Updated Python wrapper application folder owner to default 8888 (#3674)

* Updated folder owner to default 8888

* Added docs

doc/source/reference/upgrading.md

@@ -6,6 +6,16 @@ If you were running our Openshift 0.4.2 certified operator and are looking to up
 
 Make sure you also [read the CHANGELOG](./changelog.html) to see the detailed features and bug-fixes in each version.
 
+
+## Upgrading to 1.12
+
+### Updated Python wrapper folder configurations
+
+  * The default running user in Seldon Core is 8888
+  * Some servers like the MLFlow Server v1 installs installations in runtime
+  * Access required to modify files in the local folder are required so the application folder should be writable
+  * The default base image now changes the owner of the /microservice folder to user 8888
+
 ## Upgrading to 1.11
 
 ### Python S2I Wrapper

wrappers/s2i/python/Dockerfile

@@ -31,4 +31,7 @@ RUN cd /microservice/python && pip install .
 RUN mkdir -p /.conda && chmod a+rwx /.conda
 RUN yum -y update-minimal --security --sec-severity=Important --sec-severity=Critical
 
+# Default user is 8888 so changing for permissiosn to modify (needed in mlflow server)
+RUN chown -R 8888 /microservice
+
 EXPOSE 5000

wrappers/s2i/python/Dockerfile.gpu

@@ -46,4 +46,7 @@ RUN cd /microservice/python && pip install .
 
 RUN mkdir -p /.conda && chmod a+rwx /.conda
 
+# Default user is 8888 so changing for permissiosn to modify (needed in mlflow server)
+RUN chown -R 8888 /microservice
+
 EXPOSE 5000