source/steps/WriteNetworkConfig.py

   1 #!/usr/bin/python
   2 # $Id$
   3 #
   4 # Copyright (c) 2003 Intel Corporation
   5 # All rights reserved.
   6 #
   7 # Copyright (c) 2004-2006 The Trustees of Princeton University
   8 # All rights reserved.
   9 # expected /proc/partitions format
  10
  11 import os, string
  12 import traceback
  13
  14 import utils
  15 import urlparse
  16 import httplib
  17
  18 from Exceptions import *
  19 import BootServerRequest
  20 import ModelOptions
  21 import BootAPI
  22
  23 def Run( vars, log ):
  24     """
  25     Write out the network configuration for this machine:
  26     /etc/hosts
  27     /etc/sysconfig/network-scripts/ifcfg-<ifname>
  28     /etc/resolv.conf (if applicable)
  29     /etc/sysconfig/network
  30
  31     The values to be used for the network settings are to be set in vars
  32     in the variable 'INTERFACE_SETTINGS', which is a dictionary
  33     with keys:
  34
  35      Key               Used by this function
  36      -----------------------------------------------
  37      node_id
  38      node_key
  39      method            x
  40      ip                x
  41      mac               x (optional)
  42      gateway           x
  43      network           x
  44      broadcast         x
  45      netmask           x
  46      dns1              x
  47      dns2              x (optional)
  48      hostname          x
  49      domainname        x
  50
  51     Expect the following variables from the store:
  52     SYSIMG_PATH             the path where the system image will be mounted
  53                                 (always starts with TEMP_PATH)
  54     INTERFACES              All the interfaces associated with this node
  55     INTERFACE_SETTINGS      dictionary
  56     Sets the following variables:
  57     None
  58     """
  59
  60     log.write( "\n\nStep: Install: Writing Network Configuration files.\n" )
  61
  62     try:
  63         SYSIMG_PATH= vars["SYSIMG_PATH"]
  64         if SYSIMG_PATH == "":
  65             raise ValueError, "SYSIMG_PATH"
  66
  67     except KeyError, var:
  68         raise BootManagerException, "Missing variable in vars: %s\n" % var
  69     except ValueError, var:
  70         raise BootManagerException, "Variable in vars, shouldn't be: %s\n" % var
  71
  72
  73     try:
  74         INTERFACE_SETTINGS= vars['INTERFACE_SETTINGS']
  75     except KeyError, e:
  76         raise BootManagerException, "No interface settings found in vars."
  77
  78     try:
  79         hostname= INTERFACE_SETTINGS['hostname']
  80         domainname= INTERFACE_SETTINGS['domainname']
  81         method= INTERFACE_SETTINGS['method']
  82         ip= INTERFACE_SETTINGS['ip']
  83         gateway= INTERFACE_SETTINGS['gateway']
  84         network= INTERFACE_SETTINGS['network']
  85         netmask= INTERFACE_SETTINGS['netmask']
  86         dns1= INTERFACE_SETTINGS['dns1']
  87         mac= INTERFACE_SETTINGS['mac']
  88     except KeyError, e:
  89         raise BootManagerException, "Missing value %s in interface settings." % str(e)
  90
  91     # dns2 is not required to be set
  92     dns2 = INTERFACE_SETTINGS.get('dns2','')
  93
  94     # Node Manager needs at least PLC_API_HOST and PLC_BOOT_HOST
  95     log.write("Writing /etc/planetlab/plc_config\n")
  96     utils.makedirs("%s/etc/planetlab" % SYSIMG_PATH)
  97     plc_config = file("%s/etc/planetlab/plc_config" % SYSIMG_PATH, "w")
  98
  99     api_url = vars['BOOT_API_SERVER']
 100     (scheme, netloc, path, params, query, fragment) = urlparse.urlparse(api_url)
 101     parts = netloc.split(':')
 102     host = parts[0]
 103     if len(parts) > 1:
 104         port = parts[1]
 105     else:
 106         port = '80'
 107     try:
 108         log.write("getting via https://%s/PlanetLabConf/get_plc_config.php " % host)
 109         bootserver = httplib.HTTPSConnection(host, int(port))
 110         bootserver.connect()
 111         bootserver.request("GET","https://%s/PlanetLabConf/get_plc_config.php" % host)
 112         plc_config.write("%s" % bootserver.getresponse().read())
 113         bootserver.close()
 114         log.write("Done\n")
 115     except :
 116         log.write(" .. Failed.  Using old method. -- stack trace follows\n")
 117         traceback.print_exc(file=log.OutputFile)
 118         bs= BootServerRequest.BootServerRequest()
 119         if bs.BOOTSERVER_CERTS:
 120             print >> plc_config, "PLC_BOOT_HOST='%s'" % bs.BOOTSERVER_CERTS.keys()[0]
 121         print >> plc_config, "PLC_API_HOST='%s'" % host
 122         print >> plc_config, "PLC_API_PORT='%s'" % port
 123         print >> plc_config, "PLC_API_PATH='%s'" % path
 124
 125     plc_config.close()
 126
 127
 128     log.write( "Writing /etc/hosts\n" )
 129     hosts_file= file("%s/etc/hosts" % SYSIMG_PATH, "w" )
 130     hosts_file.write( "127.0.0.1       localhost\n" )
 131     if method == "static":
 132         hosts_file.write( "%s %s.%s\n" % (ip, hostname, domainname) )
 133     hosts_file.close()
 134     hosts_file= None
 135
 136
 137     if method == "static":
 138         log.write( "Writing /etc/resolv.conf\n" )
 139         resolv_file= file("%s/etc/resolv.conf" % SYSIMG_PATH, "w" )
 140         if dns1 != "":
 141             resolv_file.write( "nameserver %s\n" % dns1 )
 142         if dns2 != "":
 143             resolv_file.write( "nameserver %s\n" % dns2 )
 144         resolv_file.write( "search %s\n" % domainname )
 145         resolv_file.close()
 146         resolv_file= None
 147
 148     log.write( "Writing /etc/sysconfig/network\n" )
 149     network_file= file("%s/etc/sysconfig/network" % SYSIMG_PATH, "w" )
 150     network_file.write( "NETWORKING=yes\n" )
 151     network_file.write( "HOSTNAME=%s.%s\n" % (hostname, domainname) )
 152     if method == "static":
 153         network_file.write( "GATEWAY=%s\n" % gateway )
 154     network_file.close()
 155     network_file= None
 156
 157     interfaces = {}
 158     interface_count = 1
 159     for interface in vars['INTERFACES']:
 160         if method == "static" or method == "dhcp":
 161             if interface['is_primary'] == 1:
 162                 ifnum = 0
 163             else:
 164                 ifnum = interface_count
 165                 interface_count += 1
 166
 167             inter = {}
 168             if interface['mac']:
 169                 inter['HWADDR'] = interface['mac']
 170
 171             if interface['method'] == "static":
 172                 inter['BOOTPROTO'] = "static"
 173                 inter['IPADDR'] = interface['ip']
 174                 inter['NETMASK'] = interface['netmask']
 175
 176             elif interface['method'] == "dhcp":
 177                 inter['BOOTPROTO'] = "dhcp"
 178                 if interface['hostname']:
 179                     inter['DHCP_HOSTNAME'] = interface['hostname']
 180                 else:
 181                     inter['DHCP_HOSTNAME'] = hostname
 182                 if not interface['is_primary']:
 183                     inter['DHCLIENTARGS'] = "-R subnet-mask"
 184
 185             alias = ""
 186             ifname=None
 187             if len(interface['interface_tag_ids']) > 0:
 188                 tags =  BootAPI.call_api_function(vars, "GetInterfaceTags",
 189                                                   ({'interface_tag_id': interface['interface_tag_ids']},))
 190                 for tag in tags:
 191                     # to explicitly set interface name
 192                     if   tag['tagname'].upper() == "IFNAME":
 193                         ifname=tag['value']
 194                     elif tag['tagname'].upper() == "DRIVER":
 195                         # xxx not sure how to do that yet - probably add a line in modprobe.conf
 196                         pass
 197                     elif tag['tagname'].upper() == "ALIAS":
 198                         alias = ":" + tag['value']
 199
 200                     # a hack for testing before a new setting is hardcoded here
 201                     # use the backdoor tag and put as a value 'var=value'
 202                     elif tag['tagname'].upper() == "BACKDOOR":
 203                         [var,value]=tag['value'].split('=',1)
 204                         inter[var]=value
 205
 206                     elif tag['tagname'].lower() in \
 207                             [  "mode", "essid", "nw", "freq", "channel", "sens", "rate",
 208                                "key", "key1", "key2", "key3", "key4", "securitymode",
 209                                "iwconfig", "iwpriv" ] :
 210                         inter [tag['tagname'].upper()] = tag['value']
 211                         inter ['TYPE']='Wireless'
 212                     else:
 213                         log.write("Warning - ignored tag named %s\n"%tag['tagname'])
 214
 215             if alias and 'HWADDR' in inter:
 216                 for (dev, i) in interfaces.iteritems():
 217                     if i['HWADDR'] == inter['HWADDR']:
 218                         break
 219                 del inter['HWADDR']
 220                 interfaces[dev + alias] =inter
 221                 interface_count -= 1
 222             else:
 223                 if not ifname:
 224                     ifname="eth%d" % ifnum
 225                 else:
 226                     interface_count -= 1
 227                 interfaces[ifname] =inter
 228
 229     for (dev, inter) in interfaces.iteritems():
 230         path = "%s/etc/sysconfig/network-scripts/ifcfg-%s" % (
 231                SYSIMG_PATH, dev)
 232         f = file(path, "w")
 233         log.write("Writing %s\n" % path.replace(SYSIMG_PATH, ""))
 234
 235         f.write("DEVICE=%s\n" % dev)
 236         f.write("ONBOOT=yes\n")
 237         f.write("USERCTL=no\n")
 238         for (key, val) in inter.iteritems():
 239             f.write('%s="%s"\n' % (key, val))
 240
 241         f.close()
 242