Multipath in libvirt and virt-manager

Previously I mentioned that multipath can be tested with plain qemu. Today I want to mention that it’s also possible to test ,ultipath with virt-manager, or libvirt in general.

The basic trick is to point two (virtual) storage devices to the same backing image. And both devices must use the same serial. Caching should also be disabled.

Summarized:

• Multiple storage devices
• Same backing image for all of them
• Same serial for all of them
• No caching for all of them

Note: You need a raw (not qcow2) backing image, otherwise you can run into this bug

::: {#footer} [ January 6th, 2015 11:25am ]{#timestamp} [node]{.tag} [fedora]{.tag} [libvirt]{.tag} [multipath]{.tag} [virt-manager]{.tag} :::