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From dlyle65535 <...@git.apache.org>
Subject [GitHub] incubator-metron pull request #518: METRON-799: The MPack should function in...
Date Fri, 07 Apr 2017 13:22:48 GMT
Github user dlyle65535 commented on a diff in the pull request:

    https://github.com/apache/incubator-metron/pull/518#discussion_r110387708
  
    --- Diff: metron-deployment/packaging/ambari/metron-mpack/src/main/resources/common-services/METRON/CURRENT/package/scripts/metron_security.py
---
    @@ -0,0 +1,74 @@
    +"""
    +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.
    +"""
    +
    +import os.path
    +from resource_management.core.source import Template
    +from resource_management.core.resources.system import Directory, File
    +from resource_management.core import global_lock
    +from resource_management.core.logger import Logger
    +from resource_management.core.resources.system import Execute
    +from resource_management.libraries.functions import format as ambari_format
    +
    +
    +# Convenience function for ensuring home dirs are setup consistently.
    +def storm_security_setup(params):
    +    if params.security_enabled:
    +        # I don't think there's an Ambari way to get a user's local home dir , so have
Python perform tilde expansion.
    +        # Ambari's Directory doesn't do tilde expansion.
    +        metron_storm_dir_tilde = '~' + params.metron_user + '/.storm'
    +        metron_storm_dir = os.path.expanduser(metron_storm_dir_tilde)
    +        Directory(metron_storm_dir,
    +                  mode=0755,
    +                  owner=params.metron_user,
    +                  group=params.metron_group
    +                  )
    +
    +        File(ambari_format('{client_jaas_path}'),
    +             content=Template('client_jaas.conf.j2'),
    +             owner=params.metron_user,
    +             group=params.metron_group,
    +             mode=0755
    +             )
    +
    +        File(metron_storm_dir + '/storm.yaml',
    +             content=Template('storm.yaml.j2'),
    +             owner=params.metron_user,
    +             group=params.metron_group,
    +             mode=0755
    +             )
    +
    --- End diff --
    
    So, if we switch on HA Storm after Metron kerberization, there's an issue?
    
    I'm a bit uncomfortable with all the all the additional management required to use AutoTGT
rather than Auto[HDFS|HBase]TGT. I didn't deliberately choose those two when I started (I
just happened to land on those docs first), but that seems less complex than what we're currently
doing. Are there benefits I'm missing? Because managing a jaas file and storm.yaml from outside
of the Ambari Storm Service seems to add difficulty and risk.


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