Re: [ovirt-devel] ovirt nfs mount caused sanlock failed to access data storage
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On Tue, Sep 12, 2017 at 2:58 PM pengyixiang <yxpengi386@163.com> wrote:
I know that, after nfs mounted in client, it used nfs server's permission, although i don't know why it's this, but i execute as follows in nfs server: # useradd sanlock -u 114 # usermod -a -G kvm sanlock
then it's works well!
thanks anyhow!
You don't need to add sanlock on the nfs server. This setup is documented here: https://ovirt.org/documentation/admin-guide/chap-Storage/#preparing-and-addi... Nir
At 2017-09-12 18:47:55, "pengyixiang" <yxpengi386@163.com> wrote:
hello Nir I just do a test, as follows, i add linx to group kvm # cat /etc/group | grep "kvm" kvm:x:112:qemu,vdsm,linx,sanlock
and i see the permission of leases of nfs storage: $ ls -l /rhev/data-center/mnt/192.168.11.55\:_home_dataStorage/1845be22-1ac4-4e42-bbcb-7ba9ccd6e569/dom_md/leases
-rw-rw---- 1 vdsm kvm 2097152 9月 11 19:21 /rhev/data-center/mnt/192.168.11.55: _home_dataStorage/1845be22-1ac4-4e42-bbcb-7ba9ccd6e569/dom_md/leases
sanlock cannot read it 425138 resource = sanlock.read_resource(lease.path, lease.offset) 425139 SanlockException: (13, 'Sanlock resource read failure', 'Permission denied')
and i cannot change to sanlock like that: # su sanlock root@Node:~#
so i add a user linx to group kvm, and access to a o660 file with vdsm:kvm as follows: $ ls -l 总用量 16 -rw-rw---- 1 vdsm kvm 6 9月 11 20:06 1.txt drwxr-xr-x 9 linx linx 4096 9月 1 15:58 linx-virtualization drw-rw---- 3 linx linx 4096 9月 11 20:13 test2 drw-rw---- 2 linx linx 4096 9月 11 20:19 test3
then we can view the file in user "linx": $ cat ~/1.txt pencc
then i create 1.txt as same as ~/1.txt in nfs mount point like that with permission o666 vdsm:kvm : /rhev/data-center/mnt/192.168.11.55 \:_home_dataStorage/1845be22-1ac4-4e42-bbcb-7ba9ccd6e569/1.txt
then i read it, but failed too Permission denied
if i change 1.txt's permission in mount point to o666
then i can read it succeed.
i think, maybe nfs's mount caused group permission failed, group permission as the second '6' of o666
i cannot understand it, this my nfs-server's exports configurations: /home/dataStorage *(rw,sync,no_subtree_check)
have any ideas? QAQ
在 2017-09-12 18:06:08，"Nir Soffer" <nsoffer@redhat.com> 写道：
On Tue, 12 Sep 2017, 4:52 pengyixiang <yxpengi386@163.com> wrote:
hello,everyone sanlock failed due to cannot read nfs storage's data , i tried to chmod 777 /rhev/data-center/mnt/192.168.11.55\:_home_dataStorage/1845be22-1ac4-4e42-bbcb-7ba9ccd6e569/dom_md/*(add others permission), then it's ok
sanlock's log: 425120 Traceback (most recent call last): 425121 File "/usr/lib/python2.7/dist-packages/vdsm/storage/task.py", line 878, in _run 425122 return fn(*args, **kargs) 425123 File "/usr/lib/python2.7/dist-packages/vdsm/logUtils.py", line 52, in wrapper 425124 res = f(*args, **kwargs) 425125 File "/usr/share/vdsm/storage/hsm.py", line 619, in getSpmStatus 425126 status = self._getSpmStatusInfo(pool) 425127 File "/usr/share/vdsm/storage/hsm.py", line 613, in _getSpmStatusInfo 425128 (pool.spmRole,) + pool.getSpmStatus())) 425129 File "/usr/share/vdsm/storage/sp.py", line 141, in getSpmStatus 425130 return self._backend.getSpmStatus() 425131 File "/usr/share/vdsm/storage/spbackends.py", line 433, in getSpmStatus 425132 lVer, spmId = self.masterDomain.inquireClusterLock() 425133 File "/usr/share/vdsm/storage/sd.py", line 817, in inquireClusterLock 425134 return self._manifest.inquireDomainLock() 425135 File "/usr/share/vdsm/storage/sd.py", line 522, in inquireDomainLock 425136 return self._domainLock.inquire(self.getDomainLease()) 425137 File "/usr/lib/python2.7/dist-packages/vdsm/storage/clusterlock.py", line 372, in i nquire 425138 resource = sanlock.read_resource(lease.path, lease.offset) 425139 SanlockException: (13, 'Sanlock resource read failure', 'Permission denied')
i test it, and in node,I add user "linx" to group "kvm" $ cat /etc/group | grep "kvm" kvm:x:112:qemu,vdsm,linx,sanlock
then i create a file in $HOME: $ ls -l 总用量 16 -rw-rw---- 1 vdsm kvm 6 9月 11 20:06 1.txt drwxr-xr-x 9 linx linx 4096 9月 1 15:58 linx-virtualization drw-rw---- 3 linx linx 4096 9月 11 20:13 test2 drw-rw---- 2 linx linx 4096 9月 11 20:19 test3
then we can view the file in user "linx": $ cat 1.txt pencc
leases if vdsm:kvm too: $ ls -l /rhev/data-center/mnt/192.168.11.55\:_home_dataStorage/1845be22-1ac4-4e42-bbcb-7ba9ccd6e569/dom_md/leases
-rw-rw---- 1 vdsm kvm 2097152 9月 11 19:21 /rhev/data-center/mnt/192.168.11.55: _home_dataStorage/1845be22-1ac4-4e42-bbcb-7ba9ccd6e569/dom_md/leases
but we cannot read the file in user "linx": $ cat /rhev/data-center/mnt/192.168.11.55 \:_home_dataStorage/1845be22-1ac4-4e42-bbcb-7ba9ccd6e569/dom_md/leases cat: '/rhev/data-center/mnt/192.168.11.55:_home_dataStorage/1845be22-1ac4-4e42-bbcb-7ba9ccd6e569/dom_md/leases': 权限不够
why is this? follows the nfs server configure # cat /etc/exports
/home/dataStorage 192.168.11.*(rw,sync) /home/dataStorage2 192.168.11.*(rw,sync,no_root_squash,no_subtree_check) /home/isoStorage 192.168.11.*(rw,sync,no_root_squash,no_subtree_check)
Is my nfs-server configurations miss some arguments? have any idea?
Try to setup a supported system (e.g centos, fedora) and compare the setup.
Can explain why user linx need access to vdsm/sanlock/qemu data?
Nir
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