+========
Appendix
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+========
A.1 Impact Analysis
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+===================
Upgrading the different software modules may cause different impact on
the availability of the infrastructure resources and even on the service
#. Hypervisor, such as KVM, QEMU, XEN, libvirt
#. Openstack agent in computing nodes (like Nova agent, Ceilometer
agent...)
-
+
.. <MT> As SW module, we should list the host OS and maybe its
drivers as well. From upgrade perspective do we limit host OS
upgrades to patches only?