As far as I know, this bug can be closed, it was a mistake on our side: The script /etc/xen/scripts/block-iscsi had been modified from the package version and it was outputting some debug values, which seem to be what caused migrations to now fail.
Reasonably Related Threads
- Bug#820154: 4.4.1-9+deb8u4: impossible to 'lv migrate' with latest stable version
- Bug#691808: xcp-storage-managers: Another wrong binary path + wrong parameter in storage managers backend
- Bug#626356: xen-utils-common: Xen domains should shut down before iSCSI
- (no subject)
- Patches to support iSCSI in xcp-storage-managers
Wisdom of the Ancients
