Regression introduced by 9fcf338bf3e6c941068a2ce9e6ce64fbb3e4b65d.
Networkd was erroneously being restarted once per network unit. It
should only restart once for the entire config.
This allows a list of drop-ins for a unit to be declared inline within a
cloud-config. For example:
#cloud-config
coreos:
units:
- name: docker.service
drop-ins:
- name: 50-insecure-registry.conf
content: |
[Service]
Environment=DOCKER_OPTS='--insecure-registry="10.0.1.0/24"'
- Explicitly specify all of the valid options for etcd
- Remove the default name generation (ETCD_NAME is set by its unit file now)
- Seperate the etcd config from Units()
- Remove support for DISCOVERY_URL
- Add YAML tags for the fields
As it turns out, certain metadata is only present in the ec2 flavor
of metadata (e.g. public_ipv4) and other data is only present in
the openstack flavor (e.g. network_config). For now, just read the
openstack metadata.
In some circumstances (e.g. nova-agent-watcher) cloudconfig files will
be created where the EtcdEnvironment is an empty map, and hence != nil.
If this is the case we should not do anything at all (because the user
hasn't explicitly asked us to configure etcd). This change standardises
behaviour with the check that we already do for FleetEnvironment.
To maintain the behavior of the coreos-setup-environment that has
started to move into cloudinit we need to write out /etc/environment
with the public and private addresses, if known. The file is updated so
that other contents are not replaced. This behavior is disabled entirely
if /etc/environment was written by a write_files entry.
This attempts to retrieve cloudconfigs from two sources: the meta-data
service, and the user-data service. If only one cloudconfig is found,
that is applied to the system. If both services return a cloudconfig,
the two are merged into a single cloudconfig which is then applied to
the system.
Only a subset of parameters are merged (because the meta-data service
currently only partially populates a cloudconfig). In the event of any
conflicts, parameters in the user-data cloudconfig take precedence over
those in the meta-data cloudconfig.
This uses the new MetadataService implementation to retrieve values for
$private_ipv4 and $public_ipv4 substitutions, instead of using
environment variables.
