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  • re2-prod-supervisor-ndots-override 496ac78484
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    feat(supervisor): optional ndots override for runner pods (#3441)

    frostbyte_neo 发布于 2026-04-24 11:05:55 +00:00

    Adds KUBERNETES_POD_DNS_NDOTS_OVERRIDE_ENABLED flag (off by default)
    that overrides the cluster default and sets dnsConfig.options.ndots on
    runner pods (defaulting to 2, configurable via
    KUBERNETES_POD_DNS_NDOTS).

    Kubernetes defaults pods to ndots: 5, so any name with fewer than 5
    dots, including typical external domains like api.example.com, is
    first walked through every entry in the cluster search list
    (<ns>.svc.cluster.local, svc.cluster.local, cluster.local) before
    being tried as-is, turning one resolution into 4+ CoreDNS queries (×2
    with A+AAAA).

    Using a lower ndots value reduces DNS query amplification in the
    cluster.local zone.

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