How to patch a ConfigMap in Kubernetes
Kubernetes ships with a ConfigMap called coredns that lets you specify DNS settings. I want to modify or patch a small piece of this configuration by adding: apiVersion: v1 kind: ConfigMap data: upstreamNameservers: | ["1.1.1.1", "1.0.0.1"] I know I can use kubectrl edit to edit the coredns ConfigMap is there some way I can take the above file containing only the settings I want to insert or update and have it merged on top of or patched over the existing ConfigMap ? The reason for this is that I want my deployment to be repeatable using CI/CD. So, even if I ran my Helm chart on a brand new