reduced footprint: wrong documentation to enable advanced feature

[Swann Croiset]

I cannot enable "advanced" feature by editing /etc/fuel/version.yaml file.

I use this documentation:
https://docs.mirantis.com/openstack/fuel/fuel-8.0/operations.html#using-the-reduced-footprint-feature

https://review.fuel-infra.org/gitweb?p=mos/mos-docs.git;a=blob;f=pages/operations/reduced-footprint-ops.rst;h=83be51c45f8d8e0e2297363bf816ef5483710f1b;hb=HEAD#l69

[root@fuel ~]# fuel2 --debug node list-vms-conf 2
404 Client Error: Not Found
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/cliff/app.py", line 374, in run_subcommand
    result = cmd.run(parsed_args)
  File "/usr/lib/python2.7/site-packages/cliff/display.py", line 92, in run
    column_names, data = self.take_action(parsed_args)
  File "/usr/lib/python2.7/site-packages/fuelclient/commands/node.py", line 135, in take_action
    data = self.client.get_node_vms_conf(parsed_args.id)
  File "/usr/lib/python2.7/site-packages/fuelclient/v1/node.py", line 54, in get_node_vms_conf
    return node.get_node_vms_conf()
  File "/usr/lib/python2.7/site-packages/fuelclient/objects/node.py", line 134, in get_node_vms_conf
    return self.connection.get_request(url)
  File "/usr/lib/python2.7/site-packages/fuelclient/client.py", line 192, in get_request
    resp.raise_for_status()
  File "/usr/lib/python2.7/site-packages/requests/models.py", line 851, in raise_for_status
    raise HTTPError(http_error_msg, response=self)
HTTPError: 404 Client Error: Not Found

I managed to enable "advanced" feature by editing directly nailgun settings:

[root@fuel ~]# dockerctl shell nailgun
[root@fuel ~]# vim /etc/nailgun/settings.yaml

..
FEATURE_GROUPS:
    - mirantis
    - advanced
..

[root@fuel ~]# systemctl restart nailgun.service
[root@fuel ~]# exit
[root@fuel ~]# fuel2 --debug node list-vms-conf 2
+----------+-------+
| Field | Value |
+----------+-------+
| vms_conf | - |
+----------+-------+

cat /etc/fuel/version.yaml
VERSION:
  feature_groups:
    - mirantis
    - advanced
  production: "docker"
  release: "8.0"
  api: "1.0"
  build_number: "570"
  build_id: "570"
  fuel-nailgun_sha: "558ca91a854cf29e395940c232911ffb851899c1"
  python-fuelclient_sha: "4f234669cfe88a9406f4e438b1e1f74f1ef484a5"
  fuel-agent_sha: "658be72c4b42d3e1436b86ac4567ab914bfb451b"
  fuel-nailgun-agent_sha: "b2bb466fd5bd92da614cdbd819d6999c510ebfb1"
  astute_sha: "b81577a5b7857c4be8748492bae1dec2fa89b446"
  fuel-library_sha: "c2a335b5b725f1b994f78d4c78723d29fa44685a"
  fuel-ostf_sha: "3bc76a63a9e7d195ff34eadc29552f4235fa6c52"
  fuel-mirror_sha: "fb45b80d7bee5899d931f926e5c9512e2b442749"
  fuelmenu_sha: "78ffc73065a9674b707c081d128cb7eea611474f"
  shotgun_sha: "63645dea384a37dde5c01d4f8905566978e5d906"
  network-checker_sha: "a43cf96cd9532f10794dce736350bf5bed350e9d"
  fuel-upgrade_sha: "616a7490ec7199f69759e97e42f9b97dfc87e85b"
  fuelmain_sha: "d605bcbabf315382d56d0ce8143458be67c53434"