According to the ingress nginx controller doc, it remind the object will use the ingress-nginx namespace, and can change to other namespace with --watch-namespace tag.
But when I using
kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/nginx0.28.0/deploy/static/provider/aws/service-l7.yaml --watch-namespace=defaultIt report
Error: unknown flag: --watch-namespace
See 'kubectl apply --help' for usage.
You are messing up with one flag with others. By default following command will deploy the controller in ingress-nginx namespace. But you want it to be in some other namespace like default. To do so, you need to pass kubectl's flag like -n or --namespace.
$ kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/nginx0.28.0/deploy/static/provider/aws/service-l7.yaml --namespace defaultNB:
--watch-namespace is a flag of nginx-ingress-controller. It is used while running the binary inside the container. It needs to be set from deployment.spec.contianers[].args[]. It is used to bind the controller's watch in a single k8s namespace(by default it watches objects of all namespaces).
You need to set --watch-namespace in the args section of nginx ingress controller deployment yaml
args:
- /nginx-ingress-controller
- --configmap=$(POD_NAMESPACE)/$(NGINX_CONFIGMAP_NAME)
- --tcp-services-configmap=$(POD_NAMESPACE)/$(TCP_CONFIGMAP_NAME)
- --udp-services-configmap=$(POD_NAMESPACE)/$(UDP_CONFIGMAP_NAME)
- --publish-service=$(POD_NAMESPACE)/$(SERVICE_NAME)
- --annotations-prefix=nginx.ingress.kubernetes.io
- --watch-namespace=namespace
https://github.com/kubernetes/ingress-nginx/blob/master/deploy/cloud-generic/deployment.yaml