ceph中用sgdisk工具进行分区--------固定uuid

• ceph中两种类型分区的type code:

type	type code
journal	45b0969e-9b03-4f30-b4c6-b4b80ceff106
osd	4fbd7e29-9d25-41b8-afd0-062c0ceff05d

• 有人会好奇为啥要给分区设置固定的uuid呢，原因是ceph通过uuid来区分你是osd分区还是journal分区之后，再决定数据放在哪里
• 参考文档有解释：http://www.cnblogs.com/gzxbkk/p/7737421.html

• 总结:
  ceph中创建journal分区和data分区：
  sgdisk -n {part num}:0:+{part size}G {disk} -t {part num}:4fbd7e29-9d25-41b8-afd0-062c0ceff05d -c {part num}:”ceph data”
  sgdisk -n {part num}:0:+{part size}G {disk} -t {part num}:45b0969e-9b03-4f30-b4c6-b4b80ceff106 -c {part num}:”ceph journal”

• 示例:

• 使用sgdisk创建分区

root@host1:~# sgdisk -n 1:0:+20G /dev/nvme0n1 -t 1:45b0969e-9b03-4f30-b4c6-b4b80ceff106 -c 1:"ceph journal"
Creating new GPT entries.
The operation has completed successfully.

root@host1:~# sgdisk -n 2:0:+20G /dev/nvme0n1 -t 2:45b0969e-9b03-4f30-b4c6-b4b80ceff106 -c 2:"ceph journal"
The operation has completed successfully.

root@host1:~# sgdisk -n 3:0:+150G /dev/nvme0n1 -t 3:4fbd7e29-9d25-41b8-afd0-062c0ceff05d -c 3:"ceph data"
The operation has completed successfully.

root@host1:~# sgdisk -n 4:0:+150G /dev/nvme0n1 -t 4:4fbd7e29-9d25-41b8-afd0-062c0ceff05d -c 4:"ceph data"
The operation has completed successfully.

root@host1:~# ceph-disk list
/dev/nvme0n1 :
 /dev/nvme0n1p1 ceph journal
 /dev/nvme0n1p2 ceph journal
 /dev/nvme0n1p3 ceph data, unprepared
 /dev/nvme0n1p4 ceph data, unprepared