github.com/oam-dev/kubevela@v1.9.11/docs/examples/live-diff/definitions/myingress.yaml

apiVersion: core.oam.dev/v1beta1
kind: TraitDefinition
metadata:
  name: myingress
spec:
  appliesToWorkloads:
    - "*"
  schematic:
    cue:
      template: |
        import (
        	kubev1 "kube/v1"
        	network "kube/networking.k8s.io/v1beta1"
        )

        parameter: {
        	domain: string
        	http: [string]: int
        }

        outputs: {
        service: kubev1.#Service
        ingress: network.#Ingress
        }

        // trait template can have multiple outputs in one trait
        outputs: service: {
        	metadata:
        		name: context.name
        	spec: {
        		selector:
        			"app.oam.dev/component": context.name
        		ports: [
        			for k, v in parameter.http {
        				port:       v
        				targetPort: v
        			},
        		]
        	}
        }

        outputs: ingress: {
        	metadata:
        		name: context.name
        	spec: {
        		rules: [{
        			host: parameter.domain
        			http: {
        				paths: [
        					for k, v in parameter.http {
        						path: k
        						backend: {
        							serviceName: context.name
        							servicePort: v
        						}
        					},
        				]
        			}
        		}]
        	}
        }