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feat: support urlrewrite filter for individual backends#7826

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jukie merged 4 commits intoenvoyproxy:mainfrom
MUzairS15:MUzairS15/feat/support-host-rewrite-for-backend
Dec 29, 2025
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feat: support urlrewrite filter for individual backends#7826
jukie merged 4 commits intoenvoyproxy:mainfrom
MUzairS15:MUzairS15/feat/support-host-rewrite-for-backend

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@MUzairS15 MUzairS15 commented Dec 26, 2025

What type of PR is this?

feat: support urlrewrite filter for individual backends

What this PR does / why we need it:
Enable URLRewrite filter on individual backendRefs in HTTPRoute configuration. Each backend can now have its own host rewrite
applied via Envoy's WeightedCluster.ClusterWeight.host_rewrite_literal.

"clusters": [
          {
            "hostRewriteLiteral": "rewritten-host-a.example.com",
            "name": "httproute/default/weighted-host-rewrite/rule/0/backend/0",
            "weight": 50
          },
          {
            "hostRewriteLiteral": "rewritten-host-b.example.com",
            "name": "httproute/default/weighted-host-rewrite/rule/0/backend/1",
            "weight": 50
          }
}

Tested via echo server with envoy-gateway exposed on localhost:10000:

curl  http://localhost:10000/test -H "host: test.gw"
{"host":{"hostname":"rewritten-host-b.example.com"}}

Which issue(s) this PR fixes:

Fixes #7775

Release Notes: Yes/No

@MUzairS15 MUzairS15 requested a review from a team as a code owner December 26, 2025 18:20
@MUzairS15
feat: support urlrewrite filter for individual backends
f1174c6 
Signed-off-by: MUzairS15 <muzair.shaikh810@gmail.com>
@MUzairS15
update release notes
0a34a62 
Signed-off-by: MUzairS15 <muzair.shaikh810@gmail.com>
@MUzairS15 MUzairS15 force-pushed the MUzairS15/feat/support-host-rewrite-for-backend branch from b9aa9c7 to 0a34a62 Compare December 26, 2025 18:26
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codecov bot commented Dec 26, 2025 •
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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 72.75%. Comparing base (122b4bf) to head (2eff6aa).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files 
@@            Coverage Diff             @@
##             main    #7826      +/-   ##
==========================================
+ Coverage   72.67%   72.75%   +0.08%     
==========================================
  Files         235      235              
  Lines       35035    35043       +8     
==========================================
+ Hits        25460    25496      +36     
+ Misses       7760     7737      -23     
+ Partials     1815     1810       -5

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arkodg
arkodg previously approved these changes Dec 26, 2025
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LGTM thanks

@arkodg arkodg requested review from a team December 26, 2025 21:34
zirain
zirain previously approved these changes Dec 27, 2025
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zirain commented Dec 27, 2025

@MUzairS15 can you fix the conflict?

@jukie
Merge branch 'main' into MUzairS15/feat/support-host-rewrite-for-backend
2eff6aa 
Signed-off-by: Isaac Wilson <10012479+jukie@users.noreply.github.com>
@jukie jukie dismissed stale reviews from zirain and arkodg via 2eff6aa December 27, 2025 23:12
@jukie jukie requested review from arkodg and zirain December 27, 2025 23:12
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MUzairS15 commented Dec 28, 2025

/retest

@jukie jukie merged commit f8bb912 into envoyproxy:main Dec 29, 2025
71 of 78 checks passed
millermatt pushed a commit to millermatt/envoy-gateway that referenced this pull request Jan 4, 2026
@MUzairS15 @jukie @millermatt
feat: support urlrewrite filter for individual backends (envoyproxy#7826
057993b 
)

* feat: support urlrewrite filter for individual backends

Signed-off-by: MUzairS15 <muzair.shaikh810@gmail.com>

* update release notes

Signed-off-by: MUzairS15 <muzair.shaikh810@gmail.com>

---------

Signed-off-by: MUzairS15 <muzair.shaikh810@gmail.com>
Signed-off-by: Isaac Wilson <10012479+jukie@users.noreply.github.com>
Co-authored-by: Isaac Wilson <10012479+jukie@users.noreply.github.com>
Signed-off-by: Matt Miller <millermatt@outlook.com>
@aneesh-wolt aneesh-wolt mentioned this pull request Jan 19, 2026
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aneesh-wolt commented Jan 27, 2026

I see v1.6.3 is released. This feature isn't included?

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@zirain zirain zirain approved these changes

@jukie jukie jukie approved these changes

@arkodg arkodg Awaiting requested review from arkodg

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Modify header for backenRefs

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