6894d85bb8
Extend HDP 2.0.6 plugin to include the setup and configuration of the HDFS NameNode High Availability after creating and configuring the cluster. Change-Id: I32116d42453bd3470b65bf863cf493f27301dab7 Implements: blueprint hdp-plugin-enable-hdfs-ha
408 lines
16 KiB
Python
408 lines
16 KiB
Python
# Copyright (c) 2013 Hortonworks, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from oslo.config import cfg
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from sahara import conductor
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from sahara import context
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from sahara.i18n import _
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from sahara.i18n import _LI
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from sahara.openstack.common import log as logging
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from sahara.plugins import exceptions as ex
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from sahara.plugins.hdp import hadoopserver as h
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from sahara.plugins.hdp import saharautils as utils
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from sahara.plugins.hdp.versions import versionhandlerfactory as vhf
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from sahara.plugins import provisioning as p
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from sahara.topology import topology_helper as th
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from sahara.utils import general as g
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conductor = conductor.API
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LOG = logging.getLogger(__name__)
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CONF = cfg.CONF
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class AmbariPlugin(p.ProvisioningPluginBase):
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def __init__(self):
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self.cluster_ambari_mapping = {}
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self.version_factory = vhf.VersionHandlerFactory.get_instance()
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def create_cluster(self, cluster):
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version = cluster.hadoop_version
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handler = self.version_factory.get_version_handler(version)
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cluster_spec = handler.get_cluster_spec(
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cluster, self._map_to_user_inputs(
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version, cluster.cluster_configs))
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hosts = self._get_servers(cluster)
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ambari_info = self.get_ambari_info(cluster_spec)
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self.cluster_ambari_mapping[cluster.name] = ambari_info
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rpm = self._get_rpm_uri(cluster_spec)
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servers = []
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for host in hosts:
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host_role = utils.get_host_role(host)
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servers.append(
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h.HadoopServer(host, cluster_spec.node_groups[host_role],
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ambari_rpm=rpm))
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self._provision_cluster(
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cluster.name, cluster_spec, ambari_info, servers,
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cluster.hadoop_version)
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# add the topology data file and script if rack awareness is
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# enabled
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self._configure_topology_for_cluster(cluster, servers)
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LOG.info(_LI("Install of Hadoop stack successful."))
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# add service urls
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self._set_cluster_info(cluster, cluster_spec)
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# check if HDFS HA is enabled; set it up if so
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if cluster_spec.is_hdfs_ha_enabled(cluster):
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cluster = g.change_cluster_status(cluster, "Configuring HA")
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self.configure_hdfs_ha(cluster)
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def configure_hdfs_ha(self, cluster):
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version = cluster.hadoop_version
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handler = self.version_factory.get_version_handler(version)
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cluster_spec = handler.get_cluster_spec(
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cluster, self._map_to_user_inputs(
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version, cluster.cluster_configs))
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hosts = self._get_servers(cluster)
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ambari_info = self.get_ambari_info(cluster_spec)
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self.cluster_ambari_mapping[cluster.name] = ambari_info
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rpm = self._get_rpm_uri(cluster_spec)
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servers = []
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for host in hosts:
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host_role = utils.get_host_role(host)
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servers.append(
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h.HadoopServer(host, cluster_spec.node_groups[host_role],
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ambari_rpm=rpm))
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ambari_client = handler.get_ambari_client()
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ambari_client.setup_hdfs_ha(cluster_spec, servers, ambari_info,
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cluster.name)
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def _get_servers(self, cluster):
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servers = []
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if hasattr(cluster, 'node_groups') and cluster.node_groups is not None:
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# code for a cluster object
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for node_group in cluster.node_groups:
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servers += node_group.instances
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else:
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# cluster is actually a cloud context
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servers = cluster.instances
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return servers
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def get_node_processes(self, hadoop_version):
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node_processes = {}
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version_handler = (
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self.version_factory.get_version_handler(hadoop_version))
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default_config = version_handler.get_default_cluster_configuration()
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for service in default_config.services:
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components = []
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for component in service.components:
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if service.is_user_template_component(component):
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components.append(component.name)
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node_processes[service.name] = components
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return node_processes
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def convert(self, config, plugin_name, version, template_name,
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cluster_template_create):
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handler = self.version_factory.get_version_handler(version)
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normalized_config = handler.get_cluster_spec(
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None, None, cluster_template=config).normalize()
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node_groups = []
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for ng in normalized_config.node_groups:
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node_group = {
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"name": ng.name,
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"flavor_id": ng.flavor,
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"node_processes": ng.node_processes,
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"count": ng.count
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}
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node_groups.append(node_group)
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cluster_configs = dict()
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config_resource = handler.get_config_items()
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for entry in normalized_config.cluster_configs:
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user_input = next((ui for ui in config_resource
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if entry.config.name == ui.name), None)
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if user_input is not None:
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ci = entry.config
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# get the associated service dictionary
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target = entry.config.applicable_target
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service_dict = cluster_configs.get(target, {})
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service_dict[ci.name] = entry.value
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cluster_configs[target] = service_dict
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else:
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LOG.debug('Template based input "{0}" is being filtered out as'
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' it is not considered a user input'
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.format(entry.config.name))
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ctx = context.ctx()
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return cluster_template_create(ctx,
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{"name": template_name,
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"plugin_name": plugin_name,
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"hadoop_version": version,
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"node_groups": node_groups,
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"cluster_configs": cluster_configs})
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def get_edp_engine(self, cluster, job_type):
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version_handler = (
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self.version_factory.get_version_handler(cluster.hadoop_version))
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return version_handler.get_edp_engine(cluster, job_type)
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def update_infra(self, cluster):
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pass
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def convert_props_to_template(self, props):
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raise NotImplementedError('not yet supported')
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def _spawn(self, description, func, *args, **kwargs):
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context.spawn(description, func, *args, **kwargs)
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def _provision_cluster(self, name, cluster_spec, ambari_info,
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servers, version):
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# TODO(jspeidel): encapsulate in another class
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LOG.info(_LI('Provisioning Cluster via Ambari Server: {0} ...')
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.format(ambari_info.get_address()))
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for server in servers:
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self._spawn(
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"hdp-provision-instance-%s" % server.instance.hostname(),
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server.provision_ambari, ambari_info, cluster_spec)
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handler = self.version_factory.get_version_handler(version)
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ambari_client = handler.get_ambari_client()
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ambari_client.wait_for_host_registrations(len(servers), ambari_info)
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self._set_ambari_credentials(cluster_spec, ambari_info, version)
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ambari_client.provision_cluster(
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cluster_spec, servers, ambari_info, name)
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# TODO(jspeidel): invoke during scale cluster. Will need to handle dups
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def _set_cluster_info(self, cluster, cluster_spec):
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info = {}
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for service in cluster_spec.services:
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if service.deployed:
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service.register_service_urls(cluster_spec, info)
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conductor.cluster_update(context.ctx(), cluster, {'info': info})
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def _set_ambari_credentials(self, cluster_spec, ambari_info, version):
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services = cluster_spec.services
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ambari_client = (self.version_factory.get_version_handler(version).
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get_ambari_client())
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for service in services:
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if service.name == 'AMBARI':
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is_admin_provided = False
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admin_user = ambari_info.user
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admin_password = ambari_info.password
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for user in service.users:
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if user.name == 'admin':
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ambari_client.update_ambari_admin_user(
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user.password, ambari_info)
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is_admin_provided = True
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ambari_info.user = 'admin'
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ambari_info.password = user.password
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else:
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ambari_client.add_ambari_user(user, ambari_info)
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if 'admin' in user.groups:
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admin_user = user.name
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admin_password = user.password
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if not is_admin_provided:
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if admin_user is None:
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raise ex.HadoopProvisionError(_("An Ambari user in the"
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" admin group must be "
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"configured."))
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ambari_info.user = admin_user
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ambari_info.password = admin_password
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ambari_client.delete_ambari_user('admin', ambari_info)
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break
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def _update_ambari_info_credentials(self, cluster_spec, ambari_info):
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services = cluster_spec.services
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ambari_service = next((service for service in services if
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service.name == 'AMBARI'), None)
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if ambari_service is not None:
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admin_user = next((user for user in ambari_service.users
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if 'admin' in user.groups), None)
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if admin_user is not None:
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ambari_info.user = admin_user.name
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ambari_info.password = admin_user.password
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LOG.info(_LI('Using "{0}" as admin user for scaling of cluster')
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.format(ambari_info.user))
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# PLUGIN SPI METHODS:
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def get_versions(self):
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return self.version_factory.get_versions()
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def configure_cluster(self, cluster):
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self.create_cluster(cluster)
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def get_configs(self, hadoop_version):
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handler = self.version_factory.get_version_handler(hadoop_version)
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return handler.get_config_items()
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# cluster name argument supports the non-sahara cluster creation mode
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def start_cluster(self, cluster):
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client = self.version_factory.get_version_handler(
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cluster.hadoop_version).get_ambari_client()
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handler = self.version_factory.get_version_handler(
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cluster.hadoop_version)
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cluster_spec = handler.get_cluster_spec(
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cluster, self._map_to_user_inputs(
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cluster.hadoop_version, cluster.cluster_configs))
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try:
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client.start_services(cluster.name, cluster_spec,
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self.cluster_ambari_mapping[cluster.name])
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finally:
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client.cleanup(self.cluster_ambari_mapping[cluster.name])
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def get_title(self):
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return 'Hortonworks Data Platform'
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def get_description(self):
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return _('The Hortonworks Sahara plugin automates the deployment '
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'of the Hortonworks Data Platform (HDP) on OpenStack.')
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def validate(self, cluster):
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# creating operational config results in validation
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handler = self.version_factory.get_version_handler(
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cluster.hadoop_version)
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handler.get_cluster_spec(cluster, self._map_to_user_inputs(
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cluster.hadoop_version, cluster.cluster_configs))
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def scale_cluster(self, cluster, instances):
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handler = self.version_factory.get_version_handler(
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cluster.hadoop_version)
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ambari_client = handler.get_ambari_client()
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cluster_spec = handler.get_cluster_spec(
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cluster, self._map_to_user_inputs(
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cluster.hadoop_version, cluster.cluster_configs))
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rpm = self._get_rpm_uri(cluster_spec)
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servers = []
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for instance in instances:
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host_role = utils.get_host_role(instance)
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servers.append(h.HadoopServer(instance,
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cluster_spec.node_groups
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[host_role],
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ambari_rpm=rpm))
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ambari_info = self.get_ambari_info(cluster_spec)
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self._update_ambari_info_credentials(cluster_spec, ambari_info)
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for server in servers:
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self._spawn('Ambari provisioning thread',
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server.provision_ambari, ambari_info, cluster_spec)
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ambari_client.configure_scaled_cluster_instances(
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cluster.name, cluster_spec, self._get_num_hosts(cluster),
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ambari_info)
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self._configure_topology_for_cluster(cluster, servers)
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ambari_client.start_scaled_cluster_instances(cluster.name,
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cluster_spec, servers,
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ambari_info)
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ambari_client.cleanup(ambari_info)
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def decommission_nodes(self, cluster, instances):
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LOG.info(_LI('AmbariPlugin: decommission_nodes called for '
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'HDP version = %s'), cluster.hadoop_version)
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handler = self.version_factory.get_version_handler(
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cluster.hadoop_version)
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ambari_client = handler.get_ambari_client()
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cluster_spec = handler.get_cluster_spec(
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cluster, self._map_to_user_inputs(
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cluster.hadoop_version, cluster.cluster_configs))
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ambari_info = self.get_ambari_info(cluster_spec)
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ambari_client.decommission_cluster_instances(cluster, cluster_spec,
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instances,
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ambari_info)
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def validate_scaling(self, cluster, existing, additional):
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handler = self.version_factory.get_version_handler(
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cluster.hadoop_version)
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# results in validation
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handler.get_cluster_spec(
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cluster, [], dict(existing.items() + additional.items()))
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def _get_num_hosts(self, cluster):
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count = 0
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for node_group in cluster.node_groups:
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count += node_group.count
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return count
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def _get_host_list(self, servers):
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host_list = [server.instance.fqdn().lower() for server in servers]
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return ",".join(host_list)
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def _get_rpm_uri(self, cluster_spec):
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ambari_config = cluster_spec.configurations['ambari']
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return ambari_config.get('rpm', None)
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def get_ambari_info(self, cluster_spec):
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ambari_host = cluster_spec.determine_component_hosts(
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'AMBARI_SERVER').pop()
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port = cluster_spec.configurations['ambari'].get(
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'server.port', '8080')
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return AmbariInfo(ambari_host, port, 'admin', 'admin')
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def _configure_topology_for_cluster(self, cluster, servers):
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if CONF.enable_data_locality:
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topology_data = th.generate_topology_map(
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cluster, CONF.enable_hypervisor_awareness)
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topology_str = "\n".join(
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[k + " " + v for k, v in topology_data.items()]) + "\n"
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for server in servers:
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server.configure_topology(topology_str)
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def get_open_ports(self, node_group):
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handler = self.version_factory.get_version_handler(
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node_group.cluster.hadoop_version)
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return handler.get_open_ports(node_group)
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class AmbariInfo(object):
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def __init__(self, host, port, user, password):
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self.host = host
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self.port = port
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self.user = user
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self.password = password
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def get_address(self):
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return '{0}:{1}'.format(self.host.management_ip, self.port)
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