docker stack deploy results in "No such image error"

I want to add another scenario that leads to the same outcome (error message) so that people won't bang their heads against the wall.

Another possibility is that you are trying to deploy the image with the insecure registry but forget to edit daemon.json on the server pulling the image.

If that is the case, lets this answer act as a reminder; and save you some time.

Already found the solution. My image is hosted on a private repository. Besides the swarm manager (where I executed the commands), I had a running swarm worker.

When I ran docker stack deploy -c docker-compose.yml myapp docker deployed the service to the worker node (not the manager node as I thought). At the worker node, docker had no credentials to pull the image from the private repository. Hence, to fix this either pass the flag --with-registry-auth (which pushes the credentials for the repository to the worker node) or make sure that the service is deployed to a node where the image is present.

See: https://docs.docker.com/engine/reference/commandline/deploy/