Comment 2 for bug 1763356

paul is correct. And this easily happens in a small environment. There are two options when you hit the issue

1. set a smaller number for default ceph pg num

  #globals.yml
  ceph_pool_pg_num: 64
  ceph_pool_pgp_nmum: 64

2. or set a higher number for mon_max_pg_per_osd

  #/etc/kolla/conf/ceph.conf

  [global]
  mon max pg per osd = 3000

for the kolla, I think we change 1) as default in group_vars/all.yml file.