Kubernetes PVCs and Nova availability zones

[brutus333]

Is this a BUG REPORT or FEATURE REQUEST? (choose one):
FEATURE REQUEST

The default behavior of Kubernetes scheduler enforce volume placing constraints: the pod is scheduled to a node only if the persistent volume belongs to the same availability zone as the volume.
However, in Openstack clouds it is highly possible to have non-matching availability zones for Nova and Cinder.
The feature should implement a way to disable the placing constraint: for example, removing NoVolumeZoneConflict in the default scheduler policy file. This may be configured via an ansible variable or on all kubespray deployments in openstack.

Environment:

• Cloud provider or hardware configuration:
  Openstack
• OS (printf "$(uname -srm)\n$(cat /etc/os-release)\n"):
  Linux 4.10.0-35-generic x86_64
  NAME="Ubuntu"
  VERSION="16.04.3 LTS (Xenial Xerus)"
  ID=ubuntu
  ID_LIKE=debian
  PRETTY_NAME="Ubuntu 16.04.3 LTS"
  VERSION_ID="16.04"
  HOME_URL="http://www.ubuntu.com/"
  SUPPORT_URL="http://help.ubuntu.com/"
  BUG_REPORT_URL="http://bugs.launchpad.net/ubuntu/"
  VERSION_CODENAME=xenial
  UBUNTU_CODENAME=xenial
• Version of Ansible (ansible --version):
  ansible 2.4.1.0
  config file = /opt/workshop/ansible.cfg
  configured module search path = [u'/var/lib/rundeck/.ansible/plugins/modules', u'/usr/share/ansible/plugins/modules']
  ansible python module location = /opt/workshop/pyenv/local/lib/python2.7/site-packages/ansible
  executable location = /opt/workshop/pyenv/bin/ansible
  python version = 2.7.12 (default, Nov 19 2016, 06:48:10) [GCC 5.4.0 20160609]

Kubespray version (commit) (git rev-parse --short HEAD):
7bae2a4

Network plugin used:
calico

Copy of your inventory file:
not relevant

Command used to invoke ansible:
not relevant

Output of ansible run:

not relevant
Anything else do we need to know: