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https://bugzilla.redhat.com/show_bug.cgi?id=1171984 https://bugzilla.redhat.com/show_bug.cgi?id=1188463 Remove the check for the source host name for iSCSI source XML processing declaring duplicate sources when the source device path and if present the initiator of a proposed storage pool matches an existing storage pool. The backend iSCSI storage driver uses 'iscsiadm --mode session' to query available iscsid target sessions. The output displayed is the IP address and the IQN (target path) of known targets. The displayed IP address is a resolved address based on the session --login. Additionally, iscsid keeps track of the various ways to define the host name (IPv4 Address, IPv6 Address, /etc/hosts, etc.) for that IQN (see output of an 'iscsiadm --mode node'). If an incoming IQN matches and the host name provided by libvirt is resolved to the existing IQN, then iscsid will "reuse" the session. Although libvirt could do the same name resolution, if there is a difference, iscsid could still declare two seemingly different sources to be the same and not create a new session which means libvirt now has two storage pools looking at the same source. Thus to avoid any strange host name resolution issues, just rely on iscsid for that and do not allow multiple pools on the same host to use the same device path (IQN).
LibVirt : simple API for virtualization
Libvirt is a C toolkit to interact with the virtualization capabilities
of recent versions of Linux (and other OSes). It is free software
available under the GNU Lesser General Public License. Virtualization of
the Linux Operating System means the ability to run multiple instances of
Operating Systems concurrently on a single hardware system where the basic
resources are driven by a Linux instance. The library aim at providing
long term stable C API initially for the Xen paravirtualization but
should be able to integrate other virtualization mechanisms if needed.
Daniel Veillard <veillard@redhat.com>