1 """Codemux configurator. Monitors slice attributes and configures CoDemux to mux port 80 based on HOST field in HTTP request. Forwards to localhost port belonging to configured slice."""
6 from config import Config
8 CODEMUXCONF="/etc/codemux/codemux.conf"
11 logger.log("codemux: plugin starting up...")
13 def GetSlivers(data, config, plc = None):
15 For each sliver with the codemux attribute, parse out "host,port"
16 and make entry in conf. Restart service after.
18 if 'OVERRIDES' in dir(config):
19 if config.OVERRIDES.get('codemux') == '-1':
20 logger.log("codemux: Disabled", 2)
24 logger.log("codemux: Starting.", 2)
25 # slices already in conf
26 slicesinconf = parseConf()
27 # slices that need to be written to the conf
30 # XXX Hack for planetflow
31 if slicesinconf.has_key("root"): _writeconf = False
32 else: _writeconf = True
34 # Parse attributes and update dict of scripts
35 if 'slivers' not in data:
36 logger.log_missing_data("codemux.GetSlivers", 'slivers')
38 for sliver in data['slivers']:
39 for attribute in sliver['attributes']:
40 if attribute['tagname'] == 'codemux':
41 # add to conf. Attribute is [host, port]
42 parts = attribute['value'].split(",")
44 logger.log("codemux: attribute value (%s) for codemux not separated by comma. Skipping."%attribute['value'])
50 params = {'host': parts[0], 'port': parts[1], 'ip': ip}
53 # Check to see if sliver is running. If not, continue
54 if vserver.VServer(sliver['name']).is_running():
55 # Check if new or needs updating
56 if (sliver['name'] not in slicesinconf.keys()) \
57 or (params not in slicesinconf.get(sliver['name'], [])):
58 logger.log("codemux: Updating slice %s using %s" % \
59 (sliver['name'], params['host']))
62 # Add to dict of codemuxslices. Make list to support more than one
63 # codemuxed host per slice.
64 codemuxslices.setdefault(sliver['name'],[])
65 codemuxslices[sliver['name']].append(params)
67 logger.log("codemux: sliver %s not running yet. Deferring."\
71 # Remove slices from conf that no longer have the attribute
72 for deadslice in set(slicesinconf.keys()) - set(codemuxslices.keys()):
73 # XXX Hack for root slice
74 if deadslice != "root":
75 logger.log("codemux: Removing %s" % deadslice)
78 if _writeconf: writeConf(sortDomains(codemuxslices))
79 # ensure the service is running
83 def writeConf(slivers, conf = CODEMUXCONF):
84 '''Write conf with default entry up top. Elements in [] should have lower order domain names first. Restart service.'''
86 # This needs to be the first entry...
88 f.write("* root 1080 %s\n" % Config().PLC_PLANETFLOW_HOST)
89 except AttributeError:
90 logger.log("codemux: Can't find PLC_CONFIG_HOST in config. Using PLC_API_HOST")
91 f.write("* root 1080 %s\n" % Config().PLC_API_HOST)
92 # Sort items for like domains
93 for mapping in slivers:
94 for (host, params) in mapping.iteritems():
95 if params['slice'] == "root": continue
96 f.write("%s %s %s %s\n" % (host, params['slice'], params['port'], params['ip']))
100 except: logger.log_exc("codemux.writeConf failed to restart service")
103 def sortDomains(slivers):
104 '''Given a dict of {slice: {domainname, port}}, return array of slivers with lower order domains first'''
105 dnames = {} # {host: slice}
106 for (slice, params) in slivers.iteritems():
107 for mapping in params:
108 dnames[mapping['host']] = {"slice":slice, "port": mapping['port'], "ip": mapping['ip']}
109 hosts = dnames.keys()
111 hosts.sort(key=str.__len__)
114 # make list of slivers
116 for host in hosts: sortedslices.append({host: dnames[host]})
121 def parseConf(conf = CODEMUXCONF):
122 '''Parse the CODEMUXCONF and return dict of slices in conf. {slice: (host,port)}'''
123 slicesinconf = {} # default
126 for line in f.readlines():
127 if line.startswith("#") \
128 or (len(line.split()) > 4) \
129 or (len(line.split()) < 3):
131 (host, slice, port) = line.split()[:3]
132 logger.log("codemux: found %s in conf" % slice, 2)
133 slicesinconf.setdefault(slice, [])
134 slicesinconf[slice].append({"host": host, "port": port})
136 except IOError: logger.log_exc("codemux.parseConf got IOError")
141 if len(os.popen("pidof codemux").readline().rstrip("\n")) > 0:
146 def restartService():
147 if not os.path.exists("/etc/init.d/codemux"): return
148 logger.log("codemux: Restarting codemux service")
150 logger.log_call(["/etc/init.d/codemux","condrestart", ])
152 logger.log_call(["/etc/init.d/codemux","restart", ])
155 if not os.path.exists("/etc/init.d/codemux"): return
157 logger.log("codemux: Starting codemux service")
158 logger.log_call(["/etc/init.d/codemux", "start", ])
159 logger.log_call(["/sbin/chkconfig", "codemux", "on"])
163 if not os.path.exists("/etc/init.d/codemux"): return
165 logger.log("codemux: Stopping codemux service")
166 logger.log_call(["/etc/init.d/codemux", "stop", ])
167 logger.log_call(["/sbin/chkconfig", "codemux", "off"])