Cannot apply resources with defined namespaces in manifest

Repro steps:

• Obtain a manifest with defined namespaces (e.g. cert-manager, ingress-nginx)
  • https://github.com/jetstack/cert-manager/releases/download/v1.6.1/cert-manager.yaml
  • https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v1.1.0/deploy/static/provider/cloud/deploy.yaml
• Add k8s-deploy step that deploys to kubernetes and commit, do not specify a namespece

Current behaviour:

• Kubernetes deployment fails

Error: the namespace from the provided object "kube-system" does not match the namespace "cert-manager". You must pass '--namespace=kube-system' 

Error: the namespace from the provided object "ingress-nginx" does not match the namespace "default". You must pass '--namespace=ingress-nginx'

Expected behaviour:

• k8s-deploy should not pass namespace=default parameter to kubectl if namespace is not defined in github action

The reasoning is, official instructions for ingress-nginx, cert-manager and others do not need a namespace parameter in kubectl, and if namespace=default is passed, the command fails. I have to split the manifests into multiple manifests per each namespace as a workaround.

[hansmbakker]

Thank you both and thank you @jaiveerk for the explanation!

[OliverMKing]

@hansmbakker we will keep you updated on this. We are working on a fix.