Supporting Your Migration with Istio

This solution tutorial demonstrates how to use a service mesh, Istio to gradually migrate services from a "legacy" environment to a modern, cloud-native one.

Please refer to the following articles for the steps to run the code:

• Tutorial
• Concept

Contents of this repository

Example Workload

The Bookinfo app is used as a test workload to gradually migrate to Kubernetes.

It's available for two different deployment methods:

• Docker Compose (in the compose directory)
• Kubernetes (in the kubernetes/bookinfo directory)

Service Mesh Routing Rules

The kubernetes/bookinfo/istio directory contains:

• An Istio Gateway to expose services
• Istio ServiceEntries to register services running with Docker Compose to the mesh
• Various VirtualServices to configure routing either to instances running with Docker Compose (-vm suffix), to Kubernetes (-gke suffix) or to both (-split suffix)

Additional Services

• A Service to expose KubeDNS so workloads not running in Kubernetes can resolve internal names
• An Istio Gateway and VirtualService to expose Kiali (used to visualize the service mesh)