[lustre-discuss] [EXTERNAL] permission denied for some files

[Robert Redl]

Dear Chad,

thanks a lot! That is apparently the solution. The files did have the
immutable attribute set:

lsattr file
----i----------- file

removing it with:

chattr -i file

fixed the problem.

I have no idea how this attribute was set, but at least now I know how
to remove it.

Thank you!
Robert

On 15.12.20 14:16, Chad DeWitt wrote:
> Hi Robert,
>
> Just rolling dice, but is it possible that the append only attribute
> is set on the files in question?
>
> For instance, I have the attribute set on a file named /testing/ (the
> append attribute is shown by the 'a' flag):
>
>     # lsattr testing
>     -----a---------- testing
>
> When I try to remove /testing/ with the append flag set:
>
>     # rm testing
>     rm: remove regular empty file ‘testing’? y
>     rm: cannot remove ‘testing’: Operation not permitted
>
>
> If that flag is set on your problematic files, the unsetting the flag
> will allow you to delete them:
>
>     # chattr -a testing
>     # rm testing
>     rm: remove regular empty file ‘testing’? y
>
>
> BTW - You have to use lsattr to see the append flag; a normal ls will
> not show it...
>
> Chad
>
> ------------------------------------------------------------
>
> Chad DeWitt, CISSP | University Research Computing
>
> UNC Charlotte *| *Office of OneIT
>
> ccdewitt at uncc.edu <mailto:ccdewitt at uncc.edu> *| *https://oneit.uncc.edu
>
> ------------------------------------------------------------
>
>
>
> On Tue, Dec 15, 2020 at 8:02 AM Robert Redl <robert.redl at lmu.de
> <mailto:robert.redl at lmu.de>> wrote:
>
>     Dear Lustre Users,
>
>     we have some files in the system, that are not writable anymore.
>     Symptoms:
>
>     - normal rm fails: rm: cannot remove 'file': Operation not permitted.
>     - lfs rmfid fails without error message. The file is just not deleted.
>     - lfs migrate fails: file: no write permission, skipped
>     - all commands are executes as root on a node which is listed in
>     nosquash_nids.
>     - other files with the same permissions located in the same folder
>     are writable.
>     - the affected file are readable. Creating a copy is possible, but
>     deleting the original file not.
>     - the problem remains after running lfsck.
>
>     We use Lustre 2.12.5 on Centos 7 with ZFS backend.
>
>     Has anyone had such issues before? Any ideas how to delete these
>     files?
>
>     Thank you!
>     Robert
>
>     -- 
>
>     Dr. Robert Redl
>     Scientific Programmer, "Waves to Weather" (SFB/TRR165)
>     Meteorologisches Institut
>     Ludwig-Maximilians-Universität München
>     Theresienstr. 37, 80333 München, Germany
>
>     [Caution: Email from External Sender. Do not click or open links
>     or attachments unless you know this sender.]
>
>
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