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#!/usr/bin/env python
# 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.
"""
Common implementation for all hooks.
"""
import jujuresources
from charmhelpers.core import hookenv
from charmhelpers.core import unitdata
from charmhelpers.core import charmframework
def bootstrap_resources():
"""
Install required resources defined in resources.yaml
"""
if unitdata.kv().get('charm.bootstrapped', False):
return True
hookenv.status_set('maintenance', 'Installing base resources')
mirror_url = jujuresources.config_get('resources_mirror')
if not jujuresources.fetch(mirror_url=mirror_url):
missing = jujuresources.invalid()
hookenv.status_set('blocked', 'Unable to fetch required resource%s: %s' % (
's' if len(missing) > 1 else '',
', '.join(missing),
))
return False
jujuresources.install(['pathlib', 'jujubigdata'])
unitdata.kv().set('charm.bootstrapped', True)
return True
def manage():
if not bootstrap_resources():
# defer until resources are available, since charmhelpers, and thus
# the framework, are required (will require manual intervention)
return
import jujubigdata
import callbacks
kafka_reqs = ['vendor', 'packages', 'groups', 'users', 'dirs', 'ports']
dist_config = jujubigdata.utils.DistConfig(filename='dist.yaml',
required_keys=kafka_reqs)
kafka = callbacks.Kafka(dist_config)
manager = charmframework.Manager([
{
'name': 'kafka',
'provides': [
jujubigdata.relations.Kafka(port=dist_config.port('kafka'))
],
'requires': [
kafka.verify_resources,
jujubigdata.relations.Zookeeper(),
callbacks.update_blocked_status, # not really a requirement, but best way to fit into framework
],
'callbacks': [
callbacks.update_working_status,
kafka.install,
kafka.configure_kafka,
kafka.restart,
charmframework.helpers.open_ports(
dist_config.exposed_ports('kafka')),
callbacks.update_active_status,
],
'cleanup': [
callbacks.clear_active_flag,
charmframework.helpers.close_ports(
dist_config.exposed_ports('kafka')),
kafka.stop,
kafka.cleanup,
callbacks.update_blocked_status,
],
},
])
manager.manage()
if __name__ == '__main__':
manage()
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