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Disable SELinux

Install ceph:

For C7:

rpm -Uvh https://download.ceph.com/rpm-nautilus/el7/noarch/ceph-release-1-1.el7.noarch.rpm
yum install yum-plugin-priorities

For C8:

rpm -Uvh https://download.ceph.com/rpm-nautilus/el8/noarch/ceph-release-1-1.el8.noarch.rpm

Then:

yum clean all
yum update
yum install ceph

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Move the host in the hosts_all/CephProd hostgroup(hosts_all/CephProd-C8 dor CentOS8) hostgroup 

Run once puppet:

puppet agent -t

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If not (i.e. if some are using straw), run the following command:

ceph osd crush set-all-straw-buckets-to-straw2 

Warning: this could trigger a data rebalance

Enable and start puppet:

systemctl start puppet

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systemctl enable puppet

Then, after a few minutes, check that "ceph status" doesn't report Pgs in peering.

Then:

[root@c-osd-1 /]# ceph osd unset nobackfill

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nobackfill is unset

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[root@c-osd-1 /]# ceph osd unset norebalance

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norebalance is unset

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[root@c-osd-1 /]# ceph osd unset noout

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noout is unset

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[root@c-osd-1 /]# 

This should trigger a data movement.