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A Cloud Guru

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

Level

Advanced

Duration

1h 0m

Published

Apr 05, 2019

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 https://github.com/istio/istio/releases/download/1.0.6/istio-1.0.6-linux.tar.gz

[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
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
```

Author

A Cloud Guru

The Cloud Content team comprises subject matter experts hyper focused on services offered by the leading cloud vendors (AWS, GCP, and Azure), as well as cloud-related technologies such as Linux and DevOps. The team is thrilled to share their knowledge to help you build modern tech solutions from the ground up, secure and optimize your environments, and so much more!

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