[Bug 1524737] Re: systemd presents hugetblfs at /dev/hugepages

[ChristianEhrhardt]

And for the remaining bug that Thiago reported Nish was so kind to file
it separately for better tracking as bug 1680956

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Title:
  systemd presents hugetblfs at /dev/hugepages

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[Bug 1524737] Re: systemd presents hugetblfs at /dev/hugepages

[ChristianEhrhardt]

Uh that was even Thiago, but Nish was the one who sent me a mail to read
through - thank you both!

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Title:
  systemd presents hugetblfs at /dev/hugepages

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[Bug 1524737] Re: systemd presents hugetblfs at /dev/hugepages

[Nish Aravamudan]

FWIW, this  bug is never going to be fixed in Wily, afaict, I'm deleting
the task.

** No longer affects: libvirt (Ubuntu Wily)

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Title:
  systemd presents hugetblfs at /dev/hugepages

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[Bug 1524737] Re: systemd presents hugetblfs at /dev/hugepages

[Nish Aravamudan]

FWIW, this  bug is never going to be fixed in Wily, afaict, I'm deleting
the task.

** No longer affects: libvirt (Ubuntu Wily)

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Title:
  systemd presents hugetblfs at /dev/hugepages

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[Bug 1524737] Re: systemd presents hugetblfs at /dev/hugepages

[Thiago Martins]

I'm seeing this problem while trying to launch an Instance on OpenStack
Ocata on Ubuntu 16.04, here is the error message on nova-compute.log:

---
2017-04-07 20:13:18.504 3996 ERROR nova.compute.manager [instance: 
fbbb7bde-763e-40d3-8987-fb3a6c568ad8] libvirtError: internal error: process 
exited while connecting to monitor: 2017-04-07T20:13:17.764939Z 
qemu-system-x86_64: -object 
memory-backend-file,id=ram-node0,prealloc=yes,mem-path=/dev/hugepages-1048576/libvirt/qemu,share=yes,size=4294967296,host-nodes=0,policy=bind:
 can't open backing store /dev/hugepages-1048576/libvirt/qemu for guest RAM: 
Permission denied
---

At syslog:

---
Apr  7 20:13:17 expert-jennet kernel: [ 1535.437956] audit: type=1400 
audit(1491595997.759:23): apparmor="DENIED" operation="mknod" 
profile="libvirt-fbbb7bde-763e-40d3-8987-fb3a6c568ad8" 
name="/dev/hugepages-1048576/libvirt/qemu/qemu_back_mem._objects_ram-node0.BFNx2W"
 pid=8341 comm="qemu-system-x86" requested_mask="c" denied_mask="c" fsuid=64055 
ouid=64055
---

Any idea about how to fix it?

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  systemd presents hugetblfs at /dev/hugepages

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[Bug 1524737] Re: systemd presents hugetblfs at /dev/hugepages

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: libvirt (Ubuntu Wily)
   Status: New => Confirmed

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  systemd presents hugetblfs at /dev/hugepages

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[Bug 1524737] Re: systemd presents hugetblfs at /dev/hugepages

[Serge Hallyn]

** No longer affects: libvirt (Ubuntu Vivid)

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  systemd presents hugetblfs at /dev/hugepages

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[Bug 1524737] Re: systemd presents hugetblfs at /dev/hugepages

[Serge Hallyn]

** No longer affects: libvirt (Ubuntu Vivid)

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Title:
  systemd presents hugetblfs at /dev/hugepages

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[Bug 1524737] Re: systemd presents hugetblfs at /dev/hugepages

[Serge Hallyn]

** Description changed:

+ ==
+ SRU Justification
+ Impact: libvirt unable to grant access to hugepages
+ Fix: add an apparmor rule to allow libvirt to access hugepages at the path 
which systemd uses
+ Test case: boot a vm with hugepages enabled.
+ Regression potential:  We already have an allow rule for the old hugepages 
mount path, we are only allowing access to the path which systemd uses.  So 
there should be no regressions.
+ ==
+ 
  If a system is configured to allocate hugepages on boot, systemd will
  automatically present a hugetblfs at /dev/hugepages
  
  This is not compatible with the current apparmor profile which expects
  presentation at /var/run/hugepages.
  
  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: libvirt-bin 1.2.21-2ubuntu1
  ProcVersionSignature: Ubuntu 4.3.0-2.11-generic 4.3.0
  Uname: Linux 4.3.0-2-generic x86_64
  NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
  ApportVersion: 2.19.2-0ubuntu9
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Thu Dec 10 11:16:28 2015
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2014-11-25 (379 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Alpha amd64 (20141124)
  SourcePackage: libvirt
  UpgradeStatus: Upgraded to xenial on 2015-11-02 (38 days ago)
  modified.conffile..etc.libvirt.qemu.conf: [inaccessible: [Errno 13] 
Permission denied: '/etc/libvirt/qemu.conf']
  modified.conffile..etc.libvirt.qemu.networks.default.xml: [inaccessible: 
[Errno 13] Permission denied: '/etc/libvirt/qemu/networks/default.xml']

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  systemd presents hugetblfs at /dev/hugepages

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[Bug 1524737] Re: systemd presents hugetblfs at /dev/hugepages

[Serge Hallyn]

** Also affects: libvirt (Ubuntu Wily)
   Importance: Undecided
   Status: New

** Also affects: libvirt (Ubuntu Vivid)
   Importance: Undecided
   Status: New

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  systemd presents hugetblfs at /dev/hugepages

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[Bug 1524737] Re: systemd presents hugetblfs at /dev/hugepages

[Serge Hallyn]

** Also affects: libvirt (Ubuntu Wily)
   Importance: Undecided
   Status: New

** Also affects: libvirt (Ubuntu Vivid)
   Importance: Undecided
   Status: New

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  systemd presents hugetblfs at /dev/hugepages

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[Bug 1524737] Re: systemd presents hugetblfs at /dev/hugepages

[Launchpad Bug Tracker]

This bug was fixed in the package libvirt - 1.2.21-2ubuntu3

---
libvirt (1.2.21-2ubuntu3) xenial; urgency=medium

  * Fix build-test autopkgtest: it now expects to run with the current
directory set to the root of the unpacked source package, writes to
$ADTTMP rather than to the source package, and declares dependencies on
build-essential and pkg-config.

 -- Colin Watson   Mon, 28 Dec 2015 05:25:54 +

** Changed in: libvirt (Ubuntu)
   Status: New => Fix Released

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Title:
  systemd presents hugetblfs at /dev/hugepages

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[Bug 1524737] Re: systemd presents hugetblfs at /dev/hugepages

[Launchpad Bug Tracker]

This bug was fixed in the package libvirt - 1.2.21-2ubuntu3

---
libvirt (1.2.21-2ubuntu3) xenial; urgency=medium

  * Fix build-test autopkgtest: it now expects to run with the current
directory set to the root of the unpacked source package, writes to
$ADTTMP rather than to the source package, and declares dependencies on
build-essential and pkg-config.

 -- Colin Watson   Mon, 28 Dec 2015 05:25:54 +

** Changed in: libvirt (Ubuntu)
   Status: New => Fix Released

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Title:
  systemd presents hugetblfs at /dev/hugepages

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[Bug 1524737] Re: systemd presents hugetblfs at /dev/hugepages

[Chris J Arges]

Did this happen after upgrading to 1.2.21-2ubuntu1, or was this present
in earlier versions?

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  systemd presents hugetblfs at /dev/hugepages

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[Bug 1524737] Re: systemd presents hugetblfs at /dev/hugepages

[James Page]

Note that '/dev/hugepages/libvirt/qemu' appeared to be auto-created.

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  systemd presents hugetblfs at /dev/hugepages

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