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[Lucas Alvares Gomes <lucasagomes@xxxxxxxxx>]

Public bug reported:

The devstack/lib/ovs module doesn't currently work on a Fedora 28 base
host OS. Here's the failures I've bumped into when I've attempted to
stack my DevStack cloud on a Fedora 28 host OS.

Problem 1:

NOTE: if kernel-devel-4.17.19_200.fc28.x86_64 or kernel-headers-4.17.19_200.fc28.x86_64 installation
failed, please, provide a repository with the package, or yum update / reboot
your machine to get the latest kernel.
Last metadata expiration check: 0:25:41 ago on Fri 31 Aug 2018 09:13:54 AM UTC.
No match for argument: kernel-devel-4.17.19_200.fc28.x86_64
Error: Unable to find a match
YUM_FAILED 1
Last metadata expiration check: 0:25:43 ago on Fri 31 Aug 2018 09:13:54 AM UTC.
No match for argument: kernel-devel-4.17.19_200.fc28.x86_64
Error: Unable to find a match
YUM_FAILED 1
Error on exit
World dumping... see /opt/stack/logs/worlddump-2018-08-31-093938.txt for details

Apparently the kernel-devel and kernel-headers packages have different patch versions (all packages have been updated prior to starting devstack). See:
                                                                                                                                                                                                   
 kernel-devel: 4.17.19-200.fc28     
 kernel-headers: 4.17.19-1.fc28

We need to account for that.

Problem 2:

ln -s /opt/stack/ovs/datapath/linux/../linux/compat/utils.c 
ln -s /opt/stack/ovs/datapath/linux/../vport-geneve.c 
ln -s /opt/stack/ovs/datapath/linux/../vport-gre.c 
ln -s /opt/stack/ovs/datapath/linux/../vport-lisp.c 
ln -s /opt/stack/ovs/datapath/linux/../vport-stt.c 
ln -s /opt/stack/ovs/datapath/linux/../vport-vxlan.c 
make -C /lib/modules/4.17.19-200.fc28.x86_64/build M=/opt/stack/ovs/datapath/linux modules
make[4]: Entering directory '/usr/src/kernels/4.17.19-200.fc28.x86_64'
Makefile:974: *** "Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel".  Stop.
make[4]: Leaving directory '/usr/src/kernels/4.17.19-200.fc28.x86_64'
make[3]: *** [Makefile.main:71: default] Error 2
make[3]: Leaving directory '/opt/stack/ovs/datapath/linux'
make[2]: *** [Makefile:572: all-recursive] Error 1
make[2]: Leaving directory '/opt/stack/ovs/datapath'
make[1]: *** [Makefile:5795: all-recursive] Error 1
make[1]: Leaving directory '/opt/stack/ovs'
make: *** [Makefile:3411: all] Error 2
Error on exit
World dumping... see /opt/stack/logs/worlddump-2018-08-31-104046.txt for details

When compiling OVS. To fix this we just need to install the elfutils-
libelf-devel package.

** Affects: neutron
     Importance: Undecided
     Assignee: Lucas Alvares Gomes (lucasagomes)
         Status: In Progress

** Changed in: neutron
     Assignee: (unassigned) => Lucas Alvares Gomes (lucasagomes)

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https://bugs.launchpad.net/bugs/1790143

Title:
  devstack/lib/ovs fails on fedora

Status in neutron:
  In Progress

Bug description:
  The devstack/lib/ovs module doesn't currently work on a Fedora 28 base
  host OS. Here's the failures I've bumped into when I've attempted to
  stack my DevStack cloud on a Fedora 28 host OS.

  Problem 1:

  NOTE: if kernel-devel-4.17.19_200.fc28.x86_64 or kernel-headers-4.17.19_200.fc28.x86_64 installation
  failed, please, provide a repository with the package, or yum update / reboot
  your machine to get the latest kernel.
  Last metadata expiration check: 0:25:41 ago on Fri 31 Aug 2018 09:13:54 AM UTC.
  No match for argument: kernel-devel-4.17.19_200.fc28.x86_64
  Error: Unable to find a match
  YUM_FAILED 1
  Last metadata expiration check: 0:25:43 ago on Fri 31 Aug 2018 09:13:54 AM UTC.
  No match for argument: kernel-devel-4.17.19_200.fc28.x86_64
  Error: Unable to find a match
  YUM_FAILED 1
  Error on exit
  World dumping... see /opt/stack/logs/worlddump-2018-08-31-093938.txt for details

  Apparently the kernel-devel and kernel-headers packages have different patch versions (all packages have been updated prior to starting devstack). See:
                                                                                                                                                                                                     
   kernel-devel: 4.17.19-200.fc28     
   kernel-headers: 4.17.19-1.fc28

  We need to account for that.

  Problem 2:

  ln -s /opt/stack/ovs/datapath/linux/../linux/compat/utils.c 
  ln -s /opt/stack/ovs/datapath/linux/../vport-geneve.c 
  ln -s /opt/stack/ovs/datapath/linux/../vport-gre.c 
  ln -s /opt/stack/ovs/datapath/linux/../vport-lisp.c 
  ln -s /opt/stack/ovs/datapath/linux/../vport-stt.c 
  ln -s /opt/stack/ovs/datapath/linux/../vport-vxlan.c 
  make -C /lib/modules/4.17.19-200.fc28.x86_64/build M=/opt/stack/ovs/datapath/linux modules
  make[4]: Entering directory '/usr/src/kernels/4.17.19-200.fc28.x86_64'
  Makefile:974: *** "Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel".  Stop.
  make[4]: Leaving directory '/usr/src/kernels/4.17.19-200.fc28.x86_64'
  make[3]: *** [Makefile.main:71: default] Error 2
  make[3]: Leaving directory '/opt/stack/ovs/datapath/linux'
  make[2]: *** [Makefile:572: all-recursive] Error 1
  make[2]: Leaving directory '/opt/stack/ovs/datapath'
  make[1]: *** [Makefile:5795: all-recursive] Error 1
  make[1]: Leaving directory '/opt/stack/ovs'
  make: *** [Makefile:3411: all] Error 2
  Error on exit
  World dumping... see /opt/stack/logs/worlddump-2018-08-31-104046.txt for details

  When compiling OVS. To fix this we just need to install the elfutils-
  libelf-devel package.

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