Fix attaching of HTTPRoutes to Gateway Listeners #1275
Merged
+543
−209
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
sjberman
reviewed
Nov 21, 2023
bjee19
approved these changes
Nov 27, 2023
sjberman
approved these changes
Nov 27, 2023
pleshakov
force-pushed
the
fix/attached-routes
branch
from
fd1059b
to
53f1563
Compare
Problem: - Rules for traffic attachment of HTTPRoutes to Gateways were clarified in kubernetes-sigs/gateway-api#2396 -- successful attachment should depend only on parentRefs in an HTTPRoute and AllowedRoutes of a Listener, even if either or both of them are invalid. - The corresponding conformance test GatewayWithAttachedRoutes was added in kubernetes-sigs/gateway-api#2477 , which fails for NGINX Gateway Fabric. - NGINX Gateway Fabric will not try to attach an HTTPRoute to a Listener if either or both of them are invalid. Solution: - Make NGF compliant with the Gateway API and make the corresponding test pass. - Introduce Attachable fields for Listener and HTTPRoute types of the Graph in the graph package. - Update the validation logic: - NGF considers a Listener attachable if (a) its hostname is valid, (b) protocol is supported by NGF and (c) AllowedRoutes are valid. - NGF considers an HTTPRoute attachable if (d) its hostnames are valid. - Attach an HTTPRoute to a Listener if both are attachable. Note: (a), (b) and (d) are not mentioned in kubernetes-sigs/gateway-api#2396 However, they are necessary: For (b), NGF doesn't know how to attach to non-supported protocols like TCP. For (a), Listener hostname needed for HTTPRoute attaching, because it affects if an HTTPRoute can attach or not (per Gateway API spec). For (c), HTTPRoute hostnames are also needed, because they affect if an HTTPRoute can attach or not per Gateway API spec). See https://github.com/kubernetes-sigs/gateway-api/blob/52c2994ed9de1c287a37465490b91cfcf01bf16e/apis/v1/httproute_types.go#L71-L73 Testing: - Unit tests are updated and extended - Failing conformance test GatewayWithAttachedRoutes now passes. CLOSES nginxinc#1148 Co-authored-by: Saylor Berman <s.berman@f5.com>
pleshakov
force-pushed
the
fix/attached-routes
branch
from
53f1563
to
44373bd
Compare
6 tasks
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Proposed changes
Problem:
Solution:
Note:
(a), (b) and (d) are not mentioned in
kubernetes-sigs/gateway-api#2396 However, they are necessary:
For (b), NGF doesn't know how to attach to non-supported protocols like TCP.
For (a), Listener hostname needed for HTTPRoute attaching, because it affects if an HTTPRoute can attach or not (per Gateway API spec). For (c), HTTPRoute hostnames are also needed, because they affect if an HTTPRoute can attach or not per Gateway API spec). See https://github.com/kubernetes-sigs/gateway-api/blob/52c2994ed9de1c287a37465490b91cfcf01bf16e/apis/v1/httproute_types.go#L71-L73
Testing:
CLOSES #1148
Checklist
Before creating a PR, run through this checklist and mark each as complete.