cd66232c2b
It also adds 2 sample of devstack's local.conf file for deploying Neutron with OVN mechanism driver. Needed to create PNG files out of the existing SVG ones in order to pass the pdf doc build. Co-Authored-By: Aaron Rosen <aaronorosen@gmail.com> Co-Authored-By: Akihiro Motoki <amotoki@gmail.com> Co-Authored-By: Amitabha Biswas <abiswas@us.ibm.com> Co-Authored-By: Andreas Jaeger <aj@suse.com> Co-Authored-By: Anh Tran <anhtt@vn.fujitsu.com> Co-Authored-By: Assaf Muller <amuller@redhat.com> Co-Authored-By: Babu Shanmugam <bschanmu@redhat.com> Co-Authored-By: Brian Haley <bhaley@redhat.com> Co-Authored-By: Chandra S Vejendla <csvejend@us.ibm.com> Co-Authored-By: Daniel Alvarez <dalvarez@redhat.com> Co-Authored-By: Dong Jun <dongj@dtdream.com> Co-Authored-By: Emilien Macchi <emilien@redhat.com> Co-Authored-By: Flavio Fernandes <flavio@flaviof.com> Co-Authored-By: Gal Sagie <gal.sagie@huawei.com> Co-Authored-By: Gary Kotton <gkotton@vmware.com> Co-Authored-By: Guoshuai Li <ligs@dtdream.com> Co-Authored-By: Han Zhou <zhouhan@gmail.com> Co-Authored-By: Hong Hui Xiao <xiaohhui@cn.ibm.com> Co-Authored-By: Jakub Libosvar <libosvar@redhat.com> Co-Authored-By: Jeff Feng <jianhua@us.ibm.com> Co-Authored-By: Jenkins <jenkins@review.openstack.org> Co-Authored-By: Jonathan Herlin <jonte@jherlin.se> Co-Authored-By: Kyle Mestery <mestery@mestery.com> Co-Authored-By: Le Hou <houl7@chinaunicom.cn> Co-Authored-By: Lucas Alvares Gomes <lucasagomes@gmail.com> Co-Authored-By: Matthew Kassawara <mkassawara@gmail.com> Co-Authored-By: Miguel Angel Ajo <majopela@redhat.com> Co-Authored-By: Murali Rangachari <muralirdev@gmail.com> Co-Authored-By: Numan Siddique <nusiddiq@redhat.com> Co-Authored-By: Reedip <rbanerje@redhat.com> Co-Authored-By: Richard Theis <rtheis@us.ibm.com> Co-Authored-By: Russell Bryant <rbryant@redhat.com> Co-Authored-By: Ryan Moats <rmoats@us.ibm.com> Co-Authored-By: Simon Pasquier <spasquier@mirantis.com> Co-Authored-By: Terry Wilson <twilson@redhat.com> Co-Authored-By: Tong Li <litong01@us.ibm.com> Co-Authored-By: Yunxiang Tao <taoyunxiang@cmss.chinamobile.com> Co-Authored-By: Yushiro FURUKAWA <y.furukawa_2@jp.fujitsu.com> Co-Authored-By: chen-li <shchenli@cn.ibm.com> Co-Authored-By: gong yong sheng <gong.yongsheng@99cloud.net> Co-Authored-By: lidong <lidongbj@inspur.com> Co-Authored-By: lzklibj <lzklibj@cn.ibm.com> Co-Authored-By: melissaml <ma.lei@99cloud.net> Co-Authored-By: pengyuesheng <pengyuesheng@gohighsec.com> Co-Authored-By: reedip <rbanerje@redhat.com> Co-Authored-By: venkata anil <anilvenkata@redhat.com> Co-Authored-By: xurong00037997 <xu.rong@zte.com.cn> Co-Authored-By: zhangdebo <zhangdebo@inspur.com> Co-Authored-By: zhangyanxian <zhang.yanxian@zte.com.cn> Co-Authored-By: zhangyanxian <zhangyanxianmail@163.com> Change-Id: Ia121ec5146c1d35b3282e44fd1eb98932939ea8c Partially-Implements: blueprint neutron-ovn-merge
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.. _ovn_troubleshooting:
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===============
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Troubleshooting
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===============
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The following section describe common problems that you might
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encounter after/during the installation of the OVN ML2 driver with
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Devstack and possible solutions to these problems.
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Launching VM's failure
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-----------------------
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Disable AppArmor
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~~~~~~~~~~~~~~~~
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Using Ubuntu you might encounter libvirt permission errors when trying
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to create OVS ports after launching a VM (from the nova compute log).
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Disabling AppArmor might help with this problem, check out
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https://help.ubuntu.com/community/AppArmor for instructions on how to
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disable it.
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Multi-Node setup not working
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-----------------------------
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Geneve kernel module not supported
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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By default OVN creates tunnels between compute nodes using the Geneve protocol.
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Older kernels (< 3.18) don't support the Geneve module and hence tunneling
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can't work. You can check it with this command 'lsmod | grep openvswitch'
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(geneve should show up in the result list)
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For more information about which upstream Kernel version is required for
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support of each tunnel type, see the answer to " Why do tunnels not work when
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using a kernel module other than the one packaged with Open vSwitch?" in the
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`OVS FAQ <http://docs.openvswitch.org/en/latest/faq/>`__.
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MTU configuration
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~~~~~~~~~~~~~~~~~
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This problem is not unique to OVN but is amplified due to the possible larger
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size of geneve header compared to other common tunneling protocols (VXLAN).
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If you are using VM's as compute nodes make sure that you either lower the MTU
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size on the virtual interface or enable fragmentation on it.
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