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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.
import hashlib
from charms.reactive import when, when_not
from charms.reactive import is_state, set_state, remove_state
from charmhelpers.core import hookenv
from charms.layer.apache_bigtop_base import get_package_version
from charms.layer.bigtop_zeppelin import Zeppelin
from charms.reactive.helpers import data_changed
@when('zeppelin.installed')
def update_status():
hadoop_joined = is_state('hadoop.joined')
hadoop_ready = is_state('hadoop.ready')
hive_joined = is_state('hive.connected')
hive_ready = is_state('hive.available')
spark_joined = is_state('spark.joined')
spark_ready = is_state('spark.ready')
waiting_apps = []
ready_apps = []
# Check status of the hadoop plugin
if hadoop_joined and not hadoop_ready:
waiting_apps.append('hadoop')
elif hadoop_ready:
ready_apps.append('hadoop')
# Check status of Hive
if hive_joined and not hive_ready:
waiting_apps.append('hive')
elif hive_ready:
ready_apps.append('hive')
# Check status of Spark
if spark_joined and not spark_ready:
waiting_apps.append('spark')
elif spark_ready:
ready_apps.append('spark')
# Set appropriate status based on the apps we checked above
if waiting_apps:
hookenv.status_set('waiting',
'waiting for: {}'.format(' & '.join(waiting_apps)))
elif ready_apps:
hookenv.status_set('active',
'ready with: {}'.format(' & '.join(ready_apps)))
else:
hookenv.status_set('active', 'ready')
@when('bigtop.available')
@when_not('zeppelin.installed')
def initial_setup():
hookenv.status_set('maintenance', 'installing zeppelin')
zeppelin = Zeppelin()
zeppelin.install()
zeppelin.setup_etc_env()
zeppelin.open_ports()
set_state('zeppelin.installed')
update_status()
# set app version string for juju status output
zeppelin_version = get_package_version('zeppelin') or 'unknown'
hookenv.application_version_set(zeppelin_version)
@when('zeppelin.installed')
@when('hadoop.ready')
@when_not('zeppelin.hadoop.configured')
def configure_hadoop(hadoop):
zeppelin = Zeppelin()
zeppelin.configure_hadoop()
zeppelin.register_hadoop_notebooks()
set_state('zeppelin.hadoop.configured')
@when('zeppelin.installed')
@when_not('hadoop.ready')
@when('zeppelin.hadoop.configured')
def unconfigure_hadoop():
zeppelin = Zeppelin()
zeppelin.remove_hadoop_notebooks()
remove_state('zeppelin.hadoop.configured')
@when('zeppelin.installed', 'hive.ready')
def configure_hive(hive):
hive_ip = hive.get_private_ip()
hive_port = hive.get_port()
hive_url = 'jdbc:hive2://%s:%s' % (hive_ip, hive_port)
if data_changed('hive.connect', hive_url):
hookenv.status_set('maintenance', 'configuring hive')
zeppelin = Zeppelin()
zeppelin.configure_hive(hive_url)
set_state('zeppelin.hive.configured')
update_status()
@when('zeppelin.installed', 'zeppelin.hive.configured')
@when_not('hive.ready')
def unconfigure_hive():
hookenv.status_set('maintenance', 'removing hive relation')
zeppelin = Zeppelin()
zeppelin.configure_hive('jdbc:hive2://:')
remove_state('zeppelin.hive.configured')
update_status()
@when('zeppelin.installed', 'spark.ready')
def configure_spark(spark):
master_url = spark.get_master_url()
if data_changed('spark.master', master_url):
hookenv.status_set('maintenance', 'configuring spark')
zeppelin = Zeppelin()
zeppelin.configure_spark(master_url)
set_state('zeppelin.spark.configured')
update_status()
@when('zeppelin.installed', 'zeppelin.spark.configured')
@when_not('spark.ready')
def unconfigure_spark():
hookenv.status_set('maintenance', 'removing spark relation')
zeppelin = Zeppelin()
# Yarn / Hadoop may not actually be available, but that is the default
# value and nothing else would reasonably work here either without Spark.
zeppelin.configure_spark('yarn-client')
data_changed('spark.master', 'yarn-client') # ensure updated if re-added
remove_state('zeppelin.spark.configured')
update_status()
@when('zeppelin.started', 'client.notebook.registered')
def register_notebook(client):
zeppelin = Zeppelin()
for notebook in client.unregistered_notebooks():
notebook_md5 = hashlib.md5(notebook.encode('utf8')).hexdigest()
if zeppelin.register_notebook(notebook_md5, notebook):
client.accept_notebook(notebook)
else:
client.reject_notebook(notebook)
@when('zeppelin.started', 'client.notebook.removed')
def remove_notebook(client):
zeppelin = Zeppelin()
for notebook in client.unremoved_notebooks():
notebook_md5 = hashlib.md5(notebook.encode('utf8')).hexdigest()
zeppelin.remove_notebook(notebook_md5)
client.remove_notebook(notebook)
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