All objects are restricted to a single namespace. True or False?

ilmx

Can someone ellaborate on this? I think every object must be in a single namespace (default or any other) and cannot be in two namespaces at the same time. Is there an exception for this?

chrispokorni

Hi @ilmx,

The exception is/are the non-namespaced objects, that live clusterwide - visible to all namespaces. For a list of all namespaced and clusterwide objects, run the following command:

kubectl api-resources

For additional output, try the command with the -o wide flag.

Regards,
-Chris

spljaa

There are cluster wide resources, aren't there?
If some object is on namespace level then I haven't notice option to be multiple namespaces
ClusterRole would be one without namespace at all:
https://kubernetes.io/docs/reference/access-authn-authz/rbac/
I'm not native English, and my personal opinion is that such questions are hard to translate.
I would go with False answer as zero is not "single". However if object has an namespace attribute, then it is single...

ilmx

Thanks! I understand now.
It is a tricky question. All objects are restricted to a single namespace EXCEPT those that cannot belong to a namespace. Clear now.