This is a cloud-init OS definition for Ganeti. It injects the meta-data and user-data directly into file system of the target host, to be picked up by the NoCloud data source.
Download the needed cloud-init images to /var/cache/ganeti-cloudimg and
distribute them to all nodes. The expected file name of an image is
specified in the corresponding configuration file found under
/etc/ganeti/nocloud/variants/. To add a missing OS variant, create the
configuration file and add the name to /etc/ganeti/nocloud/variants.list.
Next, put your cloud config data under
/etc/ganeti/nocloud/user-data/. The OS creation script will look for
${OS_VARIANT}.yml then default.yml by default, but you can provide an
alternative file name with the cloud_userdata_file OS parameter. This
parameter also accepts an absolute path, e.g. to deliver files from /tmp.
Once the needed image is in place, the VM can be created by specifying
nocloud+variant as the OS, where variant is one of
/etc/ganeti/nocloud/variants.list:
gnt-instance add -s 7G -o nocloud+ubuntu-18.04 vm1.example.org
For static IP configuration, specify the network and ip parameters for
the interface with e.g. --net 0:network=local,ip=172.16.0.20. Also, if
you pass -O static_host_interface=0 then all IPs from the DNS A and AAAA
records for the host will be added to the first interface, in which case the
ip network parameter may be omitted. This allows creating IPv6-only VMs
or VMs with multiple IP numbers.
DNS configuration can be passed though the OS parameters dns_nameservers
and dns_search which are comma-separated lists of IPs and domains,
respectively.