GNU logs - #36169, boring messages

Message sent to bug-parted@HIDDEN:

Subject: bug#36169: Why does parted change ownerships of devices?
Resent-From: Guillaume Abrioux <gabrioux@HIDDEN>
Original-Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org>
Resent-CC: bug-parted@HIDDEN
Resent-Date: Tue, 11 Jun 2019 14:14:01 +0000
Resent-Message-ID: <handler.36169.B.156026242314614 <at> debbugs.gnu.org>
Resent-Sender: help-debbugs@HIDDEN
To: 36169 <at> debbugs.gnu.org
Cc: Dimitri Savineau <dsavinea@HIDDEN>, Sebastien Han <shan@HIDDEN>
MIME-Version: 1.0
From: Guillaume Abrioux <gabrioux@HIDDEN>
Date: Tue, 11 Jun 2019 11:23:47 +0200
Message-ID: <CANqTTH7Tijt1SiWx7qXOQtWv848nLtdUBrDZvcVtL13cizKECw@HIDDEN>
Content-Type: multipart/alternative; boundary="0000000000004590de058b08db1f"
Precedence: list
Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org
Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org>

--0000000000004590de058b08db1f
Content-Type: text/plain; charset="UTF-8"

Hello,

We use parted in ceph-ansible playbook [1] to retrieve some devices
information, the parted ansible module runs a parted/print command [2], but
we are facing an issue where ownerships get modified after that.

Doing the test manually without ansible context shows it's parted itself
which apply this change:

Before running parted on /dev/sdc:
[root@osd0 ~]# ls -l /dev/sdc*
brw-rw----. 1 root disk 8, 32 Jun 11 08:53 /dev/sdc
brw-rw----. 1 ceph ceph 8, 33 Jun 11 08:53 /dev/sdc1
brw-rw----. 1 ceph ceph 8, 34 Jun 11 08:53 /dev/sdc2

Running a basic parted/print:
[root@osd0 ~]# parted -s /dev/sdc print
Model: ATA QEMU HARDDISK (scsi)
Disk /dev/sdc: 53.7GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:

Number  Start   End     Size    File system  Name           Flags
 1      1049kB  1075MB  1074MB               ceph block.db
 2      1075MB  2149MB  1074MB               ceph block.db

We can see ownerships have changed from ceph:ceph to root:disk:
[root@osd0 ~]# ls -l /dev/sdc*
brw-rw----. 1 root disk 8, 32 Jun 11 08:57 /dev/sdc
brw-rw----. 1 root disk 8, 33 Jun 11 08:57 /dev/sdc1
brw-rw----. 1 root disk 8, 34 Jun 11 08:57 /dev/sdc2
[root@osd0 ~]#

I'm wondering whether there's a good reason for this or should it be
considered as a bug?


Thanks!


[1]
https://github.com/ceph/ceph-ansible/blob/master/roles/ceph-osd/tasks/main.yml#L39-L44
[2]
https://github.com/ansible/ansible/blob/devel/lib/ansible/modules/system/parted.py#L418


*Guillaume Abrioux*Senior Software Engineer

--0000000000004590de058b08db1f
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div style=3D"font-family:tahoma,sans-serif" class=3D"gmai=
l_default">Hello,</div><div style=3D"font-family:tahoma,sans-serif" class=
=3D"gmail_default"><br></div><div style=3D"font-family:tahoma,sans-serif" c=
lass=3D"gmail_default">We use parted in ceph-ansible playbook [1] to retrie=
ve some devices information, the parted ansible module runs a parted/print =
command [2], but we are facing an issue where ownerships get modified after=
 that.</div><div style=3D"font-family:tahoma,sans-serif" class=3D"gmail_def=
ault"><br></div><div style=3D"font-family:tahoma,sans-serif" class=3D"gmail=
_default">Doing the test manually without ansible context shows it&#39;s pa=
rted itself which apply this change:<br></div><div style=3D"font-family:tah=
oma,sans-serif" class=3D"gmail_default"><br></div><div style=3D"font-family=
:tahoma,sans-serif" class=3D"gmail_default">Before running parted on /dev/s=
dc:<br></div><div style=3D"font-family:tahoma,sans-serif" class=3D"gmail_de=
fault">[root@osd0 ~]# ls -l /dev/sdc*<br>brw-rw----. 1 root disk 8, 32 Jun =
11 08:53 /dev/sdc<br>brw-rw----. 1 ceph ceph 8, 33 Jun 11 08:53 /dev/sdc1<b=
r>brw-rw----. 1 ceph ceph 8, 34 Jun 11 08:53 /dev/sdc2</div><div style=3D"f=
ont-family:tahoma,sans-serif" class=3D"gmail_default"><br></div><div style=
=3D"font-family:tahoma,sans-serif" class=3D"gmail_default">Running a basic =
parted/print:<br></div><div style=3D"font-family:tahoma,sans-serif" class=
=3D"gmail_default">[root@osd0 ~]# parted -s /dev/sdc print =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 <br>Model: ATA QEMU HARDDISK (scsi)<br>Disk /de=
v/sdc: 53.7GB<br>Sector size (logical/physical): 512B/512B<br>Partition Tab=
le: gpt<br>Disk Flags: <br><br>Number =C2=A0Start =C2=A0 End =C2=A0 =C2=A0 =
Size =C2=A0 =C2=A0File system =C2=A0Name =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0=
 Flags<br>=C2=A01 =C2=A0 =C2=A0 =C2=A01049kB =C2=A01075MB =C2=A01074MB =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 ceph block.db<br>=C2=A02 =C2=
=A0 =C2=A0 =C2=A01075MB =C2=A02149MB =C2=A01074MB =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 ceph block.db<br><br></div><div style=3D"font-fami=
ly:tahoma,sans-serif" class=3D"gmail_default">We can see ownerships have ch=
anged from ceph:ceph to root:disk:<br></div><div style=3D"font-family:tahom=
a,sans-serif" class=3D"gmail_default">[root@osd0 ~]# ls -l /dev/sdc* =C2=A0=
 =C2=A0 =C2=A0 =C2=A0 <br>brw-rw----. 1 root disk 8, 32 Jun 11 08:57 /dev/s=
dc<br>brw-rw----. 1 root disk 8, 33 Jun 11 08:57 /dev/sdc1<br>brw-rw----. 1=
 root disk 8, 34 Jun 11 08:57 /dev/sdc2<br>[root@osd0 ~]#=C2=A0</div><div s=
tyle=3D"font-family:tahoma,sans-serif" class=3D"gmail_default"><br></div><d=
iv style=3D"font-family:tahoma,sans-serif" class=3D"gmail_default">I&#39;m =
wondering whether there&#39;s a good reason for this or should it be consid=
ered as a bug?</div><div><br></div><div><br></div><div><div style=3D"font-f=
amily:tahoma,sans-serif" class=3D"gmail_default">Thanks!</div><br></div><di=
v><br></div><div class=3D"gmail_default" style=3D"font-family:tahoma,sans-s=
erif">[1] <a href=3D"https://github.com/ceph/ceph-ansible/blob/master/roles=
/ceph-osd/tasks/main.yml#L39-L44" target=3D"_blank">https://github.com/ceph=
/ceph-ansible/blob/master/roles/ceph-osd/tasks/main.yml#L39-L44</a></div><d=
iv class=3D"gmail_default" style=3D"font-family:tahoma,sans-serif">[2] <a h=
ref=3D"https://github.com/ansible/ansible/blob/devel/lib/ansible/modules/sy=
stem/parted.py#L418" target=3D"_blank">https://github.com/ansible/ansible/b=
lob/devel/lib/ansible/modules/system/parted.py#L418</a></div><div><div dir=
=3D"ltr" class=3D"m_-3668428300458439501gmail_signature" data-smartmail=3D"=
gmail_signature"><div dir=3D"ltr"><div><div dir=3D"ltr"><div><div dir=3D"lt=
r"><div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr"><div=
 dir=3D"ltr"><div style=3D"background-color:rgb(253,253,253)"><span style=
=3D"color:rgb(102,102,102)"><span style=3D"font-size:x-large"><span style=
=3D"font-size:11pt"><b><br></b></span></span></span></div><div style=3D"bac=
kground-color:rgb(253,253,253)"><span style=3D"color:rgb(102,102,102)"><spa=
n style=3D"font-size:x-large"><span style=3D"font-size:11pt"><b>Guillaume A=
brioux<br></b></span></span><span style=3D"font-size:8pt">Senior Software E=
ngineer<br></span></span></div><span style=3D"color:rgb(102,102,102)"><span=
 style=3D"font-size:8pt"><span><span><span></span></span></span></span></sp=
an></div></div></div></div></div></div></div></div></div></div></div></div>=
</div>

--0000000000004590de058b08db1f--

Message sent:

Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
X-Mailer: MIME-tools 5.505 (Entity 5.505)
Content-Type: text/plain; charset=utf-8
X-Loop: help-debbugs@HIDDEN
From: help-debbugs@HIDDEN (GNU bug Tracking System)
To: Guillaume Abrioux <gabrioux@HIDDEN>
Subject: bug#36169: Acknowledgement (Why does parted change ownerships of
 devices?)
Message-ID: <handler.36169.B.156026242314614.ack <at> debbugs.gnu.org>
References: <CANqTTH7Tijt1SiWx7qXOQtWv848nLtdUBrDZvcVtL13cizKECw@HIDDEN>
X-Gnu-PR-Message: ack 36169
X-Gnu-PR-Package: parted
Reply-To: 36169 <at> debbugs.gnu.org
Date: Tue, 11 Jun 2019 14:14:04 +0000

Thank you for filing a new bug report with debbugs.gnu.org.

This is an automatically generated reply to let you know your message
has been received.

Your message is being forwarded to the package maintainers and other
interested parties for their attention; they will reply in due course.

Your message has been sent to the package maintainer(s):
 bug-parted@HIDDEN

If you wish to submit further information on this problem, please
send it to 36169 <at> debbugs.gnu.org.

Please do not send mail to help-debbugs@HIDDEN unless you wish
to report a problem with the Bug-tracking system.

--=20
36169: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D36169
GNU Bug Tracking System
Contact help-debbugs@HIDDEN with problems

Message sent to bug-parted@HIDDEN:

Subject: bug#36169: Why does parted change ownerships of devices?
Resent-From: "Brian C. Lane" <bcl@HIDDEN>
Original-Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org>
Resent-CC: bug-parted@HIDDEN
Resent-Date: Wed, 12 Jun 2019 18:33:01 +0000
Resent-Message-ID: <handler.36169.B36169.156036436613870 <at> debbugs.gnu.org>
Resent-Sender: help-debbugs@HIDDEN
To: 36169 <at> debbugs.gnu.org
Date: Wed, 12 Jun 2019 11:32:31 -0700
From: "Brian C. Lane" <bcl@HIDDEN>
Message-ID: <20190612182746.GB25631@HIDDEN>
References: <CANqTTH7Tijt1SiWx7qXOQtWv848nLtdUBrDZvcVtL13cizKECw@HIDDEN>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <CANqTTH7Tijt1SiWx7qXOQtWv848nLtdUBrDZvcVtL13cizKECw@HIDDEN>
User-Agent: Mutt/1.12.0 (2019-05-25)
Precedence: list
Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org
Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org>

On Tue, Jun 11, 2019 at 11:23:47AM +0200, Guillaume Abrioux wrote:
> Hello,
> 
> We use parted in ceph-ansible playbook [1] to retrieve some devices
> information, the parted ansible module runs a parted/print command [2], but
> we are facing an issue where ownerships get modified after that.
> 
> Doing the test manually without ansible context shows it's parted itself
> which apply this change:
> 
> Before running parted on /dev/sdc:
> [root@osd0 ~]# ls -l /dev/sdc*
> brw-rw----. 1 root disk 8, 32 Jun 11 08:53 /dev/sdc
> brw-rw----. 1 ceph ceph 8, 33 Jun 11 08:53 /dev/sdc1
> brw-rw----. 1 ceph ceph 8, 34 Jun 11 08:53 /dev/sdc2
> 
> Running a basic parted/print:
> [root@osd0 ~]# parted -s /dev/sdc print
> Model: ATA QEMU HARDDISK (scsi)
> Disk /dev/sdc: 53.7GB
> Sector size (logical/physical): 512B/512B
> Partition Table: gpt
> Disk Flags:
> 
> Number  Start   End     Size    File system  Name           Flags
>  1      1049kB  1075MB  1074MB               ceph block.db
>  2      1075MB  2149MB  1074MB               ceph block.db
> 
> We can see ownerships have changed from ceph:ceph to root:disk:
> [root@osd0 ~]# ls -l /dev/sdc*
> brw-rw----. 1 root disk 8, 32 Jun 11 08:57 /dev/sdc
> brw-rw----. 1 root disk 8, 33 Jun 11 08:57 /dev/sdc1
> brw-rw----. 1 root disk 8, 34 Jun 11 08:57 /dev/sdc2
> [root@osd0 ~]#
> 
> I'm wondering whether there's a good reason for this or should it be
> considered as a bug?

How did you set the ownership of the partition devices in the first place?
You can't just manually set the ownership and permissions of device
nodes, you need to use udev (which is responsible for creating them) to
do that.

parted tells the kernel to rescan the partitions, so the device entries
are probably being recreated by udev, changing their ownership back to
whatever udev thinks they should be.

-- 
Brian C. Lane (PST8PDT) - weldr.io - lorax - parted

Last modified: Mon, 25 Nov 2019 12:00:02 UTC

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997 nCipher Corporation Ltd, 1994-97 Ian Jackson.