 (names used for testing) should always resolve to the respective regions.</p><h2 id=contextual-configuration>Contextual Configuration</h2><p>After further investigation, it was apparent that configuration needed to be contextual: each cluster needs a configuration specifically tailored for its view of the world.</p><p>For example, we have a payments service consumed by orders and reports. The payments service has a HA/DR deployment across <code>us-east</code> (cluster 3) and <code>us-west</code> (cluster 2