### Check mon status from socket
```
sudo ceph --admin-daemon /var/run/ceph/ceph-mon.qn-cnfslhc.asok config help
sudo ceph --admin-daemon /var/run/ceph/ceph-mon.qn-cnfslhc.asok config show
sudo ceph --admin-daemon /var/run/ceph/ceph-mon.qn-cnfslhc.asok

```
### Enable msgr2
Enable msgr2 in nautilus
```
ceph mon enable-msgr2
```
### OSD remove
```
$ ceph osd out osd.<ID>
$ systemctl stop osd.<ID>
$ ceph osd down osd.<ID>
$ ceph osd purge osd.<ID>
$ ceph auth rm  osd.<ID>
```

### Disk clean up
check spurious partitions with `lsblk` and then remove them with
```
dmsetup remove <partition hash>

for line in $(lsblk | grep block | awk '{print $1;}'); do id=${line:2} && dmsetup remove $id; done

```
Zap the the disk with `gdisk`
```
gdisk  /dev/sdbe < input
```
where input is a file with this content:
```
x
z
y
y
```
### Pools
```
ceph pool list
ceph pool status
ceph osd pool delete  --yes-i-really-really-mean-it
```

### OSD PG recreate
This is a destructive operation, to recover a severely degraded cluster.
Retrieve the list of inactive PGs for a given <state> :
```
ceph pg dump_stuck inactive | grep <state>
```
```
for i in `ceph pg dump_stuck inactive | grep <state> | awk '{print $1}'`;do ceph osd force-create-pg $i --yes-i-really-mean-it;done
```