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Ceph rbd online resize

Before capacity expansion

[root@mon0 ceph] # rbd create myrbd/rbd1-s 1024-- image-format=2 [root@mon0 ceph] # rbd ls myrbdrbd1 [root@mon0 ceph] # rbd info myrbd/rbd1rbd image 'rbd1': size 1024 MB in 256 objects order 22 (4096 kB objects) block_name_prefix: rbd_data.12ce6b8b4567 format: 2 features: layering

Expand capacity

[root@mon0 ceph] # rbd resize myrbd/rbd1-s 2048Resizing image: 100% complete...done.

Before rbd1 is formatted and mounted, resize is fine. If the rbd1 has been formatted and mounted, some additional actions are required:

[root@mon0 ceph] # rbd map myrbd/rbd1 [root@mon0 ceph] # rbd showmappedid pool image snap device 0 test test.img-/ dev/rbd0 1 myrbd rbd1-/ dev/rbd1 [root@mon0 ceph] # mkfs.xfs / dev/rbd1log stripe unit (4194304 bytes) is too large (maximum is 256KiB) log stripe unit adjusted to 32KiBmeta-data=/dev/rbd1 isize=256 agcount=9, agsize=64512 blks = sectsz=512 attr=2 Projid32bit=0data = bsize=4096 blocks=524288, imaxpct=25 = sunit=1024 swidth=1024 blksnaming = version 2 bsize=4096 ascii-ci=0log = internal log bsize=4096 blocks=2560, version=2 = sectsz=512 sunit=8 blks, lazy-count=1realtime = none extsz=4096 blocks=0 Rtextents=0 [root@mon0 ceph] # mount / dev/rbd1 / mnt [root@mon0 ceph] # df-hFilesystem Size Used Avail Use% Mounted on/dev/sda1 529G 20G 482G 4% / tmpfs 16G 408K 16G 1% / dev/shm/dev/sdb 559G 33G 527G 6% / openstack/dev/sdc 1.9T 75M 1.9T 1% / cephmp1/dev/sdd 1.9T 61m 1. 9T 1% / cephmp2/dev/rbd1 2.0G 33M 2.0G 2% / mnt [root@mon0 ceph] # rbd resize myrbd/rbd1-s 4096Resizing image: 100% complete...done. [root@mon0 ceph] # df-hFilesystem Size Used Avail Use% Mounted on/dev/sda1 529G 20G 482G 4% / tmpfs 16G 408K 16G 1% / dev/shm/dev/sdb 559G 33G 527G 6% / openstack/dev/sdc 1.9T 75M 1.9T 1% / cephmp1/dev/sdd 1.9T 61M 1.9T 1% / cephmp2/dev/rbd1 2.0G 33M 2.0G 2% / mnt [root@mon0 ceph] # xfs_growfs / mntmeta-data=/dev/rbd1 isize=256 agcount=9 Agsize=64512 blks = sectsz=512 attr=2, projid32bit=0data = bsize=4096 blocks=524288, imaxpct=25 = sunit=1024 swidth=1024 blksnaming = version 2 bsize=4096 ascii-ci=0log = internal bsize=4096 blocks=2560, version=2 = sectsz=512 sunit=8 blks, lazy-count=1realtime = none extsz=4096 blocks=0 Rtextents=0data blocks changed from 524288 to 1048576 [root@mon0 ceph] # df-hFilesystem Size Used Avail Use% Mounted on/dev/sda1 529G 20G 482G 4% / tmpfs 16G 408K 16G 1% / dev/shm/dev/sdb 559G 33G 527G 6% / openstack/dev/sdc 1.9T 75M 1.9T 1% / cephmp1/dev/sdd 1.9T 61M 1.9T 1% / cephmp2/ Dev/rbd1 4.0G 33m 4.0G 1% / mnt

In another case, rbd1 has been mounted to a vm:

Virsh domblklist myvmrbd resize myrbd/rbd1# here needs to operate through virsh blockresize virsh blockresize-- domain myvm-- path vdb-- size 100Grbd info myrbd/rbd1 is all the content of this article "sample Analysis of ceph rbd online resize", thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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