How to remove a node that contains Mon, OSD, and MDs in a ceph cluster

The steps are as follows:

1. Remove Mon

[Email protected] ~]# ceph Mon Remove bgw-os-node153

Removed mon.bgw-os-node153 at 10.240.216.153:6789/0, there is now 2 monitors

2. Remove all OSD on this node

1), view the OSD for this node

[[email protected] ~]# Ceph OSD Tree

-4 1.08 host bgw-os-node153

8 0.27 Osd.8 up 1

9 0.27 Osd.9 up 1

0.27 osd.10 up 1

0.27 osd.11 up 1

2), the above node of the OSD process to stop

[[email protected] ~]#/etc/init.d/ceph stop OSD

= = = Osd.10 = =

Stopping Ceph osd.10 on Bgw-os-node153...kill 2251...done

= = = Osd.9 = =

Stopping Ceph Osd.9 on Bgw-os-node153...kill 2023...kill 2023...done

= = = Osd.8 = =

Stopping Ceph Osd.8 on Bgw-os-node153...kill 1724...kill 1724...done

= = = Osd.11 = =

Stopping Ceph osd.11 on Bgw-os-node153...kill 1501...done

3), check the Ceph OSD status again

[[email protected] ~]# Ceph OSD Tree

-4 1.08 host bgw-os-node153

8 0.27 Osd.8 down 1

9 0.27 Osd.9 down 1

0.27 osd.10 down 1

0.27 osd.11 down 1

4), delete all the OSD

[[email protected] ~]# Ceph OSD RM 8

Removed Osd.8

[[email protected] ~]# Ceph OSD RM 9

Removed Osd.9

[[email protected] ~]# Ceph OSD RM 10

^[[aremoved osd.10

[[email protected] ~]# Ceph OSD RM 11

Removed osd.11

5), delete all OSD Crush map

[Email protected] ~]# ceph OSD Crush RM Osd.8

Removed item ID 8 name ' Osd.8 ' from crush map

[Email protected]w-os-node153 ~]# ceph OSD Crush RM Osd.9

Removed item ID 9 name ' Osd.9 ' from crush map

[Email protected] ~]# ceph OSD Crush RM osd.10

^[[aremoved Item ID Ten name ' osd.10 ' from crush map

[Email protected] ~]# ceph OSD Crush RM osd.11

Removed item ID one name ' osd.11 ' from crush map

6), remove all OSD Certification

[Email protected] ~]# ceph auth del Osd.8

Updated

[Email protected] ~]# ceph auth del Osd.9

Updated

[Email protected] ~]# ceph auth del osd.10

Updated

[Email protected] ~]# ceph auth del osd.11

Updated

7), delete the crush map of this machine host in the Ceph OSD tree

[Email protected] ~]# ceph OSD Crush RM bgw-os-node153

Removed item id-4 name ' bgw-os-node153 ' from crush map

8), uninstall all the hard drives mounted on the OSD

[Email protected] ~]# umount/var/lib/ceph/osd/ceph-8

[Email protected] ~]# umount/var/lib/ceph/osd/ceph-9

[Email protected] ~]# umount/var/lib/ceph/osd/ceph-10

[Email protected] ~]# umount/var/lib/ceph/osd/ceph-11

3. Remove MDS

1. Directly close the MDS process for this node

[[email protected] ~]#/etc/init.d/ceph stop MDS

= = = Mds.bgw-os-node153 = =

Stopping Ceph mds.bgw-os-node153 on Bgw-os-node153...kill 4981...done

[Email protected] ~]#

2. Remove this MDS certification

[Email protected] ~]# ceph auth del mds.bgw-os-node153

Updated

This article is from the "Zhangdh Open Space" blog, so be sure to keep this source http://linuxblind.blog.51cto.com/7616603/1710188

How to remove a node that contains Mon, OSD, and MDs in a ceph cluster