### 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 i in `cat ~/disks.txt`;do id=$(lsblk $i  | grep ceph | awk '{print $1;}') && id_c=${id:2} && dmsetup remove $id_c ;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 osd pool ls
ceph osd pool  delete <pool> <pool> --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
```
### BLUEFS_SPILLOVER BlueFS spillover detected
Sometimes the metadata can spillover to spinning disks. The way to solve this is to scrub the OSDs:
```
ceph osd scrub <id>
```
As a reference from the documentation:
>Data Scrubbing: As part of maintaining data consistency and cleanliness, Ceph OSD Daemons can scrub objects within placement groups. That is, Ceph OSD Daemons can compare object metadata in one placement group with its replicas in placement groups stored on other OSDs. Scrubbing (usually performed daily) catches bugs or filesystem errors. Ceph OSD Daemons also perform deeper scrubbing by comparing data in objects bit-for-bit. Deep scrubbing (usually performed weekly) finds bad sectors on a drive that weren’t apparent in a light scrub. See Data Scrubbing for details on configuring scrubbing.