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  • Committer: Antonio Rosales
  • Date: 2015-02-24 17:36:21 UTC
  • Revision ID: antonio.rosales@canonical.com-20150224173621-axjdwc682g82rdom
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hooks/namenode-relation-changed
 
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#!/usr/bin/python
 
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import os
 
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import sys
 
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import subprocess
 
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from charmhelpers.core.hookenv import relation_get
 
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from bdutils import fileLineSearchReplace, fconfigured
 
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from common import hue_ini, restart_hue
 
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sys.path.insert(0, os.path.join(os.environ['CHARM_DIR'], 'lib'))
 
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from charmhelpers.core import (
 
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    hookenv,
 
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    host,
 
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)
 
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hooks = hookenv.Hooks()
 
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log = hookenv.log
 
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SERVICE = 'apache-hue'
 
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@hooks.hook('namenode-relation-changed')
 
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def namenode_relation_changed():
 
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    import time
 
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    ready  = relation_get("ready")
 
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    if ready != "true":
 
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        log ("Hue  ==> namenide not ready","INFO")
 
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        sys.exit(0)
 
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    # do nothing if namenode connection is configured 
 
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    if fconfigured("hadoop_nn"):
 
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        return    
 
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    log('hue ==> namenode-relation-changed')
 
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    namenodeIP = relation_get('private-address')
 
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    log("hue ==> namenode_IP={}".format(namenodeIP),"INFO")
 
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    namenode = namenodeIP+":8020"
 
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    fileLineSearchReplace(hue_ini, "fs_defaultfs=hdfs://localhost:8020", \
 
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                          "fs_defaultfs=hdfs://"+namenode)
 
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    fileLineSearchReplace(hue_ini, "## webhdfs_url=http://localhost:50070/webhdfs/v1",\
 
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                          "webhdfs_url=http://"+namenodeIP+":50070/webhdfs/v1")
 
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    restart_hue()
 
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if __name__ == "__main__":
 
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    # execute a hook based on the name the program is called by
 
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    hooks.execute(sys.argv)