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  1. OpenShift Bugs
  2. OCPBUGS-20024

Excessive TopologyAwareHintsDisabled events due to service/dns-default with topology aware hints activated.

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    • Sprint 243, Sprint 244, Sprint 245, Sprint 246, Sprint 247, Sprint 248, Sprint 249
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    Description

      Kube 1.26 introduced the warning level TopologyAwareHintsDisabled event. TopologyAwareHintsDisabled is fired by the EndpointSliceController whenever reconciling a service that has activated topology aware hints via the service.kubernetes.io/topology-aware-hints annotation, but there is not enough information in the existing cluster resources (typically nodes) to apply the topology aware hints.

      When re-basing OpnShift onto Kube 1.26, are CI builds are failing (except on AWS), because these events are firing "pathologically", for example:

      : [sig-arch] events should not repeat pathologically
        events happened too frequently event happened 83 times, something is wrong: ns/openshift-dns service/dns-default - reason/TopologyAwareHintsDisabled Insufficient Node information: allocatable CPU or zone not specified on one or more nodes, addressType: IPv4 result=reject 

      AWS nodes seem to have the proper values in the nodes. GCP has the values also, but they are not "right" for the purposes of the EndpointSliceController:

      event happened 38 times, something is wrong: ns/openshift-dns service/dns-default - reason/TopologyAwareHintsDisabled Unable to allocate minimum required endpoints to each zone without exceeding overload threshold (5 endpoints, 3 zones), addressType: IPv4 result=reject }

      https://github.com/openshift/origin/pull/27666 will mask this problem (make it stop erroring in CI) but changes still need to be made in the product so end users are not subjected to these events.

      Now links to:

      [sig-arch] events should not repeat pathologically for ns/openshift-dns

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              mmasters1@redhat.com Miciah Masters
              lusanche@redhat.com Luis Sanchez
              Melvin Joseph Melvin Joseph
              Devan Goodwin, Miciah Masters
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                Updated: