deb-sahara/sahara/plugins/utils.py
Vitaly Gridnev f86890ee6b Configure NTP service on cluster instances
This patch implements configuring NTP service for
cluster instances, docs was updated as well.

Implements blueprint: support-ntp

Change-Id: I07c739b849d5f0d739833703167050d7637cf3fc
2015-07-27 15:26:42 +00:00

99 lines
3.2 KiB
Python

# Copyright (c) 2013 Mirantis Inc.
#
# 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.
import itertools
from oslo_utils import netutils
from six.moves.urllib import parse as urlparse
from sahara.i18n import _
from sahara.plugins import base as plugins_base
from sahara.plugins import exceptions as ex
def get_node_groups(cluster, node_process=None):
return [ng for ng in cluster.node_groups
if (node_process is None or
node_process in ng.node_processes)]
def get_instances_count(cluster, node_process=None):
return sum([ng.count for ng in get_node_groups(cluster, node_process)])
def get_instances(cluster, node_process=None):
nodes = get_node_groups(cluster, node_process)
return list(itertools.chain(*[node.instances for node in nodes]))
def get_instance(cluster, node_process):
instances = get_instances(cluster, node_process)
if len(instances) > 1:
raise ex.InvalidComponentCountException(
node_process, _('0 or 1'), len(instances))
return instances[0] if instances else None
def generate_host_names(nodes):
return "\n".join([n.hostname() for n in nodes])
def generate_fqdn_host_names(nodes):
return "\n".join([n.fqdn() for n in nodes])
def get_port_from_address(address):
parse_result = urlparse.urlparse(address)
# urlparse do not parse values like 0.0.0.0:8000,
# netutils do not parse values like http://localhost:8000,
# so combine approach is using
if parse_result.port:
return parse_result.port
else:
return netutils.parse_host_port(address)[1]
def instances_with_services(instances, node_processes):
node_processes = set(node_processes)
return list(filter(
lambda x: node_processes.intersection(
x.node_group.node_processes), instances))
def start_process_event_message(process):
return _("Start the following process(es): {process}").format(
process=process)
def get_config_value_or_default(service, name, cluster):
# Try getting config from the cluster.
for ng in cluster.node_groups:
if (ng.configuration().get(service) and
ng.configuration()[service].get(name)):
return ng.configuration()[service][name]
# Find and return the default
plugin = plugins_base.PLUGINS.get_plugin(cluster.plugin_name)
configs = plugin.get_all_configs(cluster.hadoop_version)
for config in configs:
if config.applicable_target == service and config.name == name:
return config.default_value
raise RuntimeError(_("Unable to get parameter '%(param_name)s' from "
"service %(service)s"),
{'param_name': name, 'service': service})