influxdb: do not try to create a database

This is not the responsibility of the driver to do that.

Change-Id: I72384a292b62e056f2082cee21bf916561f3d3d7
Closes-Bug: #1535487

gnocchi/storage/influxdb.py

@@ -73,18 +73,6 @@ class InfluxDBStorage(storage.StorageDriver):
                                               conf.influxdb_password,
                                               conf.influxdb_database)
         self.database = conf.influxdb_database
-        try:
-            dbs = [db['name'] for db in self.influx.get_list_database()]
-            if conf.influxdb_database not in dbs:
-                self.influx.create_database(conf.influxdb_database)
-        except influxdb.client.InfluxDBClientError as e:
-            if "database already exists" in e.content:
-                LOG.warning("InfluxDB database \"%s\" already exists",
-                            self.database)
-            else:
-                LOG.warning('InfluxDB database creation failed: %s %s'
-                            % (e.message, e.code), exc_info=True)
-                raise
 
     @staticmethod
     def _get_metric_id(metric):

gnocchi/tests/base.py

@@ -402,6 +402,7 @@ class TestCase(base.BaseTestCase):
         elif self.conf.storage.driver == 'influxdb':
             self.conf.set_override('influxdb_block_until_data_ingested', True,
                                    'storage')
+            self.conf.set_override('influxdb_database', 'test', 'storage')
             self.conf.set_override('influxdb_password', 'root', 'storage')
             self.conf.set_override('influxdb_port',
                                    os.getenv("GNOCCHI_TEST_INFLUXDB_PORT",

setup-influxdb-tests.sh

@@ -36,6 +36,8 @@ EOF
 PATH=$PATH:/opt/influxdb influxd -config $INFLUXDB_DATA/config > ${INFLUXDB_DATA}/out 2>&1 &
 # Wait for InfluxDB to start listening to connections
 wait_for_line "Listening on HTTP" ${INFLUXDB_DATA}/out
+influx -port $GNOCCHI_TEST_INFLUXDB_PORT -execute "CREATE DATABASE test;"
+
 
 $*