Any number of namespaces are supported within a cluster, each logically separated from others but with the ability to communicate with each other. Namespaces cannot be nested within each other.You can have multiple namespaces inside a single Kubernetes cluster, and they are all logically isolated from each other. They can help you and your teams with organization, security, and even performance!There is no limit on number of namespaces. You can create as many as you want. It doesn't actually consume cluster resources like cpu, memory etc.
How do I get all namespaces in a cluster : To list one or more namespaces by name in your Kubernetes cluster, you can use the kubectl get namespaces command as follows: $ kubectl get namespaces <namespace_name …>
Can you have multiple namespaces
We can use multiple namespaces in a single program. Multiple namespaces are especially useful when writing large programs with many lines of code.
Can you have more than one namespace : Multiple namespace blocks with the same name are allowed. All declarations within these blocks are declared in the same namespace scope.
When to Use Multiple Namespaces. Namespaces are intended for use in environments with many users spread across multiple teams, or projects. For clusters with a few to tens of users, you should not need to create or think about namespaces at all. Start using namespaces when you need the features they provide.
Namespaces are a way to divide cluster resources between multiple users (via resource quota). If different teams or projects have isolated budgets (that is, reason to measure resource usage by team) then multiple namespaces enables that functionally.
Can I use multiple namespaces
We can use multiple namespaces in a single program. Multiple namespaces are especially useful when writing large programs with many lines of code.A namespace can contain another namespace. It is called nested namespace. The nested namespace and its members can also be accessed using the dot (.) operator.