[Bug 1665698] Re: /etc/qemu-ifup not allowed by apparmor

[James Page]

Having read through the history on this bug I'm a little confused;
Newton UCA does not contain any version of libvirt - Newton deployments
on Xenial will use the libvirt version shipped in Xenial itself, which I
think is the same version that will be used in all gates for OpenStack
so I'm not clear on exactly what needs 'fixing' for the Newton UCA.

This is also reflected in the latest set of tests for Newton SRU's which
are currently in-flight - I'm not seeing any unexpected test failures
from tempest for the proposed packages which include the changes
referenced on the stable/newton branch.

Doe the change in behaviour in OpenStack only impact on certain vif
types?

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Title:
  /etc/qemu-ifup not allowed by apparmor

Status in Ubuntu Cloud Archive:
  Incomplete
Status in libvirt package in Ubuntu:
  Fix Released
Status in libvirt source package in Yakkety:
  Triaged

Bug description:
  I have VMs failing to start with 2017-02-17 15:38:44.458 264015 ERROR
  nova.compute.manager [instance: 0c97ab16-2d30-43fa-b0e4-a064a842b5ed]
  libvirtError: internal error: process exited while connecting to
  monitor: 2017-02-17T15:38:43.907222Z qemu-system-x86_64: -netdev
  tap,ifname=tapf34ef99e-18,id=hostnet0,vhost=on,vhostfd=28: network
  script /etc/qemu-ifup failed with status 256

  Log excerpt:
  http://cdn.pasteraw.com/b3tw4cjefomfi3e9k09hvodrfun85z

  Seems to be that /etc/qemu-ifup is being blocked by apparmor:
  type=AVC msg=audit(1487347189.015:28536): apparmor="DENIED" operation="exec" profile="libvirt-4a03fea7-e966-48e4-80ac-aa138db67243" name="/etc/qemu-ifup" pid=285438 comm="qemu-system-x86" requested_mask="x" denied_mask="x" fsuid=0 ouid=0
  type=PATH msg=audit(1487347189.015:28536): item=0 name="/etc/qemu-ifup" inode=66403 dev=08:01 mode=0100755 ouid=0 ogid=0 rdev=00:00 nametype=NORMAL

  root at ubuntu-trusty-5773:/etc/apparmor.d/abstractions# cat /etc/apparmor.d/libvirt/libvirt-4a03fea7-e966-48e4-80ac-aa138db67243
  #
  # This profile is for the domain whose UUID matches this file.
  #

  #include <tunables/global>

  profile libvirt-4a03fea7-e966-48e4-80ac-aa138db67243 {
    #include <abstractions/libvirt-qemu>
    #include <libvirt/libvirt-4a03fea7-e966-48e4-80ac-aa138db67243.files>

  }
  root at ubuntu-trusty-5773:/etc/apparmor.d/abstractions# cat /etc/apparmor.d/libvirt/libvirt-4a03fea7-e966-48e4-80ac-aa138db67243.files
  # DO NOT EDIT THIS FILE DIRECTLY. IT IS MANAGED BY LIBVIRT.
    "/var/log/libvirt/**/instance-00000008.log" w,
    "/var/lib/libvirt/qemu/domain-instance-00000008/monitor.sock" rw,
    "/var/run/libvirt/**/instance-00000008.pid" rwk,
    "/run/libvirt/**/instance-00000008.pid" rwk,
    "/var/run/libvirt/**/*.tunnelmigrate.dest.instance-00000008" rw,
    "/run/libvirt/**/*.tunnelmigrate.dest.instance-00000008" rw,
    "/var/lib/nova/instances/4a03fea7-e966-48e4-80ac-aa138db67243/console.log" rw,
    "/var/lib/nova/instances/4a03fea7-e966-48e4-80ac-aa138db67243/console.log" rw,
    # for qemu guest agent channel
    owner "/var/lib/libvirt/qemu/channel/target/domain-instance-00000008/**" rw,
    /dev/vhost-net rw,

  root at ubuntu-trusty-5773:/etc/apparmor.d/abstractions# dpkg -S libvirt-qemu
  libvirt-bin: /etc/apparmor.d/abstractions/libvirt-qemu

  root at ubuntu-trusty-5773:/etc/apparmor.d/abstractions# dpkg -l libvirt-bin
  Desired=Unknown/Install/Remove/Purge/Hold
  | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
  |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
  ||/ Name                                      Version                   Architecture              Description
  +++-=========================================-=========================-=========================-=======================================================================================
  ii  libvirt-bin                               1.3.1-1ubuntu10.6~cloud0  amd64                     programs for the libvirt library

  
  Seeing identical behavior on Xenial
  ubuntu at ubuntu-xenial-5165:~$ dpkg -l libvirt-bin
  Desired=Unknown/Install/Remove/Purge/Hold
  | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
  |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
  ||/ Name                                      Version                   Architecture              Description
  +++-=========================================-=========================-=========================-=======================================================================================
  ii  libvirt-bin                               1.3.1-1ubuntu10.8         amd64                     programs for the libvirt library

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