feat(istio): circuitbreaker example

Author: rolandszoke

istio_examples/CircuitBreaker/circuitBreaker.yml

@@ -1,18 +1,13 @@
-apiVersion: config.istio.io/v1beta1
+apiVersion: config.istio.io/v1alpha2
 kind: DestinationPolicy
 metadata:
-  name: api-circuit-breaker
+  name: github-circuit-breaker
 spec:
   destination:
-    name: api
-    labels:
-      version: v1
+    name: github
   circuitBreaker:
     simpleCb:
-      maxConnections: 1
       httpMaxPendingRequests: 1
       sleepWindow: 3m
       httpDetectionInterval: 1s
       httpMaxEjectionPercent: 100
-      httpConsecutiveErrors: 1
-      httpMaxRequestsPerConnection: 1

istio_examples/CircuitBreaker/deploy.sh

@@ -1,3 +1,10 @@
-FOLDER=$( cd "$(dirname "${BASH_SOURCE[0]}")" ; pwd -P )
+#!/bin/bash
 
-istioctl create -f $FOLDER/circuitBreaker.yml
+DIR=$(pwd)
+
+kubectl delete destinationpolicy github-circuit-breaker
+kubectl apply -f <(istioctl kube-inject -f $DIR/circuitBreaker.yml)
+
+echo "Testing... (sending 3 request simultaneously)"
+POD=$(kubectl get pod -l app=api -o jsonpath='{.items[0].metadata.name}')
+kubectl exec -it $POD -c api  -- sh -c "curl -s -I http://github.default.svc.cluster.local:5000/api/hello/ | grep HTTP/1.1 & curl -s -I http://github.default.svc.cluster.local:5000/api/hello | grep HTTP/1.1 & curl -s -I http://github.default.svc.cluster.local:5000/api/hello | grep HTTP/1.1 & sleep 2s"

istio_examples/Services/destroy.sh

@@ -1,3 +1,11 @@
 #!/bin/bash
 
 kubectl delete deployment,svc,ingress,routerule,destinationpolicy --all
+
+kubectl delete -f <(istioctl kube-inject -f RateLimiting/adapter.yml)
+kubectl delete -f <(istioctl kube-inject -f RateLimiting/instance.yml)
+kubectl delete -f <(istioctl kube-inject -f RateLimiting/rule.yml)
+
+kubectl delete -f ~/istio-0.4.0/install/kubernetes/addons/prometheus.yaml
+kubectl delete -f ~/istio-0.4.0/install/kubernetes/addons/zipkin.yaml
+kubectl delete -f https://raw.githubusercontent.com/jaegertracing/jaeger-kubernetes/master/all-in-one/jaeger-all-in-one-template.yml -n istio-system