Kubernetes Container Recipe fails if connection block does not exist

[Reshrahim]

Steps to reproduce

1. Add the container resource type from the resource type contrib repo

     rad resource-type create -f ./Compute/containers/containers.yaml
   

2. Publish the bicep extension

    rad bicep publish-extension -f ./Compute/containers/containers.yaml --target radiusContainer.tgz
   

3. Publish and register the Bicep Recipe for containers

    rad bicep publish --file ./Compute/containers/recipes/kubernetes/bicep/kubernetes-containers.bicep --target br:ghcr.io/reshrahim/recipes/containersrr:latest
   

    rad recipe register default --environment my-env \   --resource-type Radius.Compute/containers \
   --template-kind bicep \
   --template-path ghcr.io/reshrahim/recipes/containersrr:latest
   

4. Deploy the below app.bicep

    extension radius
    extension radiusCompute
    param environment string
   
    resource todoapp 'Applications.Core/applications@2023-10-01-preview' = {
      name: 'todoapp'
      properties: {
        environment: environment
      }
    }
   
    resource mycontainer 'Radius.Compute/containers@2025-08-01-preview' = {
      name: 'mycontainer'
      properties: {
        environment: environment
        application: todoapp.id
        containers: {
          demo: {
            image: 'ghcr.io/radius-project/samples/demo:latest'
            ports: {
              web: {
                containerPort: 3000
              }
            }
          }  
        }
      }
    }
   

Observed behavior

The deployment fails with the following error

Deploying template 'app.bicep' into environment '/planes/radius/local/resourcegroups/my-group/providers/Applications.Core/environments/my-env' from workspace 'my-workspace'...

Deployment In Progress...

Completed            todoapp         Applications.Core/applications
.                    mycontainer     Radius.Compute/containers
Error: {
  "code": "DeploymentFailed",
  "message": "At least one resource deployment operation failed. Please list deployment operations for details. Please see https://aka.ms/arm-deployment-operations for usage details.",
  "target": "/planes/radius/local/resourceGroups/my-group/providers/Microsoft.Resources/deployments/rad-deploy-767b736c-486d-4f2a-9bd7-1d21f95f7ec9",
  "details": [
    {
      "code": "OK",
      "message": "",
      "target": "/planes/radius/local/resourceGroups/my-group/providers/Applications.Core/applications/todoapp"
    },
    {
      "code": "ResourceDeploymentFailure",
      "message": "Failed",
      "target": "/planes/radius/local/resourceGroups/my-group/providers/Radius.Compute/containers/mycontainer",
      "details": [
        {
          "code": "RecipeDeploymentFailed",
          "message": "failed to deploy recipe default of type Radius.Compute/containers",
          "details": [
            {
              "code": "InvalidTemplate",
              "message": "Deployment template validation failed: 'The template variable 'connectionDefinitions' is not valid: The language expression property 'connections' doesn't exist, available properties are 'application, containers, environment, status'.. Please see https://aka.ms/arm-functions for usage details.'.",
              "additionalInfo": [
                {
                  "type": "TemplateViolation",
                  "info": {
                    "lineNumber": 1,
                    "linePosition": 853,
                    "path": "properties.template.variables.connectionDefinitions"
                  }
                }
              ]
            }
          ]
        }
      ]
    }
  ]
}

Desired behavior

Connections is not a required property on Containers and container Recipe should have logic to handle empty connections. Deployment should be successful

Workaround

No response

rad Version

CLI Version Information:
RELEASE VERSION BICEP COMMIT
edge a48305b 0.39.26 a48305b2b22ef1bcdb562758940ecfc6512aad4b

Control Plane Information:
STATUS VERSION
Installed edge

Operating system

No response

Additional context

No response

Would you like to support us?

• Yes, I would like to support you

AB#18003