Integrating Virtual Machines

This sample deploys the Bookinfo services across Kubernetes and a set of Virtual Machines, and illustrates how to use Istio service mesh to control this infrastructure as a single mesh.

Note: this guide is still under development and only tested on Google Cloud Platform. On IBM Bluemix or other platforms where overlay network of Pods is isolated from VM network, VMs cannot initiate any direct communication to Kubernetes Pods even when using Istio.

Overview

BookInfo Application with Istio Mesh Expansion
BookInfo Application with Istio Mesh Expansion

Before you begin

Running mysql on the VM

We will first install mysql on the VM, and configure it as a backend for the ratings service.

On the VM:

  sudo apt-get update && apt-get install ...
  # TODO copy or link the istio/istio test script

Registering the mysql service with the mesh

Machine admin

First step is to configure the VM sidecar, by adding the service port and restarting the sidecar.

On the DB machine:


  sudo echo "ISTIO_INBOUND_PORTS=..." > /var/lib/istio/envoy/sidecar.env
  sudo chown istio-proxy /var/lib/istio/envoy/sidecar.env
  sudo systemctl restart istio
 # Or
  db$ sudo istio-pilot vi /var/lib/istio/envoy/sidecar.env
  # add mysql port to the "ISTIO_INBOUND_PORTS" config

Cluster admin

If you previously run the mysql bookinfo on kubernetes, you need to remove the k8s mysql service:

  kubectl delete service mysql

Run istioctl to configure the service (on your admin machine):

  istioctl register mysql PORT IP

Note that the ‘db’ machine does not need and should not have special kubernetes priviledges.

Using the mysql service

The ratings service in bookinfo will use the DB on the machine. To verify it works, you can modify the ratings value on the database.

More details here soon. See the MySQL document in the meantime.