A simple cloud native app for Cloud Native Victoria Meetup
This tutorial demostrates deploying a cloud native application that runs on Kubernetes along side Prometheus, Fluentd and Istio to provide a complete platform to run your microservices on.
Configure google cloud region and zone
gcloud config set compute/region us-west1gcloud config set compute/zone us-west1-bCreate Kubernetes Cluster
gcloud container clusters create cloud-native-app \
--machine-type n1-standard-1 \
--num-nodes 3 \
--cluster-version 1.7.5Wait for the kubernetes cluster to come up
it might take couple of minutes
gcloud container clusters listNAME ZONE MASTER_VERSION MASTER_IP MACHINE_TYPE NODE_VERSION NUM_NODES STATUS
cloud-native-app us-west1-b 1.7.5 35.197.117.21 n1-standard-1 1.7.5 3 RUNNINGConfigure kubectl to point to the kubernetes cluster
gcloud container clusters get-credentials cloud-native-app --zone us-west1-b --project {PROJECT_NAME}Follow the guide on Istio's website to install Istio on Kubernetes. Just make sure you get to the Verify the installation step.
Now you have istio and the addons like Prometheus, Grafana and ServiceGraph installed!
go run main.go2017/09/20 15:43:29 starting web server on port :8080In a new terminal test the application
curl localhost:8080You've hit the home page of the cloud native app with hostname "hostname.local" on node "".Cool! Our app works!
Lets build a docker container
GOOS=linux GOARCH=amd64 go build -v .docker build -t anubhavmishra/cloud-native-app:v0.1.0 .docker tag anubhavmishra/cloud-native-app:v0.1.0 anubhavmishra/cloud-native-app:latestNow lets test the docker image
docker run -it -p 8080:8080 anubhavmishra/cloud-native-appIn a new terminal curl the application
curl localhost:8080You've hit the home page of the cloud native app with hostname "docker-hostname" on node "".Push the docker image to docker registry (docker hub)
docker push anubhavmishra/cloud-native-app:v0.1.0
docker push anubhavmishra/cloud-native-app:latestAwesome! Now we have a docker image of our app. Lets deploy it to kubernetes
kubectl apply -f kubernetes/cloud-native-app-deployment.yamlCheck if it is running
kubectl get pods | grep cloud-native-appcloud-native-app-913471705-4j2zx 1/1 Running 0 15sTest the app
kubectl port-forward cloud-native-app-913471705-4j2zx 8080:8080In a new terminal curl the application
curl localhost:8080You've hit the home page of the cloud native app with hostname "cloud-native-app-913471705-4j2zx" on node "node-name".Lets expose this application to the world
kubectl apply -f kubernetes/cloud-native-app-service.yamlCheck if the service is up
kubectl get service cloud-native-appGive it a minute for the
EXTERNAL-IPto show up
NAME CLUSTER-IP EXTERNAL-IP PORT(S) AGE
cloud-native-app 10.7.253.76 35.203.186.75 80:31567/TCP 2mIn a new terminal curl the EXTERNAL-IP
curl 35.203.186.75:8080You've hit the home page of the cloud native app with hostname "cloud-native-app-913471705-4j2zx" on node "node-name".Scale the application
kubectl scale deployment cloud-native-app --replicas=3Check if the application is scaled
kubectl get pods | grep cloud-native-appcloud-native-app-913471705-4j2zx 1/1 Running 0 16m
cloud-native-app-913471705-djpnz 1/1 Running 0 58s
cloud-native-app-913471705-v247t 1/1 Running 0 58sGet some logs
kubectl logs -f {POD_NAME}- Look at fluentd and GCP
First we delete currently running cloud-native-app service since it exposed as LoadBalancer type
kubectl delete -f cloud-native-app-service.yamlLet's explore the our microservices
vim kubernetes/cloud-native-microservices-v1.yamlkubectl apply -f <(istioctl kube-inject -f kubernetes/cloud-native-microservices-v1.yaml --namespace=istio-system)kubectl apply -f <(istioctl kube-inject -f kubernetes/cloud-native-app-ingress.yaml --namespace=istio-system)Now lets find our ingress
kubectl get ingress cloud-native-app-gatewaykubectl describe ingress cloud-native-app-gatewaycurl the ip or domain
curl -H 'Host: cloud-native-app.livedemos.xyz' 104.196.249.219curl cloud-native-app.livedemos.xyzLets loop it!
while true; do curl -H 'Host: cloud-native-app.livedemos.xyz' 104.196.249.219; echo ""; sleep 0.5;doneDeploy v2 of the applications
kubectl apply -f <(istioctl kube-inject -f kubernetes/cloud-native-microservices-v2.yaml --namespace=istio-system)istioctl create -f rules/foo.yaml --namespace=istio-systemistioctl create -f rules/bar.yaml --namespace=istio-systemistioctl get route-rules --namespace=istio-systemfoo-istio-system
bar-istio-systemLets now try to shape some traffic for foo application
vim rules/foo.yamlistioctl replace -f rules/foo.yaml --namespace=istio-systemI want to canary a mobile device
istioctl create -f rules/foo-mobile.yaml --namespace=istio-systemistioctl delete route-rule foo-canary --namespace istio-systemDeny
istioctl mixer rule create global foo.istio-system.svc.cluster.local -f rules/foo-deny.yaml --namespace istio-systemistioctl mixer rule delete global foo.istio-system.svc.cluster.local --namespace istio-system
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