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OVHcloud + Kubernetes: "DNSConfigForming" "Nameserver limits were exceeded" warnings on fresh 3-AZ clusters
Marco Borm Marco Borm
2 min
DE | EN
dns /
kubernetes /
ovhcloud

OVHcloud + Kubernetes: "DNSConfigForming" "Nameserver limits were exceeded" warnings on fresh 3-AZ clusters

Symptoms#

On 12 March 2026, I noticed that a “factory-fresh” OVHcloud 3-AZ Kubernetes cluster kept producing the following warnings:

kube-system   2m42s       Warning   DNSConfigForming   pod/cilium-fzc5z                           Nameserver limits were exceeded, some nameservers have been omitted, the applied nameserver line is: 213.186.33.99 1.1.1.1 8.8.8.8
kube-system   2m6s        Warning   DNSConfigForming   pod/cilium-envoy-g5p2h                     Nameserver limits were exceeded, some nameservers have been omitted, the applied nameserver line is: 213.186.33.99 1.1.1.1 8.8.8.8
kube-system   66s         Warning   DNSConfigForming   pod/cilium-operator-7d9cf667d8-dctk7       Nameserver limits were exceeded, some nameservers have been omitted, the applied nameserver line is: 213.186.33.99 1.1.1.1 8.8.8.8
kube-system   61s         Warning   DNSConfigForming   pod/coredns-58886b47ff-b4g76               Nameserver limits were exceeded, some nameservers have been omitted, the applied nameserver line is: 213.186.33.99 1.1.1.1 8.8.8.8
kube-system   57s         Warning   DNSConfigForming   pod/cilium-6w5k4                           Nameserver limits were exceeded, some nameservers have been omitted, the applied nameserver line is: 213.186.33.99 1.1.1.1 8.8.8.8
kube-system   43s         Warning   DNSConfigForming   pod/ovhcloud-apiserver-proxy-9pwkh         Nameserver limits were exceeded, some nameservers have been omitted, the applied nameserver line is: 213.186.33.99 1.1.1.1 8.8.8.8
kube-system   11s         Warning   DNSConfigForming   pod/coredns-58886b47ff-rwplp               Nameserver limits were exceeded, some nameservers have been omitted, the applied nameserver line is: 213.186.33.99 1.1.1.1 8.8.8.8
kube-system   5s          Warning   DNSConfigForming   pod/ovhcloud-apiserver-proxy-4lbhm         Nameserver limits were exceeded, some nameservers have been omitted, the applied nameserver line is: 213.186.33.99 1.1.1.1 8.8.8.8
kube-system   3s          Warning   DNSConfigForming   pod/cilium-envoy-tbqzg                     Nameserver limits were exceeded, some nameservers have been omitted, the applied nameserver line is: 213.186.33.99 1.1.1.1 8.8.8.8

On 23 March 2026, OVHcloud support told me the following:

This is a known issue on our side. We already prepared a fix which will be uploaded next month.

Apparently there is no good way to discover known problems like this in advance, which is also one of the reasons for this blog.

Timeline#

  • 12.03.2026

    First ticket created: on a freshly created 3-AZ Kubernetes cluster, continuous DNSConfigForming warnings appeared.

  • 19.03.2026

    Second ticket created, because the first one had been classified by the ticket system as "Information" and "Low Priority".

  • 23.03.2026

    OVHcloud support confirmed that this is a known issue on their side. A fix is planned to be rolled out starting in April.

About the Author Marco Borm

Marco Borm

Founder of the software company sekskant based in Hoppegarten near Berlin. 26 years of professional experience as a team lead, developer, and bridge between customers, product management and software engineering.

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