sahara-api cannot start because Plugins couldn't be loaded: ambari

[Matthew Mosesohn]

sahara-engine and sahara-api are filled with errors:
Oct 20 11:03:12 node-1 sahara-engine: ConfigurationError: Plugins couldn't be loaded: ambari
Error ID: 0a344dc8-1adc-47d7-b4b7-a011b34e18f3
Oct 20 11:03:11 node-1 sahara-api: ConfigurationError: Plugins couldn't be loaded: ambari
Error ID: 40b75ea5-ddb3-4ad2-9db7-acc9bc47feac

Traceback:
2015-10-20 11:05:44.474 25398 ERROR sahara Traceback (most recent call last):
2015-10-20 11:05:44.474 25398 ERROR sahara File "/usr/bin/sahara-engine", line 10, in <module>
2015-10-20 11:05:44.474 25398 ERROR sahara sys.exit(main())
2015-10-20 11:05:44.474 25398 ERROR sahara File "/usr/lib/python2.7/dist-packages/sahara/cli/sahara_engine.py", line 50, in main
2015-10-20 11:05:44.474 25398 ERROR sahara server.setup_common(possible_topdir, 'engine')
2015-10-20 11:05:44.474 25398 ERROR sahara File "/usr/lib/python2.7/dist-packages/sahara/main.py", line 88, in setup_common
2015-10-20 11:05:44.474 25398 ERROR sahara plugins_base.setup_plugins()
2015-10-20 11:05:44.474 25398 ERROR sahara File "/usr/lib/python2.7/dist-packages/sahara/plugins/base.py", line 139, in setup_plugins
2015-10-20 11:05:44.474 25398 ERROR sahara PLUGINS = PluginManager()
2015-10-20 11:05:44.474 25398 ERROR sahara File "/usr/lib/python2.7/dist-packages/sahara/plugins/base.py", line 90, in __init__
2015-10-20 11:05:44.474 25398 ERROR sahara self._load_cluster_plugins()
2015-10-20 11:05:44.474 25398 ERROR sahara File "/usr/lib/python2.7/dist-packages/sahara/plugins/base.py", line 115, in _load_cluster_plugins
2015-10-20 11:05:44.474 25398 ERROR sahara ", ".join(requested_plugins - loaded_plugins))
2015-10-20 11:05:44.474 25398 ERROR sahara ConfigurationError: Plugins couldn't be loaded: ambari
2015-10-20 11:05:44.474 25398 ERROR sahara Error ID: 508a045c-54bb-4df0-a894-e02ef153b06b

How to reproduce:
1 - Deploy 1 controller with neutron GRE segmentation (no cinder, no compute, no ceph), enable Sahara

VERSION:
  feature_groups:
    - mirantis
  production: "docker"
  release: "8.0"
  openstack_version: "2015.1.0-8.0"
  api: "1.0"
  build_number: "243"
  build_id: "2015-10-16_13-57-36"
  fuel-nailgun_sha: "445cb68b3fdeec4836d92a3c8f7cb998b951f759"
  python-fuelclient_sha: "93a2e63d2a035c3f6f8ac2f7c3ba22b89696bbef"
  fuel-agent_sha: "5d2d5e2e9ad4f8bb01e450240d85447608d84b92"
  fuel-nailgun-agent_sha: "08e0a11cf1f29b705e4b910d9b9db5e9b708b6e3"
  astute_sha: "a090546d43c770ac27ca81c6f8c78ff0ba4a93e0"
  fuel-library_sha: "eb2ba3eb154cae59ef6f4d25d5c091e89d8b3044"
  fuel-ostf_sha: "6aeb20eeb40706879fe9f8d19ba21340d2c6dbb2"
  fuel-createmirror_sha: "fe81731b76071dc0a4ffdf039080732243f5a871"
  fuelmain_sha: "d873a118ef1efc6b7722feaa9a31c2ef48a3b53e"

[Matthew Mosesohn (raytrac3r)]

Sahara conf and packages:
http://paste.openstack.org/show/9m4uww0PJugdCOxZyCjE/

Sahara version is 3.0.0.0b2-1~u14.04+mos2412

[Evgeny Sikachev (esikachev)]

In this version of Sahara Ambari plugin is not added. Need update Sahara and this bug will be resolved

[Roman Podoliaka (rpodolyaka)]

Looks like you are using 8.0-Kilo ISO. Do we really need to fix it there? Is it reproduced on 8.0 Liberty ISO?

[Sergey Reshetnyak (sreshetniak)]

Fixed in stable/liberty

[ElenaRossokhina (esolomina)]

Verified on iso#507
VERSION:
  feature_groups:
    - mirantis
  production: "docker"
  release: "8.0"
  api: "1.0"
  build_number: "507"
  build_id: "507"
  fuel-nailgun_sha: "8e954abd70ef0083109f34289de2553dcda544d4"
  python-fuelclient_sha: "4f234669cfe88a9406f4e438b1e1f74f1ef484a5"
  fuel-agent_sha: "658be72c4b42d3e1436b86ac4567ab914bfb451b"
  fuel-nailgun-agent_sha: "b2bb466fd5bd92da614cdbd819d6999c510ebfb1"
  astute_sha: "b81577a5b7857c4be8748492bae1dec2fa89b446"
  fuel-library_sha: "ec7e212972ead554f21b52b9e165156665f659df"
  fuel-ostf_sha: "ab5fd151fc6c1aa0b35bc2023631b1f4836ecd61"
  fuel-mirror_sha: "351d568fa3b3e4dd062054b91d766aa54d379867"
  fuelmenu_sha: "234cb4cbb30fbd2df00f388c28f31606d9cae15f"
  shotgun_sha: "63645dea384a37dde5c01d4f8905566978e5d906"
  network-checker_sha: "a43cf96cd9532f10794dce736350bf5bed350e9d"
  fuel-upgrade_sha: "616a7490ec7199f69759e97e42f9b97dfc87e85b"
  fuelmain_sha: "94507c5e4dad6d8cfbd8f5d41aa8389d5335990a"