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squillace / istio-wasm-demo

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Istio WASM Demo

Prerequisites

  1. Install k3d
  2. Install istioctl
  3. Instal Helm
  4. Enable WASM Workloads in Docker Desktop (if applicable)

Demo

  1. k3d cluster create wasm-cluster --image ghcr.io/deislabs/containerd-wasm-shims/examples/k3d:v0.9.0 -p "8081:80@loadbalancer" --agents 2

  2. kubectl apply -f https://github.com/deislabs/containerd-wasm-shims/raw/main/deployments/workloads/runtime.yaml

  3. kubectl apply -f https://github.com/deislabs/containerd-wasm-shims/raw/main/deployments/workloads/workload.yaml

  4. Wait ~15 seconds for resources to be Ready

  5. curl -v http://127.0.0.1:8081/spin/hello

  6. Install Istio: istioctl install --set profile=default --skip-confirmation

  7. Install Prometheus with: kubectl apply -f https://raw.githubusercontent.com/istio/istio/release-1.19/samples/addons/prometheus.yaml

    1. Note: this is a demo prometheus install, not for production use

  8. Install Kiali: helm install --namespace istio-system --set auth.strategy="anonymous" --repo https://kiali.org/helm-charts kiali-server kiali-server

  9. Label the default namespace with istio-injection=enabled: kubectl label namespace default istio-injection=enabled

  10. Deploy WASM application YAML in this repo: kubectl apply -f ./product-api.yaml

    1. Notice that there are 2 Ready "containers" within the product-api pod. One of them is the Istio sidecar!

  11. Deploy the Istio sleep sample application: kubectl apply -f https://raw.githubusercontent.com/istio/istio/release-1.19/samples/sleep/sleep.yaml

  12. Start a loop to curl the product-api service from the sleep pod:

while true
do
kubectl exec -it deploy/sleep -- curl http://product-api:5001/v1-get-item-types
sleep 1
done
  1. In a separate terminal, port-forward the kiali service: kubectl port-forward svc/kiali 20001:20001 -n istio-system
  2. View the kiali graph (make sure to stretch out the range to >1min so the graph doesn't reset)

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