plugins/drl.py

   1 #!/usr/bin/python
   2
   3 """ DRL configurator.  """
   4
   5 import os
   6 import shutil
   7
   8 import logger
   9 import tools
  10
  11
  12 drl = """<?xml version="1.0" encoding="UTF-8"?>
  13 <!-- %s -->
  14 <drl>
  15     <machine id="%d" limit="%d" commfabric="MESH" accounting="STANDARD" ewma="0.1" htb_node="100" htb_parent="10">
  16
  17 %s
  18     </machine>
  19 </drl>"""
  20
  21 def start(options, conf):
  22         logger.log('drl plugin starting up...')
  23
  24
  25 def DRLSetup(site_name, slice_name, site_id, bw_limit, peer):
  26         DRL_file = '/vservers/%s/etc/drl.xml' % slice_name
  27         DRL_config = drl % (site_name, site_id, bw_limit, peer)
  28
  29         # Check config changes
  30         if os.path.exists(DRL_file):
  31                 import md5
  32                 new_digest = md5.new(DRL_config).digest()
  33                 old_digest = md5.new(open(DRL_file).read()).digest()
  34                 if old_digest == new_digest:
  35                         logger.log('drl: %s already exists...' % DRL_file)
  36                         DRLInstall(slice_name)
  37                         return
  38         DRLConfig(DRL_file, DRL_config)
  39         DRLInstall(slice_name)
  40
  41
  42 def DRLConfig(DRL_file, DRL_config):
  43         logger.log('drl: %s is out-dated...' % DRL_file)
  44         logger.log('drl: generating %s' % DRL_file)
  45         f = open( DRL_file, 'w')
  46         f.write(DRL_config)
  47         f.close()
  48
  49
  50 def DRLInstall(slice_name):
  51         if not os.path.exists('/vservers/%s/etc/yum.repos.d/myplc.repo' % slice_name):
  52                 shutil.copyfile('/etc/yum.myplc.d/myplc.repo', '/vservers/%s/etc/yum.repos.d/myplc.repo' % slice_name)
  53                 logger.log('drl: installing DistributedRateLimiting into %s slice' % slice_name)
  54                 logger.log_call('vserver', '%s' % slice_name, 'suexec', '0', 'yum', 'install', '-y', '-q', 'DistributedRateLimiting')
  55                 logger.log_call('vserver', '%s' % slice_name, 'suexec', '0', 'chkconfig', '--add', 'ulogd')
  56         else:
  57                 logger.log('drl: installing DistributedRateLimiting into %s slice' % slice_name)
  58                 logger.log_call('vserver', '%s' % slice_name, 'suexec', '0', 'yum', 'update', '-y', '-q', 'DistributedRateLimiting')
  59
  60         logger.log('drl: (re)starting DistributedRateLimiting service')
  61         logger.log_call('vserver', '%s' % slice_name, 'suexec', '0', 'service', 'ulogd', 'restart')
  62
  63
  64 def GetSlivers(data, conf = None, plc = None):
  65         DRL_SLICE_NAME = ''
  66         HAVE_DRL = 0
  67         node_id = tools.node_id()
  68
  69         for sliver in data['slivers']:
  70                 for attribute in sliver['attributes']:
  71                         tag = attribute['tagname']
  72                         value = attribute['value']
  73                         if tag == 'drl' and value == '1':
  74                                 HAVE_DRL = 1
  75                                 DRL_SLICE_NAME = sliver['name']
  76
  77         if HAVE_DRL:
  78                 site_id = plc.GetNodes({'node_id': int(node_id) }, ['site_id'])
  79                 site_id = site_id[0]['site_id']
  80
  81                 q = plc.GetSites({'site_id': site_id, 'enabled': True, 'peer_site_id': None}, ['name', 'node_ids'])
  82                 for i in q:
  83                         if i['node_ids'] != [] and len(i['node_ids']) > 1:
  84                                 z = plc.GetNodeNetworks({'node_id': i['node_ids'], 'is_primary': True, '~bwlimit': None}, ['node_id', 'ip', 'bwlimit'])
  85                                 total_bwlimit = 0
  86                                 peer = ''
  87                                 node_has_bwlimit = 0
  88                                 for j in range(len(z)):
  89                                         total_bwlimit +=  z[j]['bwlimit']
  90                                         if z[j]['node_id'] != int(node_id):
  91                                                 peer += '\t<peer>%s</peer>\n' % z[j]['ip']
  92                                         else:
  93                                                 node_has_bwlimit = 1
  94                                 if node_has_bwlimit:
  95                                         DRLSetup(i['name'], DRL_SLICE_NAME, site_id, total_bwlimit/1000, peer)
  96                                 else:
  97                                         logger.log('drl: This node has no bwlimit')
  98
  99                         else:
 100                                 logger.log('drl: This site has only %s node' % len(i['node_ids']))
 101         else:
 102                 logger.log('drl: This node has no drl slice!...')