ceph之ceph-client安装

1、安装ceph-client

ceph-deploy  install ceph-client

2、创建块设备

[root@mon1 ~]# rbd create test1 --image-format 1 --size 5G

rbd: image format 1 is deprecated
[root@mon1 ~]#

[root@mon1 ~]# rbd info test1
rbd image 'test1':
    size 5120 MB in 1280 objects
    order 22 (4096 kB objects)
    block_name_prefix: rb.0.20bd3.2ae8944a
    format: 1
[root@mon1 ~]#

3、映射

[root@mon1 ~]# rbd map test1
/dev/rbd0

[root@mon1 ~]# rbd showmapped
id pool image snap device
0  rbd  test1 -    /dev/rbd0

4、格式化

[cephuser@ceph-admin rbd]$ sudo mkfs.ext4 -q /dev/rbd/rbd/test1

[root@mon1 ~]# lsblk
NAME   MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sr0     11:0    1  422K  0 rom
vda    253:0    0   20G  0 disk
└─vda1 253:1    0   20G  0 part /
rbd0   252:0    0    5G  0 disk

5、挂载

[root@mon1 ~]# mkdir -p /mnt/rbd-test1
[root@mon1 ~]# mount /dev/rbd0 /mnt/rbd-test1/

6、查看

[root@mon1 ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sr0 11:0 1 422K 0 rom
vda 253:0 0 20G 0 disk
└─vda1 253:1 0 20G 0 part /
rbd0 252:0 0 5G 0 disk /mnt/rbd-test1

7、设置自动map

[root@mon1 ~]# vim /etc/ceph/rbdmap

rbd/test1   id=admin,keyring=/etc/ceph/ceph.client.admin.keyring

8、修改fstab

[root@mon1 ~]# vim /etc/fstab
/dev/rbd/rbd/test1  /mnt/rbd-test1  ext4    defaults,noatime,_netdev         0 0

9、设置rbdmap开机启动

systemctl enable rbdmap

ps:设置开机启动后，磁盘总是挂载不上，发现systemctl is-enable rbdmap是static状态，不是enable，经查，这里的static是指Unit的文件中没有[Install]区域，因此需要添加此区域，即

vim /usr/lib/systemd/system/rbdmap.servic
[Install]
WantedBy=multi-user.target

10、重启

reboot或systemctl restart rbdmap

11、rbd扩容

[root@mon1 ~]# rbd resize rbd/test1 --size 10G
Resizing image: 100% complete...done.

[root@mon1 ~]# resize2fs /mnt/rbd-test1
resize2fs 1.42.9 (28-Dec-2013)
open: Is a directory while opening /mnt/rbd-test1
[root@mon1 ~]# resize2fs /dev/rbd/rbd/test1
resize2fs 1.42.9 (28-Dec-2013)
Filesystem at /dev/rbd/rbd/test1 is mounted on /mnt/rbd-test1; on-line resizing required
old_desc_blocks = 1, new_desc_blocks = 2
The filesystem on /dev/rbd/rbd/test1 is now 2621440 blocks long.

12、删除rbd

[root@mon1 ~]# umount /mnt/rbd-test1/ [root@mon1 ~]# vim /etc/ceph/rbdmap rbd/test1 id=admin,keyring=/etc/ceph/ceph.client.admin.keyring #删除 [root@mon1 ~]# vim /etc/fstab

/dev/rbd/rbd/test1  /mnt/rbd-test1  ext4    defaults,noatime,_netdev         0 0   #删除

13、创建快照

[root@mon1 ~]# rbd snap create test3@snap-test3

14、查看快照

[root@mon1 ~]# rbd snap ls test3
SNAPID NAME          SIZE
     4 snap-test3 2048 MB

15、快照回滚

[root@mon1 ~]# rbd snap rollback test3@snap-test3
Rolling back to snapshot: 100% complete...done.

ps：回滚以后要重新挂载卷

16、删除快照

[root@mon1 ~]# rbd snap rm test3@snap-test3
删除快照是指删除某个特定的快照

17、清除快照

[root@mon1 ~]# rbd snap purge test3
Removing all snapshots: 100% complete...done.

ps:清除快照是指删除该rbd的所有快照

18、保护快照

[root@mon1 ~]# rbd snap protect test4@snap-test

ps:被保护的快照的format类型必须是format 2

19、快照克隆

[root@mon1 ~]# rbd clone test4@snap-test snap-test-clone

[root@mon1 ~]# rbd list
chen
snap-test-clone
test
test2
test4
[root@mon1 ~]#