dhclient-hook: cleanups, tests and fix a bug on 'down' event.
I noticed a bug in dhclient_hook on the 'down' event, using 'is'
operator rather than '==' (if self.net_action is 'down').
This refactors/simplifies the code a bit for easier testing and adds
tests. The reason for the rename of 'action' to 'event' is to just
be internally consistent. The word and Namespace 'action' is used
by cloud-init main, so it was not really usable here.
Move routes under the nic's subnet rather than use top-level
("global") route config ensuring all net renderers will provide the
configured route.
Also updated cloudinit/cmd/devel/net_convert.py:
- Add input type 'vmware-imc' for OVF customization config files
- Fix bug when output-type was netplan which invoked netplan
generate/apply and attempted to write to
/etc/netplan/50-cloud-init.yaml instead of joining with the
output directory.
azure: detect vnet migration via netlink media change event
Replace Azure pre-provision polling on IMDS with a blocking call
which watches for netlink link state change messages. The media
change event happens when a pre-provisioned VM has been activated
and is connected to the users virtual network and cloud-init can
then resume operation to complete image instantiation.
OVF: identify label iso9660 filesystems with label 'OVF ENV'.
When deploying an OVA, at least some versions of vmware
attach a cdrom with an ISO9660 filesystem label of 'OVF ENV'.
This was seen on Vmware vCenter Server, 6.0.0, 2776510.
In order to accomplish this we had to change the content of
the DI_ISO9660_DEVS variable to be comma delimited rather
than space delimited.
