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Devstack on Pod 18 is OS Train right now. Train matches CNTT Baraque and the next CNTT release. A stretch goal is to install Devstack Stein for verification with OPNFV- JERMA target. There should not be a big impact on the test tools between Stein and Train. (Baldy was Pike?) Best -possible AIRSHIP compatibility is Stein for this release.
Note that OS Stein is the minimum for OPNFV-JERMA, so compliance with later releases is allowed of course.