In the DIB build the DHCP code (provided by the dhcp-all-interfaces element)
races with the service starting IPA. It does not matter for deployment itself,
as we're waiting for the route to the Ironic API to appear. However, for
inspection it may result in reporting back all NIC's without IP addresses.
Inspection fails in this case.
This change makes inspection wait for *all* NIC's to get their IP addresses up
to a small timeout. The timeout is 60 seconds by default and can be changed
via the new ipa-inspection-dhcp-wait-timeout kernel option (0 to not wait).
After the wait inspection proceedes in any case, so the worst downside
is making inspection 60 seconds longer.
To avoid waiting for NIC's that are not even connected, this change extends the
NetworkInterface class with 'has_carrier' field.
Closes-Bug: #1564954
Change-Id: I5bf14de4c1c622f4bf6e3eadbe20c44759da5d66
3deb25a3ce