[Bug 1193705] Re: [udev] /dev/disk/by-path missing
This has been resolved in the latest upstream releases. ** Changed in: ceph (Ubuntu) Status: New => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1193705 Title: [udev] /dev/disk/by-path missing To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ceph/+bug/1193705/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1193705] Re: [udev] /dev/disk/by-path missing
** Changed in: systemd (Ubuntu) Status: Incomplete => Won't Fix -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1193705 Title: [udev] /dev/disk/by-path missing To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ceph/+bug/1193705/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1193705] Re: [udev] /dev/disk/by-path missing
Hi Martin Thanks for the detailed response on different ways to tackle this issue; I'll review and see what we can do with upstream to resolve this. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1193705 Title: [udev] /dev/disk/by-path missing To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ceph/+bug/1193705/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1193705] Re: [udev] /dev/disk/by-path missing
While we can technically put /dev/disks/by-path back for ATA devices in
Ubuntu, that still won't help upstream ceph on other distros, and I
believe this approach is buggy anyway. is_partition() currently looks a
bit underdefined/buggy to me, as it's not uncommon to have file systems
on unpartitioned block devices (i. e. mounting /dev/sdb directly); this
will also completely miss devmapper or other "virtual" devices. To mimic
the current behaviou, one could do something like
return not os.path.exists('/sys/block/%s' % os.path.basename(dev))
as devices will be there (like /sys/block/sdb), and partitions under
that (like /sys/block/sdb/sdb2). But again, that's not really what you
want there: Judging by how is_partition() is being used in
verify_not_in_use(), it should probably be called is_filesystem() and
query udev (CLI example: udevadm info --name=/dev/sda2 | grep ID_FS) or
blkid.
There are a couple of options how to rewrite these functions, including
reading /sys/block/, /proc/partitions, asking blkid, querying udevadm,
or querying udisks.
If you want a list of block devices with mountable file systems which
are present, and don't want to use any extra libraries, then perhaps the
simplest thing is
udevadm trigger --dry-run --verbose --property-
match=ID_FS_USAGE=filesystem
(this doesn't need any root privileges). If you want all block devices,
then
udevadm trigger --dry-run --verbose --subsystem-match=block
will give a list, including device-mapper (and also loopback, etc.).
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Title:
[udev] /dev/disk/by-path missing
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[Bug 1193705] Re: [udev] /dev/disk/by-path missing
Raising a task for ceph as well as this is the key impact I'm currently aware of. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1193705 Title: [udev] /dev/disk/by-path missing To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ceph/+bug/1193705/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1193705] Re: [udev] /dev/disk/by-path missing
Easiest to refer to the code that uses this: List all devices and partitions: http://bazaar.launchpad.net/~ubuntu-branches/ubuntu/saucy/ceph/saucy/view/head:/src/ceph-disk#L179 Check whether a given device is a partition or a full disk: http://bazaar.launchpad.net/~ubuntu-branches/ubuntu/saucy/ceph/saucy/view/head:/src/ceph-disk#L222 ** Also affects: ceph (Ubuntu) Importance: Undecided Status: New ** Changed in: ceph (Ubuntu) Importance: Undecided => High -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1193705 Title: [udev] /dev/disk/by-path missing To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ceph/+bug/1193705/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1193705] Re: [udev] /dev/disk/by-path missing
> The tools use the /dev/disk/by-path tree to detect whether specific devices are already in use or not; The by-path for ATA devices was removed because it was possible for the same device to have multiple different by-path names; what does "in use" mean in that context? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1193705 Title: [udev] /dev/disk/by-path missing To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1193705/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1193705] Re: [udev] /dev/disk/by-path missing
Martin I picked it up because it causes problems with the tooling that ceph uses to prepare disks for use in a ceph cluster. The tools use the /dev/disk/by-path tree to detect whether specific devices are already in use or not; so it would be nice if it could be restored! -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1193705 Title: [udev] /dev/disk/by-path missing To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1193705/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1193705] Re: [udev] /dev/disk/by-path missing
I bisected this down to http://git.kernel.org/cgit/linux/hotplug/udev.git/commit/?id=481dcf7c8f; reverting it makes the by-path/ reappear, but disabling it for ATA devices (which only have a SCSI driver, but are not physically SCSI) was quite deliberate. Is this causing actual problems, or did you just happen to notice it? ** Changed in: systemd (Ubuntu) Importance: Medium => Low ** Changed in: systemd (Ubuntu) Status: Triaged => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1193705 Title: [udev] /dev/disk/by-path missing To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1193705/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1193705] Re: [udev] /dev/disk/by-path missing
** Summary changed: - /dev/disk/by-path missing in saucy cloud image + [udev] /dev/disk/by-path missing ** Changed in: systemd (Ubuntu) Status: New => Triaged ** Changed in: systemd (Ubuntu) Importance: Undecided => Medium -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1193705 Title: [udev] /dev/disk/by-path missing To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1193705/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
