Hi, I have created a ceph file system on a cluster running ceph v9.0.1 and have enable snapshots with the command:
ceph mds set allow_new_snaps true --yes-i-really-mean-it On the top level of the ceph file system, I can cd into the hidden .snap directory and I can create new directories with the mkdir command. I can cd into the newly created snap directory and can read the files under it. I cannot delete any snapshots. It reports a Read-only file system when I use the rm -rf command: /cephfs/.snap$ sudo rm -rf snap3 rm: cannot remove 'snap3/m/ede-c1-cent66-01/2015-07-07_17_28_56/1/2009/month_10/day_1/hour_1/data_file.1': Read-only file system rm: cannot remove 'snap3/m/ede-c1-cent66-01/2015-07-07_17_28_56/1/2009/month_10/day_1/hour_1/data_file.10': Read-only file system rm: cannot remove 'snap3/m/ede-c1-cent66-01/2015-07-07_17_28_56/1/2009/month_10/day_1/hour_1/data_file.100': Read-only file system ... I have tried this test with both the kernel driver and the fuse interface. My ceph file system clients are based on Ubuntu 14.04 using ceph v9.0.1 and the 4.1.0 Linux kernel. The exact kernel is: Linux version 4.1.0-040100-generic (kernel@gomeisa) (gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5) ) #201506220235 SMP Mon Jun 22 06:36:19 UTC 2015 ceph -v ceph version 9.0.1 (997b3f998d565a744bfefaaf34b08b891f8dbf64) I have also tried to remove .snap sub-directories in a directory 1 below the mount point, and that failed the same way as shown: # pwd cephfs/top1/.snap # ls _snap1_1 _snap2_1 _snap3_1 top1snap # rm -rf top1snap/ rm: cannot remove 'top1snap/10gb.dat': Read-only file system rm: cannot remove 'top1snap/10gb.dat-1': Read-only file system rm: cannot remove 'top1snap/one.txt': Read-only file system Should this work? Thanks, Eric
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