Ceph » rbd

Thinly provisioned RBD image creation/resize should check RBD pool free size

Additional info:
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[root@ceph4-230 ~]# ceph -v
ceph version 10.2.2-38.el7cp (119a68752a5671253f9daae3f894a90313a6b8e4)
[root@ceph4-230 ~]# 

[root@ceph4-230 ~]# ceph -s
    cluster e9b22e9e-27a2-47e6-8b64-65312a8c13c1
     health HEALTH_OK
     monmap e1: 3 mons at {ceph4-230=192.168.4.230:6789/0,ceph4-231=192.168.4.231:6789/0,ceph4-232=192.168.4.232:6789/0}
            election epoch 28, quorum 0,1,2 ceph4-230,ceph4-231,ceph4-232
      fsmap e21: 1/1/1 up {0=ceph4-231=up:active}, 2 up:standby
     osdmap e49: 6 osds: 6 up, 6 in
            flags sortbitwise
      pgmap v27771: 320 pgs, 3 pools, 2068 bytes data, 21 objects
            240 MB used, 113 GB / 113 GB avail
                 320 active+clean
  client io 202 B/s rd, 0 op/s rd, 0 op/s wr

[root@ceph4-230 ~]# ceph df
GLOBAL:
    SIZE     AVAIL     RAW USED     %RAW USED 
    113G      113G         240M          0.21 
POOLS:
    NAME                ID     USED     %USED     MAX AVAIL     OBJECTS 
    rbd                 0         0         0        38806M           1 
    cephfs_data         1         0         0        38806M           0 
    cephfs_metadata     2      2068         0        38806M          20 

[root@ceph4-230 ~]# rbd create rbd/testrbd -s 1T 

^^ I am able to create RBD image with 1T size and pool has only 38806M available.

[root@ceph4-230 ~]# rbd -p rbd ls -l 
NAME     SIZE PARENT FMT PROT LOCK 
testrbd 1024G          2           

[root@ceph4-230 ~]# ceph df
GLOBAL:
    SIZE     AVAIL     RAW USED     %RAW USED 
    113G      113G         240M          0.21 
POOLS:
    NAME                ID     USED      %USED     MAX AVAIL     OBJECTS 
    rbd                 0      65649         0        38805M           4 
    cephfs_data         1          0         0        38805M           0 
    cephfs_metadata     2       2068         0        38805M          20 

[root@ceph4-230 ~]# rbd resize rbd/testrbd -s 2T 
Resizing image: 100% complete...done.

^^ I am able to resize to 2T but rbd pool has only 38805M max available.

[root@ceph4-230 ~]# rbd -p rbd ls -l 
NAME     SIZE PARENT FMT PROT LOCK 
testrbd 2048G          2    

[root@ceph4-230 ~]# ceph df
GLOBAL:
    SIZE     AVAIL     RAW USED     %RAW USED 
    113G      113G         240M          0.21 
POOLS:
    NAME                ID     USED     %USED     MAX AVAIL     OBJECTS 
    rbd                 0      128k         0        38805M           4 
    cephfs_data         1         0         0        38805M           0 
    cephfs_metadata     2      2068         0        38805M          20