[3] | 1 | #!/usr/bin/env python |
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| 2 | |
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[5] | 3 | from xml.sax import make_parser |
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| 4 | from xml.sax.handler import ContentHandler |
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| 5 | import socket |
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| 6 | import sys |
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[3] | 7 | |
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[8] | 8 | # Specify debugging level here; |
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| 9 | # |
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| 10 | # >10 = metric XML |
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| 11 | # >9 = host,cluster,grid,ganglia XML |
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| 12 | # |
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| 13 | DEBUG_LEVEL = 9 |
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[6] | 14 | |
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[8] | 15 | """ |
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| 16 | This is TOrque-GAnglia's data Daemon |
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| 17 | """ |
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| 18 | |
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[6] | 19 | class GangliaXMLHandler( ContentHandler ): |
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[8] | 20 | "Parse Ganglia's XML" |
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[3] | 21 | |
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[6] | 22 | metrics = [ ] |
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| 23 | |
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| 24 | def startElement( self, name, attrs ): |
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[8] | 25 | "Store appropriate data from xml start tags" |
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[3] | 26 | |
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[7] | 27 | if name == 'GANGLIA_XML': |
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| 28 | self.XMLSource = attrs.get('SOURCE',"") |
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| 29 | self.gangliaVersion = attrs.get('VERSION',"") |
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[8] | 30 | if (DEBUG_LEVEL>9): print 'Found XML data: source %s version %s' %( self.XMLSource, self.gangliaVersion ) |
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[6] | 31 | |
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[7] | 32 | elif name == 'GRID': |
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| 33 | self.gridName = attrs.get('NAME',"") |
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[8] | 34 | if (DEBUG_LEVEL>9): print '`-Grid found: %s' %( self.gridName ) |
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[6] | 35 | |
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[7] | 36 | elif name == 'CLUSTER': |
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| 37 | self.clusterName = attrs.get('NAME',"") |
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[8] | 38 | if (DEBUG_LEVEL>9): print ' |-Cluster found: %s' %( self.clusterName ) |
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[6] | 39 | |
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[7] | 40 | elif name == 'HOST': |
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| 41 | self.hostName = attrs.get('NAME',"") |
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| 42 | self.hostIp = attrs.get('IP',"") |
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| 43 | self.hostReported = attrs.get('REPORTED',"") |
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[8] | 44 | if (DEBUG_LEVEL>9): print ' | |-Host found: %s - ip %s reported %s' %( self.hostName, self.hostIp, self.hostReported ) |
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[6] | 45 | |
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[7] | 46 | elif name == 'METRIC': |
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[6] | 47 | myMetric = { } |
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[7] | 48 | myMetric['name'] = attrs.get('NAME',"") |
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| 49 | myMetric['val'] = attrs.get('VAL',"") |
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[6] | 50 | |
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| 51 | self.metrics.append( myMetric ) |
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[8] | 52 | if (DEBUG_LEVEL>10): print ' | | |-metric: %s:%s' %( myMetric['name'], myMetric['val'] ) |
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[6] | 53 | |
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[5] | 54 | return |
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[3] | 55 | |
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[7] | 56 | #def endElement( self, name ): |
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| 57 | #if name == 'ganglia_xml': |
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[3] | 58 | |
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[7] | 59 | #if name == 'grid': |
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[3] | 60 | |
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[7] | 61 | #if name == 'cluster': |
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[6] | 62 | |
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[7] | 63 | #if name == 'host': |
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[6] | 64 | |
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| 65 | #if name == 'metric': |
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| 66 | |
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[5] | 67 | class GangliaXMLGatherer: |
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[8] | 68 | "Setup a connection and file object to Ganglia's XML" |
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[3] | 69 | |
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[8] | 70 | s = None |
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| 71 | |
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| 72 | def __init__( self, host, port ): |
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| 73 | "Store host and port for connection" |
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| 74 | |
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[5] | 75 | self.host = host |
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| 76 | self.port = port |
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[3] | 77 | |
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[8] | 78 | def __del__( self ): |
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| 79 | "Kill the socket before we leave" |
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| 80 | |
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| 81 | self.s.close() |
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| 82 | |
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| 83 | def getFileObject( self ): |
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| 84 | "Connect, and return a file object" |
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| 85 | |
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| 86 | for res in socket.getaddrinfo( self.host, self.port, socket.AF_UNSPEC, socket.SOCK_STREAM ): |
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[5] | 87 | af, socktype, proto, canonname, sa = res |
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| 88 | try: |
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[8] | 89 | self.s = socket.socket( af, socktype, proto ) |
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[5] | 90 | except socket.error, msg: |
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[8] | 91 | self.s = None |
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[5] | 92 | continue |
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| 93 | try: |
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[8] | 94 | self.s.connect( sa ) |
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[5] | 95 | except socket.error, msg: |
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[8] | 96 | self.s.close() |
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| 97 | self.s = None |
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[5] | 98 | continue |
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| 99 | break |
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[3] | 100 | |
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[8] | 101 | if self.s is None: |
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| 102 | print 'Could not open socket' |
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[5] | 103 | sys.exit(1) |
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| 104 | |
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[8] | 105 | return self.s.makefile( 'r' ) |
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[5] | 106 | |
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[8] | 107 | class GangliaXMLProcessor: |
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[5] | 108 | |
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[8] | 109 | def daemon(self): |
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| 110 | "Run as daemon forever" |
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[5] | 111 | |
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[8] | 112 | self.DAEMON = 1 |
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[5] | 113 | |
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[8] | 114 | # Fork the first child |
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| 115 | # |
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| 116 | pid = os.fork() |
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| 117 | if pid > 0: |
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| 118 | sys.exit(0) # end parrent |
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[7] | 119 | |
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[8] | 120 | # creates a session and sets the process group ID |
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| 121 | # |
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| 122 | os.setsid() |
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[7] | 123 | |
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[8] | 124 | # Fork the second child |
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| 125 | # |
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| 126 | pid = os.fork() |
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| 127 | if pid > 0: |
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| 128 | sys.exit(0) # end parrent |
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[5] | 129 | |
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[8] | 130 | # Go to the root directory and set the umask |
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| 131 | # |
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| 132 | os.chdir('/') |
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| 133 | os.umask(0) |
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| 134 | |
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| 135 | sys.stdin.close() |
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| 136 | sys.stdout.close() |
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| 137 | sys.stderr.close() |
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| 138 | |
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| 139 | os.open('/dev/null', 0) |
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| 140 | os.dup(0) |
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| 141 | os.dup(0) |
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| 142 | |
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| 143 | self.run() |
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| 144 | |
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| 145 | def run(self): |
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| 146 | "Main thread" |
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| 147 | |
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| 148 | while ( 1 ): |
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| 149 | self.processXML() |
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| 150 | time.sleep( 5 ) |
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| 151 | |
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| 152 | def processXML( self ): |
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| 153 | "Process XML" |
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| 154 | |
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| 155 | myXMLGatherer = GangliaXMLGatherer( 'localhost', 8651 ) |
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| 156 | |
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| 157 | myParser = make_parser() |
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| 158 | myHandler = GangliaXMLHandler() |
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| 159 | myParser.setContentHandler( myHandler ) |
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| 160 | |
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| 161 | myParser.parse( myXMLGatherer.getFileObject() ) |
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| 162 | |
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| 163 | def main(): |
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| 164 | "Program startup" |
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| 165 | |
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| 166 | myProcessor = GangliaXMLProcessor() |
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| 167 | myProcessor.processXML() |
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| 168 | |
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[5] | 169 | # Let's go |
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| 170 | main() |
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