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marios 36e23f3ef1 Tidy up docs - fixup missing links to TOC where possible

Due to layout of current docs, some sections don't display the TOC
on the left hand navbar, for example installation/installation.html

One of the reasons is that the subsections there (installing or
updating) are labelled as sections (=== instead of ----).

This updates the installation and troubleshooting sections

Change-Id: Iad8f9fd760716c3f7139684861b12e2cd286501a

2015-10-23 12:00:23 +03:00

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Troubleshooting instack-virt-setup Failures -----------------------------------

Known Issues:

Due to a bug in libvirt, it is possible for instack-virt-setup to fail with an error such as the following:

libvirt: QEMU Driver error : unsupported configuration: This QEMU doesn't support virtio scsi controller
Traceback (most recent call last):
File "/usr/libexec/openstack-tripleo/configure-vm", line 133, in <module>
    main()
File "/usr/libexec/openstack-tripleo/configure-vm", line 129, in main
    a = conn.defineXML(libvirt_template)
File "/usr/lib64/python2.7/site-packages/libvirt.py", line 3445, in defineXML
    if ret is None:raise libvirtError('virDomainDefineXML() failed', conn=self)
libvirt.libvirtError: unsupported configuration: This QEMU doesn't support virtio scsi controller

The workaround is to do delete the libvirt capabilities cache and restart the service:

rm -Rf  /var/cache/libvirt/qemu/capabilities/
systemctl restart libvirtd

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Known Issues:

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