[v1.18] lb: Implement Hybrid-DSR via annotation infrastructure#43056
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julianwiedmann merged 1 commit intov1.18from Dec 2, 2025
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[v1.18] lb: Implement Hybrid-DSR via annotation infrastructure#43056julianwiedmann merged 1 commit intov1.18from
julianwiedmann merged 1 commit intov1.18from
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[ upstream commit 0360502 ] [ backporter's notes: remove wildcard entries in the test, they don't exist on v1.18. ] Re-implement Hybrid-DSR mode to use the same flag-based mechanism as annotation mode, eliminating duplicate datapath logic. Changes: - Update ToSVCForwardingMode() to accept optional protocol parameter - For LBModeHybrid, return DSR mode for TCP (proto 6), SNAT otherwise - Pass protocol to ToSVCForwardingMode() in BPF reconciler - Add tests to demonstrate that we're producing the expected frontend entries. This allows the control plane to set SVC_FLAG_FWD_MODE_DSR on a per-frontend basis for TCP services in Hybrid mode, while the datapath uses the same flag-checking logic for all selective DSR modes. Signed-off-by: saiaunghlyanhtet <saiaunghlyanhtet2003@gmail.com> Signed-off-by: Julian Wiedmann <jwi@isovalent.com>
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saiaunghlyanhtet
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Dec 1, 2025
dylandreimerink
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Dec 2, 2025
This was referenced Mar 12, 2026
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To ensure smooth upgrades to
v1.19, this picks up the controlplane change from #42788. This way all service map entries have a validDSR yes/noflag, and the datapath can trust the flag whenever thev1.19programs start to roll out.