Unclear MEMCACHED_IMAGE env variable usage in tutorial when deploying to cluster #7007
Description
What is the URL of the document?
Which section(s) is the issue in?
2-run-as-a-deployment-inside-the-cluster
What needs fixing?
When you follow tutorial literally and run make deploy, the controller cannot create pods. Instead, it just logs errors like the following:
2025-11-03T10:25:53Z ERROR Failed to define new Deployment resource for Memcached {"controller": "memcached", "controllerGroup": "cache.example.com", "controllerKind": "Memcached", "Memcached": {"name":"memcached-sample","namespace":"memcached-operator-system"}, "namespace": "memcached-operator-system", "name": "memcached-sample", "reconcileID": "bc4fe710-acb1-4ae3-a1b6-86c15bd50f30", "error": "unable to find MEMCACHED_IMAGE environment variable with the image"}
github.com/example/memcached-operator/internal/controller.(*MemcachedReconciler).Reconcile
/workspace/internal/controller/memcached_controller.go:205
It would be nice to point out in the tutorial where this env variable should be set. As I cannot add env: to the sample manifest (kind: Memcached), I just patched my deployment and the pods started successfully. I think there must be another way and it should be described in that section.