Backport of Inline API Gateway TLS cert code into release/1.15.x#16306
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* Include secret type when building resources from config snapshot * First pass at generating envoy secrets from api-gateway snapshot * Update comments for xDS update order * Add secret type + corresponding golden files to existing tests * Initialize test helpers for testing api-gateway resource generation * Generate golden files for new api-gateway xDS resource test * Support ADS for TLS certificates on api-gateway * Configure TLS on api-gateway listeners * Inline TLS cert code * update tests * Add SNI support so we can have multiple certificates * Remove commented out section from helper * regen deep-copy * Add tcp tls test --------- Co-authored-by: Nathan Coleman <nathan.coleman@hashicorp.com>
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Backport
This PR is auto-generated from #16295 to be assessed for backporting due to the inclusion of the label backport/1.15.
WARNING automatic cherry-pick of commits failed. Commits will require human attention.
The below text is copied from the body of the original PR.
Description
We initially attempted to ship API Gateway certificates via SDS secrets over ADS, however, currently certificates pushed down via ADS never come out of a warming state. This acts as a stop-gap to try and ship certificates to API Gateways without requiring having a fully functioning ADS secret pushdown.
In order to implement binding multiple certificates to a gateway listener it adds some SNI behavior to the gateways, specifically the xDS generation code, when applying a single certificate leverages it for all traffic. For multiple certificates it:
The above overlapping check to a default listener was done to make things deterministic rather than based off of something like which cert was created first.
In the future I think we should talk to the upstream community about the possibility of either adding an optional flag for a certificate to be the
defaultcertificate, or potentially adding an optionalhostnamesfield to the certificate references so that an implementation can just leverage that rather than trying to construct a non-overlapping hostnames set themselves, or both (this is a generic multi-cert problem).PR Checklist
Overview of commits