Implemented cloud-provider integration for OpenStack.

Currently kubespray does not install kubernetes in a way that allows cinder volumes to be used. This commit provides the necessary cloud configuration file and configures kubelet and kube-apiserver to use it.

roles/kubernetes/preinstall/defaults/main.yml

@@ -8,3 +8,13 @@ common_required_pkgs:
   - rsync
   - bash-completion
 
+
+
+# For the openstack integration kubelet will need credentials to access
+# openstack apis like nova and cinder. Per default this values will be
+# read from the environment.
+openstack_auth_url: "{{ lookup('env','OS_AUTH_URL')  }}"
+openstack_username: "{{ lookup('env','OS_USERNAME')  }}"
+openstack_password: "{{ lookup('env','OS_PASSWORD')  }}"
+openstack_region: "{{ lookup('env','OS_REGION_NAME')  }}"
+openstack_tenant_id: "{{ lookup('env','OS_TENANT_ID')  }}"