refactor congress inspector

JIRA: DOCTOR-98

Change-Id: I22fa893a1c1973fc63f994b630dd0c6a2c30e641
Signed-off-by: dongwenjuan <dong.wenjuan@zte.com.cn>

1 files changed, 94 insertions, 0 deletions

diff --git a/tests/inspector/congress.py b/tests/inspector/congress.py
new file mode 100644
index 00000000..ae295852
--- /dev/null
+++ b/tests/inspector/congress.py
@@ -0,0 +1,94 @@
+##############################################################################
+# Copyright (c) 2017 ZTE Corporation and others.
+#
+# All rights reserved. This program and the accompanying materials
+# are made available under the terms of the Apache License, Version 2.0
+# which accompanies this distribution, and is available at
+# http://www.apache.org/licenses/LICENSE-2.0
+##############################################################################
+from identity_auth import get_identity_auth
+from identity_auth import get_session
+from os_clients import congress_client
+
+from inspector.base import BaseInspector
+
+
+class CongressInspector(BaseInspector):
+    nova_api_min_version = '2.11'
+    doctor_driver = 'doctor'
+    doctor_datasource = 'doctor'
+    policy = 'classification'
+    rules = {
+        'host_down':
+            'host_down(host) :- doctor:events(hostname=host, type="compute.host.down", status="down")',
+        'active_instance_in_host':
+            'active_instance_in_host(vmid, host) :- nova:servers(id=vmid, host_name=host, status="ACTIVE")',
+        'host_force_down':
+            'execute[nova:services.force_down(host, "nova-compute", "True")] :- host_down(host)',
+        'error_vm_states':
+            'execute[nova:servers.reset_state(vmid, "error")] :- host_down(host), active_instance_in_host(vmid, host)'
+    }
+
+    def __init__(self, conf, log):
+        super(CongressInspector, self).__init__(conf, log)
+        self.auth = get_identity_auth()
+        self.congress = congress_client(get_session(auth=self.auth))
+        self._init_driver_and_ds()
+        self.inspector_url = self.get_inspector_url()
+
+    def _init_driver_and_ds(self):
+        datasources = \
+            {ds['name']: ds for ds in self.congress.list_datasources()['results']}
+
+        # check nova_api version
+        nova_api_version = datasources['nova']['config'].get('api_version')
+        if nova_api_version and nova_api_version < self.nova_api_min_version:
+            raise Exception('Congress Nova datasource API version < nova_api_min_version(%s)'
+                            % self.nova_api_min_version)
+
+        # create doctor datasource if it's not exist
+        if self.doctor_datasource not in datasources:
+            self.congress.create_datasource(
+                body={'driver': self.doctor_driver,
+                      'name': self.doctor_datasource})
+
+        # check whether doctor driver exist
+        drivers = \
+            {driver['id']: driver for driver in self.congress.list_drivers()['results']}
+        if self.doctor_driver not in drivers:
+            raise Exception('Do not support doctor driver in congress')
+
+        self.policy_rules = \
+            {rule['name']: rule for rule in
+             self.congress.list_policy_rules(self.policy)['results']}
+
+    def get_inspector_url(self):
+        ds = self.congress.list_datasources()['results']
+        doctor_ds = next((item for item in ds if item['driver'] == 'doctor'),
+                         None)
+        congress_endpoint = self.congress.httpclient.get_endpoint(auth=self.auth)
+        return ('%s/v1/data-sources/%s/tables/events/rows' %
+                (congress_endpoint, doctor_ds['id']))
+
+    def start(self):
+        self.log.info('congress inspector start......')
+
+        for rule_name, rule in self.rules.items():
+            self._add_rule(rule_name, rule)
+
+    def stop(self):
+        self.log.info('congress inspector stop......')
+
+        for rule_name in self.rules.keys():
+            self._del_rule(rule_name)
+
+    def _add_rule(self, rule_name, rule):
+        if rule_name not in self.policy_rules:
+            self.congress.create_policy_rule(self.policy,
+                                             body={'name': rule_name,
+                                                   'rule': rule})
+
+    def _del_rule(self, rule_name):
+        if rule_name in self.policy_rules:
+            rule_id = self.policy_rules[rule_name]['id']
+            self.congress.delete_policy_rule(self.policy, rule_id)