Deployments with ceph:  public_network and cluster_network don't accept LIST. 

Environment:
ceph-ansible-3.0.2-1.el7cp.noarch
openstack-tripleo-heat-templates-7.0.2-0.20171007062244.el7ost.noarch
puppet-ceph-2.4.2-0.20170927195215.718a5ff.el7ost.noarch
instack-undercloud-7.4.2-0.20171006021856.el7ost.noarch

Testing a deployment with composable networks, where we have a segregated storage and storagemgmt network for each OSD node -  found that the ceph.conf has only one public/cluster network in it.

[root@overcloud-cephstorage3-0 ~]# cat /etc/ceph/ceph.conf |grep -e network
cluster network = 172.120.4.0/24
public network = 172.120.3.0/24

And these are the subnets defined for StorageMgmt and Storage networks respectively.

The OSD fails to start on storage nodes in this case - it doesn't have an IP in the right subnet.


We need to support a list of subnets. The "working" ceph.conf would list all defined storage and storagemgmt subnets:
[root@overcloud-cephstorage3-0 ~]# cat /etc/ceph/ceph.conf |grep -e network
cluster network = 172.120.4.0/24,172.117.4.0/24,172.118.4.0/24,172.119.4.0/24
public network = 172.120.3.0/24,172.117.3.0/24,172.118.3.0/24,172.119.3.0/24