<div dir="ltr"><div><div><div><div><div><div><div>Hi,<br></div>I'm trying to configure Cinder with NFS from a Fujitsu Eternus DX.<br></div>Mounting the remote resource works fine, but when I try to create<br></div>a volume, I get a "Permission denied" in the logs.<br></div><br></div>The Fujitsu Eternus DX (192.168.1.101) unit has a directory exported:<br>$ showmount -e 192.168.1.101<br>Export list for <a href="http://192.168.1.101">192.168.1.101</a>:<br>/mnt/nas/ <a href="http://192.168.0.0/22">192.168.0.0/22</a><br><br></div><div>This directory is owned by uid=102 and gid=201.<br></div><div><br></div><div><br></div><div>In the storage node, the configuration files are:<br><br></div>- /etc/cinder/cinder.conf<br></div>[DEFAULT]<br><div>nfs_shares_config = /etc/cinder/nfsshares<br>volume_driver = cinder.volume.drivers.nfs.NfsDriver<br>[...]<br><br>- /etc/cinder/nfsshares<br>192.168.1.101:/mnt/nas/<br><br></div><div>I have changed the uid and gid of the user cinder, in order to have the<br></div><div>mentioned uid and gid:<br># id cinder<br>uid=102(cinder) gid=201(cinder) groups=201(cinder),99(nobody)<br></div><div><br></div><div>When I start the service, the remote resource is mounted:<br>$ df -h<br>Filesystem Size Used Avail Use% Mounted on<br>[...]<br>192.168.1.101:/mnt/nas/ 59T 423G 58T 1% /var/lib/cinder/mnt/9ae799cf301b19940950ae49dd800c51<br><br># ls -l /var/lib/cinder/mnt/9ae799cf301b19940950ae49dd800c51/<br>drwxrwxr-x. 15 cinder cinder 1024 Jul 30 09:55 cust<br><br># ls -ln /var/lib/cinder/mnt/9ae799cf301b19940950ae49dd800c51/<br>drwxrwxr-x. 15 102 201 1024 Jul 30 09:55 cust<br><br><br></div><div>But when I try to create a volume from another node (controller) with:<br>$ cinder create --display-name myvol 1<br><br></div><div>I get the following message in the storage node (/var/log/cinder/volume.log):<br>2015-07-31 02:45:19.325 28370 ERROR oslo_messaging.rpc.dispatcher [req-047ed05d-cd56-410a-afa6-85a4db59728a 751edd7ef0494970bbeecaa5d2861450 f3680324d5124f8ca5937c310881cdb7 - - -] Exception during message handling: Unexpected error while running command.<br>Command: None<br>Exit code: -<br>Stdout: u"Unexpected error while running command.\nCommand: sudo cinder-rootwrap /etc/cinder/rootwrap.conf truncate -s 1G /var/lib/cinder/mnt/9ae799cf301b19940950ae49dd800c51/volume-4ee83412-bf7d-4cd2-ae74-cffd5af3adc7\nExit code: 1\nStdout: u''\nStderr: '/bin/truncate: cannot open \\xe2\\x80\\x98/var/lib/cinder/mnt/9ae799cf301b19940950ae49dd800c51/volume-4ee83412-bf7d-4cd2-ae74-cffd5af3adc7\\xe2\\x80\\x99 for writing: Permission denied\\n'"<br>Stderr: None<br><br></div><div><div><div><div><div><div><div><div><br>As expected, if I try to manually run the same problematic command as root, I get the same error:<br># sudo cinder-rootwrap /etc/cinder/rootwrap.conf truncate -s 1G /var/lib/cinder/mnt/9ae799cf301b19940950ae49dd800c51/volume-4ee83412-bf7d-4cd2-ae74-cffd5af3adc7<br>/bin/truncate: cannot open ‘/var/lib/cinder/mnt/9ae799cf301b19940950ae49dd800c51/volume-4ee83412-bf7d-4cd2-ae74-cffd5af3adc7’ for writing: Permission denied<br><br></div><div>But if I run it as cinder user, all is fine:<br>[root@storage-node cinder]# su -c "truncate -s 1G /var/lib/cinder/mnt/9ae799cf301b19940950ae49dd800c51/volume-4ee83412-bf7d-4cd2-ae74-cffd5af3adc7" cinder<br>[root@storage-node cinder]# ls -l /var/lib/cinder/mnt/9ae799cf301b19940950ae49dd800c51/volume-4ee83412-bf7d-4cd2-ae74-cffd5af3adc7<br>-rw-r--r--. 1 cinder cinder 1073741824 Jul 31 02:51 /var/lib/cinder/mnt/9ae799cf301b19940950ae49dd800c51/volume-4ee83412-bf7d-4cd2-ae74-cffd5af3adc7<br><br><br></div><div>Why Cinder is not able to write to the mounted directory?<br></div><div>Should Cinder be forced to write to the mounted directory as cinder user? How?<br></div><div><br><br></div><div>Francesc<br></div><div><br><br></div><div><div><div><div><br>-- <br><div class="gmail_signature"><div dir="ltr">Francesc Pinyol Margalef<br><a href="http://www.francescpinyol.cat/" target="_blank">http://www.francescpinyol.cat/</a></div></div>
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