Similar to deploying Prometheus, create a new Harness Service.
Setup -> AWS Canary -> Services + Add Service

Click Submit. Now click +Add Artifact Source and choose Docker Registry in the Service Overview Section.

Once you click Submit, before importing the YAMLs in, one modification is needed.
In the Forked Sample Application Folder GitHub, make modification to the sample_application/values.yaml. The change needed is to configure Prometheus which you installed as an Allowed Origin.
ALLOWED_ORIGINS: http://_elb_address:8080/
e.g http://a8241cbf8317f4c1ab5507fbce9d576c-671821569.us-east-2.elb.amazonaws.com:8080/
Commit the Change to your Fork

After the Commit, change back to the Sample App to Link Remote Manifests.
Setup -> AWS Canary Lab -> Services -> Sample App

Then enter the Remote Manifest Details

Click Submit and you are ready to configure the canary.