# rbd ls pool02
vol01
vol_01
vol_02
vol_test
vol_03
vol_04

これで192.168.10.12と192.168.10.11が利用している事がわかる。

# rbd status vol01 -p pool02
Watchers:
        watcher=192.168.10.12:0/1416759822 client.387874 cookie=18446462598732840961
        watcher=192.168.10.11:0/886076642 client.394385 cookie=18446462598732840963

マッピング

# rbd map vol01 -p pool02

・アンマップ

# rbd unmap vol01 -p pool02

・マッピング確認

# rbd showmapped

ボリューム: vol_testtest プール: pool02 として説明

# rbd resize vol_testtest --size 2T -p pool02

# rbd info vol_testtest -p pool02
rbd image 'vol_testtest':
        size 2 TiB in 524288 objects
        order 22 (4 MiB objects)
        snapshot_count: 0
        id: 7a30a285303f3
        block_name_prefix: rbd_data.7a30a285303f3
        format: 2
        features: layering
        op_features: 
        flags: 
        create_timestamp: Sat Mar 21 11:25:30 2020
        access_timestamp: Sat Mar 21 11:25:30 2020
        modify_timestamp: Sat Mar 21 11:25:30 2020

マウントしたままリサイズ可能。
サイズを指定しない場合は最大まで拡張

1.casのキャッシュ解除

# systemctl stop cas-onappbk
# systemctl status cas-onappbk
# rbd showmapped

2.rbdを直接マウントしxfs_groufs

# rbd map vol_testtest -p pool02
# mount /dev/rbd0 /onapp/backups 
# xfs_growfs /onapp/backups -D size
# umount /onapp/backups 
# rbd unmap vol_testtest -p pool02

3.casのキャッシュを起動

# systemctl start cas-onappbk
# systemctl status cas-onappbk
# rbd showmapped

rbd rename vol_org vol_des -p pool02

rbd perf image iostat
one/one-75-289-0       18/s  19/s  590 KiB/s  1.6 KiB/s    4.28 ms    4.43 ms  
one/one-68-287-0       18/s   4/s  578 KiB/s  2.4 KiB/s    1.87 ms    1.41 ms  
one/one-28-317-0       13/s   0/s  915 KiB/s      0 B/s   10.94 ms    0.00 ns  
one/one-28-318-0       12/s   0/s  170 KiB/s   27 KiB/s    1.53 ms    6.02 ms

rbd perf image iotop
 >WRITES OPS    READS OPS  WRITE BYTES   READ BYTES    WRITE LAT     READ LAT IMAGE                                                      
        18/s         19/s    530 KiB/s    1.6 KiB/s      4.05 ms      3.97 ms one/one-75-288-0
        16/s         17/s    432 KiB/s    3.2 KiB/s	 2.89 ms      2.92 ms one/one-75-289-0
        16/s          4/s    449 KiB/s    3.2 KiB/s	 1.34 ms    921.76 us one/one-68-287-0
        10/s          0/s    111 KiB/s        0 B/s	 1.63 ms      0.00 ns one/one-55-219-0

「–watch-sec 1」で1秒ごとに更新

# ceph -s --watch-sec 1

# ceph osd status