disable zincati OCI backend warning in MOTD

We don't use that as we ship our own custom images as such this should
be disabled to not confuse our users.

The following output is printed right now:

  The zincati service is disabled on this system.
  If not done so already please migrate the system to the OCI backend
  for updates by running:

  stream=stable # or testing or next
  target=ostree-remote-registry:fedora:quay.io/fedora/fedora-coreos:$stream
  sudo rpm-ostree rebase $target --reboot

  Where $stream matches the Fedora CoreOS stream the system is following.

  To disable this warning, use:
  sudo systemctl disable coreos-oci-migration-motd.service

Signed-off-by: Paul Holzinger <[email protected]>

Author: Luap99

podman-image/00-podman-machine.preset

@@ -3,6 +3,9 @@
 # Disable Root mountpoint warning on shh login
 # https://github.com/containers/podman-machine-os/issues/155
 disable coreos-warn-invalid-mounts.service
+# We don't use zincati but because we ship our own custom builds so
+# we don't care about the coreos update migration to OCI images.
+disable coreos-oci-migration-motd.service
 
 # Disable coreos chrony config, we do provide our own.
 disable coreos-platform-chrony-config.service

verify/image_test.go

@@ -160,6 +160,8 @@ var _ = Describe("run image tests", Ordered, ContinueOnFailure, func() {
 			output := sshSession.outputToString()
 			Expect(output).To(ContainSubstring("Fedora CoreOS"), "should contain FCOS motd message")
 			Expect(output).ToNot(ContainSubstring("Warning"), "no warnings in motd message seen")
+			// no coreos-oci-migration-motd.service output should be seen
+			Expect(output).ToNot(ContainSubstring("zincati"), "no zincati migrate wanring in motd message seen")
 		})
 
 		It("check systemd resolved is not in use", func() {