There is no validation of topology

1. Create topology file (the one defined in deploy_config), with node name that is not present in k8s cluster:

# kubectl get nodes
NAME STATUS AGE
127.0.0.1 Ready 22d

# cat /tmp/ccp-globals.yaml:

nodes:
  node1:
    roles:
      - controller
      - stacklight-collector
      - stacklight-backend
      - openvswitch
      - compute
roles:
...

2. Try to deploy with the command 'ccp deploy'

Actual result:

2016-09-06 21:06:28.229 9371 CRITICAL fuel-ccp [-] ApiException: (422)
Reason: status code 422
HTTP response headers: HTTPHeaderDict({'Date': 'Tue, 06 Sep 2016 18:06:28 GMT', 'Content-Length': '801', 'Content-Type': 'application/json'})
HTTP response body: {"kind":"Status","apiVersion":"v1","metadata":{},"status":"Failure","message":"DaemonSet.extensions \"stacklight-collector\" is invalid: spec.template.annotatio
ns.scheduler.alpha.kubernetes.io/affinity.nodeAffinity.requiredDuringSchedulingIgnoredDuringExecution.nodeSelectorTerms[0].matchExpressions[0].values: Required value: must be speci
fied when `operator` is 'In' or 'NotIn'","reason":"Invalid","details":{"name":"stacklight-collector","group":"extensions","kind":"DaemonSet","causes":[{"reason":"FieldValueRequired
","message":"Required value: must be specified when `operator` is 'In' or 'NotIn'","field":"spec.template.annotations.scheduler.alpha.kubernetes.io/affinity.nodeAffinity.requiredDu
ringSchedulingIgnoredDuringExecution.nodeSelectorTerms[0].matchExpressions[0].values"}]},"code":422}

2016-09-06 21:06:28.229 9371 ERROR fuel-ccp Traceback (most recent call last):
2016-09-06 21:06:28.229 9371 ERROR fuel-ccp File "/usr/local/bin/ccp", line 10, in <module>
2016-09-06 21:06:28.229 9371 ERROR fuel-ccp sys.exit(main())
2016-09-06 21:06:28.229 9371 ERROR fuel-ccp File "/usr/local/lib/python2.7/dist-packages/fuel_ccp/cli.py", line 53, in main
2016-09-06 21:06:28.229 9371 ERROR fuel-ccp func()
2016-09-06 21:06:28.229 9371 ERROR fuel-ccp File "/usr/local/lib/python2.7/dist-packages/fuel_ccp/cli.py", line 25, in do_deploy
2016-09-06 21:06:28.229 9371 ERROR fuel-ccp deploy.deploy_components(components=CONF.action.components)
2016-09-06 21:06:28.229 9371 ERROR fuel-ccp File "/usr/local/lib/python2.7/dist-packages/fuel_ccp/deploy.py", line 372, in deploy_components
2016-09-06 21:06:28.229 9371 ERROR fuel-ccp config)
2016-09-06 21:06:28.229 9371 ERROR fuel-ccp File "/usr/local/lib/python2.7/dist-packages/fuel_ccp/deploy.py", line 78, in parse_role
2016-09-06 21:06:28.229 9371 ERROR fuel-ccp kubernetes.create_object_from_definition(obj)
2016-09-06 21:06:28.229 9371 ERROR fuel-ccp File "/usr/local/lib/python2.7/dist-packages/fuel_ccp/kubernetes.py", line 58, in create_object_from_definition
2016-09-06 21:06:28.229 9371 ERROR fuel-ccp body=object_dict, namespace=namespace)
2016-09-06 21:06:28.229 9371 ERROR fuel-ccp File "/usr/local/lib/python2.7/dist-packages/k8sclient/client/apis/apisextensionsvbeta_api.py", line 749, in create_namespaced_daemon_
set
2016-09-06 21:06:28.229 9371 ERROR fuel-ccp callback=params.get('callback'))
2016-09-06 21:06:28.229 9371 ERROR fuel-ccp File "/usr/local/lib/python2.7/dist-packages/k8sclient/client/api_client.py", line 320, in call_api
2016-09-06 21:06:28.229 9371 ERROR fuel-ccp response_type, auth_settings, callback)
2016-09-06 21:06:28.229 9371 ERROR fuel-ccp File "/usr/local/lib/python2.7/dist-packages/k8sclient/client/api_client.py", line 150, in __call_api
2016-09-06 21:06:28.229 9371 ERROR fuel-ccp post_params=post_params, body=body)
2016-09-06 21:06:28.229 9371 ERROR fuel-ccp File "/usr/local/lib/python2.7/dist-packages/k8sclient/client/api_client.py", line 350, in request
2016-09-06 21:06:28.229 9371 ERROR fuel-ccp body=body)
2016-09-06 21:06:28.229 9371 ERROR fuel-ccp File "/usr/local/lib/python2.7/dist-packages/k8sclient/client/rest.py", line 270, in POST
2016-09-06 21:06:28.229 9371 ERROR fuel-ccp return self.IMPL.POST(*n, **kw)
2016-09-06 21:06:28.229 9371 ERROR fuel-ccp File "/usr/local/lib/python2.7/dist-packages/k8sclient/client/rest.py", line 192, in POST
2016-09-06 21:06:28.229 9371 ERROR fuel-ccp body=body)
2016-09-06 21:06:28.229 9371 ERROR fuel-ccp File "/usr/local/lib/python2.7/dist-packages/k8sclient/client/rest.py", line 168, in request
2016-09-06 21:06:28.229 9371 ERROR fuel-ccp raise ApiException(http_resp=r)
2016-09-06 21:06:28.229 9371 ERROR fuel-ccp ApiException: (422)
2016-09-06 21:06:28.229 9371 ERROR fuel-ccp Reason: status code 422

The error is cryptic and it's cause isn't obvious.

Expected result: there should be some kind of validation for topology file, which will provide a clear diagnostics, for example, in the described case the error report could be: 'there is no such node: node1'.