rbd在线扩容

查看image的空间大小

$ rbd info ceph0518/image01 --id jiaxzeng
rbd image 'image01':
        size 10 GiB in 2560 objects
        order 22 (4 MiB objects)
        snapshot_count: 0
        id: fc776d48a96c
        block_name_prefix: rbd_data.fc776d48a96c
        format: 2
        features: layering
        op_features: 
        flags: 
        create_timestamp: Wed May 18 10:30:49 2022
        access_timestamp: Wed May 18 10:30:49 2022
        modify_timestamp: Wed May 18 10:30:49 2022

扩容image的空间

$ rbd resize ceph0518/image01 --size 20G --id jiaxzeng
Resizing image: 100% complete...done.

$ rbd info ceph0518/image01 --id jiaxzeng             
rbd image 'image01':
        size 20 GiB in 5120 objects
        order 22 (4 MiB objects)
        snapshot_count: 0
        id: fc776d48a96c
        block_name_prefix: rbd_data.fc776d48a96c
        format: 2
        features: layering
        op_features: 
        flags: 
        create_timestamp: Wed May 18 10:30:49 2022
        access_timestamp: Wed May 18 10:30:49 2022
        modify_timestamp: Wed May 18 10:30:49 2022

在线扩容挂载点空间

xfs文件系统

$ df -Th /data
Filesystem     Type      Size  Used Avail Use% Mounted on
/dev/rbd0      xfs        10G   33M   10G   1% /data


$ sudo xfs_growfs /dev/rbd0
meta-data=/dev/rbd0              isize=512    agcount=16, agsize=163840 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=0 spinodes=0
data     =                       bsize=4096   blocks=2621440, imaxpct=25
         =                       sunit=1024   swidth=1024 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
log      =internal               bsize=4096   blocks=2560, version=2
         =                       sectsz=512   sunit=8 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
data blocks changed from 2621440 to 5242880

$ df -Th /data
Filesystem     Type  Size  Used Avail Use% Mounted on
/dev/rbd0      xfs    20G   34M   20G   1% /data

ext4文件系统

$ df -Th /app
Filesystem     Type      Size  Used Avail Use% Mounted on
/dev/rbd1      ext4      9.8G   37M  9.2G   1% /app

$ sudo resize2fs /dev/rbd1
resize2fs 1.42.9 (28-Dec-2013)
Filesystem at /dev/rbd1 is mounted on /app; on-line resizing required
old_desc_blocks = 2, new_desc_blocks = 3
The filesystem on /dev/rbd1 is now 5242880 blocks long.

$ df -Th /app/            
Filesystem     Type  Size  Used Avail Use% Mounted on
/dev/rbd1      ext4   20G   44M   19G   1% /app