Hi, In June, we've added the ability to deploy hot-standby controllers (fdbf073 (https://github.com/apache/incubator-openwhisk/commit/fdbf073a386c33aed1b06ed93eaea39ee4382c7b)). With this commit, the containername of the controllers has been changed from controller to controller0, controller1, ... To not break the update of existing deployments we left the cleanup of containers called controller in the cleanup script of the controller. Since the change of renaming the containers is long time ago, we can remove this old code now. This will be done with the following PR: https://github.com/apache/incubator-openwhisk/pull/2688 (https://github.com/apache/incubator-openwhisk/pull/2688)
If you still have a running environment with a controller without an index in its name and you want to update this environment, you can remove this controller with docker rm controller before you update the environment. Greetings Christian
