ceph集群jewel版本部署osd激活权限报错
ceph集群jewel版本部署，osd 激活报错：集群部署过程中执行osd激活操作如下：
sudo ceph-deploy osd activate ceph21:/dev/sdc1:/dev/sdj3
报错内容如下：
got monmap epoch 1
command_check_call: Running command: /usr/bin/ceph-osd --cluster ceph --mkfs --mkkey -i 1 --monmap /var/lib/ceph/tmp/mnt.u8rJvJ/activate.monmap --osd-data /var/lib/ceph/tmp/mnt.u8rJvJ --osd-journal /var/lib/ceph/tmp/mnt.u8rJvJ/journal --osd-uuid f7e5f270-5c59-4c22-83cd-bbe191f40b72 --keyring /var/lib/ceph/tmp/mnt.u8rJvJ/keyring --setuser ceph --setgroup ceph
2016-05-19 15:54:36.539645 7f5eb857b800 -1 filestore(/var/lib/ceph/tmp/mnt.u8rJvJ) mkjournal error creating journal on /var/lib/ceph/tmp/mnt.u8rJvJ/journal: (13) Permission denied
2016-05-19 15:54:36.539664 7f5eb857b800 -1 OSD::mkfs: ObjectStore::mkfs failed with error -13
2016-05-19 15:54:36.539719 7f5eb857b800 -1** ERROR: error creating empty object store in /var/lib/ceph/tmp/mnt.u8rJvJ: (13) Permission denied
mount_activate: Failed to activate
unmount: Unmounting /var/lib/ceph/tmp/mnt.u8rJvJ
command_check_call: Running command: /bin/umount -- /var/lib/ceph/tmp/mnt.u8rJvJ
Traceback (most recent call last):
File "/usr/sbin/ceph-disk", line 9, in
load_entry_point('ceph-disk==1.0.0', 'console_scripts', 'ceph-disk')()
File "/usr/lib/python2.7/site-packages/ceph_disk/main.py", line 4964, in run
main(sys.argv)
File "/usr/lib/python2.7/site-packages/ceph_disk/main.py", line 4915, in main
args.func(args)
File "/usr/lib/python2.7/site-packages/ceph_disk/main.py", line 3269, in main_activate
reactivate=args.reactivate,
File "/usr/lib/python2.7/site-packages/ceph_disk/main.py", line 3026, in mount_activate
(osd_id, cluster) = activate(path, activate_key_template, init)
File "/usr/lib/python2.7/site-packages/ceph_disk/main.py", line 3202, in activate
keyring=keyring,
File "/usr/lib/python2.7/site-packages/ceph_disk/main.py", line 2695, in mkfs
'--setgroup', get_ceph_group(),
File "/usr/lib/python2.7/site-packages/ceph_disk/main.py", line 439, in command_check_call
return subprocess.check_call(arguments)
File "/usr/lib64/python2.7/subprocess.py", line 542, in check_call
raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['/usr/bin/ceph-osd', '--cluster', 'ceph', '--mkfs', '--mkkey', '-i', '1', '--monmap', '/var/lib/ceph/tmp/mnt.u8rJvJ/activate.monmap', '--osd-data', '/var/lib/ceph/tmp/mnt.u8rJvJ', '--osd-journal', '/var/lib/ceph/tmp/mnt.u8rJvJ/journal', '--osd-uuid', 'f7e5f270-5c59-4c22-83cd-bbe191f40b72', '--keyring', '/var/lib/ceph/tmp/mnt.u8rJvJ/keyring', '--setuser', 'ceph', '--setgroup', 'ceph']' returned non-zero exit status 1
RuntimeError: command returned non-zero exit status: 1
RuntimeError: Failed to execute command: /usr/sbin/ceph-disk -v activate --mark-init systemd --mount /dev/sdb1
解决办法：
解决办法很简单，将ceph集群需要使用的所有磁盘权限，所属用户、用户组改给ceph
chown ceph:ceph /dev/sdd1
问题延伸：
此问题本次修复后，系统重启磁盘权限会被修改回，导致osd服务无法正常启动，这个权限问题很坑，写了个for 循环，加入到rc.local,每次系统启动自动修改磁盘权限；
for i in a b c d e f g h i l j k;do chown ceph.ceph /dev/sd"$i"*;done
查找ceph资料，发现这其实是一个bug，社区暂未解决。
参考信息：
http://tracker.ceph.com/issues/13833
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