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diff --git a/docs/other/dependency_deprecation_policy.md b/docs/other/dependency_deprecation_policy.md new file mode 100644 index 0000000000..06ea340559 --- /dev/null +++ b/docs/other/dependency_deprecation_policy.md @@ -0,0 +1,33 @@ +Deprecation Policy for Platform Dependencies +============================================ + +Synapse has a number of platform dependencies, including Python and PostgreSQL. +This document outlines the policy towards which versions we support, and when we +drop support for versions in the future. + + +Policy +------ + +Synapse follows the upstream support life cycles for Python and PostgreSQL, +i.e. when a version reaches End of Life Synapse will withdraw support for that +version in future releases. + +Details on the upstream support life cycles for Python and PostgreSQL are +documented at https://endoflife.date/python and +https://endoflife.date/postgresql. + + +Context +------- + +It is important for system admins to have a clear understanding of the platform +requirements of Synapse and its deprecation policies so that they can +effectively plan upgrading their infrastructure ahead of time. This is +especially important in contexts where upgrading the infrastructure requires +auditing and approval from a security team, or where otherwise upgrading is a +long process. + +By following the upstream support life cycles Synapse can ensure that its +dependencies continue to get security patches, while not requiring system admins +to constantly update their platform dependencies to the latest versions. |