hello-world-app.yaml

# -------------------------- Step 1: Define and install WorkloadType and Trait ---------------------
---
apiVersion: core.oam.dev/v1alpha1
kind: WorkloadType
metadata:
  name: radius
spec:
   schematic:
    # CRD schema mechanism. Feel free to replace this part with json-schema or OpenAPIv3 schema.
    apiVersion: apiextensions.k8s.io/v1
    kind: CustomResourceDefinition
    metadata:
      name: radius.cache.crossplane.io
      scope: Namespaced
      names:
        plural: radius
        singular: radius
        kind: Radius
    spec:
      group: cache.crossplane.io
      versions:
        - name: v1
          schema:
            openAPIV3Schema:
            type: object
            properties:
               spec:
               type: object
               properties:
                 address:
                   type: string
                 maxMemory:
                   type: integer
                 thread:
                   type: integer
---
apiVersion: core.oam.dev/v1alpha1
Kind: Trait
metadata:
  name: autoscaling   
spec:
   appliesTo:
     - core.oam.dev/v1alpha1.Server
     - cache.crossplane.io/v1.Radius
   schematic:
      # CRD schema mechanism. Feel free to replace this part with json-schema or OpenAPIv3 schema.
     apiVersion: apiextensions.k8s.io/v1
     kind: CustomResourceDefinition
     metadata:
       name: autoscalingtrait.scaling.crossplane.io
     spec:
       group: crossplane.io
       scope: Namespaced
       names:
         plural: autoscalingtraits
         singular: autoscalingtrait
         kind: AutoscalingTrait
       versions:
         - name: v1
           served: true
           storage: true
# -------------------------- Step 2: Define Application Configuration ---------------------
# Component object
---
apiVersion: core.oam.dev/v1alpha1 
kind: component
metadata:
  name: ryan-radius
spec:
  workloadType: radius # the name of pre-installed core.oam.dev/v1alpha1.WorkloadType
  workloadSettings:
    # other schema mechanism
    maxMemory: 256
    thread: 2
    address: ${fromParam(address, '127.0.0.1')} 

# Component object if using CRD
---
apiVersion: core.oam.dev/v1alpha1 
kind: component
metadata:
  name: ryan-radius
spec:
  workloadSettings:
    # CRD schema mechanism
    apiVersion: cache.crossplane.io/v1
    kind: Radius
    metadata:
      name: ryan-radius
    spec:
      maxMemory: 256
      thread: 2
      address: ${fromParam(address, '127.0.0.1')}

# Application Configuration
---
apiVersion: core.oam.dev/v1alpha1
kind: ApplicationConfiguration
metadata:
  name: hello-world-app
  annotations:
    version: v0.0.1
    description: "very first OAM app for the new spec"
spec:
  components:
    - name: ryan-radius # the name of pre-installed core.oam.dev/v1alpha1.Component
      parameterOverride:
        - name: address
          value: 192.168.0.1
      traits:
        - name: scale-radius
          properties:
            interval: 1
            maxCpuUsage: 80
            minInstance: 2
            maxInstance: 10
        - name: nginx-ingress
          properties:
            # other schema mechanism
            route: myapp.com
            tls: true

# Application Configuration in overlay flavor
---
apiVersion: core.oam.dev/v1alpha1
kind: ApplicationConfiguration
metadata:
  name: hello-world-app
  annotations:
    version: v0.0.1
    description: "very first OAM app for the new spec"
spec:
  components:
    - name: ryan-radius # it's the Component name, can't be skipped
      workload:
        apiVersion: cache.crossplane.io/v1
        kind: Radius
        metadata:
            name: ryan-radius # must be the same with Component name
          spec:
            maxMemory: 256
            thread: 2
            address: ${fromParam(address, '127.0.0.1')}
      parameterOverride:
        - name: address
          value: 192.168.0.1
      traits:
        - properties:
            # CRD schema mechanism
            apiVersion: crossplane.io/v1
            kind: autoscaling
            metadata:
              name: scale-radius
            spec:
              interval: 1
              maxCpuUsage: 80
              minInstance: 2
              maxInstance: 10
        - properties:
            # CRD schema mechanism
            apiVersion: crossplane.io/v1
            kind: ingress
            metadata:
              name: nginx-ingress
            spec:
              route: myapp.com
              tls: true