Releases
https://docs.ceph.com/docs/master/releases/

CLI

ceph -v
ceph -s
ceph df

ceph status
ceph health detail
ceph df detail
ceph osd lspools
ceph osd pool ls detail

# replication size / count
ceph osd pool set os-dev_glance min_size 1
ceph osd pool set os-dev_glance size 2
ceph osd pool get os-dev_glance size

# disable rebuild
ceph osd set noout 

# enable rebuild
ceph osd unset noout

#default 1 3 3
ceph tell 'osd.*' injectargs '--osd_max_backfills 1 --osd_recovery_max_active 1 --osd_recovery_op_priority 3'

# health
ceph health detail 
ceph --version
rados list-inconsistent-obj 6.115 --format=json-pretty
ceph pg repair 6.115
ceph -w

# erasure
ceph osd erasure-code-profile ls
ceph osd pool create   erasure 

ceph health

# watch
ceph -w

ceph osd unset norecover
ceph osd unset nobackfill
ceph osd unset noout
ceph health

# get cluster’s FSID/UUID
ceph fsid

# additional commands
ceph tell mon.\* injectargs '--osd_pool_default_size=2'
ceph config set mgr target_max_misplaced_ratio .01
ceph osd set-require-min-compat-client luminous

monitoring

ceph mgr module enable prometheus

balancer

ceph mgr module enable balancer
ceph balancer mode upmap
ceph balancer on

rados / pool

rados df

Monitoring
https://github.com/ceph/ceph-nagios-plugins/releases

# Build nagios-plugins-ceph
sudo apt-get install -y devscripts fakeroot build-essential dh-python
git clone https://github.com/ceph/ceph-nagios-plugins.git
cd ceph-nagios-plugins#
make deb
sudo dpkg -i nagios-plugins-ceph_*_all.deb

# create wrapper for kolla-ansible installation
cat < /usr/bin/ceph
#!/bin/bash
docker exec -it ceph_mon ceph $@
EOF
chmod +x /usr/bin/ceph

/usr/lib/nagios/plugins/check_ceph_health

Replace OSD