Description of problem:

After deploying with director, 'ceph health' shows this error:

HEALTH_WARN too few pgs per osd (19 < min 30)


Version-Release number of selected component (if applicable):

7.1

How reproducible:

Every

Steps to Reproduce:
1. Leave the default value for ceph::profile::params::osd_pool_default_pg_num: 128 in ceph.yaml hiera file
2. deploy overcloud


Actual results:

#ceph health
HEALTH_WARN too few pgs per osd (19 < min 30)


Expected results:

no error or warning

Additional info:

All hiera data files should contain appropriate comments directing operators to set values accordingly (with URLs to supporting documentation.)

The Director Install and Config guide should contain the same documentation.