An ECS Service needs a Task Definition that describes the container(s) to run. On the canvas, draw an edge from the Task Definition node to the Service node. Without this connection, the generator emits a placeholder ARN that CloudFormation will reject.
Paste into this field
No field to fill — draw an edge on the canvasOutput looks like
Canvas edge: ECS Task Definition → ECS ServiceDrag "ECS Task Definition" from the sidebar onto the canvas.
Click the Task Definition node → set "image" to your ECR image URI. Without this, you will get a second validation error about the image.
Hover over the Task Definition node until handles appear. Drag from the Task Definition to the ECS Service node.
Re-open Export. Both the cluster and task definition errors should be resolved.
Once you have the value, go back to CloudStack Canvas and paste it into the highlighted field.
CloudStack Canvas · Validation Guide