Note that network policies can optionally be utilized to control access between namespaces. To access the payroll service in the production namespace you would use: For example, to access the payroll service in the development namespace you would use the address Simply adding the namespace name to the service name provides access to services in any namespace on the cluster. Kubernetes DNS service directory can easily locate any service by its name by using the expanded form of DNS addressing:
How can pods communicate across Kubernetes namespaces?Īlthough namespaces are separate from each other, they can easily communicate with each other. This can reduce latency and speed overall application performance for each application running on the cluster. If a cluster is separated into multiple namespaces for different projects, the Kubernetes API will have fewer items to search when performing operations. Performance. Using namespaces can help improve performance of a given cluster.This can ensure that every project or namespace has the resources it needs to run, and that no one namespace is hogging all available resources. Resource Control. Policy-driven resource limits can be set on namespaces by defining resource quotas for CPU or memory utilization.This can ensure that only authorized users have access to resources in a given namespace.
Permissions. Namespaces enable the use of Kubernetes RBAC, so teams can define roles that group lists of permissions or abilities under a single name.
#WHAT IS KUBERNETES PODS CODE#
This ensures production code is not affected by changes that developers or testers make in their own namespaces throughout the application lifecycle.
Isolation. Large or growing teams can use namespaces to isolate their projects and microservices from each other.However, there are many useful benefits to having multiple namespaces, including: This is particularly relevant if there is no need to isolate developers or users from each other. Small teams or smaller organizations may be perfectly content using the default namespace.