#!/usr/bin/env python """ 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. Ambari Agent """ import os import grp import re from resource_management import Script import sys CONFIG_PARAM_PREFIX = 'component_configurations' CONFIG_PARAM_SEPARATOR = '/' MAX_SUBST = 40 # Check if the specified in config properties directory exists and is empty # or can be created on the host PROPERTIES_TO_CHECK = { # HDFS "NAMENODE": { "hadoop-env": ["hdfs_log_dir_prefix", "hadoop_pid_dir_prefix"], "hdfs-site": ["dfs.namenode.name.dir"] }, "DATANODE": { "hadoop-env": ["hdfs_log_dir_prefix", "hadoop_pid_dir_prefix", "dfs.domain.socket.path"], "hdfs-site": ["dfs.datanode.data.dir"] }, "SECONDARY_NAMENODE": { "hadoop-env": ["hdfs_log_dir_prefix", "hadoop_pid_dir_prefix"], "hdfs-site": ["dfs.namenode.checkpoint.dir", "dfs.namenode.checkpoint.edits.dir"] }, "JOURNALNODE": { "hadoop-env": ["hdfs_log_dir_prefix", "hadoop_pid_dir_prefix"], "hdfs-site": ["dfs.journalnode.edits.dir"] }, #MAPREDUCE "JOBTRACKER": { "mapred-env": ["mapred_local_dir", "mapred_system_dir", "mapred_jobstatus_dir"], "mapred-site": ["mapred.local.dir", "mapred.healthChecker.script.path", "mapred.job.tracker.persist.jobstatus.dir"] }, "TASKTRACKER": { "mapred-env": ["mapred_local_dir", "mapred_system_dir", "mapred_jobstatus_dir"], "mapred-site": ["mapred.local.dir", "mapred.healthChecker.script.path"] }, "MAPREDUCE_CLIENT": { "mapred-env": ["mapred_local_dir", "mapred_system_dir", "mapred_jobstatus_dir"], "mapred-site": ["mapred.local.dir", "mapred.healthChecker.script.path"] }, "HISTORYSERVER": { "mapred-env": ["mapred_local_dir", "mapred_system_dir", "mapred_jobstatus_dir"], "mapred-site": ["mapred.local.dir", "mapred.healthChecker.script.path"] }, #MAPREDUCE2 "MAPREDUCE2_CLIENT": { "mapred-env": ["mapred_log_dir_prefix", "mapred_pid_dir_prefix"], "mapred-site": ["mapreduce.jobhistory.done-dir", "mapreduce.jobhistory.intermediate-done-dir"] }, #YARN "RESOURCEMANAGER": { "yarn-env": ["yarn_log_dir_prefix", "yarn_pid_dir_prefix", ] }, "NODEMANAGER": { "yarn-env": ["yarn_log_dir_prefix", "yarn_pid_dir_prefix", ], "yarn-site": ["yarn.nodemanager.log-dirs", "yarn.nodemanager.local-dirs", "yarn.nodemanager.log-dirs", "yarn.nodemanager.remote-app-log-dir"] }, "YARN_CLIENT": { "yarn-env": ["yarn_log_dir_prefix", "yarn_pid_dir_prefix", ] }, #ZOOKEEPER "ZOOKEEPER_SERVER": { "zookeeper-env": ["zk_data_dir", "zk_log_dir", "zk_pid_dir"] }, "ZOOKEEPER_CLIENT": { "zookeeper-env": ["zk_data_dir", "zk_log_dir", "zk_pid_dir"] }, #FLUME "FLUME_HANDLER": { "flume-env": ["flume_conf_dir", "flume_log_dir"] }, #GANGLIA "GANGLIA_MONITOR": { "ganglia-env": ["ganglia_conf_dir", "ganglia_runtime_dir"] }, "GANGLIA_SERVER": { "ganglia-env": ["ganglia_conf_dir", "ganglia_runtime_dir", "rrdcached_base_dir"] }, #HBASE "HBASE_MASTER": { "hbase-env": ["hbase_log_dir", "hbase_pid_dir"], "hbase-site": ["hbase.tmp.dir", "hbase.local.dir"] }, "HBASE_REGIONSERVER": { "hbase-env": ["hbase_log_dir", "hbase_pid_dir"], "hbase-site": ["hbase.tmp.dir", "hbase.local.dir"] }, "HBASE_CLIENT": { "hbase-env": ["hbase_log_dir", "hbase_pid_dir"], "hbase-site": ["hbase.tmp.dir", "hbase.local.dir"] }, #HIVE "HIVE_METASTORE": { "hive-env": ["hive_dbroot", "hive_log_dir", "hive_pid_dir"] }, "HIVE_SERVER": { "hive-env": ["hive_dbroot", "hive_log_dir", "hive_pid_dir"] }, "MYSQL_SERVER": { "hive-env": ["hive_dbroot", "hive_log_dir", "hive_pid_dir"] }, "HIVE_CLIENT": { "hive-env": ["hive_log_dir", "hive_pid_dir"] }, "HCAT": { "hive-env": ["hcat_log_dir", "hcat_pid_dir"] }, #OOZIE "OOZIE_SERVER": { "oozie-env": ["oozie_data_dir", "oozie_log_dir", "oozie_pid_dir"] }, #PIG - no directories to check #SQOOP - no directories to check #WEBHCAT - no directories to check #FALCON - no directories to check "FALCON_CLIENT": { "falcon-env": ["falcon_log_dir", "falcon_pid_dir", "falcon_local_dir", "falcon.embeddedmq.data"] }, "FALCON_SERVER": { "falcon-env": ["falcon_log_dir", "falcon_pid_dir", "falcon_local_dir", "falcon.embeddedmq.data"] } #STORM - no directories to check #TEZ - no directories to check } # Check if the usernames exists # - if they do - make sure they belong the correct group # - if not - check if new users can be created. USERS_TO_GROUP_MAPPING = { #HDFS "NAMENODE" : { "hadoop-env" : { "hdfs_user" : "user_group", "smokeuser" : "user_group", } }, "DATANODE" : { "hadoop-env" : { "hdfs_user" : "user_group", "smokeuser" : "user_group", } }, "SECONDARY_NAMENODE" : { "hadoop-env" : { "hdfs_user" : "user_group", "smokeuser" : "user_group", } }, "JOURNALNODE" : { "hadoop-env" : { "hdfs_user" : "user_group", "smokeuser" : "user_group", } }, "HDFS_CLIENT" : { "hadoop-env" : { "hdfs_user" : "user_group", "smokeuser" : "user_group", } }, #MAPREDUCE "JOBTRACKER": { "mapred-env": { "mapred_user" : "mapred_user" } }, "TASKTRACKER": { "mapred-env": { "mapred_user" : "mapred_user" } }, "MAPREDUCE_CLIENT": { "mapred-env": { "mapred_user" : "mapred_user" } }, "HISTORYSERVER": { "mapred-env": { "mapred_user" : "mapred_user" } }, #MAPREDUCE2 "MAPREDUCE2_CLIENT": { "mapred-env": { "mapred_user" : "mapred_user" } }, #YARN "RESOURCEMANAGER": { "yarn-env": { "yarn_user": "yarn_user" } }, "NODEMANAGER": { "yarn-env": { "yarn_user": "yarn_user" } }, "YARN_CLIENT": { "yarn-env": { "yarn_user": "yarn_user" } }, #ZOOKEEPER "ZOOKEEPER_SERVER": { "zookeeper-env": { "zk_user" : "zk_user" } }, "ZOOKEEPER_CLIENT": { "zookeeper-env": { "zk_user" : "zk_user" } }, #FLUME "FLUME_HANDLER": { "flume-env": { "flume_user": "flume_user" } }, #GANGLIA "GANGLIA_MONITOR": { "ganglia-env": { "gmond_user" : "gmond_user" } }, "GANGLIA_SERVER": { "ganglia-env": { "gmetad_user" : "gmetad_user" } }, #HBASE "HBASE_MASTER": { "hbase-env": { "hbase_user": "hbase_user" } }, "HBASE_REGIONSERVER": { "hbase-env": { "hbase_user": "hbase_user" } }, "HBASE_CLIENT": { "hbase-env": { "hbase_user": "hbase_user" } }, #HIVE "HIVE_METASTORE": { "hive-env": { "hive_user": "hive_user" } }, "HIVE_SERVER": { "hive-env": { "hive_user": "hive_user" } }, "MYSQL_SERVER": { "hive-env": { "hive_user": "hive_user" } }, "HIVE_CLIENT": { "hive-env": { "hive_user": "hive_user" } }, "HCAT": { "hive-env": { "hive_user": "hive_user" } }, #OOZIE "OOZIE_SERVER": { "oozie-env": { "oozie_user": "oozie_user" } }, #PIG - no users to check #SQOOP - no users to check #WEBHCAT - no users to check #FALCON "FALCON_CLIENT": { "falcon-env": { "falcon_user": "falcon_user" } }, "FALCON_SERVER": { "falcon-env": { "falcon_user": "falcon_user" } }, #STORM "NIMBUS": { "storm-env": { "storm_user": "storm_user" } }, "STORM_REST_API": { "storm-env": { "storm_user": "storm_user" } }, "SUPERVISOR": { "storm-env": { "storm_user": "storm_user" } }, "STORM_UI_SERVER": { "storm-env": { "storm_user": "storm_user" } }, "DRPC_SERVER": { "storm-env": { "storm_user": "storm_user" } }, #TEZ "TEZ_CLIENT": { "tez-env": { "tez_user": "tez_user" } } } class ValidateConfigs(Script): def actionexecute(self, env): config = Script.get_config() params = config['commandParams'] validation_passed = self.check_users(params) and self.check_directories(params) if validation_passed: print 'All configurations validated!' else: self.fail_with_error('Configurations validation failed!') def check_directories(self, params): validation_failed = False properties_to_check = self.flatten_dict(PROPERTIES_TO_CHECK) for property, value in params.items(): if property in properties_to_check: if self.dir_exists_or_not_empty_or_cant_be_created(self.get_value(property, params)): validation_failed = True return not validation_failed def check_users(self, params): validation_passed = True for user, group in self.dict_to_list(USERS_TO_GROUP_MAPPING).items(): if user in params and group in params: username = self.get_value(user, params) groupname = self.get_value(group, params) if not self.check_user_in_group(username, groupname): if os.geteuid() != 0: msg = 'Validation failed. ' + username + ' is not a member of ' \ + groupname + ' group and ' + username + ' account can\'t ' \ 'be created!\n' sys.stderr.write('Error: ' + msg) validation_passed = False return validation_passed def flatten_dict(self, dic, prefix=CONFIG_PARAM_PREFIX, separator=CONFIG_PARAM_SEPARATOR): result = [] for key, val in dic.items(): sum_key = prefix + separator + key if isinstance(val, dict): result += self.flatten_dict(val, sum_key, separator) else: for v in val: result.append(sum_key + separator + v) return result def dir_exists_or_not_empty_or_cant_be_created(self, filepath): if os.path.isdir(filepath) and os.access(filepath, os.W_OK) and os.listdir(filepath): msg = 'Validation failed. Directory ' + filepath \ + ' already exists and isn\'t empty!\n' sys.stderr.write('Error: ' + msg) return True elif not os.access(self.get_existed_subdir(filepath), os.W_OK): msg = 'Validation failed. Directory ' + filepath + ' can\'t be created!\n' sys.stderr.write('Error: ' + msg) return True return False def get_existed_subdir(self, path): if os.path.exists(path) and os.path.isdir(path): return path else: return self.get_existed_subdir(os.path.dirname(path)) def dict_to_list(self, dic, prefix=CONFIG_PARAM_PREFIX, separator=CONFIG_PARAM_SEPARATOR): result = {} for key, val in dic.items(): sum_key = prefix + separator + key if isinstance(val, dict): result.update(self.dict_to_list(val, sum_key, separator)) else: result[sum_key] = prefix + separator + val return result # username is a member of groupname or new account can be created def check_user_in_group(self, username, groupname): try: result = username == groupname or username in grp.getgrnam(groupname).gr_mem except KeyError: result = False return result # handle values like $(some.another.property.name} def get_value(self, key, params): result = params[key] pattern = re.compile("\$\{[^\}\$\x0020]+\}") for depth in range(0, MAX_SUBST - 1): match = pattern.search(result) if match: start = match.start() end = match.end() rx = re.compile(r'(.*/)(.+)') name = rx.sub(r'\g<1>' + result[start + 2 : end - 1], key) try: value = params[name] except KeyError: return result result = result[:start] + value + result[end:] else: break return result if __name__ == "__main__": ValidateConfigs().execute()