This adds an improved apt configuration format that is fully backwards
compatible with previous behavior. This is mostly copied from curtin's
implementation.
It does:
* clean up and centralizes many of the top level 'apt_*' values that
previously existed into a single top level 'apt'key.
* support a 'source' in apt/sources/entry that has only a key
* documents new features and adds tests.
See the added doc/examples/cloud-config-apt.txt for more information.
It is more efficient and cross-distribution safe to use the hooks function
from dhclient to obtain the Azure endpoint server (DHCP option 245).
This is done by providing shell scritps that are called by the hooks
infrastructure of both dhclient and NetworkManager. The hooks then
invoke 'cloud-init dhclient-hook' that maintains json data
with the dhclient options in
/run/cloud-init/dhclient.hooks/<interface>.json .
The azure helper then pulls the value from
/run/cloud-init/dhclient.hooks/<interface>.json file(s). If that file does
not exist or the value is not present, it will then fall back to the
original method of scraping the dhcp client lease file.
Per [1], DigitalOcean provides the metadata in multiple formats. The JSON
document is the preferred endpoint.
Changes:
- Switch to the v1.json meta-data endpoint
- Identify droplet identity from SMBIOS
- Only poll for metadata when the instance is confirmed to be a droplet
- Removal of hard-coded mirrors
Additionally, centralize the gates on running 'dmidecode' on arm arches,
and update tests to address.
The older versions have various issues with unicode
and those versions seem to be pulled into epel so
we should denote that those versions are bad and
shouldn't be used by updating to a newer version that
does work.
