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Istio in Kubernetes

In this hands-on lab, we will be installing and configuring Istio in Kubernetes. Once it's installed, we will deploy an application and do some basic routing.

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Path Info

Clock icon Advanced
Clock icon 1h 0m
Clock icon Apr 05, 2019

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Table of Contents

  1. Challenge

    Deploy Istio into a Kubernetes Cluster and Deploy the bookinfo Application

    Get the Istio installation package onto the Kube Master and unpack it:

    [cloud_user@km]$ wget
    [cloud_user@km]$ tar -xvf istio-1.0.6-linux.tar.gz

    Add istioctl to our path:

    [cloud_user@km]$ export PATH=$PWD/istio-1.0.6/bin:$PATH

    Set Istio to NodePort at port 30080:

    [cloud_user@km]$ sed -i 's/LoadBalancer/NodePort/;s/31380/30080/' ./istio-1.0.6/install/kubernetes/istio-demo.yaml

    Bring up the Istio control plane:

    [cloud_user@km]$ kubectl apply -f ./istio-1.0.6/install/kubernetes/istio-demo.yaml

    Verify that the control plane is running:

    [cloud_user@km]$ kubectl -n istio-system get pods

    When all of the pods are up and running (which we can verify by running that command again) we can move on.

    Install the bookinfo application with manual sidecar injection:

    [cloud_user@km]$ kubectl apply -f <(istioctl kube-inject -f istio-1.0.6/samples/bookinfo/platform/kube/bookinfo.yaml)

    Verify that the application is running and that there are 2 containers per pod:

    [cloud_user@km]$ kubectl get pods

    Ignore the busybox pod, that's part of the environment.

    Once everything is running, let's create an ingress and virtual service for the application:

    [cloud_user@km]$ kubectl apply -f istio-1.0.6/samples/bookinfo/networking/bookinfo-gateway.yaml

    Verify the page loads at the uri http://<kn1_IP ADDRESS>:30080/productpage

  2. Challenge

    Verify That Routing Rules Are Working by Configuring the Application to Route to `v1` Then `v2` of the `reviews` Backend Service

    Set the default destination rules:

    [cloud_user@km]$ kubectl apply -f istio-1.0.6/samples/bookinfo/networking/destination-rule-all.yaml

    Route all traffic to version 1 of the application and verify that it is working:

    [cloud_user@km]$ kubectl apply -f istio-1.0.6/samples/bookinfo/networking/virtual-service-all-v1.yaml

    Update the virtual service file to point to version 2 of the service and verify that it is working. Edit istio-1.0.6/samples/bookinfo/networking/virtual-service-all-v1.yaml (using whatever text editor you like) and change this:

    - destination:
            host: reviews
            subset: v1

    to this:

    - destination:
            host: reviews
            subset: v2

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