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+=========================
+Tested Runtimes for Train
+=========================
+
+It is the policy that each OpenStack release cycle will target the
+currently available runtimes on the :ref:`LTS or stable
+distributions <pti-linux-distros>` at the start of a development cycle.
+
+At the start of the Train development cycle, the current versions are:
+
+* Ubuntu 18.04
+* CentOS 7
+* openSUSE Leap 15
+
+Python Runtime for Train
+========================
+
+Based on the available Python runtimes for the supported Linux distributions,
+all Python-based projects must target and test against, at a minimum:
+
+* Python 2.7
+* Python 3.6
+* Python 3.7
+
+More details on Python requirements can be found in :ref:`pti-python`.
+
+Golang Runtime for Train
+========================
+
+At this time, there are still frequent releases of Go with a wide variety of
+distribution packaged versions. Given the current state of Go support and the
+number of projects within OpenStack using Go, no formal version declaration is
+being made at this time.
+
+More details on Go requirements can be found in :ref:`pti-golang`.