497 lines
19 KiB
Python
497 lines
19 KiB
Python
# Copyright (c) 2013 Mirantis 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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import uuid
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from oslo.config import cfg
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import six
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from savanna import conductor
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from savanna import context
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from savanna.openstack.common import log as logging
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from savanna.plugins.general import exceptions as ex
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from savanna.plugins.general import utils
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from savanna.plugins import provisioning as p
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from savanna.plugins.vanilla import config_helper as c_helper
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from savanna.plugins.vanilla import run_scripts as run
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from savanna.plugins.vanilla import scaling as sc
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from savanna.topology import topology_helper as th
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from savanna.utils import files as f
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from savanna.utils import general as g
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from savanna.utils import remote
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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 VanillaProvider(p.ProvisioningPluginBase):
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def __init__(self):
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self.processes = {
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"HDFS": ["namenode", "datanode", "secondarynamenode"],
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"MapReduce": ["tasktracker", "jobtracker"],
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"JobFlow": ["oozie"],
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"Hive": ["hiveserver"]
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}
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def get_title(self):
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return "Vanilla Apache Hadoop"
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def get_description(self):
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return (
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"This plugin provides an ability to launch vanilla Apache Hadoop "
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"1.2.1 cluster without any management consoles. Also it can "
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"deploy Oozie 4.0.0 and Hive 0.11.0")
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def get_oozie_server(self, cluster):
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return utils.get_instance(cluster, "oozie")
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def get_versions(self):
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return ['1.2.1']
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def get_configs(self, hadoop_version):
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return c_helper.get_plugin_configs()
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def get_hive_config_path(self):
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return "/opt/hive/conf/hive-site.xml"
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def get_hdfs_user(self):
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return 'hadoop'
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def get_node_processes(self, hadoop_version):
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return self.processes
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def validate(self, cluster):
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nn_count = sum([ng.count for ng
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in utils.get_node_groups(cluster, "namenode")])
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if nn_count != 1:
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raise ex.NotSingleNameNodeException(nn_count)
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jt_count = sum([ng.count for ng
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in utils.get_node_groups(cluster, "jobtracker")])
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if jt_count not in [0, 1]:
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raise ex.NotSingleJobTrackerException(jt_count)
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oozie_count = sum([ng.count for ng
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in utils.get_node_groups(cluster, "oozie")])
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if oozie_count not in [0, 1]:
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raise ex.NotSingleOozieException(oozie_count)
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hive_count = sum([ng.count for ng
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in utils.get_node_groups(cluster, "hiveserver")])
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if jt_count == 0:
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tt_count = sum([ng.count for ng
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in utils.get_node_groups(cluster, "tasktracker")])
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if tt_count > 0:
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raise ex.TaskTrackersWithoutJobTracker()
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if oozie_count > 0:
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raise ex.OozieWithoutJobTracker()
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if hive_count > 0:
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raise ex.HiveWithoutJobTracker()
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if hive_count not in [0, 1]:
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raise ex.NotSingleHiveException(hive_count)
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def update_infra(self, cluster):
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pass
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def configure_cluster(self, cluster):
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instances = utils.get_instances(cluster)
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self._setup_instances(cluster, instances)
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def start_cluster(self, cluster):
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nn_instance = utils.get_namenode(cluster)
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with remote.get_remote(nn_instance) as r:
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run.format_namenode(r)
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run.start_processes(r, "namenode")
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for snn in utils.get_secondarynamenodes(cluster):
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run.start_processes(remote.get_remote(snn), "secondarynamenode")
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jt_instance = utils.get_jobtracker(cluster)
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if jt_instance:
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run.start_processes(remote.get_remote(jt_instance), "jobtracker")
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self._start_tt_dn_processes(utils.get_instances(cluster))
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self._await_datanodes(cluster)
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LOG.info("Hadoop services in cluster %s have been started" %
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cluster.name)
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oozie = utils.get_oozie(cluster)
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if oozie:
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with remote.get_remote(oozie) as r:
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if c_helper.is_mysql_enable(cluster):
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run.mysql_start(r, oozie)
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run.oozie_create_db(r)
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run.oozie_share_lib(r, nn_instance.hostname())
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run.start_oozie(r)
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LOG.info("Oozie service at '%s' has been started",
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nn_instance.hostname())
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hive_server = utils.get_hiveserver(cluster)
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if hive_server:
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with remote.get_remote(nn_instance) as r:
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run.hive_create_warehouse_dir(r)
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if c_helper.is_mysql_enable(cluster):
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with remote.get_remote(hive_server) as h:
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if not oozie or hive_server.hostname() != oozie.hostname():
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run.mysql_start(h, hive_server)
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run.hive_create_db(h)
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run.hive_metastore_start(h)
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LOG.info("Hive Metastore server at %s has been started",
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hive_server.hostname())
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LOG.info('Cluster %s has been started successfully' % cluster.name)
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self._set_cluster_info(cluster)
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def _await_datanodes(self, cluster):
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datanodes_count = len(utils.get_datanodes(cluster))
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if datanodes_count < 1:
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return
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LOG.info("Waiting %s datanodes to start up" % datanodes_count)
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with remote.get_remote(utils.get_namenode(cluster)) as r:
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while True:
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if run.check_datanodes_count(r, datanodes_count):
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LOG.info(
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'Datanodes on cluster %s has been started' %
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cluster.name)
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return
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context.sleep(1)
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if not g.check_cluster_exists(cluster):
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LOG.info(
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'Stop waiting datanodes on cluster %s since it has '
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'been deleted' % cluster.name)
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return
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def _extract_configs_to_extra(self, cluster):
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oozie = utils.get_oozie(cluster)
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hive = utils.get_hiveserver(cluster)
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extra = dict()
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if hive:
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extra['hive_mysql_passwd'] = six.text_type(uuid.uuid4())
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for ng in cluster.node_groups:
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extra[ng.id] = {
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'xml': c_helper.generate_xml_configs(
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cluster, ng, extra['hive_mysql_passwd'] if hive else None),
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'setup_script': c_helper.generate_setup_script(
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ng.storage_paths(),
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c_helper.extract_environment_confs(ng.configuration()),
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append_oozie=(
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oozie and oozie.node_group.id == ng.id)
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)
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}
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if c_helper.is_data_locality_enabled(cluster):
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topology_data = th.generate_topology_map(
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cluster, CONF.enable_hypervisor_awareness)
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extra['topology_data'] = "\n".join(
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[k + " " + v for k, v in topology_data.items()]) + "\n"
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return extra
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def decommission_nodes(self, cluster, instances):
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tts = utils.get_tasktrackers(cluster)
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dns = utils.get_datanodes(cluster)
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decommission_dns = False
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decommission_tts = False
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for i in instances:
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if 'datanode' in i.node_group.node_processes:
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dns.remove(i)
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decommission_dns = True
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if 'tasktracker' in i.node_group.node_processes:
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tts.remove(i)
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decommission_tts = True
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nn = utils.get_namenode(cluster)
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jt = utils.get_jobtracker(cluster)
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if decommission_tts:
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sc.decommission_tt(jt, instances, tts)
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if decommission_dns:
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sc.decommission_dn(nn, instances, dns)
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def validate_scaling(self, cluster, existing, additional):
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self._validate_existing_ng_scaling(cluster, existing)
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self._validate_additional_ng_scaling(cluster, additional)
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def scale_cluster(self, cluster, instances):
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self._setup_instances(cluster, instances)
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run.refresh_nodes(remote.get_remote(
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utils.get_namenode(cluster)), "dfsadmin")
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jt = utils.get_jobtracker(cluster)
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if jt:
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run.refresh_nodes(remote.get_remote(jt), "mradmin")
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self._start_tt_dn_processes(instances)
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def _start_tt_dn_processes(self, instances):
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tt_dn_names = ["datanode", "tasktracker"]
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with context.ThreadGroup() as tg:
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for i in instances:
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processes = set(i.node_group.node_processes)
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tt_dn_procs = processes.intersection(tt_dn_names)
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if tt_dn_procs:
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tg.spawn('vanilla-start-tt-dn-%s' % i.instance_name,
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self._start_tt_dn, i, list(tt_dn_procs))
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def _start_tt_dn(self, instance, tt_dn_procs):
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with instance.remote() as r:
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run.start_processes(r, *tt_dn_procs)
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def _setup_instances(self, cluster, instances):
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extra = self._extract_configs_to_extra(cluster)
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self._push_configs_to_nodes(cluster, extra, instances)
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def _push_configs_to_nodes(self, cluster, extra, new_instances):
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all_instances = utils.get_instances(cluster)
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with context.ThreadGroup() as tg:
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for instance in all_instances:
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if instance in new_instances:
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tg.spawn('vanilla-configure-%s' % instance.instance_name,
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self._push_configs_to_new_node, cluster,
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extra, instance)
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else:
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tg.spawn('vanilla-reconfigure-%s' % instance.instance_name,
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self._push_configs_to_existing_node, cluster,
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extra, instance)
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def _push_configs_to_new_node(self, cluster, extra, instance):
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ng_extra = extra[instance.node_group.id]
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private_key, public_key = c_helper.get_hadoop_ssh_keys(cluster)
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files = {
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'/etc/hadoop/core-site.xml': ng_extra['xml']['core-site'],
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'/etc/hadoop/mapred-site.xml': ng_extra['xml']['mapred-site'],
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'/etc/hadoop/hdfs-site.xml': ng_extra['xml']['hdfs-site'],
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'/tmp/savanna-hadoop-init.sh': ng_extra['setup_script'],
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'id_rsa': private_key,
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'authorized_keys': public_key
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}
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key_cmd = 'sudo mkdir -p /home/hadoop/.ssh/ && ' \
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'sudo mv id_rsa authorized_keys /home/hadoop/.ssh && ' \
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'sudo chown -R hadoop:hadoop /home/hadoop/.ssh && ' \
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'sudo chmod 600 /home/hadoop/.ssh/{id_rsa,authorized_keys}'
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with remote.get_remote(instance) as r:
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# TODO(aignatov): sudo chown is wrong solution. But it works.
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r.execute_command(
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'sudo chown -R $USER:$USER /etc/hadoop'
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)
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r.execute_command(
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'sudo chown -R $USER:$USER /opt/oozie/conf'
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)
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r.write_files_to(files)
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r.execute_command(
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'sudo chmod 0500 /tmp/savanna-hadoop-init.sh'
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)
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r.execute_command(
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'sudo /tmp/savanna-hadoop-init.sh '
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'>> /tmp/savanna-hadoop-init.log 2>&1')
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r.execute_command(key_cmd)
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if c_helper.is_data_locality_enabled(cluster):
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r.write_file_to(
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'/etc/hadoop/topology.sh',
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f.get_file_text(
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'plugins/vanilla/resources/topology.sh'))
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r.execute_command(
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'sudo chmod +x /etc/hadoop/topology.sh'
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)
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self._write_topology_data(r, cluster, extra)
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self._push_master_configs(r, cluster, extra, instance)
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def _push_configs_to_existing_node(self, cluster, extra, instance):
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node_processes = instance.node_group.node_processes
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need_update = (c_helper.is_data_locality_enabled(cluster) or
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'namenode' in node_processes or
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'jobtracker' in node_processes or
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'oozie' in node_processes or
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'hiveserver' in node_processes)
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if not need_update:
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return
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with remote.get_remote(instance) as r:
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self._write_topology_data(r, cluster, extra)
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self._push_master_configs(r, cluster, extra, instance)
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def _write_topology_data(self, r, cluster, extra):
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if c_helper.is_data_locality_enabled(cluster):
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topology_data = extra['topology_data']
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r.write_file_to('/etc/hadoop/topology.data', topology_data)
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def _push_master_configs(self, r, cluster, extra, instance):
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ng_extra = extra[instance.node_group.id]
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node_processes = instance.node_group.node_processes
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if 'namenode' in node_processes:
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self._push_namenode_configs(cluster, r)
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if 'jobtracker' in node_processes:
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self._push_jobtracker_configs(cluster, r)
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if 'oozie' in node_processes:
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self._push_oozie_configs(cluster, ng_extra, r)
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if 'hiveserver' in node_processes:
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self._push_hive_configs(cluster, ng_extra,
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extra['hive_mysql_passwd'], r)
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def _push_namenode_configs(self, cluster, r):
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r.write_file_to('/etc/hadoop/dn.incl',
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utils.generate_fqdn_host_names(
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utils.get_datanodes(cluster)))
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def _push_jobtracker_configs(self, cluster, r):
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r.write_file_to('/etc/hadoop/tt.incl',
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utils.generate_fqdn_host_names(
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utils.get_tasktrackers(cluster)))
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def _push_oozie_configs(self, cluster, ng_extra, r):
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r.write_file_to('/opt/oozie/conf/oozie-site.xml',
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ng_extra['xml']['oozie-site'])
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if c_helper.is_mysql_enable(cluster):
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sql_script = f.get_file_text(
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'plugins/vanilla/resources/create_oozie_db.sql')
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files = {
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'/tmp/create_oozie_db.sql': sql_script
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}
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r.write_files_to(files)
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def _push_hive_configs(self, cluster, ng_extra, hive_mysql_passwd, r):
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files = {
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'/opt/hive/conf/hive-site.xml':
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ng_extra['xml']['hive-site']
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}
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if c_helper.is_mysql_enable(cluster):
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sql_script = f.get_file_text(
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'plugins/vanilla/resources/create_hive_db.sql'
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)
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sql_script = sql_script.replace('pass',
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hive_mysql_passwd)
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files.update({'/tmp/create_hive_db.sql': sql_script})
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r.write_files_to(files)
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def _set_cluster_info(self, cluster):
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nn = utils.get_namenode(cluster)
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jt = utils.get_jobtracker(cluster)
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oozie = utils.get_oozie(cluster)
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info = {}
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if jt:
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ui_port = c_helper.get_port_from_config(
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'MapReduce', 'mapred.job.tracker.http.address', cluster)
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jt_port = c_helper.get_port_from_config(
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'MapReduce', 'mapred.job.tracker', cluster)
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info['MapReduce'] = {
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'Web UI': 'http://%s:%s' % (jt.management_ip, ui_port),
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'JobTracker': '%s:%s' % (jt.hostname(), jt_port)
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}
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if nn:
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ui_port = c_helper.get_port_from_config('HDFS', 'dfs.http.address',
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cluster)
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nn_port = c_helper.get_port_from_config('HDFS', 'fs.default.name',
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cluster)
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info['HDFS'] = {
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'Web UI': 'http://%s:%s' % (nn.management_ip, ui_port),
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'NameNode': 'hdfs://%s:%s' % (nn.hostname(), nn_port)
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}
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if oozie:
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#TODO(yrunts) change from hardcode value
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info['JobFlow'] = {
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'Oozie': 'http://%s:11000' % oozie.management_ip
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}
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ctx = context.ctx()
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conductor.cluster_update(ctx, cluster, {'info': info})
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def _get_scalable_processes(self):
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return ["datanode", "tasktracker"]
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def _get_by_id(self, lst, id):
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for obj in lst:
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if obj.id == id:
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return obj
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return None
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def _validate_additional_ng_scaling(self, cluster, additional):
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jt = utils.get_jobtracker(cluster)
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scalable_processes = self._get_scalable_processes()
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for ng_id in additional:
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ng = self._get_by_id(cluster.node_groups, ng_id)
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if not set(ng.node_processes).issubset(scalable_processes):
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raise ex.NodeGroupCannotBeScaled(
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ng.name, "Vanilla plugin cannot scale nodegroup"
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" with processes: " +
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' '.join(ng.node_processes))
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if not jt and 'tasktracker' in ng.node_processes:
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raise ex.NodeGroupCannotBeScaled(
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ng.name, "Vanilla plugin cannot scale node group with "
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"processes which have no master-processes run "
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"in cluster")
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def _validate_existing_ng_scaling(self, cluster, existing):
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scalable_processes = self._get_scalable_processes()
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dn_to_delete = 0
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for ng in cluster.node_groups:
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if ng.id in existing:
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if ng.count > existing[ng.id] and "datanode" in \
|
|
ng.node_processes:
|
|
dn_to_delete += ng.count - existing[ng.id]
|
|
if not set(ng.node_processes).issubset(scalable_processes):
|
|
raise ex.NodeGroupCannotBeScaled(
|
|
ng.name, "Vanilla plugin cannot scale nodegroup"
|
|
" with processes: " +
|
|
' '.join(ng.node_processes))
|
|
|
|
dn_amount = len(utils.get_datanodes(cluster))
|
|
rep_factor = c_helper.get_config_value('HDFS', 'dfs.replication',
|
|
cluster)
|
|
|
|
if dn_to_delete > 0 and dn_amount - dn_to_delete < rep_factor:
|
|
raise ex.ClusterCannotBeScaled(
|
|
cluster.name, "Vanilla plugin cannot shrink cluster because "
|
|
"it would be not enough nodes for replicas "
|
|
"(replication factor is %s)" % rep_factor)
|