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  1. OpenShift Bugs
  2. OCPBUGS-16623

OpenShift Router still sends traffic to its only backend when weight is 0

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    • Sprint 239, Sprint 240
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      * Previously, the OpenShift Router directed traffic to a route with a weight of `0` when it had only one back end. With this update, the router will not send traffic to routes with a single backend with weight `0`. (link:https://issues.redhat.com/browse/OCPBUGS-16623[*OCPBUGS-16623*])
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      * Previously, the OpenShift Router directed traffic to a route with a weight of `0` when it had only one back end. With this update, the router will not send traffic to routes with a single backend with weight `0`. (link: https://issues.redhat.com/browse/OCPBUGS-16623 [* OCPBUGS-16623 *])
    • Bug Fix
    • Done

    Description

      Description of problem:

      per oc set route-backends -h output:
Routes may have one or more optional backend services with weights controlling how much traffic flows to each service.
[...]
**If all weights are zero the route will not send traffic to any backends.**

this is not the case anymore for a route with a single backend.

      Version-Release number of selected component (if applicable):

      at least from OCP 4.12 onward

      How reproducible:

      all the time

      Steps to Reproduce:

      1. kubectl create -f example/
2. kubectl patch route example -p '{"spec":{"to": {"weight": 0}}}' --type merge
3. curl http://localhost -H "Host: example.local"

      Actual results:

      curl succeeds

      Expected results:

      curl fails

      Additional info:

      https://access.redhat.com/support/cases/#/case/03567697

      is regression following NE-822. Reverting
      https://github.com/openshift/router/commit/9656da7d5e2ac0962f3eaf718ad7a8c8b2172cfa makes it work again.

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          Bug - A problem that impairs or prevents the functions of the product. OCPBUGS-17107 OpenShift Router still sends traffic to its only backend when weight is 0

          • Major - To be worked after higher priority work items are addressed. When the severity is high and the effort to change it is low to moderate, this term is chosen. Issues in this category likely have an existing workaround but implementation or execution may be non-trivial.
          • Closed
          is cloned by

          Bug - A problem that impairs or prevents the functions of the product. OCPBUGS-17107 OpenShift Router still sends traffic to its only backend when weight is 0

          • Major - To be worked after higher priority work items are addressed. When the severity is high and the effort to change it is low to moderate, this term is chosen. Issues in this category likely have an existing workaround but implementation or execution may be non-trivial.
          • Closed
          links to

          GitHub openshift/router#499: OCPBUGS-16623: properly handle weight=0

          Web Link RHSA-2023:5006 OpenShift Container Platform 4.14.z security update

          Activity

            People

              gspence@redhat.com Grant Spence
              frigault Francois Rigault
              Shudi Li Shudi Li
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                Created:
                Updated:
                Resolved: