BackendGroup CRD

Backend Groups

Backend Groups are an experimental feature aimed at simplifying the process of defining backends for VirtualNodes.

Enabling Backend Groups

To use Backend Groups, include the flag enableBackendGroups=true in your controller deployment.

BackendGroup Spec

A Backend Group defines a set of VirtualService backends that can be added to VirtualNodes.

Here is a sample spec with a Backend Group containing 3 VirtualServices. This group is applied to a VirtualNode.

apiVersion: appmesh.k8s.aws/v1beta2
kind: BackendGroup
metadata:
  name: color-group
  namespace: ${APP_NAMESPACE}
spec:
  virtualservices:
    - name: green
      namespace: namespace-1
    - name: red
      namespace: namespace-1
    - name: yellow
      namespace: namespace-2
---
apiVersion: appmesh.k8s.aws/v1beta2
kind: VirtualNode
metadata:
  name: color-node
  namespace: ${APP_NAMESPACE}
spec:
  backendGroups:
    - name: color-group
      namespace: ${APP_NAMESPACE}
---

VirtualNode color-node will be able to use green, red, and yellow as backends.

Additionally, in the VirtualNode backendGroups field, specifying * as the Backend Group name will automatically add all VirtualServices in the specified namespace.

backendGroups:
  - name: *
    namespace: color-namespace

This allows any VirtualService in color-namespace to be a backend of the VirtualNode.