Re: [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
>
> ccdew...@uncc.edu  *| *https://oneit.uncc.edu
>
> 
>
>
>
> On Tue, Dec 15, 2020 at 8:02 AM Robert Redl  > 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.]
>
>
> ___
> lustre-discuss mailing list
> lustre-discuss@lists.lustre.org
> 
> http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org
>



signature.asc
Description: OpenPGP digital signature
___
lustre-discuss mailing list
lustre-discuss@lists.lustre.org
http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org

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

[Chad DeWitt]

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

ccdew...@uncc.edu *| *https://oneit.uncc.edu




On Tue, Dec 15, 2020 at 8:02 AM Robert Redl  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.]
>
>
> ___
> lustre-discuss mailing list
> lustre-discuss@lists.lustre.org
> http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org
>
___
lustre-discuss mailing list
lustre-discuss@lists.lustre.org
http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org

[lustre-discuss] permission denied for some files

[Robert Redl]

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



signature.asc
Description: OpenPGP digital signature
___
lustre-discuss mailing list
lustre-discuss@lists.lustre.org
http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org