how to change envoy configuration dynamically

Question

I have a kubernetes cluster with 3 node and 3 envoy, I want to change envoy configuration, without losing connection, what is the best solution ???

Answer 1

Envoy as an intermediate L7 proxy manager, brings a lot of features and benefits that could probably simplify a general micro services design. Despite the fact that Envoy offers Static bootstrap configuration, it worth to mentioned about Dynamic configuration, leveraging a mechanism of auto-discovering configuration settings.

Here are the list of APIs supported dynamic configuration:

• Endpoint Discovery Service (EDS) API;
• Cluster Discovery Service (CDS);
• Route Discovery Service (RDS);
• Listener Discovery Service (LDS);
• Secret Discovery Service (SDS).

For instance, as long as you wish to setup discovery service for Route resource you might probaly look at RDS; Clusters, Listeners and Endpoints: CDS, LDS, and EDS respectively.

Appreciate @Kamol Hasan for his efforts and the good links on the related materials to this topic.