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service-mesh-demo.md

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Open Source Summit 2019 - San Diego

Lightning Talk: Service Mesh Up and Running in 5 Minutes

Pre-demo

Note: this demo uses a sample application from a separate repo (Kubernetes Hackfest)

  • Kubernetes secret

    export RGNAME=oss-summit-west
export COSMOSNAME=briarosssummit
export APPINSIGHTS_INSTRUMENTATIONKEY=<replace me>
export MONGODB_USER=$(az cosmosdb show --name $COSMOSNAME --resource-group $RGNAME --query "name" -o tsv)
export MONGODB_PASSWORD=$(az cosmosdb list-keys --name $COSMOSNAME --resource-group $RGNAME --query "primaryMasterKey" -o tsv)

kubectl create secret generic cosmos-db-secret --from-literal=user=$MONGODB_USER --from-literal=pwd=$MONGODB_PASSWORD --from-literal=appinsights=$APPINSIGHTS_INSTRUMENTATIONKEY -n tracker

  • Run app

    kubectl apply -f ./k8s/ -n tracker

OR
kubectl apply -f ./data-api.yaml -n tracker
kubectl apply -f ./data-api-2.yaml -n tracker

  • Generate activity (Artillery)

    https://github.com/chzbrgr71/load-test-artillery

    # simple test
az container create --name flights-load-test1 --image chzbrgr71/loadtest:v2.0 --resource-group aci -o tsv --cpu 1 --memory 1 --environment-variables load_duration=-1 load_rate=5 load_url=104.40.29.56:3003/latest

az container delete --yes --resource-group aci --name flights-load-test1

# run all
export FLIGHTS_IP=$(kubectl get svc --namespace tracker flights-api -o jsonpath='{.status.loadBalancer.ingress[0].ip}') && echo $FLIGHTS_IP
export QUAKES_IP=$(kubectl get svc --namespace tracker quakes-api -o jsonpath='{.status.loadBalancer.ingress[0].ip}') && echo $QUAKES_IP
export WEATHER_IP=$(kubectl get svc --namespace tracker weather-api -o jsonpath='{.status.loadBalancer.ingress[0].ip}') && echo $WEATHER_IP

for i in 1 2; do
    az container create --name flights-load-test${i} -l westus --image chzbrgr71/loadtest:v2.0 --resource-group aci -o tsv --cpu 1 --memory 1 --environment-variables load_duration=-1 load_rate=2 load_url=$FLIGHTS_IP:3003/latest
    az container create --name quakes-load-test${i} -l westus --image chzbrgr71/loadtest:v2.0 --resource-group aci -o tsv --cpu 1 --memory 1 --environment-variables load_duration=-1 load_rate=2 load_url=$QUAKES_IP:3012/latest
    az container create --name weather-load-test${i} -l westus --image chzbrgr71/loadtest:v2.0 --resource-group aci -o tsv --cpu 1 --memory 1 --environment-variables load_duration=-1 load_rate=2 load_url=$WEATHER_IP:3015/latest
done

Live Demo Steps

  • Show application

    export WEB_URL=http://$(kubectl get svc --namespace tracker service-tracker-ui -o jsonpath='{.status.loadBalancer.ingress[0].ip}'):8080 && echo $WEB_URL

  • Install Linkerd

    linkerd check --pre

linkerd install | kubectl apply -f -

linkerd check

kubectl -n linkerd get deploy

linkerd dashboard

linkerd stat namespaces

  • Mesh application

    # data-api first
linkerd inject ./k8s/data-api.yaml | kubectl apply -n tracker -f -
linkerd inject ./data-api-2.yaml | kubectl apply -n tracker -f -

# the rest
linkerd inject ./k8s/ | kubectl apply -n tracker -f -

# 1 by 1
linkerd inject ./k8s/data-api-2.yaml | kubectl apply -n tracker -f -
linkerd inject ./k8s/flights-api-canary.yaml | kubectl apply -n tracker -f -
linkerd inject ./k8s/flights-api-v1.yaml | kubectl apply -n tracker -f -
linkerd inject ./k8s/quakes-api.yaml | kubectl apply -n tracker -f -
linkerd inject ./k8s/weather-api.yaml | kubectl apply -n tracker -f -
linkerd inject ./k8s/service-tracker-ui.yaml | kubectl apply -n tracker -f -
linkerd inject ./k8s/debug-pod.yaml | kubectl apply -n tracker -f -

  • Show Dashboard

    linkerd dashboard

  • Interesting Linkerd commands

    linkerd stat namespaces

linkerd stat deployments -n tracker

linkerd top namespace/tracker

linkerd edges pod -n tracker

  • SMI Traffic Split

    • Remove flights-api

      kubectl delete deploy -n tracker flights-api
kubectl delete service -n tracker flights-api

    • Deploy v1

      linkerd inject ./k8s/flights-api-v1.yaml | kubectl apply -n tracker -f -

    • Deploy canary build

      linkerd inject ./k8s/flights-api-canary.yaml | kubectl apply -n tracker -f -

    • Debug pod

      linkerd inject ./k8s/debug-pod.yaml | kubectl apply -n tracker -f -

kubectl exec -it debug-57bf5cdf6-7j2mg -n tracker bash

curl http://flights-api.tracker.svc.cluster.local:3003/status
curl http://flights-api-v1.tracker.svc.cluster.local:3003/status
curl http://flights-api-canary.tracker.svc.cluster.local:3003/status

while true; do curl http://flights-api.tracker.svc.cluster.local:3003/status; sleep 1; done
while true; do curl http://flights-api-canary.tracker.svc.cluster.local:3003/status; sleep 1; done

    • SMI Traffic Split

      kubectl apply -f ./traffic-split.yaml -n tracker

Clean-up

  • Stop load testing

    for i in 1 2; do
    az container delete --yes --resource-group aci --name flights-load-test${i}
    az container delete --yes --resource-group aci --name quakes-load-test${i}
    az container delete --yes --resource-group aci --name weather-load-test${i}
done

  • Unmesh app

    # 1 by 1
linkerd inject ./k8s/data-api-2.yaml | kubectl delete -n tracker -f -
linkerd inject ./k8s/flights-api-canary.yaml | kubectl delete -n tracker -f -
linkerd inject ./k8s/flights-api-v1.yaml | kubectl delete -n tracker -f -
linkerd inject ./k8s/quakes-api.yaml | kubectl delete -n tracker -f -
linkerd inject ./k8s/weather-api.yaml | kubectl delete -n tracker -f -
linkerd inject ./k8s/service-tracker-ui.yaml | kubectl delete -n tracker -f -
linkerd inject ./k8s/debug-pod.yaml | kubectl delete -n tracker -f -    
    kubectl delete -f ./traffic-split.yaml -n tracker

kubectl delete -f ./k8s/ -n tracker

  • Uninstall Linkerd

    linkerd install --ignore-cluster | kubectl delete -f -