server: avoid selecting draining backends#821
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Track non-draining backend candidates for default and dest-host routing, and update the dest-host cache atomically with backend add/remove. Add tests for non-draining selection, lazy eviction, and draining fallback behavior. Signed-off-by: Imran Pochi <imranpochi@microsoft.com>
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[APPROVALNOTIFIER] This PR is APPROVED This pull-request has been approved by: ipochi The full list of commands accepted by this bot can be found here. The pull request process is described here DetailsNeeds approval from an approver in each of these files:
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/retest |
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@ipochi I fixed a bunch of problems on CI. I think if you rebase on the latest this should go better. |
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Track non-draining backend candidates so selection avoids scanning and
does not route new requests to draining backends when healthy choices
exist.