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‎kubernetes-manifests/istio/helloworld/README.md‎

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# Istio Sample Project - helloworld
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## Deploy Sample Apps, Ingress Gateway, and Destination Rules
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```sh
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# helloworld v1 & v2 App
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kubectl apply -f <(istioctl kube-inject --debug -f helloworld-app.yaml)
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# or if automatic injestion is enabled
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kubectl apply -f helloworld-app.yaml
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# Istio Destination Rules
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kubectl apply -f istio-destinationrule.yaml
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# Istio Ingress Gateway
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kubectl apply -f istio-gateway.yaml
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```
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Get the URL of the ingress controller
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```sh
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GATEWAY_URL=$(kubectl get svc istio-ingressgateway -n istio-system -o 'jsonpath={.status.loadBalancer.ingress[0].ip}'):$(kubectl get svc istio-ingressgateway -n istio-system -n istio-system -o 'jsonpath={.spec.ports[0].targetPort}')
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echo $GATEWAY_URL
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```
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## Configure Istio VirtualService to control traffic
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### Route 50% traffic to v1 & 50% to v2 version
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```sh
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kubectl apply -f istio-virtualservice-even.yaml
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```
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Access Test: Request to Gateway (Ingest)
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```sh
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while true; do curl http://$GATEWAY_URL/hello; sleep 1; done
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Hello version: v2, instance: helloworld-green-6b8b6b674d-b5nbs
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Hello version: v1, instance: helloworld-blue-84c7b5cf84-5rttf
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Hello version: v2, instance: helloworld-green-6b8b6b674d-b5nbs
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Hello version: v2, instance: helloworld-green-6b8b6b674d-b5nbs
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Hello version: v1, instance: helloworld-blue-84c7b5cf84-5rttf
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Hello version: v1, instance: helloworld-blue-84c7b5cf84-5rttf
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```
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### Route 10% traffic to v1 & 90% to v2
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```sh
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kubectl apply -f istio-virtualservice-blue10-green90.yam
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```
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Access Test: Request to Gateway (Ingest)
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```sh
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while true; do curl http://$GATEWAY_URL/hello; sleep 1; done
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Hello version: v2, instance: helloworld-green-6b8b6b674d-b5nbs
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Hello version: v1, instance: helloworld-blue-84c7b5cf84-5rttf
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Hello version: v2, instance: helloworld-green-6b8b6b674d-b5nbs
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Hello version: v2, instance: helloworld-green-6b8b6b674d-b5nbs
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Hello version: v2, instance: helloworld-green-6b8b6b674d-b5nbs
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Hello version: v2, instance: helloworld-green-6b8b6b674d-b5nbs
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Hello version: v2, instance: helloworld-green-6b8b6b674d-b5nbs
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Hello version: v2, instance: helloworld-green-6b8b6b674d-b5nbs
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..
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```
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### Route 100% traffic to v2 only when foo in Header is equal to bar
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```sh
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kubectl apply -f istio-virtualservice-conditional.yam
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```
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Access Test: Request to Gateway (Ingest)
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```sh
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while true; do curl -H "foo: bar" http://$GATEWAY_URL/hello; sleep 1; done
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Hello version: v2, instance: helloworld-green-6b8b6b674d-b5nbs
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Hello version: v2, instance: helloworld-green-6b8b6b674d-b5nbs
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Hello version: v2, instance: helloworld-green-6b8b6b674d-b5nbs
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Hello version: v2, instance: helloworld-green-6b8b6b674d-b5nbs
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Hello version: v2, instance: helloworld-green-6b8b6b674d-b5nbs
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Hello version: v2, instance: helloworld-green-6b8b6b674d-b5nbs
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Hello version: v2, instance: helloworld-green-6b8b6b674d-b5nbs
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Hello version: v2, instance: helloworld-green-6b8b6b674d-b5nbs
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Hello version: v2, instance: helloworld-green-6b8b6b674d-b5nbs
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Hello version: v2, instance: helloworld-green-6b8b6b674d-b5nbs
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Hello version: v2, instance: helloworld-green-6b8b6b674d-b5nbs
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Hello version: v2, instance: helloworld-green-6b8b6b674d-b5nbs
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Hello version: v2, instance: helloworld-green-6b8b6b674d-b5nbs
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Hello version: v2, instance: helloworld-green-6b8b6b674d-b5nbs
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...
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```
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## Delete Projects
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Delete all Virtual Services
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```sh
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$ kubectl get virtualservice
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NAME AGE
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bookinfo 1d
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helloworld 21m
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$ kubectl delete virtualservice helloworld
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```
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Delete all Destination Rules
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```sh
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$ kubectl get destinationrule
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NAME AGE
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helloworld 48m
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$ kubectl delete destinationrule helloworld
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```
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Delete all Ingress Gateway
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```sh
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$ kubectl get gateway
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NAME AGE
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bookinfo-gateway 1d
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helloworld-gateway 49m
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$ kubectl delete gateway helloworld-gateway
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```
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Delete all deployments
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```
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kubectl delete -f helloworld-v1.yaml
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kubectl delete -f helloworld-v2.yaml
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```
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## Misc Istio Commands - istioctl
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Get all proxy status
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```sh
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$ istioctl proxy-status
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Stderr when execute [/usr/local/bin/pilot-discovery request GET /debug/syncz ]: gc 1 @0.011s 9%: 0.026+1.2+1.2 ms clock, 0.053+0.26/0.10/1.0+2.4 ms cpu, 4->4->2 MB, 5 MB goal, 2 P
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gc 2 @0.022s 11%: 0.007+1.3+1.2 ms clock, 0.014+0.15/0.36/1.1+2.4 ms cpu, 4->4->2 MB, 5 MB goal, 2 P
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PROXY CDS LDS EDS RDS PILOT VERSION
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details-v1-6764bbc7f7-sdc7m.default SYNCED SYNCED SYNCED (98%) SYNCED istio-pilot-864dc8c497-pmzl2 1.0.2
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istio-egressgateway-7cf89fb4f7-g4flm.istio-system SYNCED SYNCED SYNCED (98%) NOT SENT istio-pilot-864dc8c497-pmzl2 1.0.2
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istio-ingressgateway-6996d566d4-spxkz.istio-system SYNCED SYNCED SYNCED (98%) SYNCED istio-pilot-864dc8c497-pmzl2 1.0.2
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productpage-v1-54b8b9f55-gthrr.default SYNCED SYNCED SYNCED (98%) SYNCED istio-pilot-864dc8c497-pmzl2 1.0.2
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ratings-v1-7bc85949-vcnlw.default SYNCED SYNCED SYNCED (100%) SYNCED istio-pilot-864dc8c497-pmzl2 1.0.2
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reviews-v1-fdbf674bb-ddw9w.default SYNCED SYNCED SYNCED (98%) SYNCED istio-pilot-864dc8c497-pmzl2 1.0.2
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reviews-v2-5bdc5877d6-tjgmg.default SYNCED SYNCED SYNCED (100%) SYNCED istio-pilot-864dc8c497-pmzl2 1.0.2
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reviews-v3-dd846cc78-9lldp.default SYNCED SYNCED SYNCED (98%) SYNCED istio-pilot-864dc8c497-pmzl2 1.0.2
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```

‎kubernetes-manifests/istio/helloworld/req-loop.sh‎

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#!/bin/sh
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GATEWAY_URL=$(kubectl get svc istio-ingressgateway -n istio-system -o 'jsonpath={.status.loadBalancer.ingress[0].ip}'):$(kubectl get svc istio-ingressgateway -n istio-system -n istio-system -o 'jsonpath={.spec.ports[0].targetPort}')
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while true;
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do
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curl http://<GATEWAY_URL>/hello
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#curl -H "foo: bar" http://<GATEWAY_URL>/hello
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curl http://$GATEWAY_URL/hello
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#curl -H "foo: bar" http://$GATEWAY_URL/hello
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sleep 1
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done
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