Add CM API lib into CDH plugin codes

We open a directory named "client" and add codes in it to support
API callings from CDH plugin codes, so that we can remove the
dependency on third party package cm_api. Most codes in client are
copied from cm_api source codes. We just changed some import
relationships, removed unused codes, and regulated a little to
make it pass pep8 test.

implements bp: add-lib-subset-cm-api

Change-Id: I73a66520f27271d628d1997c84c62140acb4aa54

sahara/plugins/cdh/client/api_client.py

@@ -0,0 +1,119 @@
+# Copyright (c) 2014 Intel Corporation.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# The contents of this file are mainly copied from cm_api sources,
+# released by Cloudrea. Codes not used by Sahara CDH plugin are removed.
+# You can find the original codes at
+#
+#     https://github.com/cloudera/cm_api/tree/master/python/src/cm_api
+#
+# To satisfy the pep8 and python3 tests, we did some changes to the codes.
+# We also change some importings to use Sahara inherited classes.
+
+from sahara.plugins.cdh.client import clusters
+from sahara.plugins.cdh.client import cms
+from sahara.plugins.cdh.client import hosts
+from sahara.plugins.cdh.client import http_client
+from sahara.plugins.cdh.client import resource
+
+API_AUTH_REALM = "Cloudera Manager"
+API_CURRENT_VERSION = 8
+
+
+class ApiResource(resource.Resource):
+    """Top-level API Resource
+
+    Resource object that provides methods for managing the top-level API
+    resources.
+    """
+
+    def __init__(self, server_host, server_port=None,
+                 username="admin", password="admin",
+                 use_tls=False, version=API_CURRENT_VERSION):
+        """Creates a Resource object that provides API endpoints.
+
+        :param server_host: The hostname of the Cloudera Manager server.
+        :param server_port: The port of the server. Defaults to 7180 (http) or
+            7183 (https).
+        :param username: Login name.
+        :param password: Login password.
+        :param use_tls: Whether to use tls (https).
+        :param version: API version.
+        :return: Resource object referring to the root.
+        """
+        self._version = version
+        protocol = "https" if use_tls else "http"
+        if server_port is None:
+            server_port = 7183 if use_tls else 7180
+        base_url = ("%s://%s:%s/api/v%s"
+                    % (protocol, server_host, server_port, version))
+
+        client = http_client.HttpClient(base_url)
+        client.set_basic_auth(username, password, API_AUTH_REALM)
+        client.set_headers({"Content-Type": "application/json"})
+        resource.Resource.__init__(self, client)
+
+    @property
+    def version(self):
+        """Returns the API version (integer) being used."""
+        return self._version
+
+    def get_cloudera_manager(self):
+        """Returns a Cloudera Manager object."""
+        return cms.ClouderaManager(self)
+
+    def create_cluster(self, name, version=None, fullVersion=None):
+        """Create a new cluster
+
+        :param name: Cluster name.
+        :param version: Cluster major CDH version, e.g. 'CDH5'. Ignored if
+            fullVersion is specified.
+        :param fullVersion: Complete CDH version, e.g. '5.1.2'. Overrides major
+            version if both specified.
+        :return: The created cluster.
+        """
+        return clusters.create_cluster(self, name, version, fullVersion)
+
+    def get_all_clusters(self, view=None):
+        """Retrieve a list of all clusters
+
+        :param view: View to materialize ('full' or 'summary').
+        :return: A list of ApiCluster objects.
+        """
+        return clusters.get_all_clusters(self, view)
+
+    def get_cluster(self, name):
+        """Look up a cluster by name
+
+        :param name: Cluster name.
+        :return: An ApiCluster object.
+        """
+        return clusters.get_cluster(self, name)
+
+    def delete_host(self, host_id):
+        """Delete a host by id
+
+        :param host_id: Host id
+        :return: The deleted ApiHost object
+        """
+        return hosts.delete_host(self, host_id)
+
+    def get_all_hosts(self, view=None):
+        """Get all hosts
+
+        :param view: View to materialize ('full' or 'summary').
+        :return: A list of ApiHost objects.
+        """
+        return hosts.get_all_hosts(self, view)

sahara/plugins/cdh/client/clusters.py

@@ -0,0 +1,166 @@
+# Copyright (c) 2014 Intel Corporation.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# The contents of this file are mainly copied from cm_api sources,
+# released by Cloudrea. Codes not used by Sahara CDH plugin are removed.
+# You can find the original codes at
+#
+#     https://github.com/cloudera/cm_api/tree/master/python/src/cm_api
+#
+# To satisfy the pep8 and python3 tests, we did some changes to the codes.
+# We also change some importings to use Sahara inherited classes.
+
+from sahara.i18n import _
+from sahara.plugins.cdh.client import services
+from sahara.plugins.cdh.client import types
+from sahara.plugins.cdh import exceptions as ex
+
+CLUSTERS_PATH = "/clusters"
+
+
+def create_cluster(resource_root, name, version=None, fullVersion=None):
+    """Create a cluster
+
+    :param resource_root: The root Resource object.
+    :param name: Cluster name
+    :param version: Cluster CDH major version (eg: "CDH4")
+                    - The CDH minor version will be assumed to be the
+                      latest released version for CDH4, or 5.0 for CDH5.
+    :param fullVersion: Cluster's full CDH version. (eg: "5.1.1")
+                        - If specified, 'version' will be ignored.
+                        - Since: v6
+    :return: An ApiCluster object
+    """
+    if version is None and fullVersion is None:
+        raise ex.CMApiVersionError(
+            _("Either 'version' or 'fullVersion' must be specified"))
+    if fullVersion is not None:
+        api_version = 6
+        version = None
+    else:
+        api_version = 1
+
+    apicluster = ApiCluster(resource_root, name, version, fullVersion)
+    return types.call(resource_root.post, CLUSTERS_PATH, ApiCluster, True,
+                      data=[apicluster], api_version=api_version)[0]
+
+
+def get_cluster(resource_root, name):
+    """Lookup a cluster by name
+
+    :param resource_root: The root Resource object.
+    :param name: Cluster name
+    :return: An ApiCluster object
+    """
+    return types.call(resource_root.get, "%s/%s"
+                      % (CLUSTERS_PATH, name), ApiCluster)
+
+
+def get_all_clusters(resource_root, view=None):
+    """Get all clusters
+
+    :param resource_root: The root Resource object.
+    :return: A list of ApiCluster objects.
+    """
+    return types.call(resource_root.get, CLUSTERS_PATH, ApiCluster, True,
+                      params=(dict(view=view) if view else None))
+
+
+class ApiCluster(types.BaseApiResource):
+    _ATTRIBUTES = {
+        'name': None,
+        'displayName': None,
+        'version': None,
+        'fullVersion': None,
+        'maintenanceMode': types.ROAttr(),
+        'maintenanceOwners': types.ROAttr(),
+    }
+
+    def __init__(self, resource_root, name=None, version=None,
+                 fullVersion=None):
+        types.BaseApiObject.init(self, resource_root, locals())
+
+    def _path(self):
+        return "%s/%s" % (CLUSTERS_PATH, self.name)
+
+    def get_service_types(self):
+        """Get all service types supported by this cluster
+
+        :return: A list of service types (strings)
+        """
+        resp = self._get_resource_root().get(self._path() + '/serviceTypes')
+        return resp[types.ApiList.LIST_KEY]
+
+    def get_commands(self, view=None):
+        """Retrieve a list of running commands for this cluster
+
+        :param view: View to materialize ('full' or 'summary')
+        :return: A list of running commands.
+        """
+        return self._get("commands", types.ApiCommand, True,
+                         params=(dict(view=view) if view else None))
+
+    def create_service(self, name, service_type):
+        """Create a service
+
+        :param name: Service name
+        :param service_type: Service type
+        :return: An ApiService object
+        """
+        return services.create_service(self._get_resource_root(), name,
+                                       service_type, self.name)
+
+    def get_service(self, name):
+        """Lookup a service by name
+
+        :param name: Service name
+        :return: An ApiService object
+        """
+        return services.get_service(self._get_resource_root(),
+                                    name, self.name)
+
+    def start(self):
+        """Start all services in a cluster, respecting dependencies
+
+        :return: Reference to the submitted command.
+        """
+        return self._cmd('start')
+
+    def deploy_client_config(self):
+        """Deploys Service client configuration to the hosts on the cluster
+
+        :return: Reference to the submitted command.
+        :since: API v2
+        """
+        return self._cmd('deployClientConfig')
+
+    def first_run(self):
+        """Prepare and start services in a cluster
+
+        Perform all the steps needed to prepare each service in a
+        cluster and start the services in order.
+
+        :return: Reference to the submitted command.
+        :since: API v7
+        """
+        return self._cmd('firstRun', None, api_version=7)
+
+    def remove_host(self, hostId):
+        """Removes the association of the host with the cluster
+
+        :return: A ApiHostRef of the host that was removed.
+        :since: API v3
+        """
+        return self._delete("hosts/" + hostId, types.ApiHostRef, api_version=3)

sahara/plugins/cdh/client/cms.py

@@ -0,0 +1,62 @@
+# Copyright (c) 2014 Intel Corporation.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# The contents of this file are mainly copied from cm_api sources,
+# released by Cloudrea. Codes not used by Sahara CDH plugin are removed.
+# You can find the original codes at
+#
+#     https://github.com/cloudera/cm_api/tree/master/python/src/cm_api
+#
+# To satisfy the pep8 and python3 tests, we did some changes to the codes.
+# We also change some importings to use Sahara inherited classes.
+
+from sahara.plugins.cdh.client.services import ApiService
+from sahara.plugins.cdh.client import types
+
+
+class ClouderaManager(types.BaseApiResource):
+    """The Cloudera Manager instance
+
+    Provides access to CM configuration and services.
+    """
+    def __init__(self, resource_root):
+        types.BaseApiObject.init(self, resource_root)
+
+    def _path(self):
+        return '/cm'
+
+    def create_mgmt_service(self, service_setup_info):
+        """Setup the Cloudera Management Service
+
+        :param service_setup_info: ApiServiceSetupInfo object.
+        :return: The management service instance.
+        """
+        return self._put("service", ApiService, data=service_setup_info)
+
+    def get_service(self):
+        """Return the Cloudera Management Services instance
+
+        :return: An ApiService instance.
+        """
+        return self._get("service", ApiService)
+
+    def hosts_start_roles(self, host_names):
+        """Start all the roles on the specified hosts
+
+        :param host_names: List of names of hosts on which to start all roles.
+        :return: Information about the submitted command.
+        :since: API v2
+        """
+        return self._cmd('hostsStartRoles', data=host_names)

sahara/plugins/cdh/client/hosts.py

@@ -0,0 +1,87 @@
+# Copyright (c) 2014 Intel Corporation.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# The contents of this file are mainly copied from cm_api sources,
+# released by Cloudrea. Codes not used by Sahara CDH plugin are removed.
+# You can find the original codes at
+#
+#     https://github.com/cloudera/cm_api/tree/master/python/src/cm_api
+#
+# To satisfy the pep8 and python3 tests, we did some changes to the codes.
+# We also change some importings to use Sahara inherited classes.
+
+import datetime
+
+from sahara.plugins.cdh.client import types
+
+HOSTS_PATH = "/hosts"
+
+
+def get_all_hosts(resource_root, view=None):
+    """Get all hosts
+
+    :param resource_root: The root Resource object.
+    :return: A list of ApiHost objects.
+    """
+    return types.call(resource_root.get, HOSTS_PATH, ApiHost, True,
+                      params=(dict(view=view) if view else None))
+
+
+def delete_host(resource_root, host_id):
+    """Delete a host by id
+
+    :param resource_root: The root Resource object.
+    :param host_id: Host id
+    :return: The deleted ApiHost object
+    """
+    return types.call(resource_root.delete, "%s/%s"
+                      % (HOSTS_PATH, host_id), ApiHost)
+
+
+class ApiHost(types.BaseApiResource):
+    _ATTRIBUTES = {
+        'hostId': None,
+        'hostname': None,
+        'ipAddress': None,
+        'rackId': None,
+        'status': types.ROAttr(),
+        'lastHeartbeat': types.ROAttr(datetime.datetime),
+        'roleRefs': types.ROAttr(types.ApiRoleRef),
+        'healthSummary': types.ROAttr(),
+        'healthChecks': types.ROAttr(),
+        'hostUrl': types.ROAttr(),
+        'commissionState': types.ROAttr(),
+        'maintenanceMode': types.ROAttr(),
+        'maintenanceOwners': types.ROAttr(),
+        'numCores': types.ROAttr(),
+        'totalPhysMemBytes': types.ROAttr(),
+    }
+
+    def __init__(self, resource_root, hostId=None, hostname=None,
+                 ipAddress=None, rackId=None):
+        types.BaseApiObject.init(self, resource_root, locals())
+
+    def __str__(self):
+        return "<ApiHost>: %s (%s)" % (self.hostId, self.ipAddress)
+
+    def _path(self):
+        return HOSTS_PATH + '/' + self.hostId
+
+    def _put_host(self):
+        """Update this resource
+
+        :return: The updated object.
+        """
+        return self._put('', ApiHost, data=self)

sahara/plugins/cdh/client/http_client.py

@@ -0,0 +1,209 @@
+# Copyright (c) 2014 Intel Corporation.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# The contents of this file are mainly copied from cm_api sources,
+# released by Cloudrea. Codes not used by Sahara CDH plugin are removed.
+# You can find the original codes at
+#
+#     https://github.com/cloudera/cm_api/tree/master/python/src/cm_api
+#
+# To satisfy the pep8 and python3 tests, we did some changes to the codes.
+# We also change some importings to use Sahara inherited classes.
+
+import cookielib
+import json
+import posixpath
+import types
+import urllib
+import urllib2
+
+from oslo_log import log as logging
+import six
+
+from sahara.i18n import _LW
+from sahara.plugins.cdh import exceptions as ex
+
+LOG = logging.getLogger(__name__)
+
+
+class HttpClient(object):
+    """Basic HTTP client tailored for rest APIs."""
+    def __init__(self, base_url, exc_class=ex.CMApiException):
+        """Init Method
+
+        :param base_url: The base url to the API.
+        :param exc_class: An exception class to handle non-200 results.
+
+        Creates an HTTP(S) client to connect to the Cloudera Manager API.
+        """
+        self._base_url = base_url.rstrip('/')
+        self._exc_class = exc_class
+        self._headers = {}
+
+        # Make a basic auth handler that does nothing. Set credentials later.
+        self._passmgr = urllib2.HTTPPasswordMgrWithDefaultRealm()
+        authhandler = urllib2.HTTPBasicAuthHandler(self._passmgr)
+
+        # Make a cookie processor
+        cookiejar = cookielib.CookieJar()
+
+        self._opener = urllib2.build_opener(
+            urllib2.HTTPErrorProcessor(),
+            urllib2.HTTPCookieProcessor(cookiejar),
+            authhandler)
+
+    def set_basic_auth(self, username, password, realm):
+        """Set up basic auth for the client
+
+        :param username: Login name.
+        :param password: Login password.
+        :param realm: The authentication realm.
+        :return: The current object
+        """
+        self._passmgr.add_password(realm, self._base_url, username, password)
+        return self
+
+    def set_headers(self, headers):
+        """Add headers to the request
+
+        :param headers: A dictionary with the key value pairs for the headers
+        :return: The current object
+        """
+        self._headers = headers
+        return self
+
+    @property
+    def base_url(self):
+        return self._base_url
+
+    def _get_headers(self, headers):
+        res = self._headers.copy()
+        if headers:
+            res.update(headers)
+        return res
+
+    def execute(self, http_method, path, params=None, data=None, headers=None):
+        """Submit an HTTP request
+
+        :param http_method: GET, POST, PUT, DELETE
+        :param path: The path of the resource.
+        :param params: Key-value parameter data.
+        :param data: The data to attach to the body of the request.
+        :param headers: The headers to set for this request.
+
+        :return: The result of urllib2.urlopen()
+        """
+        # Prepare URL and params
+        url = self._make_url(path, params)
+        if http_method in ("GET", "DELETE"):
+            if data is not None:
+                LOG.warn(_LW("%(method)s method does not pass any data."
+                             " Path '%(path)s'"),
+                         {'method': http_method, 'path': path})
+                data = None
+
+        # Setup the request
+        request = urllib2.Request(url, data)
+        # Hack/workaround because urllib2 only does GET and POST
+        request.get_method = lambda: http_method
+
+        headers = self._get_headers(headers)
+        for k, v in headers.items():
+            request.add_header(k, v)
+
+        # Call it
+        LOG.debug("Method: %s, URL: %s" % (http_method, url))
+        try:
+            return self._opener.open(request)
+        except urllib2.HTTPError as ex:
+            message = six.text_type(ex)
+            try:
+                json_body = json.loads(message)
+                message = json_body['message']
+            except (ValueError, KeyError):
+                pass    # Ignore json parsing error
+            raise self._exc_class(message)
+
+    def _make_url(self, path, params):
+        res = self._base_url
+        if path:
+            res += posixpath.normpath('/' + path.lstrip('/'))
+        if params:
+            param_str = urllib.urlencode(params, True)
+            res += '?' + param_str
+        return iri_to_uri(res)
+
+
+#
+# Method copied from Django
+#
+def iri_to_uri(iri):
+    """Convert IRI to URI
+
+    Convert an Internationalized Resource Identifier (IRI) portion to a URI
+    portion that is suitable for inclusion in a URL.
+
+    This is the algorithm from section 3.1 of RFC 3987.  However, since we are
+    assuming input is either UTF-8 or unicode already, we can simplify things a
+    little from the full method.
+
+    Returns an ASCII string containing the encoded result.
+    """
+    # The list of safe characters here is constructed from the "reserved" and
+    # "unreserved" characters specified in sections 2.2 and 2.3 of RFC 3986:
+    #     reserved    = gen-delims / sub-delims
+    #     gen-delims  = ":" / "/" / "?" / "#" / "[" / "]" / "@"
+    #     sub-delims  = "!" / "$" / "&" / "'" / "(" / ")"
+    #                   / "*" / "+" / "," / ";" / "="
+    #     unreserved  = ALPHA / DIGIT / "-" / "." / "_" / "~"
+    # Of the unreserved characters, urllib.quote already considers all but
+    # the ~ safe.
+    # The % character is also added to the list of safe characters here, as the
+    # end of section 3.1 of RFC 3987 specifically mentions that % must not be
+    # converted.
+    if iri is None:
+        return iri
+    return urllib.quote(smart_str(iri), safe="/#%[]=:;$&()+,!?*@'~")
+
+
+#
+# Method copied from Django
+#
+def smart_str(s, encoding='utf-8', strings_only=False, errors='strict'):
+    """Convert string into bytestring version
+
+    Returns a bytestring version of 's', encoded as specified in 'encoding'.
+
+    If strings_only is True, don't convert (some) non-string-like objects.
+    """
+    if strings_only and isinstance(s, (types.NoneType, int)):
+        return s
+    elif not isinstance(s, basestring):
+        try:
+            return six.text_type(s)
+        except UnicodeEncodeError:
+            if isinstance(s, Exception):
+                # An Exception subclass containing non-ASCII data that doesn't
+                # know how to print itself properly. We shouldn't raise a
+                # further exception.
+                return ' '.join([smart_str(arg, encoding, strings_only,
+                                errors) for arg in s])
+            return unicode(s).encode(encoding, errors)
+    elif isinstance(s, unicode):
+        return s.encode(encoding, errors)
+    elif s and encoding != 'utf-8':
+        return s.decode('utf-8', errors).encode(encoding, errors)
+    else:
+        return s

sahara/plugins/cdh/client/resource.py

@@ -0,0 +1,168 @@
+# Copyright (c) 2014 Intel Corporation.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# The contents of this file are mainly copied from cm_api sources,
+# released by Cloudrea. Codes not used by Sahara CDH plugin are removed.
+# You can find the original codes at
+#
+#     https://github.com/cloudera/cm_api/tree/master/python/src/cm_api
+#
+# To satisfy the pep8 and python3 tests, we did some changes to the codes.
+# We also change some importings to use Sahara inherited classes.
+
+import json
+import posixpath
+import socket
+import urllib2
+
+from oslo_log import log as logging
+import six
+
+from sahara import context
+from sahara.i18n import _
+from sahara.i18n import _LE
+from sahara.i18n import _LW
+from sahara.plugins.cdh import exceptions as ex
+
+LOG = logging.getLogger(__name__)
+
+
+class Resource(object):
+    """Base Resource
+
+    Encapsulates a resource, and provides actions to invoke on it.
+    """
+    def __init__(self, client, relpath=""):
+        """Constructor method
+
+        :param client: A Client object.
+        :param relpath: The relative path of the resource.
+        """
+        self._client = client
+        self._path = relpath.strip('/')
+        self.retries = 3
+        self.retry_sleep = 3
+
+    @property
+    def base_url(self):
+        return self._client.base_url
+
+    def _join_uri(self, relpath):
+        if relpath is None:
+            return self._path
+        return self._path + posixpath.normpath('/' + relpath)
+
+    def invoke(self, method, relpath=None, params=None, data=None,
+               headers=None):
+        """Invoke an API method
+
+        :return: Raw body or JSON dictionary (if response content type is
+                 JSON).
+        """
+        path = self._join_uri(relpath)
+        resp = self._client.execute(method,
+                                    path,
+                                    params=params,
+                                    data=data,
+                                    headers=headers)
+        try:
+            body = resp.read()
+        except Exception as ex:
+            raise ex.CMApiException(
+                _("Command %(method)s %(path)s failed: %(msg)s")
+                % {'method': method, 'path': path, 'msg': six.text_type(ex)})
+
+        LOG.debug("%s Got response: %s%s"
+                  % (method, body[:32], "..." if len(body) > 32 else ""))
+
+        # Is the response application/json?
+        if (len(body) != 0 and resp.info().getmaintype() == "application"
+                and resp.info().getsubtype() == "json"):
+            try:
+                json_dict = json.loads(body)
+                return json_dict
+            except Exception as ex:
+                LOG.exception(_LE('JSON decode error: %s'), body)
+                raise ex
+        else:
+            return body
+
+    def get(self, relpath=None, params=None):
+        """Invoke the GET method on a resource
+
+        :param relpath: Optional. A relative path to this resource's path.
+        :param params: Key-value data.
+
+        :return: A dictionary of the JSON result.
+        """
+        for retry in six.moves.xrange(self.retries + 1):
+            if retry:
+                context.sleep(self.retry_sleep)
+            try:
+                return self.invoke("GET", relpath, params)
+            except (socket.error, urllib2.URLError) as e:
+                if "timed out" in six.text_type(e).lower():
+                    LOG.warn(
+                        _LW("Timeout issuing GET request for"
+                            " %(path)s. %(post_msg)s")
+                        % {'path': self._join_uri(relpath),
+                           'post_msg':
+                               _LW("Will retry") if retry < self.retries
+                               else _LW("No retries left.")})
+                else:
+                    raise e
+        else:
+            raise ex.CMApiException(_("Get retry max time reached."))
+
+    def delete(self, relpath=None, params=None):
+        """Invoke the DELETE method on a resource
+
+        :param relpath: Optional. A relative path to this resource's path.
+        :param params: Key-value data.
+
+        :return: A dictionary of the JSON result.
+        """
+        return self.invoke("DELETE", relpath, params)
+
+    def post(self, relpath=None, params=None, data=None, contenttype=None):
+        """Invoke the POST method on a resource
+
+        :param relpath: Optional. A relative path to this resource's path.
+        :param params: Key-value data.
+        :param data: Optional. Body of the request.
+        :param contenttype: Optional.
+
+        :return: A dictionary of the JSON result.
+        """
+        return self.invoke("POST", relpath, params, data,
+                           self._make_headers(contenttype))
+
+    def put(self, relpath=None, params=None, data=None, contenttype=None):
+        """Invoke the PUT method on a resource
+
+        :param relpath: Optional. A relative path to this resource's path.
+        :param params: Key-value data.
+        :param data: Optional. Body of the request.
+        :param contenttype: Optional.
+
+        :return: A dictionary of the JSON result.
+        """
+        return self.invoke("PUT", relpath, params, data,
+                           self._make_headers(contenttype))
+
+    def _make_headers(self, contenttype=None):
+        if contenttype:
+            return {'Content-Type': contenttype}
+        return None

sahara/plugins/cdh/client/role_config_groups.py

@@ -0,0 +1,108 @@
+# Copyright (c) 2014 Intel Corporation.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# The contents of this file are mainly copied from cm_api sources,
+# released by Cloudrea. Codes not used by Sahara CDH plugin are removed.
+# You can find the original codes at
+#
+#     https://github.com/cloudera/cm_api/tree/master/python/src/cm_api
+#
+# To satisfy the pep8 and python3 tests, we did some changes to the codes.
+# We also change some importings to use Sahara inherited classes.
+
+from sahara.plugins.cdh.client import types
+
+ROLE_CONFIG_GROUPS_PATH = "/clusters/%s/services/%s/roleConfigGroups"
+CM_ROLE_CONFIG_GROUPS_PATH = "/cm/service/roleConfigGroups"
+
+
+def _get_role_config_groups_path(cluster_name, service_name):
+    if cluster_name:
+        return ROLE_CONFIG_GROUPS_PATH % (cluster_name, service_name)
+    else:
+        return CM_ROLE_CONFIG_GROUPS_PATH
+
+
+def _get_role_config_group_path(cluster_name, service_name, name):
+    path = _get_role_config_groups_path(cluster_name, service_name)
+    return "%s/%s" % (path, name)
+
+
+def get_all_role_config_groups(resource_root, service_name,
+                               cluster_name="default"):
+    """Get all role config groups in the specified service
+
+    :param resource_root: The root Resource object.
+    :param service_name: Service name.
+    :param cluster_name: Cluster name.
+    :return: A list of ApiRoleConfigGroup objects.
+    :since: API v3
+    """
+    return types.call(resource_root.get,
+                      _get_role_config_groups_path(cluster_name, service_name),
+                      ApiRoleConfigGroup, True, api_version=3)
+
+
+class ApiRoleConfigGroup(types.BaseApiResource):
+    _ATTRIBUTES = {
+        'name': None,
+        'displayName': None,
+        'roleType': None,
+        'config': types.Attr(types.ApiConfig),
+        'base': types.ROAttr(),
+        'serviceRef': types.ROAttr(types.ApiServiceRef),
+    }
+
+    def __init__(self, resource_root, name=None, displayName=None,
+                 roleType=None, config=None):
+        types.BaseApiObject.init(self, resource_root, locals())
+
+    def __str__(self):
+        return ("<ApiRoleConfigGroup>: %s (cluster: %s; service: %s)"
+                % (self.name, self.serviceRef.clusterName,
+                   self.serviceRef.serviceName))
+
+    def _api_version(self):
+        return 3
+
+    def _path(self):
+        return _get_role_config_group_path(self.serviceRef.clusterName,
+                                           self.serviceRef.serviceName,
+                                           self.name)
+
+    def get_config(self, view=None):
+        """Retrieve the group's configuration
+
+        The 'summary' view contains strings as the dictionary values. The full
+        view contains types.ApiConfig instances as the values.
+
+        :param view: View to materialize ('full' or 'summary').
+        :return: Dictionary with configuration data.
+        """
+        path = self._path() + '/config'
+        resp = self._get_resource_root().get(
+            path, params=(dict(view=view) if view else None))
+        return types.json_to_config(resp, view == 'full')
+
+    def update_config(self, config):
+        """Update the group's configuration
+
+        :param config: Dictionary with configuration to update.
+        :return: Dictionary with updated configuration.
+        """
+        path = self._path() + '/config'
+        resp = self._get_resource_root().put(
+            path, data=types.config_to_json(config))
+        return types.json_to_config(resp)

sahara/plugins/cdh/client/roles.py

@@ -0,0 +1,187 @@
+# Copyright (c) 2014 Intel Corporation.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# The contents of this file are mainly copied from cm_api sources,
+# released by Cloudrea. Codes not used by Sahara CDH plugin are removed.
+# You can find the original codes at
+#
+#     https://github.com/cloudera/cm_api/tree/master/python/src/cm_api
+#
+# To satisfy the pep8 and python3 tests, we did some changes to the codes.
+# We also change some importings to use Sahara inherited classes.
+
+from sahara.plugins.cdh.client import types
+
+ROLES_PATH = "/clusters/%s/services/%s/roles"
+CM_ROLES_PATH = "/cm/service/roles"
+
+
+def _get_roles_path(cluster_name, service_name):
+    if cluster_name:
+        return ROLES_PATH % (cluster_name, service_name)
+    else:
+        return CM_ROLES_PATH
+
+
+def _get_role_path(cluster_name, service_name, role_name):
+    path = _get_roles_path(cluster_name, service_name)
+    return "%s/%s" % (path, role_name)
+
+
+def create_role(resource_root,
+                service_name,
+                role_type,
+                role_name,
+                host_id,
+                cluster_name="default"):
+    """Create a role
+
+    :param resource_root: The root Resource object.
+    :param service_name: Service name
+    :param role_type: Role type
+    :param role_name: Role name
+    :param cluster_name: Cluster name
+    :return: An ApiRole object
+    """
+    apirole = ApiRole(resource_root, role_name, role_type,
+                      types.ApiHostRef(resource_root, host_id))
+    return types.call(resource_root.post,
+                      _get_roles_path(cluster_name, service_name),
+                      ApiRole, True, data=[apirole])[0]
+
+
+def get_role(resource_root, service_name, name, cluster_name="default"):
+    """Lookup a role by name
+
+    :param resource_root: The root Resource object.
+    :param service_name: Service name
+    :param name: Role name
+    :param cluster_name: Cluster name
+    :return: An ApiRole object
+    """
+    return _get_role(resource_root, _get_role_path(cluster_name,
+                     service_name, name))
+
+
+def _get_role(resource_root, path):
+    return types.call(resource_root.get, path, ApiRole)
+
+
+def get_all_roles(resource_root, service_name, cluster_name="default",
+                  view=None):
+    """Get all roles
+
+    :param resource_root: The root Resource object.
+    :param service_name: Service name
+    :param cluster_name: Cluster name
+    :return: A list of ApiRole objects.
+    """
+    return types.call(resource_root.get,
+                      _get_roles_path(cluster_name, service_name), ApiRole,
+                      True, params=(dict(view=view) if view else None))
+
+
+def get_roles_by_type(resource_root, service_name, role_type,
+                      cluster_name="default", view=None):
+    """Get all roles of a certain type in a service
+
+    :param resource_root: The root Resource object.
+    :param service_name: Service name
+    :param role_type: Role type
+    :param cluster_name: Cluster name
+    :return: A list of ApiRole objects.
+    """
+    roles = get_all_roles(resource_root, service_name, cluster_name, view)
+    return [r for r in roles if r.type == role_type]
+
+
+def delete_role(resource_root, service_name, name, cluster_name="default"):
+    """Delete a role by name
+
+    :param resource_root: The root Resource object.
+    :param service_name: Service name
+    :param name: Role name
+    :param cluster_name: Cluster name
+    :return: The deleted ApiRole object
+    """
+    return types.call(resource_root.delete,
+                      _get_role_path(cluster_name, service_name, name),
+                      ApiRole)
+
+
+class ApiRole(types.BaseApiResource):
+    _ATTRIBUTES = {
+        'name': None,
+        'type': None,
+        'hostRef': types.Attr(types.ApiHostRef),
+        'roleState': types.ROAttr(),
+        'healthSummary': types.ROAttr(),
+        'healthChecks': types.ROAttr(),
+        'serviceRef': types.ROAttr(types.ApiServiceRef),
+        'configStale': types.ROAttr(),
+        'configStalenessStatus': types.ROAttr(),
+        'haStatus': types.ROAttr(),
+        'roleUrl': types.ROAttr(),
+        'commissionState': types.ROAttr(),
+        'maintenanceMode': types.ROAttr(),
+        'maintenanceOwners': types.ROAttr(),
+        'roleConfigGroupRef': types.ROAttr(types.ApiRoleConfigGroupRef),
+        'zooKeeperServerMode': types.ROAttr(),
+    }
+
+    def __init__(self, resource_root, name=None, type=None, hostRef=None):
+        types.BaseApiObject.init(self, resource_root, locals())
+
+    def __str__(self):
+        return ("<ApiRole>: %s (cluster: %s; service: %s)"
+                % (self.name, self.serviceRef.clusterName,
+                   self.serviceRef.serviceName))
+
+    def _path(self):
+        return _get_role_path(self.serviceRef.clusterName,
+                              self.serviceRef.serviceName,
+                              self.name)
+
+    def _get_log(self, log):
+        path = "%s/logs/%s" % (self._path(), log)
+        return self._get_resource_root().get(path)
+
+    def get_commands(self, view=None):
+        """Retrieve a list of running commands for this role
+
+        :param view: View to materialize ('full' or 'summary')
+        :return: A list of running commands.
+        """
+        return self._get("commands", types.ApiCommand, True,
+                         params=(dict(view=view) if view else None))
+
+    def get_config(self, view=None):
+        """Retrieve the role's configuration
+
+        The 'summary' view contains strings as the dictionary values. The full
+        view contains types.ApiConfig instances as the values.
+
+        :param view: View to materialize ('full' or 'summary')
+        :return: Dictionary with configuration data.
+        """
+        return self._get_config("config", view)
+
+    def update_config(self, config):
+        """Update the role's configuration
+
+        :param config: Dictionary with configuration to update.
+        :return: Dictionary with updated configuration.
+        """
+        return self._update_config("config", config)

sahara/plugins/cdh/client/services.py

@@ -0,0 +1,423 @@
+# Copyright (c) 2014 Intel Corporation.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# The contents of this file are mainly copied from cm_api sources,
+# released by Cloudrea. Codes not used by Sahara CDH plugin are removed.
+# You can find the original codes at
+#
+#     https://github.com/cloudera/cm_api/tree/master/python/src/cm_api
+#
+# To satisfy the pep8 and python3 tests, we did some changes to the codes.
+# We also change some importings to use Sahara inherited classes.
+
+import json
+
+import six
+
+from sahara.plugins.cdh.client import role_config_groups
+from sahara.plugins.cdh.client import roles
+from sahara.plugins.cdh.client import types
+
+SERVICES_PATH = "/clusters/%s/services"
+SERVICE_PATH = "/clusters/%s/services/%s"
+ROLETYPES_CFG_KEY = 'roleTypeConfigs'
+
+
+def create_service(resource_root, name, service_type,
+                   cluster_name="default"):
+    """Create a service
+
+    :param resource_root: The root Resource object.
+    :param name: Service name
+    :param service_type: Service type
+    :param cluster_name: Cluster name
+    :return: An ApiService object
+    """
+    apiservice = ApiService(resource_root, name, service_type)
+    return types.call(resource_root.post, SERVICES_PATH % (cluster_name,),
+                      ApiService, True, data=[apiservice])[0]
+
+
+def get_service(resource_root, name, cluster_name="default"):
+    """Lookup a service by name
+
+    :param resource_root: The root Resource object.
+    :param name: Service name
+    :param cluster_name: Cluster name
+    :return: An ApiService object
+    """
+    return _get_service(resource_root, "%s/%s"
+                        % (SERVICES_PATH % (cluster_name,), name))
+
+
+def _get_service(resource_root, path):
+    return types.call(resource_root.get, path, ApiService)
+
+
+def get_all_services(resource_root, cluster_name="default", view=None):
+    """Get all services
+
+    :param resource_root: The root Resource object.
+    :param cluster_name: Cluster name
+    :return: A list of ApiService objects.
+    """
+    return types.call(resource_root.get, SERVICES_PATH % (cluster_name,),
+                      ApiService, True,
+                      params=(dict(view=view) if view else None))
+
+
+def delete_service(resource_root, name, cluster_name="default"):
+    """Delete a service by name
+
+    :param resource_root: The root Resource object.
+    :param name: Service name
+    :param cluster_name: Cluster name
+    :return: The deleted ApiService object
+    """
+    return types.call(resource_root.delete,
+                      "%s/%s" % (SERVICES_PATH % (cluster_name,), name),
+                      ApiService)
+
+
+class ApiService(types.BaseApiResource):
+    _ATTRIBUTES = {
+        'name': None,
+        'type': None,
+        'displayName': None,
+        'serviceState': types.ROAttr(),
+        'healthSummary': types.ROAttr(),
+        'healthChecks': types.ROAttr(),
+        'clusterRef': types.ROAttr(types.ApiClusterRef),
+        'configStale': types.ROAttr(),
+        'configStalenessStatus': types.ROAttr(),
+        'clientConfigStalenessStatus': types.ROAttr(),
+        'serviceUrl': types.ROAttr(),
+        'maintenanceMode': types.ROAttr(),
+        'maintenanceOwners': types.ROAttr(),
+    }
+
+    def __init__(self, resource_root, name=None, type=None):
+        types.BaseApiObject.init(self, resource_root, locals())
+
+    def __str__(self):
+        return ("<ApiService>: %s (cluster: %s)"
+                % (self.name, self._get_cluster_name()))
+
+    def _get_cluster_name(self):
+        if hasattr(self, 'clusterRef') and self.clusterRef:
+            return self.clusterRef.clusterName
+        return None
+
+    def _path(self):
+        """Return the API path for this service
+
+        This method assumes that lack of a cluster reference means that the
+        object refers to the Cloudera Management Services instance.
+        """
+        if self._get_cluster_name():
+            return SERVICE_PATH % (self._get_cluster_name(), self.name)
+        else:
+            return '/cm/service'
+
+    def _role_cmd(self, cmd, roles, api_version=1):
+        return self._post("roleCommands/" + cmd, types.ApiBulkCommandList,
+                          data=roles, api_version=api_version)
+
+    def _parse_svc_config(self, json_dic, view=None):
+        """Parse a json-decoded ApiServiceConfig dictionary into a 2-tuple
+
+        :param json_dic: The json dictionary with the config data.
+        :param view: View to materialize.
+        :return: 2-tuple (service config dictionary, role type configurations)
+        """
+        svc_config = types.json_to_config(json_dic, view == 'full')
+        rt_configs = {}
+        if ROLETYPES_CFG_KEY in json_dic:
+            for rt_config in json_dic[ROLETYPES_CFG_KEY]:
+                rt_configs[rt_config['roleType']] = types.json_to_config(
+                    rt_config, view == 'full')
+
+        return (svc_config, rt_configs)
+
+    def create_yarn_job_history_dir(self):
+        """Create the Yarn job history directory
+
+        :return: Reference to submitted command.
+        :since: API v6
+        """
+        return self._cmd('yarnCreateJobHistoryDirCommand', api_version=6)
+
+    def get_config(self, view=None):
+        """Retrieve the service's configuration
+
+        Retrieves both the service configuration and role type configuration
+        for each of the service's supported role types. The role type
+        configurations are returned as a dictionary, whose keys are the
+        role type name, and values are the respective configuration
+        dictionaries.
+
+        The 'summary' view contains strings as the dictionary values. The full
+        view contains types.ApiConfig instances as the values.
+
+        :param view: View to materialize ('full' or 'summary')
+        :return: 2-tuple (service config dictionary, role type configurations)
+        """
+        path = self._path() + '/config'
+        resp = self._get_resource_root().get(
+            path, params=(dict(view=view) if view else None))
+        return self._parse_svc_config(resp, view)
+
+    def update_config(self, svc_config, **rt_configs):
+        """Update the service's configuration
+
+        :param svc_config: Dictionary with service configuration to update.
+        :param rt_configs: Dict of role type configurations to update.
+        :return: 2-tuple (service config dictionary, role type configurations)
+        """
+        path = self._path() + '/config'
+
+        if svc_config:
+            data = types.config_to_api_list(svc_config)
+        else:
+            data = {}
+        if rt_configs:
+            rt_list = []
+            for rt, cfg in six.iteritems(rt_configs):
+                rt_data = types.config_to_api_list(cfg)
+                rt_data['roleType'] = rt
+                rt_list.append(rt_data)
+            data[ROLETYPES_CFG_KEY] = rt_list
+
+        resp = self._get_resource_root().put(path, data=json.dumps(data))
+        return self._parse_svc_config(resp)
+
+    def create_role(self, role_name, role_type, host_id):
+        """Create a role
+
+        :param role_name: Role name
+        :param role_type: Role type
+        :param host_id: ID of the host to assign the role to
+        :return: An ApiRole object
+        """
+        return roles.create_role(self._get_resource_root(), self.name,
+                                 role_type, role_name, host_id,
+                                 self._get_cluster_name())
+
+    def delete_role(self, name):
+        """Delete a role by name
+
+        :param name: Role name
+        :return: The deleted ApiRole object
+        """
+        return roles.delete_role(self._get_resource_root(), self.name, name,
+                                 self._get_cluster_name())
+
+    def get_roles_by_type(self, role_type, view=None):
+        """Get all roles of a certain type in a service
+
+        :param role_type: Role type
+        :param view: View to materialize ('full' or 'summary')
+        :return: A list of ApiRole objects.
+        """
+        return roles.get_roles_by_type(self._get_resource_root(), self.name,
+                                       role_type, self._get_cluster_name(),
+                                       view)
+
+    def get_all_role_config_groups(self):
+        """Get a list of role configuration groups in the service
+
+        :return: A list of ApiRoleConfigGroup objects.
+        :since: API v3
+        """
+        return role_config_groups.get_all_role_config_groups(
+            self._get_resource_root(), self.name, self._get_cluster_name())
+
+    def start(self):
+        """Start a service
+
+        :return: Reference to the submitted command.
+        """
+        return self._cmd('start')
+
+    def stop(self):
+        """Stop a service
+
+        :return: Reference to the submitted command.
+        """
+        return self._cmd('stop')
+
+    def restart(self):
+        """Restart a service
+
+        :return: Reference to the submitted command.
+        """
+        return self._cmd('restart')
+
+    def start_roles(self, *role_names):
+        """Start a list of roles
+
+        :param role_names: names of the roles to start.
+        :return: List of submitted commands.
+        """
+        return self._role_cmd('start', role_names)
+
+    def create_hbase_root(self):
+        """Create the root directory of an HBase service
+
+        :return: Reference to the submitted command.
+        """
+        return self._cmd('hbaseCreateRoot')
+
+    def create_hdfs_tmp(self):
+        """Create /tmp directory in HDFS
+
+        Create the /tmp directory in HDFS with appropriate ownership and
+        permissions.
+
+        :return: Reference to the submitted command
+        :since: API v2
+        """
+        return self._cmd('hdfsCreateTmpDir')
+
+    def refresh(self, *role_names):
+        """Execute the "refresh" command on a set of roles
+
+        :param role_names: Names of the roles to refresh.
+        :return: Reference to the submitted command.
+        """
+        return self._role_cmd('refresh', role_names)
+
+    def decommission(self, *role_names):
+        """Decommission roles in a service
+
+        :param role_names: Names of the roles to decommission.
+        :return: Reference to the submitted command.
+        """
+        return self._cmd('decommission', data=role_names)
+
+    def deploy_client_config(self, *role_names):
+        """Deploys client configuration to the hosts where roles are running
+
+        :param role_names: Names of the roles to decommission.
+        :return: Reference to the submitted command.
+        """
+        return self._cmd('deployClientConfig', data=role_names)
+
+    def format_hdfs(self, *namenodes):
+        """Format NameNode instances of an HDFS service
+
+        :param namenodes: Name of NameNode instances to format.
+        :return: List of submitted commands.
+        """
+        return self._role_cmd('hdfsFormat', namenodes)
+
+    def install_oozie_sharelib(self):
+        """Installs the Oozie ShareLib
+
+        Oozie must be stopped before running this command.
+
+        :return: Reference to the submitted command.
+        :since: API v3
+        """
+        return self._cmd('installOozieShareLib', api_version=3)
+
+    def create_oozie_db(self):
+        """Creates the Oozie Database Schema in the configured database
+
+        :return: Reference to the submitted command.
+        :since: API v2
+        """
+        return self._cmd('createOozieDb', api_version=2)
+
+    def upgrade_oozie_db(self):
+        """Upgrade Oozie Database schema as part of a major version upgrade
+
+        :return: Reference to the submitted command.
+        :since: API v6
+        """
+        return self._cmd('oozieUpgradeDb', api_version=6)
+
+    def create_hive_metastore_tables(self):
+        """Creates the Hive metastore tables in the configured database
+
+        Will do nothing if tables already exist. Will not perform an upgrade.
+
+        :return: Reference to the submitted command.
+        :since: API v3
+        """
+        return self._cmd('hiveCreateMetastoreDatabaseTables', api_version=3)
+
+    def create_hive_warehouse(self):
+        """Creates the Hive warehouse directory in HDFS
+
+        :return: Reference to the submitted command.
+        :since: API v3
+        """
+        return self._cmd('hiveCreateHiveWarehouse')
+
+    def create_hive_userdir(self):
+        """Creates the Hive user directory in HDFS
+
+        :return: Reference to the submitted command.
+        :since: API v4
+        """
+        return self._cmd('hiveCreateHiveUserDir')
+
+
+class ApiServiceSetupInfo(ApiService):
+    _ATTRIBUTES = {
+        'name': None,
+        'type': None,
+        'config': types.Attr(types.ApiConfig),
+        'roles': types.Attr(roles.ApiRole),
+    }
+
+    def __init__(self, name=None, type=None,
+                 config=None, roles=None):
+        # The BaseApiObject expects a resource_root, which we don't care about
+        resource_root = None
+        # Unfortunately, the json key is called "type". So our input arg
+        # needs to be called "type" as well, despite it being a python keyword.
+        types.BaseApiObject.init(self, None, locals())
+
+    def set_config(self, config):
+        """Set the service configuration
+
+        :param config: A dictionary of config key/value
+        """
+        if self.config is None:
+            self.config = {}
+        self.config.update(types.config_to_api_list(config))
+
+    def add_role_info(self, role_name, role_type, host_id, config=None):
+        """Add a role info
+
+        The role will be created along with the service setup.
+
+        :param role_name: Role name
+        :param role_type: Role type
+        :param host_id: The host where the role should run
+        :param config: (Optional) A dictionary of role config values
+        """
+        if self.roles is None:
+            self.roles = []
+        api_config_list = (config is not None
+                           and types.config_to_api_list(config)
+                           or None)
+        self.roles.append({
+            'name': role_name,
+            'type': role_type,
+            'hostRef': {'hostId': host_id},
+            'config': api_config_list})

sahara/plugins/cdh/client/types.py

@@ -0,0 +1,680 @@
+# Copyright (c) 2014 Intel Corporation.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# The contents of this file are mainly copied from cm_api sources,
+# released by Cloudrea. Codes not used by Sahara CDH plugin are removed.
+# You can find the original codes at
+#
+#     https://github.com/cloudera/cm_api/tree/master/python/src/cm_api
+#
+# To satisfy the pep8 and python3 tests, we did some changes to the codes.
+# We also change some importings to use Sahara inherited classes.
+
+import copy
+import datetime
+import json
+import time
+
+import six
+
+from sahara import context
+from sahara.i18n import _
+from sahara.plugins.cdh import exceptions as ex
+
+
+class Attr(object):
+    """Base Attribute
+
+    Encapsulates information about an attribute in the JSON encoding of the
+    object. It identifies properties of the attribute such as whether it's
+    read-only, its type, etc.
+    """
+    DATE_FMT = "%Y-%m-%dT%H:%M:%S.%fZ"
+
+    def __init__(self, atype=None, rw=True, is_api_list=False):
+        self._atype = atype
+        self._is_api_list = is_api_list
+        self.rw = rw
+
+    def to_json(self, value, preserve_ro):
+        """Returns the JSON encoding of the given attribute value
+
+        If the value has a 'to_json_dict' object, that method is called.
+        Otherwise, the following values are returned for each input type:
+         - datetime.datetime: string with the API representation of a date.
+         - dictionary: if 'atype' is ApiConfig, a list of ApiConfig objects.
+         - python list: python list (or ApiList) with JSON encoding of items
+         - the raw value otherwise
+        """
+        if hasattr(value, 'to_json_dict'):
+            return value.to_json_dict(preserve_ro)
+        elif isinstance(value, dict) and self._atype == ApiConfig:
+            return config_to_api_list(value)
+        elif isinstance(value, datetime.datetime):
+            return value.strftime(self.DATE_FMT)
+        elif isinstance(value, list) or isinstance(value, tuple):
+            if self._is_api_list:
+                return ApiList(value).to_json_dict()
+            else:
+                return [self.to_json(x, preserve_ro) for x in value]
+        else:
+            return value
+
+    def from_json(self, resource_root, data):
+        """Parses the given JSON value into an appropriate python object
+
+        This means:
+         - a datetime.datetime if 'atype' is datetime.datetime
+         - a converted config dictionary or config list if 'atype' is ApiConfig
+         - if the attr is an API list, an ApiList with instances of 'atype'
+         - an instance of 'atype' if it has a 'from_json_dict' method
+         - a python list with decoded versions of the member objects if the
+           input is a python list.
+         - the raw value otherwise
+        """
+        if data is None:
+            return None
+
+        if self._atype == datetime.datetime:
+            return datetime.datetime.strptime(data, self.DATE_FMT)
+        elif self._atype == ApiConfig:
+            # ApiConfig is special. We want a python dictionary for summary
+            # views, but an ApiList for full views. Try to detect each case
+            # from the JSON data.
+            if not data['items']:
+                return {}
+            first = data['items'][0]
+            return json_to_config(data, len(first) == 2)
+        elif self._is_api_list:
+            return ApiList.from_json_dict(data, resource_root, self._atype)
+        elif isinstance(data, list):
+            return [self.from_json(resource_root, x) for x in data]
+        elif hasattr(self._atype, 'from_json_dict'):
+            return self._atype.from_json_dict(data, resource_root)
+        else:
+            return data
+
+
+class ROAttr(Attr):
+    """Subclass that just defines the attribute as read-only."""
+    def __init__(self, atype=None, is_api_list=False):
+        Attr.__init__(self, atype=atype, rw=False, is_api_list=is_api_list)
+
+
+def check_api_version(resource_root, min_version):
+    """Check API version
+
+    Checks if the resource_root's API version it at least the given minimum
+    version.
+    """
+    if resource_root.version < min_version:
+        raise ex.CMApiVersionError(
+            _("API version %(minv)s is required but %(acv)s is in use.")
+            % {'minv': min_version, 'acv': resource_root.version})
+
+
+def call(method, path, ret_type,
+         ret_is_list=False, data=None, params=None, api_version=1):
+    """Call a resource method
+
+    Generic function for calling a resource method and automatically dealing
+    with serialization of parameters and deserialization of return values.
+
+    :param method: method to call (must be bound to a resource;
+                                 e.g., "resource_root.get").
+    :param path: the full path of the API method to call.
+    :param ret_type: return type of the call.
+    :param ret_is_list: whether the return type is an ApiList.
+    :param data: Optional data to send as payload to the call.
+    :param params: Optional query parameters for the call.
+    :param api_version: minimum API version for the call.
+    """
+    check_api_version(method.im_self, api_version)
+    if data is not None:
+        data = json.dumps(Attr(is_api_list=True).to_json(data, False))
+        ret = method(path, data=data, params=params)
+    else:
+        ret = method(path, params=params)
+    if ret_type is None:
+        return
+    elif ret_is_list:
+        return ApiList.from_json_dict(ret, method.im_self, ret_type)
+    elif isinstance(ret, list):
+        return [ret_type.from_json_dict(x, method.im_self) for x in ret]
+    else:
+        return ret_type.from_json_dict(ret, method.im_self)
+
+
+class BaseApiObject(object):
+    """The BaseApiObject helps with (de)serialization from/to JSON
+
+    The derived class has two ways of defining custom attributes:
+     - Overwriting the '_ATTRIBUTES' field with the attribute dictionary
+     - Override the _get_attributes() method, in case static initialization of
+       the above field is not possible.
+
+    It's recommended that the _get_attributes() implementation do caching to
+    avoid computing the dictionary on every invocation.
+
+    The derived class's constructor must call the base class's init() static
+    method. All constructor arguments (aside from self and resource_root) must
+    be keywords arguments with default values (typically None), or
+    from_json_dict() will not work.
+    """
+
+    _ATTRIBUTES = {}
+    _WHITELIST = ('_resource_root', '_attributes')
+
+    @classmethod
+    def _get_attributes(cls):
+        """Get an attribute dictionary
+
+        Returns a map of property names to attr instances (or None for default
+        attribute behavior) describing the properties of the object.
+
+        By default, this method will return the class's _ATTRIBUTES field.
+        Classes can override this method to do custom initialization of the
+        attributes when needed.
+        """
+        return cls._ATTRIBUTES
+
+    @staticmethod
+    def init(obj, resource_root, attrs=None):
+        """Wraper of real constructor
+
+        Wraper around the real constructor to avoid issues with the 'self'
+        argument. Call like this, from a subclass's constructor:
+
+         - BaseApiObject.init(self, locals())
+        """
+        # This works around http://bugs.python.org/issue2646
+        # We use unicode strings as keys in kwargs.
+        str_attrs = {}
+        if attrs:
+            for k, v in six.iteritems(attrs):
+                if k not in ('self', 'resource_root'):
+                    str_attrs[k] = v
+        BaseApiObject.__init__(obj, resource_root, **str_attrs)
+
+    def __init__(self, resource_root, **attrs):
+        """Init method
+
+        Initializes internal state and sets all known writable properties of
+        the object to None. Then initializes the properties given in the
+        provided attributes dictionary.
+
+        :param resource_root: API resource object.
+        :param attrs: optional dictionary of attributes to set. This should
+                      only contain r/w attributes.
+        """
+        self._resource_root = resource_root
+
+        for name, attr in six.iteritems(self._get_attributes()):
+            object.__setattr__(self, name, None)
+        if attrs:
+            self._set_attrs(attrs, from_json=False)
+
+    def _set_attrs(self, attrs, allow_ro=False, from_json=True):
+        """Set attributes from dictionary
+
+        Sets all the attributes in the dictionary. Optionally, allows setting
+        read-only attributes (e.g. when deserializing from JSON) and skipping
+        JSON deserialization of values.
+        """
+        for k, v in six.iteritems(attrs):
+            attr = self._check_attr(k, allow_ro)
+            if attr and from_json:
+                v = attr.from_json(self._get_resource_root(), v)
+            object.__setattr__(self, k, v)
+
+    def __setattr__(self, name, val):
+        if name not in BaseApiObject._WHITELIST:
+            self._check_attr(name, False)
+        object.__setattr__(self, name, val)
+
+    def _check_attr(self, name, allow_ro):
+        if name not in self._get_attributes():
+            raise ex.CMApiAttributeError(
+                _('Invalid property %(attname)s for class %(classname)s.')
+                % {'attname': name, 'classname': self.__class__.__name__})
+        attr = self._get_attributes()[name]
+        if not allow_ro and attr and not attr.rw:
+            raise ex.CMApiAttributeError(
+                _('Attribute %(attname)s of class %(classname)s '
+                  'is read only.')
+                % {'attname': name, 'classname': self.__class__.__name__})
+        return attr
+
+    def _get_resource_root(self):
+        return self._resource_root
+
+    def _update(self, api_obj):
+        """Copy state from api_obj to this object."""
+        if not isinstance(self, api_obj.__class__):
+            raise ex.CMApiValueError(
+                _("Class %(class1)s does not derive from %(class2)s; "
+                    "cannot update attributes.")
+                % {'class1': self.__class__, 'class2': api_obj.__class__})
+
+        for name in self._get_attributes().keys():
+            try:
+                val = getattr(api_obj, name)
+                setattr(self, name, val)
+            except AttributeError:
+                pass
+
+    def to_json_dict(self, preserve_ro=False):
+        dic = {}
+        for name, attr in six.iteritems(self._get_attributes()):
+            if not preserve_ro and attr and not attr.rw:
+                continue
+            try:
+                value = getattr(self, name)
+                if value is not None:
+                    if attr:
+                        dic[name] = attr.to_json(value, preserve_ro)
+                    else:
+                        dic[name] = value
+            except AttributeError:
+                pass
+        return dic
+
+    def __str__(self):
+        """Give a printable format of an attribute
+
+        Default implementation of __str__. Uses the type name and the first
+        attribute retrieved from the attribute map to create the string.
+        """
+        name = self._get_attributes().keys()[0]
+        value = getattr(self, name, None)
+        return "<%s>: %s = %s" % (self.__class__.__name__, name, value)
+
+    @classmethod
+    def from_json_dict(cls, dic, resource_root):
+        obj = cls(resource_root)
+        obj._set_attrs(dic, allow_ro=True)
+        return obj
+
+
+class BaseApiResource(BaseApiObject):
+    """Base ApiResource
+
+    A specialization of BaseApiObject that provides some utility methods for
+    resources. This class allows easier serialization / deserialization of
+    parameters and return values.
+    """
+
+    def _api_version(self):
+        """Get API version
+
+        Returns the minimum API version for this resource. Defaults to 1.
+        """
+        return 1
+
+    def _path(self):
+        """Get resource path
+
+        Returns the path to the resource.
+
+        e.g., for a service 'foo' in cluster 'bar', this should return
+        '/clusters/bar/services/foo'.
+        """
+        raise NotImplementedError
+
+    def _require_min_api_version(self, version):
+        """Check mininum verson requirement
+
+        Raise an exception if the version of the api is less than the given
+        version.
+
+        :param version: The minimum required version.
+        """
+        actual_version = self._get_resource_root().version
+        version = max(version, self._api_version())
+        if actual_version < version:
+            raise ex.CMApiVersionError(
+                _("API version %(minv)s is required but %(acv)s is in use.")
+                % {'minv': version, 'acv': actual_version})
+
+    def _cmd(self, command, data=None, params=None, api_version=1):
+        """Invoke a command on the resource
+
+        Invokes a command on the resource. Commands are expected to be under
+        the "commands/" sub-resource.
+        """
+        return self._post("commands/" + command, ApiCommand,
+                          data=data, params=params, api_version=api_version)
+
+    def _get_config(self, rel_path, view, api_version=1):
+        """Get resource configurations
+
+        Retrieves an ApiConfig list from the given relative path.
+        """
+        self._require_min_api_version(api_version)
+        params = dict(view=view) if view else None
+        resp = self._get_resource_root().get(self._path() + '/' + rel_path,
+                                             params=params)
+        return json_to_config(resp, view == 'full')
+
+    def _update_config(self, rel_path, config, api_version=1):
+        self._require_min_api_version(api_version)
+        resp = self._get_resource_root().put(self._path() + '/' + rel_path,
+                                             data=config_to_json(config))
+        return json_to_config(resp, False)
+
+    def _delete(self, rel_path, ret_type, ret_is_list=False, params=None,
+                api_version=1):
+        return self._call('delete', rel_path, ret_type, ret_is_list, None,
+                          params, api_version)
+
+    def _get(self, rel_path, ret_type, ret_is_list=False, params=None,
+             api_version=1):
+        return self._call('get', rel_path, ret_type, ret_is_list, None,
+                          params, api_version)
+
+    def _post(self, rel_path, ret_type, ret_is_list=False, data=None,
+              params=None, api_version=1):
+        return self._call('post', rel_path, ret_type, ret_is_list, data,
+                          params, api_version)
+
+    def _put(self, rel_path, ret_type, ret_is_list=False, data=None,
+             params=None, api_version=1):
+        return self._call('put', rel_path, ret_type, ret_is_list, data,
+                          params, api_version)
+
+    def _call(self, method, rel_path, ret_type, ret_is_list=False, data=None,
+              params=None, api_version=1):
+        path = self._path()
+        if rel_path:
+            path += '/' + rel_path
+        return call(getattr(self._get_resource_root(), method),
+                    path,
+                    ret_type,
+                    ret_is_list,
+                    data,
+                    params,
+                    api_version)
+
+
+class ApiList(BaseApiObject):
+    """A list of some api object"""
+    LIST_KEY = "items"
+
+    def __init__(self, objects, resource_root=None, **attrs):
+        BaseApiObject.__init__(self, resource_root, **attrs)
+        # Bypass checks in BaseApiObject.__setattr__
+        object.__setattr__(self, 'objects', objects)
+
+    def __str__(self):
+        return ("<ApiList>(%d): [%s]" % (len(self.objects),
+                ", ".join([str(item) for item in self.objects])))
+
+    def to_json_dict(self, preserve_ro=False):
+        ret = BaseApiObject.to_json_dict(self, preserve_ro)
+        attr = Attr()
+        ret[ApiList.LIST_KEY] = [attr.to_json(x, preserve_ro)
+                                 for x in self.objects]
+        return ret
+
+    def __len__(self):
+        return self.objects.__len__()
+
+    def __iter__(self):
+        return self.objects.__iter__()
+
+    def __getitem__(self, i):
+        return self.objects.__getitem__(i)
+
+    def __getslice(self, i, j):
+        return self.objects.__getslice__(i, j)
+
+    @classmethod
+    def from_json_dict(cls, dic, resource_root, member_cls=None):
+        if not member_cls:
+            member_cls = cls._MEMBER_CLASS
+        attr = Attr(atype=member_cls)
+        items = []
+        if ApiList.LIST_KEY in dic:
+            items = [attr.from_json(resource_root, x)
+                     for x in dic[ApiList.LIST_KEY]]
+        ret = cls(items)
+        # If the class declares custom attributes, populate them based on the
+        # input dict. The check avoids extra overhead for the common case,
+        # where we just have a plain list. _set_attrs() also does not
+        # understand the "items" attribute, so it can't be in the input data.
+        if cls._ATTRIBUTES:
+            if ApiList.LIST_KEY in dic:
+                dic = copy.copy(dic)
+                del dic[ApiList.LIST_KEY]
+            ret._set_attrs(dic, allow_ro=True)
+        return ret
+
+
+class ApiHostRef(BaseApiObject):
+    _ATTRIBUTES = {
+        'hostId': None,
+    }
+
+    def __init__(self, resource_root, hostId=None):
+        BaseApiObject.init(self, resource_root, locals())
+
+    def __str__(self):
+        return "<ApiHostRef>: %s" % (self.hostId)
+
+
+class ApiServiceRef(BaseApiObject):
+    _ATTRIBUTES = {
+        'clusterName': None,
+        'serviceName': None,
+        'peerName': None,
+    }
+
+    def __init__(self, resource_root, serviceName=None, clusterName=None,
+                 peerName=None):
+        BaseApiObject.init(self, resource_root, locals())
+
+
+class ApiClusterRef(BaseApiObject):
+    _ATTRIBUTES = {
+        'clusterName': None,
+    }
+
+    def __init__(self, resource_root, clusterName=None):
+        BaseApiObject.init(self, resource_root, locals())
+
+
+class ApiRoleRef(BaseApiObject):
+    _ATTRIBUTES = {
+        'clusterName': None,
+        'serviceName': None,
+        'roleName': None,
+    }
+
+    def __init__(self, resource_root, serviceName=None, roleName=None,
+                 clusterName=None):
+        BaseApiObject.init(self, resource_root, locals())
+
+
+class ApiRoleConfigGroupRef(BaseApiObject):
+    _ATTRIBUTES = {
+        'roleConfigGroupName': None,
+    }
+
+    def __init__(self, resource_root, roleConfigGroupName=None):
+        BaseApiObject.init(self, resource_root, locals())
+
+
+class ApiCommand(BaseApiObject):
+    SYNCHRONOUS_COMMAND_ID = -1
+
+    @classmethod
+    def _get_attributes(cls):
+        if not ('_ATTRIBUTES' in cls.__dict__):
+            cls._ATTRIBUTES = {
+                'id': ROAttr(),
+                'name': ROAttr(),
+                'startTime': ROAttr(datetime.datetime),
+                'endTime': ROAttr(datetime.datetime),
+                'active': ROAttr(),
+                'success': ROAttr(),
+                'resultMessage': ROAttr(),
+                'clusterRef': ROAttr(ApiClusterRef),
+                'serviceRef': ROAttr(ApiServiceRef),
+                'roleRef': ROAttr(ApiRoleRef),
+                'hostRef': ROAttr(ApiHostRef),
+                'children': ROAttr(ApiCommand, is_api_list=True),
+                'parent': ROAttr(ApiCommand),
+                'resultDataUrl': ROAttr(),
+            }
+        return cls._ATTRIBUTES
+
+    def __str__(self):
+        return ("<ApiCommand>: '%s' (id: %s; active: %s; success: %s)"
+                % (self.name, self.id, self.active, self.success))
+
+    def _path(self):
+        return '/commands/%d' % self.id
+
+    def fetch(self):
+        """Retrieve updated data about the command from the server
+
+        :return: A new ApiCommand object.
+        """
+        if self.id == ApiCommand.SYNCHRONOUS_COMMAND_ID:
+            return self
+
+        resp = self._get_resource_root().get(self._path())
+        return ApiCommand.from_json_dict(resp, self._get_resource_root())
+
+    def wait(self, timeout=None):
+        """Wait for command to finish
+
+        :param timeout: (Optional) Max amount of time (in seconds) to wait.
+                        Wait forever by default.
+        :return: The final ApiCommand object, containing the last known state.
+                 The command may still be running in case of timeout.
+        """
+        if self.id == ApiCommand.SYNCHRONOUS_COMMAND_ID:
+            return self
+
+        SLEEP_SEC = 5
+
+        if timeout is None:
+            deadline = None
+        else:
+            deadline = time.time() + timeout
+
+        while True:
+            cmd = self.fetch()
+            if not cmd.active:
+                return cmd
+
+            if deadline is not None:
+                now = time.time()
+                if deadline < now:
+                    return cmd
+                else:
+                    context.sleep(min(SLEEP_SEC, deadline - now))
+            else:
+                context.sleep(SLEEP_SEC)
+
+    def abort(self):
+        """Abort a running command
+
+        :return: A new ApiCommand object with the updated information.
+        """
+        if self.id == ApiCommand.SYNCHRONOUS_COMMAND_ID:
+            return self
+
+        path = self._path() + '/abort'
+        resp = self._get_resource_root().post(path)
+        return ApiCommand.from_json_dict(resp, self._get_resource_root())
+
+
+class ApiBulkCommandList(ApiList):
+    _ATTRIBUTES = {
+        'errors': ROAttr(),
+    }
+    _MEMBER_CLASS = ApiCommand
+
+
+#
+# Configuration helpers.
+#
+class ApiConfig(BaseApiObject):
+    _ATTRIBUTES = {
+        'name': None,
+        'value': None,
+        'required': ROAttr(),
+        'default': ROAttr(),
+        'displayName': ROAttr(),
+        'description': ROAttr(),
+        'relatedName': ROAttr(),
+        'validationState': ROAttr(),
+        'validationMessage': ROAttr(),
+    }
+
+    def __init__(self, resource_root, name=None, value=None):
+        BaseApiObject.init(self, resource_root, locals())
+
+    def __str__(self):
+        return "<ApiConfig>: %s = %s" % (self.name, self.value)
+
+
+def config_to_api_list(dic):
+    """Convert a python dictionary into an ApiConfig list
+
+    Converts a python dictionary into a list containing the proper
+    ApiConfig encoding for configuration data.
+
+    :param dic: Key-value pairs to convert.
+    :return: JSON dictionary of an ApiConfig list (*not* an ApiList).
+    """
+    config = []
+    for k, v in six.iteritems(dic):
+        config.append({'name': k, 'value': v})
+    return {ApiList.LIST_KEY: config}
+
+
+def config_to_json(dic):
+    """Converts a python dictionary into a JSON payload
+
+    The payload matches the expected "apiConfig list" type used to update
+    configuration parameters using the API.
+
+    :param dic: Key-value pairs to convert.
+    :return: String with the JSON-encoded data.
+    """
+    return json.dumps(config_to_api_list(dic))
+
+
+def json_to_config(dic, full=False):
+    """Converts a JSON-decoded config dictionary to a python dictionary
+
+    When materializing the full view, the values in the dictionary will be
+    instances of ApiConfig, instead of strings.
+
+    :param dic: JSON-decoded config dictionary.
+    :param full: Whether to materialize the full view of the config data.
+    :return: Python dictionary with config data.
+    """
+    config = {}
+    for entry in dic['items']:
+        k = entry['name']
+        if full:
+            config[k] = ApiConfig.from_json_dict(entry, None)
+        else:
+            config[k] = entry.get('value')
+    return config

sahara/plugins/cdh/cloudera_utils.py

@@ -15,20 +15,13 @@
 
 import functools
 
-# cm_api client is not present in OS requirements
-try:
-    from cm_api import api_client
-    from cm_api.endpoints import services
-except ImportError:
-    api_client = None
-    services = None
-
 from oslo_log import log as logging
 from oslo_utils import timeutils
 
 from sahara import context
 from sahara.i18n import _
-from sahara.i18n import _LE
+from sahara.plugins.cdh.client import api_client
+from sahara.plugins.cdh.client import services
 from sahara.plugins import exceptions as ex
 from sahara.utils import cluster_progress_ops as cpo
 
@@ -69,15 +62,6 @@ class ClouderaUtils(object):
         # pu will be defined in derived class.
         self.pu = None
 
-    def have_cm_api_libs(self):
-        return api_client and services
-
-    def validate_cm_api_libs(self):
-        if not self.have_cm_api_libs():
-            LOG.error(_LE("For provisioning cluster with CDH plugin install"
-                          " 'cm_api' package version 6.0.2 or later."))
-            raise ex.HadoopProvisionError(_("'cm_api' is not installed."))
-
     def get_api_client(self, cluster):
         manager_ip = self.pu.get_manager(cluster).management_ip
         return api_client.ApiResource(manager_ip,

sahara/plugins/cdh/exceptions.py

@@ -0,0 +1,78 @@
+# Copyright (c) 2015 Intel Corporation.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from sahara import exceptions as e
+from sahara.i18n import _
+
+
+class CMApiVersionError(e.SaharaException):
+    """Exception indicating that CM API Version does not meet requirement.
+
+    A message indicating the reason for failure must be provided.
+    """
+
+    base_message = _("CM API version not meet requirement: %s")
+
+    def __init__(self, message):
+        self.code = "CM_API_VERSION_ERROR"
+        self.message = self.base_message % message
+
+        super(CMApiVersionError, self).__init__()
+
+
+class CMApiException(e.SaharaException):
+    """Exception Type from CM API Errors.
+
+    Any error result from the CM API is converted into this exception type.
+    This handles errors from the HTTP level as well as the API level.
+    """
+
+    base_message = _("CM API error: %s")
+
+    def __init__(self, message):
+        self.code = "CM_API_EXCEPTION"
+        self.message = self.base_message % message
+
+        super(CMApiException, self).__init__()
+
+
+class CMApiAttributeError(e.SaharaException):
+    """Exception indicating a CM API attribute error.
+
+    A message indicating the reason for failure must be provided.
+    """
+
+    base_message = _("CM API attribute error: %s")
+
+    def __init__(self, message):
+        self.code = "CM_API_ATTRIBUTE_ERROR"
+        self.message = self.base_message % message
+
+        super(CMApiAttributeError, self).__init__()
+
+
+class CMApiValueError(e.SaharaException):
+    """Exception indicating a CM API value error.
+
+    A message indicating the reason for failure must be provided.
+    """
+
+    base_message = _("CM API value error: %s")
+
+    def __init__(self, message):
+        self.code = "CM_API_VALUE_ERROR"
+        self.message = self.base_message % message
+
+        super(CMApiValueError, self).__init__()

sahara/plugins/cdh/v5/cloudera_utils.py

@@ -13,14 +13,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-# cm_api client is not present in OS requirements
-try:
-    from cm_api import api_client
-    from cm_api.endpoints import services
-except ImportError:
-    api_client = None
-    services = None
-
 import six
 
 from sahara.i18n import _

sahara/plugins/cdh/v5/resources/cdh_config.py

@@ -15,7 +15,7 @@
 
 import json
 
-from cm_api import api_client
+from sahara.plugins.cdh.client import api_client
 
 
 # -- cm config --

sahara/plugins/cdh/v5/validation.py

@@ -13,15 +13,12 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from oslo_log import log as logging
-
 from sahara.i18n import _
 from sahara.plugins.cdh.v5 import plugin_utils as pu
 from sahara.plugins import exceptions as ex
 from sahara.plugins import utils as u
 from sahara.utils import general as gu
 
-LOG = logging.getLogger(__name__)
 PU = pu.PluginUtilsV5()
 
 

sahara/plugins/cdh/v5/versionhandler.py

@@ -13,9 +13,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from oslo_config import cfg
-from oslo_log import log as logging
-
 from sahara import conductor
 from sahara import context
 from sahara.plugins.cdh import abstractversionhandler as avm
@@ -27,9 +24,6 @@ from sahara.plugins.cdh.v5 import validation as vl
 
 
 conductor = conductor.API
-LOG = logging.getLogger(__name__)
-CONF = cfg.CONF
-
 CU = cu.ClouderaUtilsV5()
 
 
@@ -63,7 +57,6 @@ class VersionHandler(avm.AbstractVersionHandler):
         }
 
     def validate(self, cluster):
-        CU.validate_cm_api_libs()
         vl.validate_cluster_creating(cluster)
 
     def configure_cluster(self, cluster):

sahara/plugins/cdh/v5_3_0/cloudera_utils.py

@@ -13,14 +13,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-# cm_api client is not present in OS requirements
-try:
-    from cm_api import api_client
-    from cm_api.endpoints import services
-except ImportError:
-    api_client = None
-    services = None
-
 import six
 
 from sahara.i18n import _
@@ -79,13 +71,6 @@ class ClouderaUtilsV530(cu.ClouderaUtils):
         cu.ClouderaUtils.__init__(self)
         self.pu = pu.PluginUtilsV530()
 
-    def get_api_client(self, cluster):
-        manager_ip = self.pu.get_manager(cluster).management_ip
-        return api_client.ApiResource(manager_ip,
-                                      username=self.CM_DEFAULT_USERNAME,
-                                      password=self.CM_DEFAULT_PASSWD,
-                                      version=self.CM_API_VERSION)
-
     def get_service_by_role(self, process, cluster=None, instance=None):
         cm_cluster = None
         if cluster:

sahara/plugins/cdh/v5_3_0/resources/cdh_config.py

@@ -15,8 +15,7 @@
 
 import json
 
-from cm_api import api_client
-
+from sahara.plugins.cdh.client import api_client
 
 # -- cm config --
 

sahara/plugins/cdh/v5_3_0/validation.py

@@ -13,15 +13,12 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from oslo_log import log as logging
-
 from sahara.i18n import _
 from sahara.plugins.cdh.v5_3_0 import plugin_utils as pu
 from sahara.plugins import exceptions as ex
 from sahara.plugins import utils as u
 from sahara.utils import general as gu
 
-LOG = logging.getLogger(__name__)
 PU = pu.PluginUtilsV530()
 
 

sahara/plugins/cdh/v5_3_0/versionhandler.py

@@ -13,9 +13,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from oslo_config import cfg
-from oslo_log import log as logging
-
 from sahara import conductor
 from sahara import context
 from sahara.plugins.cdh import abstractversionhandler as avm
@@ -27,8 +24,6 @@ from sahara.plugins.cdh.v5_3_0 import validation as vl
 
 
 conductor = conductor.API
-LOG = logging.getLogger(__name__)
-CONF = cfg.CONF
 CU = cu.ClouderaUtilsV530()
 
 
@@ -71,7 +66,6 @@ class VersionHandler(avm.AbstractVersionHandler):
         }
 
     def validate(self, cluster):
-        CU.validate_cm_api_libs()
         vl.validate_cluster_creating(cluster)
 
     def configure_cluster(self, cluster):