Cloned VMs that keep the same /etc/machine-id collapse into a single
Docker host in Pulse, with each clone's report silently overwriting the
other (#1584). The server now tracks per-identity hostname and machine
ID observations and flags a conflict when a value flaps back to one
already seen inside a 15-minute window, a signature a one-time rename
never produces. The conflict rides the DockerHost model through unified
resources, and the Docker page shows a warning naming the flapping
hostnames with the machine-id remedy. The warning self-clears once one
clone stops reporting for the window.
rcourtman
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