WordPress in OpenShift Origin using the official example - openshift-origin

Question

I've installed All-In-One OpenShift Origin Virtual Machine (Version 1.1.6) and deployed WordPress by following the instruction given in origin/examples/wordpress.
I've chosen NFS storage
I need to know:
When I ls in to /home/data/pv0002 it show MySQL files as expected. But when I ls in to the /home/data/pv0001 it shows nothing! isn't the WordPress files have to be there?
When I try to upload media in WordPress it show an error message like below
Unable to create directory wp-content/uploads/2016/05. Is its parent directory writable by the server?
What do I have to do to fix this?
When I try to install new theme it asks for ftp credentials. What do I have to do to get that?
Log from POD
warning: both WORDPRESS_DB_HOST and MYSQL_PORT_3306_TCP found
Connecting to WORDPRESS_DB_HOST (mysql)
instead of the linked mysql container
WordPress not found in /var/www/html - copying now...
WARNING: /var/www/html is not empty - press Ctrl+C now if this is an error!
+ ls -A
+ sleep 10
.htaccess
tar: ./index.php: Cannot change ownership to uid 33, gid 33: Operation not permitted
tar: ./license.txt: Cannot change ownership to uid 33, gid 33: Operation not permitted
tar: ./readme.html: Cannot change ownership to uid 33, gid 33: Operation not permitted
tar: ./wp-activate.php: Cannot change ownership to uid 33, gid 33: Operation not permitted
tar: ./wp-admin/about.php: Cannot change ownership to uid 33, gid 33: Operation not permitted
tar: ./wp-admin/admin-ajax.php: Cannot change ownership to uid 33, gid 33: Operation not permitted
tar: ./wp-admin/admin-footer.php: Cannot change ownership to uid 33, gid 33: Operation not permitted
tar: ./wp-admin/admin-functions.php: Cannot change ownership to uid 33, gid 33: Operation not permitted
tar: ./wp-admin/admin-header.php: Cannot change ownership to uid 33, gid 33: Operation not permitted
tar: ./wp-admin/admin-post.php: Cannot change ownership to uid 33, gid 33: Operation not permitted
tar: ./wp-admin/admin.php: Cannot change ownership to uid 33, gid 33: Operation not permitted
...
tar: ./xmlrpc.php: Cannot change ownership to uid 33, gid 33: Operation not permitted
tar: .: Cannot utime: Operation not permitted
tar: .: Cannot change ownership to uid 33, gid 33: Operation not permitted
tar: .: Cannot change mode to rwxr-xr-x: Operation not permitted
tar: Exiting with failure status due to previous errors

Answer 1

From Centos 7 I did the following steps and everything worked perfectly. Important steps are 3, 4 and 5. And there is no need to edit the restricted scc to RunAsAny.
Step 1:
# systemctl status docker
# systemctl status nfs
Step 2:
start cluster
Step 3:
# mkdir -p /home/data/pv0001
# mkdir -p /home/data/pv0002
# chmod -R 777 /home/data/
# chown -R nfsnobody:nfsnobody /home/data/
Step 4:
# cat /etc/exports
/home/data/pv0001 *(rw,sync,no_root_squash)
/home/data/pv0002 *(rw,sync,no_root_squash)
# exportfs -a
# setsebool -P virt_use_nfs 1
Step 5:
and from wordpress project as system:admin
# oadm policy add-scc-to-user anyuid -z default
which means allow the containers in this project to run as root.
Step 6:
deploy wordpress