[router] Warn on unknown retry_on policy tokens #45349
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Request (pr/45349/main@672337e)
672337e 
#45349 merge main@c4e3e8e
[router] Warn on unknown retry_on policy tokens
When an xDS retry_on config contains unrecognized tokens (e.g., typos like "5x" instead of "5xx"), Envoy previously accepted the config silently and discarded the unknown tokens without any indication.
This PR adds a rate-limited warning log at config ingestion listing any unrecognized tokens.Commit Message: [router] Warn on unknown retry_on policy tokens
Additional Description:
Risk Level: Low
Testing: Unit test
Docs Changes:
Release Notes:
Platform Specific Features:
Fixes #39470
Environment
Request variables
| Key | Value |
|---|---|
| ref | 4444399 |
| sha | 672337e |
| pr | 45349 |
| base-sha | c4e3e8e |
| actor | @nezdolik |
| message | [router] Warn on unknown retry_on policy tokens... |
| started | 1780057493.105185 |
| target-branch | main |
| trusted | false |
Build image
Container image/s (as used in this CI run)
| Key | Value |
|---|---|
| default | docker.io/envoyproxy/envoy-build:v0.1.5 |
| mobile | docker.io/envoyproxy/envoy-build:mobile-v0.1.5 |
Version
Envoy version (as used in this CI run)
| Key | Value |
|---|---|
| major | 1 |
| minor | 39 |
| patch | 0 |
| dev | true |
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