2 # Marta Carbone - UniPi
5 # This class requires the rpm package containing
6 # the picobsd image to be installed
7 # on the Central Site system.
14 from PLC.Faults import * # faults library
15 from PLC.Method import Method # base class for methods
16 from PLC.Parameter import Parameter # use the Parameter wrapper
17 from PLC.Auth import Auth # import the Auth parameter
18 from PLC.Nodes import * # nodes functions
19 from PLC.Methods.GetBootMedium import compute_key # key generation function
20 from PLC.Accessors.Accessors_dummynetbox import * # import dummynet accessors
22 WORK_DIR = "/var/tmp/DummynetBoxMedium"
23 BASE_IMAGE = "/usr/share/dummynet/picobsd"
25 class GetDummyBoxMedium(Method):
27 This method is used to get a boot image for the DummyNetBox
28 with its configuration file embedded.
30 We need to provide the dummybox_id of the DummyNetBox
32 Since every time a new configuration file will be generated,
33 THIS OPERATION WILL INVALIDATE ANY PREVIOUSLY DUMMYNETBOX BOOT MEDIUM.
35 Returns the iso image customized for the DummyNetBox with the new
36 key integrated in the image, and update the key fields in the database.
38 # I added the session role, because this method should be called from the web
39 roles = ['admin', 'pi', 'tech', 'session']
43 Parameter(int, "The dummybox_id"),
44 Parameter(str, "The image type (bin or iso)")
47 returns = Parameter(str, "DummynetBox boot medium")
49 # XXX add checks for picobsd.bin existence
51 # Generate a new configuration file in the working directory
52 # input parameters follows:
53 # self is used to access instance data,
54 # dummybox is the dummybox_id,
55 # new_key is the new generated key,
56 # configfile is the output file of the configuration.
57 def generate_conf_file(self, dummybox, new_key, configfile):
59 # Generate the dummynet box configuration file
60 today = datetime.date.today()
62 file += "# This is the dummynetbox configuration file\n"
63 file += "# and was generated on %s\n" % str(today)
65 host_domain = dummybox['hostname']
66 host_domain = host_domain.split('.', 1)
67 file += 'HOST_NAME="%s"\n' % host_domain[0]
68 file += 'DOMAIN_NAME="%s"\n' % host_domain[1]
70 file += 'IP_ADDRESS="%s"\n' % dummybox['ip']
71 file += 'IP_NETMASK="%s"\n' % dummybox['netmask']
72 file += 'IP_GATEWAY="%s"\n' % dummybox['gateway']
73 file += 'IP_DNS1="%s"\n' % dummybox['dns1']
74 file += 'IP_DNS2="%s"\n' % dummybox['dns2']
75 file += 'DUMMYBOX_ID="%s"\n' % dummybox['node_id']
76 file += 'DUMMYBOX_KEY="%s"\n' % new_key
78 file += 'CS_IP="%s"\n' % self.api.config.PLC_API_HOST
80 # write the configuration file
81 # WORK_DIR must be writable
82 FILE = open(configfile, "w")
88 # Here starts the execution of the call
89 def call(self, auth, dummybox_id, type):
91 # check for dummynet box existence and get dummyboxes information
92 dummybox_info = Nodes(self.api, {'node_id':dummybox_id, 'node_type':'dummynet'}, \
93 ['hostname', 'interface_ids'])
95 if dummybox_id != None and not dummybox_info:
96 raise PLCInvalidArgument, "No such DummyBox %s" % dummybox_id
98 # Get the dummynet box hostname
99 dummybox_hostname = dummybox_info[0]['hostname']
100 print "dummybox hostname %s" % dummybox_hostname
102 # get the node interface, if configured
103 interfaces = Interfaces(self.api, dummybox_info[0]['interface_ids'])
109 if not interface_info:
110 raise PLCInvalidArgument, "No primary network configured on %s" % dummybox_hostname
112 dummybox = interface_info
113 dummybox['hostname']=dummybox_hostname
115 # Select the base image, default to bin image
118 IMAGE_NAME = str(WORK_DIR) + "/dummybox_" + dummybox_hostname + str(type)
119 BASE_IMAGE = "/usr/share/dummynet/picobsd." + str(type)
120 configfile = WORK_DIR + '/dummybox.conf'
121 lockfile = WORK_DIR + '/lockfile'
124 assert self.caller is not None
126 # Start the generation of the image
128 new_key = compute_key()
130 # create working dir and lock file for concurrent runs
131 if not os.path.exists(WORK_DIR):
132 print "Creating working directory %s" % WORK_DIR
135 if os.path.exists(lockfile):
136 raise PLCInvalidArgument, "Lockfile %s exist, try again " % lockfile
138 print "Executing "+"touch %s" % lockfile
139 os.system("touch %s" % lockfile)
141 # generate the configuration file
142 conf_file = self.generate_conf_file(dummybox, new_key, configfile)
144 # build the shell script to customize the dummynetbox image
145 # copy the raw file and find the configuration file position
146 shell_script = "(cp %s %s; export MATCH=`grep -abo START_USER_DATA %s | cut -d: -f1`; " \
147 % (BASE_IMAGE, IMAGE_NAME, IMAGE_NAME)
149 # set permission file
150 shell_script += " chmod u+w %s; chmod u+w %s; " % (IMAGE_NAME, configfile)
152 # cat the configuration file in the raw image
153 shell_script += " cat %s | dd of=%s seek=$MATCH conv=notrunc bs=1)" \
154 % (configfile, IMAGE_NAME)
156 # check returned values, 0 means OK, remove the lock file
157 os.system(shell_script)
158 os.system("rm %s" % (lockfile))
160 # if all goes fine store the key in the database
161 dummybox['key'] = new_key
166 return base64.b64encode(file(IMAGE_NAME).read())