feature in ☁️Spring Cloud Netflix solution and compare the alternatives. If you are also do same thing I do, I hope this repository can help you. If you have any questions, feel free to contact me 🙂.
| feature | Spring | Kubernetes |
|---|---|---|
| Service Discovery | Eureka | Internal DNS |
| Gateway | Cloud Gateway | Istio Ingress Gateway |
| Traffic | Eureka & Feign & Ribbon | Istio Sidecar (Envoy) |
| Circuit Break, Rate Limit, Retry, Timeout, Fast Fall | Hystrix | Istio |
| Monitor | Boot Admin & Actuator | Grafana & Prometheus |
| Trace | Cloud Sleuth & Zipkin | jaeger |
| Config | Cloud Config | Configmap |
| Job | Schedule & Batch | Jobs & CronJob |
| Infrastructure Tool | Terraform Ansible Docker-Compose | Terraform Helm |
- These two are not fully replaced relation! For example, even you use Grafana & Prometheus you still need Actuator to export the metrics in application.
- Istio doesn't have fallback feature until 1.4 but has two interest features (fault injection & mirror)
- Can't find alternative of Spring Security yet.
- Spring Cloud Kubernetes also has Discovery Client, Ribbon and Hystrix feature.
- Properties under spring.cloud.kubernetes.reload. should not be used in config maps or secrets: changing such properties at runtime may lead to unexpected results. ref
| item | frameworks or tools |
|---|---|
| application log | ✅ Elastic Stack |
| business index | ✅ Elastic Stack |
| http 200 | ✅ Prometheus Monitoring Stack & Liveness and Readiness Probes |
| application metrics | ✅ Prometheus Monitoring Stack, jaeger |
| services (Cache, Queue) | ✅ Prometheus Monitoring Stack |
| 3rd party service health | ✅ Prometheus Monitoring Stack |
| k8s cluster metrics | ✅ Prometheus Monitoring Stack, kiali |
| database | ✅ Prometheus Monitoring Stack |
| end to end testing | ✅ CronJob & Python health-checker |
install brew
/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
install kubectl
brew install kubectl
install Java
umm ..., I need to teach you this ? 🤣
install and create default cluster
brew install k3d
k3d create --server-arg --no-deploy --server-arg traefik
export KUBECONFIG="$(k3d get-kubeconfig --name='k3s-default')"
kubectl cluster-info
helm 2 https://v2.helm.sh/
helm diff https://github.com/databus23/helm-diff
install
brew install helm@2
echo 'export PATH="/usr/local/opt/helm@2/bin:$PATH"' >> ~/.zshrc
source ~/.zshrc
helm plugin install https://github.com/databus23/helm-diff --version master
delete it not empty, like a reinstall process
kubectl get all --all-namespaces | grep tiller
kubectl delete deployment tiller-deploy -n kube-system
kubectl delete service tiller-deploy -n kube-system
should be empty
kubectl get all --all-namespaces | grep tiller
configure helm on default cluster
helm version
helm init
kubectl create serviceaccount --namespace kube-system tiller
kubectl create clusterrolebinding tiller-cluster-rule --clusterrole=cluster-admin --serviceaccount=kube-system:tiller
kubectl patch deploy --namespace kube-system tiller-deploy -p '{"spec":{"template":{"spec":{"serviceAccount":"tiller"}}}}'
Istio https://istio.io/
install
cd ~ && curl -L https://istio.io/downloadIstio | sh -
cd istio-1.4.2
echo 'export PATH="'$(pwd)'/bin:$PATH"' >> ~/.zshrc
source ~/.zshrc
configure istio on default cluster
istioctl manifest apply --set profile=demo
kubectl get svc,pods -n istio-system
kubectl label namespace default istio-injection=enabled
helm install --name sample-redis --values ./helm/local/values.yaml stable/redis
helm install --name sample-rabbitmq --values ./helm/local/values.yaml stable/rabbitmq
helm install --name sample-mysql --values ./helm/local/values.yaml stable/mysql
helm install --name sample-logstash --values ./values.yaml stable/logstash
helm install --dry-run --debug --name sample ./helm/local
helm install --name sample ./helm/local
helm upgrade --force sample ./helm/local
kubectl port-forward svc/istio-ingressgateway 10080:80 -n istio-system
Grafana https://grafana.com/
kiali https://kiali.io/
enable Grafana, jaeger and kiali (admin/admin) with istioctl in default cluster
istioctl manifest apply \
--set values.kiali.enabled=true \
--set values.grafana.enabled=true \
--set values.tracing.enabled=true \
--set "values.kiali.dashboard.jaegerURL=http://jaeger-query:63399" \
--set "values.kiali.dashboard.grafanaURL=http://grafana:3000"
kubectl -n istio-system get svc prometheus
kubectl -n istio-system get svc grafana
kubectl -n istio-system get svc kiali
kubectl -n istio-system port-forward $(kubectl -n istio-system get pod -l app=grafana -o jsonpath='{.items[0].metadata.name}') 3000:3000 &
istioctl dashboard jaeger
istioctl dashboard kiali
echo DOCKER_HUB_USERNAME=$DOCKER_HUB_USERNAME >> ~/.zshrc
echo DOCKER_HUB_PASSWORD=$DOCKER_HUB_PASSWORD >> ~/.zshrc
./mvnw compile jib:build -Djib.to.auth.username=$DOCKER_HUB_USERNAME -Djib.to.auth.password=$DOCKER_HUB_PASSWORD
helm delete --purge sample
istioctl manifest generate --set profile=demo | kubectl delete -f -
k3d delete