the UK’s largest digital automotive marketplace.</p><p>The IT estate that supports Auto Trader UK is vast. Today, they manage around 50 customer-facing applications backed by about 400 microservices that process over 30,000 requests per second. Their infrastructure runs on Google Kubernetes Engine (GKE) and utilizes the Istio service mesh. As a major Istio success story, Auto Trader UK has received plenty of attention for its migration to public cloud since 2018.</p><h2 id=challenge>Challenge</h2><p>Chang