Jérôme Petazzoni • 11/19/2025

Patching CoreDNS configuration with Terraform on Kubernetes

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This technical guide details a method to update the CoreDNS configuration (Corefile) in a Kubernetes cluster provisioned with Terraform. It addresses the challenge of modifying resources not originally created by Terraform, using the kubernetes_config_map_v1_data resource to patch the existing ConfigMap for automation and integration with infrastructure-as-code workflows.

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#Kubernetes #Infrastructure As Code #Terraform

Patching CoreDNS configuration with Terraform on Kubernetes

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