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# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You 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 charmhelpers.core import hookenv, host, unitdata
from charms import layer
from charms.layer.apache_bigtop_base import Bigtop
from jujubigdata import utils
class Hive(object):
'''This class manages Hive.'''
def __init__(self):
self.dist_config = utils.DistConfig(
data=layer.options('apache-bigtop-base'))
def install(self, hbase=None):
'''
Trigger the Bigtop puppet recipe that handles the Hive service.
'''
# Dirs are handled by the bigtop deb. No need to call out to
# dist_config to do that. We do want 'ubuntu' in the hive group though.
self.dist_config.add_users()
# Prep config
roles = ['hive-client', 'hive-metastore', 'hive-server2']
metastore = "thrift://{}:9083".format(hookenv.unit_private_ip())
if hbase:
roles.append('hive-hbase')
hb_connect = "{}:{}".format(hbase['host'], hbase['master_port'])
zk_connect = hbase['zk_connect']
else:
hb_connect = ""
zk_connect = ""
override = {
'hadoop_hive::common_config::hbase_master': hb_connect,
'hadoop_hive::common_config::hbase_zookeeper_quorum': zk_connect,
'hadoop_hive::common_config::metastore_uris': metastore,
'hadoop_hive::common_config::server2_thrift_port':
self.dist_config.port('hive-thrift'),
'hadoop_hive::common_config::server2_thrift_http_port':
self.dist_config.port('hive-thrift-web'),
}
bigtop = Bigtop()
bigtop.render_site_yaml(roles=roles, overrides=override)
bigtop.trigger_puppet()
# Bigtop doesn't create a hive-env.sh, but we need it for heap config
hive_env = self.dist_config.path('hive_conf') / 'hive-env.sh'
if not hive_env.exists():
(self.dist_config.path('hive_conf') / 'hive-env.sh.template').copy(hive_env)
def configure_hive(self):
'''
Called during config-changed events
'''
config = hookenv.config()
hive_env = self.dist_config.path('hive_conf') / 'hive-env.sh'
utils.re_edit_in_place(hive_env, {
r'.*export HADOOP_HEAPSIZE *=.*': 'export HADOOP_HEAPSIZE=%s' % config['heap'],
})
def configure_remote_db(self, mysql):
hive_site = self.dist_config.path('hive_conf') / 'hive-site.xml'
jdbc_url = "jdbc:mysql://{}:{}/{}?createDatabaseIfNotExist=true".format(
mysql.host(), mysql.port(), mysql.database()
)
with utils.xmlpropmap_edit_in_place(hive_site) as props:
props['javax.jdo.option.ConnectionURL'] = jdbc_url
props['javax.jdo.option.ConnectionUserName'] = mysql.user()
props['javax.jdo.option.ConnectionPassword'] = mysql.password()
props['javax.jdo.option.ConnectionDriverName'] = "com.mysql.jdbc.Driver"
hive_env = self.dist_config.path('hive_conf') / 'hive-env.sh'
utils.re_edit_in_place(hive_env, {
r'.*export HIVE_AUX_JARS_PATH *=.*': 'export HIVE_AUX_JARS_PATH=/usr/share/java/mysql-connector-java.jar',
})
# Now that we have db connection info, init our schema (only once)
remote_db = hookenv.remote_service_name()
if not unitdata.kv().get('hive.schema.initialized.%s' % remote_db):
tool_path = "{}/bin/schematool".format(self.dist_config.path('hive'))
utils.run_as('ubuntu', tool_path, '-initSchema', '-dbType', 'mysql')
unitdata.kv().set('hive.schema.initialized.%s' % remote_db, True)
unitdata.kv().flush(True)
def configure_local_db(self):
local_url = 'jdbc:derby:;databaseName=/var/lib/hive/metastore/metastore_db;create=true'
local_driver = 'org.apache.derby.jdbc.EmbeddedDriver'
hive_site = self.dist_config.path('hive_conf') / 'hive-site.xml'
with utils.xmlpropmap_edit_in_place(hive_site) as props:
props['javax.jdo.option.ConnectionURL'] = local_url
props['javax.jdo.option.ConnectionUserName'] = 'APP'
props['javax.jdo.option.ConnectionPassword'] = 'mine'
props['javax.jdo.option.ConnectionDriverName'] = local_driver
hive_env = self.dist_config.path('hive_conf') / 'hive-env.sh'
utils.re_edit_in_place(hive_env, {
r'.*export HIVE_AUX_JARS_PATH *=.*': '# export HIVE_AUX_JARS_PATH=',
})
def restart(self):
self.stop()
self.start()
def start(self):
# order is important; metastore must start first.
hookenv.log('Starting Hive services')
host.service_start('hive-metastore')
host.service_start('hive-server2')
hookenv.log('Hive services have been started')
def stop(self):
# order is important; metastore must stop last.
hookenv.log('Stopping Hive services')
host.service_stop('hive-server2')
host.service_stop('hive-metastore')
hookenv.log('Hive services have been stopped')
def open_ports(self):
for port in self.dist_config.exposed_ports('hive'):
hookenv.open_port(port)
def close_ports(self):
for port in self.dist_config.exposed_ports('hive'):
hookenv.close_port(port)
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