Prune osds and nodes from Ceph

Occasionally I’ll find myself removing decommissioned nodes from ceph. Heres a cheatsheet.

$ ceph osd tree
ID   CLASS  WEIGHT   TYPE NAME                    STATUS  REWEIGHT  PRI-AFF
 -1         1.44928  root default
 -3         0.23289      host x10slhf-xeon-920ea
  0    ssd  0.23289          osd.0                    up   1.00000  1.00000
 -7         0.23289      host x10slhf-xeon-9c3ab
  2    ssd  0.23289          osd.2                    up   1.00000  1.00000
 -5         0.23289      host x470d4u-zen-3700f
  1    ssd  0.23289          osd.1                    up   1.00000  1.00000
-11         0.25020      host x470d4u-zen-43c5a
  5    ssd  0.25020          osd.5                    up   1.00000  1.00000
 -9         0.50040      host x470d4u-zen-6ad59
  3    ssd  0.25020          osd.3                  down         0  1.00000
  4    ssd  0.25020          osd.4                  down         0  1.00000

ceph osd crush remove osd.3
ceph osd crush remove osd.4
ceph osd rm 3
ceph osd rm 4
ceph osd crush rm x470d4u-zen-6ad59

$ ceph osd tree
ID   CLASS  WEIGHT   TYPE NAME                    STATUS  REWEIGHT  PRI-AFF
 -1         0.94888  root default
 -3         0.23289      host x10slhf-xeon-920ea
  0    ssd  0.23289          osd.0                    up   1.00000  1.00000
 -7         0.23289      host x10slhf-xeon-9c3ab
  2    ssd  0.23289          osd.2                    up   1.00000  1.00000
 -5         0.23289      host x470d4u-zen-3700f
  1    ssd  0.23289          osd.1                    up   1.00000  1.00000
-11         0.25020      host x470d4u-zen-43c5a
  5    ssd  0.25020          osd.5                    up   1.00000  1.00000

Nathan Hensel