Merge "Move DB migrations documentation to its own file"

doc/source/contributor/contributing.rst

@@ -117,21 +117,6 @@ If any of the following applies to the patch, a release note is required:
 A release note is suggested if a long-standing or important bug is fixed.
 Otherwise, a release note is not required.
 
-Database Migrations
--------------------
-
-Monasca uses `Alembic <http://alembic.zzzcomputing.com/en/latest/>`_
-migrations to set up its configuration database. If you need to change the
-configuration database's schema, you need to create a migration to adjust the
-database accordingly, as follows::
-
-    cd monasca_api/db/
-    alembic revision
-
-This will create a new skeleton revision for you to edit. You will find
-existing revisions to use for inspiration in the
-``/monasca_api/db/alembic/versions/`` directory.
-
 Task Tracking
 ~~~~~~~~~~~~~
 .. This section is about where you track tasks- launchpad? storyboard? is there

doc/source/contributor/db_migrations.rst

@@ -0,0 +1,17 @@
+Database Migrations
+-------------------
+
+Monasca uses `Alembic <http://alembic.zzzcomputing.com/en/latest/>`_
+migrations to set up its configuration database. If you need to change the
+configuration database's schema, you need to create a migration to adjust the
+database accordingly, as follows::
+
+    cd monasca_api/db/
+    alembic revision
+
+This will create a new skeleton revision for you to edit. You will find
+existing revisions to use for inspiration in the
+``/monasca_api/db/alembic/versions/`` directory.
+
+Measurement data stored in a Time Series database (such as InfluxDB) would
+be migrated to a new version using standard practice for a given TSDB.

doc/source/contributor/index.rst

@@ -6,4 +6,5 @@ Contribution documentation
    :maxdepth: 1
 
    contributing.rst
+   db_migrations.rst
    code.rst