Created attachment 1351562 [details]
Ansible.log

Description of problem:
RHEL cluster deployment fails with error "devices is undefined" when the osd_scenario is lvm

Version-Release number of selected component (if applicable):
[admin@magna051 ceph-ansible]$ rpm -qa | grep ansible
ceph-ansible-3.0.10-2.el7cp.noarch
ansible-2.4.1.0-1.el7ae.noarch

How reproducible:
2/2

Steps to Reproduce:
. created lv cache volume on the osd nodes using the below commands.
a. pvcreate  /dev/sdb1 /dev/sdc1
b. vgcreate data_vg /dev/sdb1 /dev/sdc1
c. lvcreate -L 400G -n slowdisk data_vg /dev/sdb1 
d. lvcreate -L 100G -n cachedisk data_vg /dev/sdc1
e. lvcreate -L 2G -n metadisk data_vg /dev/sdc1
f. lvconvert --type cache-pool /dev/data_vg/cachedisk --poolmetadata /dev/data_vg/metadisk
g. lvconvert --type cache data_vg/slowdisk --cachepool data_vg/cachedisk
2. In osds.yml set the osd_scenario to "lvm"
3.  rhel cluster deployment fails
p.s. used /dev/sdd1 partition for journal.
TASK [ceph-defaults : resolve device link(s)] *********************************************************************************************************************************************************************
task path: /usr/share/ceph-ansible/roles/ceph-defaults/tasks/facts.yml:128
fatal: [magna051]: FAILED! => {
    "failed": true, 
    "msg": "'devices' is undefined"
}
Actual results:
The deployment fails 

Expected results:
the deployment should succeed.

Additional info:
[admin@magna051 ceph-ansible]$ lsblk
NAME                        MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sda                           8:0    0 931.5G  0 disk 
└─sda1                        8:1    0 931.5G  0 part /
sdb                           8:16   0 931.5G  0 disk 
└─sdb1                        8:17   0 931.5G  0 part 
  └─data_vg-slowdisk_corig  253:3    0   400G  0 lvm  
    └─data_vg-slowdisk      253:0    0   400G  0 lvm  
sdc                           8:32   0 931.5G  0 disk 
└─sdc1                        8:33   0 931.5G  0 part 
  ├─data_vg-cachedisk_cdata 253:1    0   100G  0 lvm  
  │ └─data_vg-slowdisk      253:0    0   400G  0 lvm  
  └─data_vg-cachedisk_cmeta 253:2    0     2G  0 lvm  
    └─data_vg-slowdisk      253:0    0   400G  0 lvm  
sdd                           8:48   0 931.5G  0 disk 
└─sdd1                        8:49   0 931.5G  0 part 
[admin@magna051 ceph-ansible]$ rpm -qa | grep ansible
ceph-ansible-3.0.10-2.el7cp.noarch
ansible-2.4.1.0-1.el7ae.noarch
=====
[admin@magna051 ceph-ansible]$ cat /usr/share/ceph-ansible/group_vars/osds.yml | egrep -v ^# | grep -v ^$
---
dummy:
osd_scenario: lvm #"{{ 'collocated' if journal_collocation or dmcrytpt_journal_collocation else 'non-collocated' if raw_multi_journal or dmcrypt_dedicated_journal else 'dummy' }}" # backward compatibility with stable-2.2, will disappear in stable 3.1
lvm_volumes:
  - data: slowdisk #data-lv3
    journal: /dev/sdd1
    data_vg: data_vg #vg2
=====
[admin@magna051 ceph-ansible]$ cat /usr/share/ceph-ansible/group_vars/all.yml | egrep -v ^# | grep -v ^$
---
dummy:
fetch_directory: ~/ceph-ansible-keys
ceph_origin: distro
ceph_repository: rhcs
monitor_interface: eno1
public_network: 10.8.128.0/21
[admin@magna051 ceph-ansible]$