Install and configure a cluster with the Istio on GKE Add-On
Deploy Bookinfo, an Istio-enabled multi-service application
Installing the Istio on GKE Add-On with Kubernetes Engine
Istio is an open source framework for connecting, securing, and managing microservices. It can be used with any services, including but not limited to services that are hosted in a Kubernetes cluster. Istio lets you create a network of deployed services with load balancing, service-to-service authentication, monitoring, and more, without requiring any changes in service code.
You add Istio support to services by deploying a special Envoy sidecar proxy to each of your application's pods in your environment. Sidecar means that it gets deployed alongside your application, and your application interacts with the outside world, both ingress and egress, through the Envoy Proxy. Developers of applications can take advantage of the communication and networking enhancements provided by Envoy - like client-side load balancing, circuit breakers, logging, mTLS, etc. - without additional coding, and without finding the libraries in the language of choice.
As one example - in reliable distributed systems, it's common for a system to want to retry a request after a failure, possibly with an exponential backoff delay. There are libraries for Java, Golang and NodeJS that do this. However, employing them within the app means each different app will need to solve that problem independently. The Istio sidecar could do this for the app, automatically.
Because of the proximity of the sidecar to the application, there's no significant latency when communicating between them.
Istio on GKE Add-On
Istio on GKE is an add-on for GKE that lets you quickly create a cluster with all the components you need to create and run an Istio service mesh, in a single step. Once installed, your Istio control plane components are automatically kept up-to-date, with no need for you to worry about upgrading to new versions. You can also use the add-on to install Istio on an existing cluster.
For more information about the Istio on GKE Add-On, see the Istio on GKE documentation. You can learn which Istio core components are installed with the Add-On, and how the Istio lifecycle is managed as part of the GKE upgrade process.
In this lab, you will learn how to perform the following tasks:
- Provision a cluster on Google Kubernetes Engine (GKE).
- Install and configure the Istio on GKE Add-On, which includes the Istio control-plane and a method to deploy Envoy proxies as sidecars.
- Deploy Bookinfo, an Istio-enabled multi-service application.
- Enable external access using an Istio Ingress Gateway.
- Use the Bookinfo application.
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