Re: dashboard fails with error code 500 on a particular file system

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Hello Ernesto,

I found the reason. One of the users set a directory permission without the
+x bit (drw-------). After the command 'chmod 700' everything was OK again.
The MDS log did not help, but with the API call 'ls_dir?path=…' I was able
to iterate to the directory with the wrong permissions.

IMHO this is not an urgent problem , but an user should not be able to
crash the management interface of the admin.

Thanks for your patience
Erich


Am Mi., 19. Jan. 2022 um 18:00 Uhr schrieb Ernesto Puerta <
epuertat@xxxxxxxxxx>:

> Given the error returned from libcephfs is "cephfs.OSError: opendir
> failed: Permission denied [Errno 13]", it could be that the mgr doesn't
> have rights (ceph auth) to access the filesystem. Could you check the mds
> logs for any trace when the Dashboard error appears?
>
> Kind Regards,
> Ernesto
>
>
> On Wed, Jan 19, 2022 at 4:40 PM E Taka <0etaka0@xxxxxxxxx> wrote:
>
>> Hello Ernesto,
>>
>> the commands worked without any problems, with Ubuntus 20.04 Ceph packages
>> and inside "cephadm shell". I tried all 55k directories of the filesystem.
>>
>> Best,
>> Erich
>>
>> Am Mo., 17. Jan. 2022 um 21:10 Uhr schrieb Ernesto Puerta <
>> epuertat@xxxxxxxxxx>:
>>
>> > Hi E Taka,
>> >
>> > There's already a report of that issue in 16.2.5 (
>> > https://tracker.ceph.com/issues/51611), stating that it didn't happen
>> in
>> > 16.2.3 (so a regression then), but we couldn't reproduce it so far.
>> >
>> > I just tried creating a regular fresh cephfs filesystem (1 MDS), a
>> > directory inside it (via cephfs-shell) and I could access the directory
>> > from the dashboard with no issues. Is there anything specific on that
>> > deployment? The dashboard basically uses Python libcephfs
>> > <https://docs.ceph.com/en/latest/cephfs/api/libcephfs-py/> for
>> accessing
>> > Cephfs, so could you plz try the same and validate whether it works?
>> >
>> > >>> import cephfs
>> > >>> fs = cephfs.LibCephFS()
>> > >>> fs.conf_read_file('/etc/ceph/ceph.conf')
>> > >>> fs.mount(b'/', b'a')
>> > >>> fs.opendir('/test')
>> >
>> > # NO ERROR
>> >
>> >
>> > Kind Regards,
>> > Ernesto
>> >
>> >
>> > On Sun, Jan 16, 2022 at 11:26 AM E Taka <0etaka0@xxxxxxxxx> wrote:
>> >
>> >> Dashboard → Filesystems → (filesystem name) → Directories
>> >>
>> >> fails on a particular file system with error "500 - Internal Server
>> >> Error".
>> >>
>> >> The log shows:
>> >>
>> >>  Jan 16 11:22:18 ceph00 bash[96786]:   File
>> >> "/usr/share/ceph/mgr/dashboard/services/cephfs.py", line 57, in opendir
>> >>  Jan 16 11:22:18 ceph00 bash[96786]:     d = self.cfs.opendir(dirpath)
>> >>  Jan 16 11:22:18 ceph00 bash[96786]:   File "cephfs.pyx", line 942, in
>> >> cephfs.LibCephFS.opendir
>> >>  Jan 16 11:22:18 ceph00 bash[96786]: cephfs.OSError: opendir failed:
>> >> Permission denied [Errno 13]
>> >>  Jan 16 11:22:18 ceph00 bash[96786]: [::ffff:10.149.249.237:47814]
>> [GET]
>> >> [500] [0.246s] [admin] [513.0B] /ui-api/cephfs/3/ls_dir
>> >>  Jan 16 11:22:18 ceph00 bash[96786]: [b'{"status": "500 Internal Server
>> >> Error", "detail": "The server encountered an unexpected condition which
>> >> prevented it from fulfilling the request.", "request_id":
>> >> "76727248-cf64-4b85-8630-8131e33832f8"}
>> >>
>> >> Do you have an idea what went wrong hore and how can I solve this
>> issue?
>> >>
>> >> Thanks!
>> >> Erich
>> >> _______________________________________________
>> >> ceph-users mailing list -- ceph-users@xxxxxxx
>> >> To unsubscribe send an email to ceph-users-leave@xxxxxxx
>> >>
>> >
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>>
>
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