Home / Kong Mesh
Edit
Report

Configure Data Plane proxy membership

Uses: Kong Mesh
Related Documentation
Mesh Documentation
Related Resources
Data plane on Kubernetes
Data plane on Universal
Data plane proxy

Data plane proxy membership constraints let us define a set of rules that are executed when a data plane proxy is joining a mesh.

Constraints contains two lists:

  • Requirements - a data plane proxy has to fulfill at least one requirement to join a mesh.
  • Restrictions - a data plane proxy cannot fulfill any restriction to join a mesh.

Keep in mind that membership rules are enforced only on new data plane proxies. If we put rules that existing data plane proxies violate, we need to remove them manually from the mesh.

Usage 

apiVersion: kuma.io/v1alpha1
kind: Mesh
metadata:
  name: default
spec:
  constraints:
    dataplaneProxy:
      requirements:
      - tags: # set of required tags. You can specify '*' in value to require non-empty value of tag
          kuma.io/zone: east
      restrictions:
      - tags: # set of restricted tags. You can specify '*' in value to restrict tag with any value
          kuma.io/service: backend

Example use cases

Restrict which Pods in Kubernetes namespaces can join a Mesh 

apiVersion: kuma.io/v1alpha1
kind: Mesh
metadata:
  name: default
spec:
  constraints:
    dataplaneProxy:
      requirements:
      - tags:
          kuma.io/namespace: ns-1
      - tags:
          kuma.io/namespace: ns-2

By default, any Pod can join any mesh by changing its kuma.io/mesh annotation. We can restrict that by relying on autogenerated k8s.kuma.io/namespace tag. In this example, only data plane proxies from ns-1 and ns-2 can join a default mesh. If there is another mesh without any requirements, Pods from ns-1 and ns-2 namespaces can also join that mesh.

Enforce consistency of tags 

apiVersion: kuma.io/v1alpha1
kind: Mesh
metadata:
  name: default
spec:
  constraints:
    dataplaneProxy:
      requirements:
      - tags:
          team: '*'
          cloud: '*'
      restrictions:
      - tags:
          legacy: '*'

By using these constraints, we can enforce consistency of tags in Kong Mesh deployment. With the example above, every data plane proxy must have non-empty team and cloud tags and cannot have legacy tag.

Multizone mesh segmentation 

apiVersion: kuma.io/v1alpha1
kind: Mesh
metadata:
  name: default
spec:
  constraints:
    dataplaneProxy:
      requirements:
      - tags:
          kuma.io/zone: east
---
apiVersion: kuma.io/v1alpha1
kind: Mesh
metadata:
  name: demo
spec:
  constraints:
    dataplaneProxy:
      requirements:
        - tags:
            kuma.io/zone: west

This way, only data plane proxies from the east zone can join default mesh and only data plane proxies from the west zone can join demo mesh.

Something wrong?
Report an Issue | Edit this Page

Help us make these docs great!

Kong Developer docs are open source. If you find these useful and want to make them better, contribute today!
Contribute

Still need help

Ask in our Forum
Contact Support