multipath-tools already carries the patches to synchronize with udev; so does parted. This should fix the issues with "device is busy" messages when doing the partitioning (but it looks as though there can still be some), and on xenial I can verify that there is just one device being created.
I've tested the patches for parted / multipath-tools on trusty and things look like they work correctly (again, aside from the "device is busy" errors, but the correct device node is created anyway). ** Description changed: + [Impact] + Admins who use parted to partition a multipath device after installation will find that more than one device may be generated for the same partition: one in the form XXXXpN, and one in the form XXXX-partN. + + [Test case] + See below; use parted to partition a multipath device. + + [Regression Potential] + Scripted tools which deal with the partitioning via parted and would depend on the devices from multipath being named "XXXXpN" will find that the device node is no longer available, since it was chosen to align with general udev rules for multipath coming from udev and multipath-tools, using the "XXXX-partN" form. + + --- + Problem Description ============================= Two deivce created when creating 1 partition on a mpath device: % sudo parted /dev/mapper/mpath2 GNU Parted 2.3 Using /dev/mapper/mpath2 Welcome to GNU Parted! Type 'help' to view a list of commands. (parted) p Model: Linux device-mapper (multipath) (dm) Disk /dev/mapper/mpath2: 284GB Sector size (logical/physical): 512B/4096B Partition Table: msdos Number Start End Size Type File system Flags (parted) mkpart mkpart mkpartfs (parted) mkpart Partition type? primary/extended? primary File system type? [ext2]? Start? 0% End? 10% Device /dev/mapper/mpath2p1 not found device-mapper: table ioctl on failed: No such device or address Device /dev/mapper/mpath2p1 not found device-mapper: table ioctl on failed: No such device or address (parted) p Model: Linux device-mapper (multipath) (dm) Disk /dev/mapper/mpath2: 284GB Sector size (logical/physical): 512B/4096B Partition Table: msdos Number Start End Size Type File system Flags - 1 1049kB 28.4GB 28.4GB primary + 1 1049kB 28.4GB 28.4GB primary (parted) q Information: You may need to update /etc/fstab. % ls /dev/mapper/mpath2* /dev/mapper/mpath2 /dev/mapper/mpath2p1 /dev/mapper/mpath2-part1 - % + % Steps to Reproduce =================================== 1. install ubuntu 14.04.3 on a system which has mpath device 2. try to partition the mpath device, add one partition - + ---uname output--- Linux dilllp1 3.19.0-22-generic #22~14.04.1-Ubuntu SMP Wed Jun 17 10:03:39 UTC 2015 ppc64le ppc64le ppc64le GNU/Linux - Userspace tool common name: parted - Userspace rpm: parted, version: 2.3-19ubuntu1 - The userspace tool has the following bit modes: 64-bit + Userspace tool common name: parted + Userspace rpm: parted, version: 2.3-19ubuntu1 + The userspace tool has the following bit modes: 64-bit == Comment: #2 - David Heller <[email protected]> - 2015-07-09 20:16:11 == Hi Ping, Are you sure that /dev/mapper/mpath2p1 device was not left over from install, and perhaps existed before you did the parted? Remember there were some changes to multipath in the installer, and the installer now uses mpathXpX, and the running os uses mpathX-partX.. I think that is right? If the two devices truly were created in the same parted operation, if you can reproduce it, can you run "udevadm monitor -p" during the operation, and provide the output? thx. == Comment: #3 - Ping Tian Han <[email protected]> - 2015-07-09 22:03:53 == (In reply to comment #2) > Hi Ping, - > + > > Are you sure that /dev/mapper/mpath2p1 device was not left over from > install, and perhaps existed before you did the parted? Remember there were Yes, I'm pretty sure the device wasn't left over from install: % ls /dev/mapper/mpath4* /dev/mapper/mpath4 % sudo parted /dev/mapper/mpath4* GNU Parted 2.3 Using /dev/mapper/mpath4 Welcome to GNU Parted! Type 'help' to view a list of commands. - (parted) p - Error: /dev/mapper/mpath4: unrecognised disk label - (parted) mklabel msdos - (parted) p + (parted) p + Error: /dev/mapper/mpath4: unrecognised disk label + (parted) mklabel msdos + (parted) p Model: Linux device-mapper (multipath) (dm) Disk /dev/mapper/mpath4: 284GB Sector size (logical/physical): 512B/4096B Partition Table: msdos Number Start End Size Type File system Flags - (parted) mkpart 1 + (parted) mkpart 1 parted: invalid token: 1 - Partition type? primary/extended? primary - File system type? [ext2]? - Start? 0% - End? 10% + Partition type? primary/extended? primary + File system type? [ext2]? + Start? 0% + End? 10% Device /dev/mapper/mpath4p1 not found device-mapper: table ioctl on failed: No such device or address Device /dev/mapper/mpath4p1 not found device-mapper: table ioctl on failed: No such device or address - (parted) p + (parted) p Model: Linux device-mapper (multipath) (dm) Disk /dev/mapper/mpath4: 284GB Sector size (logical/physical): 512B/4096B Partition Table: msdos Number Start End Size Type File system Flags - 1 1049kB 28.4GB 28.4GB primary + 1 1049kB 28.4GB 28.4GB primary - (parted) q - Information: You may need to update /etc/fstab. + (parted) q + Information: You may need to update /etc/fstab. - % ls /dev/mapper/mpath4* + % ls /dev/mapper/mpath4* /dev/mapper/mpath4 /dev/mapper/mpath4p1 /dev/mapper/mpath4-part1 - % + % > some changes to multipath in the installer, and the installer now uses - > mpathXpX, and the running os uses mpathX-partX.. I think that is right? - > + > mpathXpX, and the running os uses mpathX-partX.. I think that is right? + > > If the two devices truly were created in the same parted operation, if you > can reproduce it, can you run "udevadm monitor -p" during the operation, and > provide the output? thx. No problem, I'll upload the result. == Comment: #5 - Ping Tian Han <[email protected]> - 2015-07-09 22:09:59 == (In reply to comment #4) > Created attachment 100079 [details] > udevadm monitor -p outputs when bug reproduced This is the outputs when creating mpath4-part2. == Comment: #6 - Vaishnavi Bhat <[email protected]> - 2015-07-10 11:08:42 == Hi Ping Tian Han, Can you please try to install the latest parted package from http://ftp.gnu.org/gnu/parted/ and check if the issue is reproduced ? Thank you. == Comment: #7 - Ping Tian Han <[email protected]> - 2015-07-12 22:05:17 == (In reply to comment #6) > Hi Ping Tian Han, - > + > > Can you please try to install the latest parted package from - > http://ftp.gnu.org/gnu/parted/ and check if the issue is reproduced ? - > + > http://ftp.gnu.org/gnu/parted/ and check if the issue is reproduced ? + > > Thank you. The latest 3.2 version doesn't have this problem on dilllp1. ** Also affects: parted (Ubuntu Trusty) Importance: Undecided Status: New ** Also affects: multipath-tools (Ubuntu Trusty) Importance: Undecided Status: New ** Changed in: parted (Ubuntu) Status: In Progress => Fix Released ** Changed in: multipath-tools (Ubuntu) Status: In Progress => Fix Released ** Changed in: parted (Ubuntu) Status: Fix Released => Triaged ** Changed in: multipath-tools (Ubuntu Trusty) Status: New => In Progress ** Changed in: parted (Ubuntu Trusty) Status: New => Triaged ** Changed in: parted (Ubuntu Trusty) Importance: Undecided => High ** Changed in: multipath-tools (Ubuntu Trusty) Importance: Undecided => High ** Changed in: multipath-tools (Ubuntu Trusty) Assignee: (unassigned) => Mathieu Trudel-Lapierre (mathieu-tl) ** Changed in: parted (Ubuntu Trusty) Assignee: (unassigned) => Mathieu Trudel-Lapierre (mathieu-tl) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1473903 Title: parted will generate two devices when adding one partition on mpath device To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/multipath-tools/+bug/1473903/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
