[Expired for OpenStack Compute (nova) because there has been no activity
for 60 days.]
** Changed in: nova
Status: Incomplete => Expired
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https://bugs.launchpad.net/bugs/1917721
Title:
nova volume attach scsi controller unit allocation bug
Status in OpenStack Compute (nova):
Expired
Bug description:
The scsi controller unit number only increases without decreasing, and
there is no recycling.
virt/libvirt/driver.py
```
def _get_scsi_controller_next_unit(self, guest):
"""Returns the max disk unit used by scsi controller"""
xml = guest.get_xml_desc()
tree = etree.fromstring(xml)
addrs = "./devices/disk[target/@bus='scsi']/address[@type='drive']"
ret = []
for obj in tree.xpath(addrs):
ret.append(int(obj.get('unit', 0)))
return max(ret) + 1 if ret else 0
```
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