Description of problem:
Documentation bug: Red Hat Ceph Storage for the Overcloud


Actual results:

Documentation mentions the following, in section 2.5 Defining the root disk:
 First, find the serial number of the intended root drive for each node. Use the ironic node-show command for each node and identify the block devices available from the extra section. For example, use the following to list all nodes and their block devices:

$ for uuid in `ironic node-list | awk '{print $2}'`; do echo "Node ID: $uuid"; ironic node-show $uuid | grep 'properties\|extra ' -A3; done

For this example, the output includes the following:

...
Node ID: 97e3f7b3-5629-473e-a187-2193ebe0b5c7
| extra       | {u'newly_discovered': u'true', u'block_devices':      |
|             | {u'serials': [u'100000000', u'100000001',             |
|             | u'100000002', u'100000003', u'100000004',             |
|             | u'100000005', u'100000006', u'100000007',             |
--
| properties  | {u'cpu_arch': u'x86_64', u'root_device': {u'serial':  |
|             | u'100000005'}, u'cpus': u'16', u'capabilities':       |
|             | u'profile:ceph-storage,boot_option:local',            |
|             | u'memory_mb': u'65536', u'local_gb': u'3725'}         |
...


Expected results:
Extra specs are stored in swift now, so the documentation needs to be changed

Additional info:

    https://repos.fedorapeople.org/repos/openstack-m/jenkins/instack-undercloud-docs/243602-1/html/advanced_deployment/profile_matching.html  
      
    export IRONIC_DISCOVERD_PASSWORD=`sudo grep admin_password /etc/ironic-inspector/inspector.conf | egrep -v '^#'  | awk '{print $NF}'`  
      
    for node in $(ironic node-list | grep -v UUID| awk '{print $2}');  
      do swift -U service:ironic -K $IRONIC_DISCOVERD_PASSWORD download ironic-inspector extra_hardware-$node;  
    done  
      
    for f in extra_hardware-*;  
      do cat $f | jq -r 'map(select(.[0]=="disk" and .[1]=="vda"))';  
    done  
      
    Specify a hint according to:  
    http://docs.openstack.org/developer/ironic/deploy/install-guide.html#specifying-the-disk-for-deployment  
      
    Attention: "name" hints will work only for introspection  
    e.g.:  
    ironic node-update <node-uuid> add properties/root_device='{"name": "/dev/vda"}'  
    There should be a "name" hint, but this doesn't work: This doesn't work: for i in {1..3};do ironic node-update overcloud-ceph$i replace properties/root_device='{"size": "64"}';done  
    (for i in {1..3};do ironic node-update overcloud-ceph$i add properties/root_device='{"name": "/dev/vda"}';done)  
    For this, disks need to be of different size:  
    for i in {1..3};do ironic node-update overcloud-ceph$i add properties/root_device='{"size": "64"}';done  
    InstanceDeployFailure: RPC do_node_deploy failed to validate deploy or power info. Error: The hints "name" are invalid. Valid hints are: "model, wwn, vendor, serial, size"  
      
      
    https://bugzilla.redhat.com/show_bug.cgi?id=1327866   
      
      
    This needs to be run _before_ introspection  to determine the correct root size!  
      
    openstack introspection bulk start