7 from PLC.Faults import *
8 from PLC.Method import Method
9 from PLC.Parameter import Parameter, Mixed
10 from PLC.Auth import Auth
12 from PLC.Nodes import Node, Nodes
13 from PLC.Interfaces import Interface, Interfaces
14 from PLC.InterfaceSettings import InterfaceSetting, InterfaceSettings
15 from PLC.NodeTags import NodeTags
17 # could not define this in the class..
18 boot_medium_actions = [ 'node-preview',
27 # xxx used by GetDummyBoxMedium
29 # Generate 32 random bytes
30 bytes = random.sample(xrange(0, 256), 32)
31 # Base64 encode their string representation
32 key = base64.b64encode("".join(map(chr, bytes)))
33 # Boot Manager cannot handle = in the key
34 # XXX this sounds wrong, as it might prevent proper decoding
35 key = key.replace("=", "")
38 class GetBootMedium(Method):
40 This method is a redesign based on former, supposedly dedicated,
41 AdmGenerateNodeConfFile
43 As compared with its ancestor, this method provides a much more detailed
44 detailed interface, that allows to
45 (*) either just preview the node config file -- in which case
46 the node key is NOT recomputed, and NOT provided in the output
47 (*) or regenerate the node config file for storage on a floppy
48 that is, exactly what the ancestor method used todo,
49 including renewing the node's key
50 (*) or regenerate the config file and bundle it inside an ISO or USB image
51 (*) or just provide the generic ISO or USB boot images
52 in which case of course the node_id_or_hostname parameter is not used
54 action is expected among the following string constants
62 Apart for the preview mode, this method generates a new node key for the
63 specified node, effectively invalidating any old boot medium.
65 In addition, two return mechanisms are supported.
66 (*) The default behaviour is that the file's content is returned as a
67 base64-encoded string. This is how the ancestor method used to work.
68 To use this method, pass an empty string as the file parameter.
70 (*) Or, for efficiency -- this makes sense only when the API is used
71 by the web pages that run on the same host -- the caller may provide
72 a filename, in which case the resulting file is stored in that location instead.
73 The filename argument can use the following markers, that are expanded
75 - %d : default root dir (some builtin dedicated area under /var/tmp/)
76 Using this is recommended, and enforced for non-admin users
77 - %n : the node's name when this makes sense, or a mktemp-like name when
78 generic media is requested
79 - %s : a file suffix appropriate in the context (.txt, .iso or the like)
80 - %v : the bootcd version string (e.g. 4.0)
84 With the file-based return mechanism, the method returns the full pathname
87 It is the caller's responsability to remove this file after use.
89 Options: an optional array of keywords.
90 options are not supported for generic images
91 Currently supported are
92 - 'partition' - for USB actions only
94 - 'serial' or 'serial:<console_spec>'
95 console_spec (or 'default') is passed as-is to bootcd/build.sh
96 it is expected to be a colon separated string denoting
97 tty - baudrate - parity - bits
101 - Non-admins can only generate files for nodes at their sites.
102 - Non-admins, when they provide a filename, *must* specify it in the %d area
105 Whenever needed, the method stores intermediate files in a
106 private area, typically not located under the web server's
107 accessible area, and are cleaned up by the method.
111 roles = ['admin', 'pi', 'tech']
115 Mixed(Node.fields['node_id'],
116 Node.fields['hostname']),
117 Parameter (str, "Action mode, expected in " + "|".join(boot_medium_actions)),
118 Parameter (str, "Empty string for verbatim result, resulting file full path otherwise"),
119 Parameter ([str], "Options"),
122 returns = Parameter(str, "Node boot medium, either inlined, or filename, depending on the filename parameter")
124 BOOTCDDIR = "/usr/share/bootcd-@NODEFAMILY@/"
125 BOOTCDBUILD = "/usr/share/bootcd-@NODEFAMILY@/build.sh"
126 GENERICDIR = "/var/www/html/download-@NODEFAMILY@/"
127 WORKDIR = "/var/tmp/bootmedium"
129 # uncomment this to preserve temporary area and bootcustom logs
132 ### returns (host, domain) :
133 # 'host' : host part of the hostname
134 # 'domain' : domain part of the hostname
135 def split_hostname (self, node):
136 # Split hostname into host and domain parts
137 parts = node['hostname'].split(".", 1)
139 raise PLCInvalidArgument, "Node hostname %s is invalid"%node['hostname']
143 def floppy_contents (self, node, renew_key):
145 if node['peer_id'] is not None:
146 raise PLCInvalidArgument, "Not a local node"
148 # If we are not an admin, make sure that the caller is a
149 # member of the site at which the node is located.
150 if 'admin' not in self.caller['roles']:
151 if node['site_id'] not in self.caller['site_ids']:
152 raise PLCPermissionDenied, "Not allowed to generate a configuration file for %s"%node['hostname']
154 # Get node networks for this node
156 interfaces = Interfaces(self.api, node['interface_ids'])
157 for interface in interfaces:
158 if interface['is_primary']:
162 raise PLCInvalidArgument, "No primary network configured on %s"%node['hostname']
164 ( host, domain ) = self.split_hostname (node)
167 node['key'] = compute_key()
171 # Generate node configuration file suitable for BootCD
175 file += 'NODE_ID="%d"\n' % node['node_id']
176 file += 'NODE_KEY="%s"\n' % node['key']
179 file += 'NET_DEVICE="%s"\n' % primary['mac'].lower()
181 file += 'IP_METHOD="%s"\n' % primary['method']
183 if primary['method'] == 'static':
184 file += 'IP_ADDRESS="%s"\n' % primary['ip']
185 file += 'IP_GATEWAY="%s"\n' % primary['gateway']
186 file += 'IP_NETMASK="%s"\n' % primary['netmask']
187 file += 'IP_NETADDR="%s"\n' % primary['network']
188 file += 'IP_BROADCASTADDR="%s"\n' % primary['broadcast']
189 file += 'IP_DNS1="%s"\n' % primary['dns1']
190 file += 'IP_DNS2="%s"\n' % (primary['dns2'] or "")
192 file += 'HOST_NAME="%s"\n' % host
193 file += 'DOMAIN_NAME="%s"\n' % domain
195 # define various interface settings attached to the primary interface
196 settings = InterfaceSettings (self.api, {'interface_id':interface['interface_id']})
199 for setting in settings:
200 if setting['category'] is not None:
201 categories.add(setting['category'])
203 for category in categories:
204 category_settings = InterfaceSettings(self.api,{'interface_id':interface['interface_id'],
205 'category':category})
206 if category_settings:
207 file += '### Category : %s\n'%category
208 for setting in category_settings:
209 file += '%s_%s="%s"\n'%(category.upper(),setting['name'].upper(),setting['value'])
211 for interface in interfaces:
212 if interface['method'] == 'ipmi':
213 file += 'IPMI_ADDRESS="%s"\n' % interface['ip']
215 file += 'IPMI_MAC="%s"\n' % interface['mac'].lower()
220 # see also InstallBootstrapFS in bootmanager that does similar things
221 def get_nodefamily (self, node):
222 # get defaults from the myplc build
224 (pldistro,arch) = file("/etc/planetlab/nodefamily").read().strip().split("-")
226 (pldistro,arch) = ("planetlab","i386")
228 # with no valid argument, return system-wide defaults
230 return (pldistro,arch)
232 node_id=node['node_id']
233 # cannot use accessors in the API itself
234 # the 'arch' tag type is assumed to exist, see db-config
235 arch_tags = NodeTags (self.api, {'tagname':'arch','node_id':node_id},['tagvalue'])
237 arch=arch_tags[0]['tagvalue']
239 pldistro_tags = NodeTags (self.api, {'tagname':'pldistro','node_id':node_id},['tagvalue'])
241 pldistro=pldistro_tags[0]['tagvalue']
243 return (pldistro,arch)
245 def bootcd_version (self):
247 return file(self.BOOTCDDIR + "/build/version.txt").readline().strip()
249 raise Exception,"Unknown boot cd version - probably wrong bootcd dir : %s"%self.BOOTCDDIR
251 def cleantrash (self):
252 for file in self.trash:
254 print 'DEBUG -- preserving',file
258 def call(self, auth, node_id_or_hostname, action, filename, options = []):
262 if action not in boot_medium_actions:
263 raise PLCInvalidArgument, "Unknown action %s"%action
265 ### compute file suffix and type
266 if action.find("-iso") >= 0 :
269 elif action.find("-usb") >= 0:
276 # handle / caconicalize options
279 raise PLCInvalidArgument, "Options are not supported for node configs"
281 # create a dict for build.sh
283 for option in options:
284 if option == "cramfs":
285 optdict['cramfs']=True
286 elif option == 'partition':
288 raise PLCInvalidArgument, "option 'partition' is for USB images only"
291 elif option == "serial":
292 optdict['serial']='default'
293 elif option.find("serial:") == 0:
294 optdict['serial']=option.replace("serial:","")
296 raise PLCInvalidArgument, "unknown option %s"%option
298 ### check node if needed
299 if action.find("node-") == 0:
300 nodes = Nodes(self.api, [node_id_or_hostname])
302 raise PLCInvalidArgument, "No such node %r"%node_id_or_hostname
304 nodename = node['hostname']
308 # compute a 8 bytes random number
309 tempbytes = random.sample (xrange(0,256), 8);
310 def hexa2 (c): return chr((c>>4)+65) + chr ((c&16)+65)
311 nodename = "".join(map(hexa2,tempbytes))
314 (pldistro,arch) = self.get_nodefamily(node)
315 self.nodefamily="%s-%s"%(pldistro,arch)
317 for attr in [ "BOOTCDDIR", "BOOTCDBUILD", "GENERICDIR" ]:
318 setattr(self,attr,getattr(self,attr).replace("@NODEFAMILY@",self.nodefamily))
321 # allow to set filename to None or any other empty value
322 if not filename: filename=''
323 filename = filename.replace ("%d",self.WORKDIR)
324 filename = filename.replace ("%n",nodename)
325 filename = filename.replace ("%s",suffix)
326 filename = filename.replace ("%p",self.api.config.PLC_NAME)
328 try: filename = filename.replace ("%f", self.nodefamily)
330 try: filename = filename.replace ("%a", arch)
332 try: filename = filename.replace ("%v",self.bootcd_version())
335 ### Check filename location
337 if 'admin' not in self.caller['roles']:
338 if ( filename.index(self.WORKDIR) != 0):
339 raise PLCInvalidArgument, "File %s not under %s"%(filename,self.WORKDIR)
341 ### output should not exist (concurrent runs ..)
342 if os.path.exists(filename):
343 raise PLCInvalidArgument, "Resulting file %s already exists"%filename
345 ### we can now safely create the file,
346 ### either we are admin or under a controlled location
347 filedir=os.path.dirname(filename)
348 # dirname does not return "." for a local filename like its shell counterpart
350 if not os.path.exists(filedir):
352 os.makedirs (filedir,0777)
354 raise PLCPermissionDenied, "Could not create dir %s"%filedir
358 if action == 'generic-iso' or action == 'generic-usb':
360 raise PLCInvalidArgument, "Options are not supported for generic images"
361 # this raises an exception if bootcd is missing
362 version = self.bootcd_version()
363 generic_name = "%s-BootCD-%s%s"%(self.api.config.PLC_NAME,
366 generic_path = "%s/%s" % (self.GENERICDIR,generic_name)
369 ret=os.system ("cp %s %s"%(generic_path,filename))
373 raise PLCPermissionDenied, "Could not copy %s into"%(generic_path,filename)
375 ### return the generic medium content as-is, just base64 encoded
376 return base64.b64encode(file(generic_path).read())
378 ### config file preview or regenerated
379 if action == 'node-preview' or action == 'node-floppy':
380 renew_key = (action == 'node-floppy')
381 floppy = self.floppy_contents (node,renew_key)
384 file(filename,'w').write(floppy)
386 raise PLCPermissionDenied, "Could not write into %s"%filename
391 ### we're left with node-iso and node-usb
392 if action == 'node-iso' or action == 'node-usb':
394 ### check we've got required material
395 version = self.bootcd_version()
397 if not os.path.isfile(self.BOOTCDBUILD):
398 raise PLCAPIError, "Cannot locate bootcd/build.sh script %s"%self.BOOTCDBUILD
400 # create the workdir if needed
401 if not os.path.isdir(self.WORKDIR):
403 os.makedirs(self.WORKDIR,0777)
404 os.chmod(self.WORKDIR,0777)
406 raise PLCPermissionDenied, "Could not create dir %s"%self.WORKDIR
409 # generate floppy config
410 floppy_text = self.floppy_contents(node,True)
412 floppy_file = "%s/%s.txt"%(self.WORKDIR,nodename)
414 file(floppy_file,"w").write(floppy_text)
416 raise PLCPermissionDenied, "Could not write into %s"%floppy_file
418 self.trash.append(floppy_file)
420 node_image = "%s/%s%s"%(self.WORKDIR,nodename,suffix)
422 # make build's arguments
424 if "cramfs" in optdict: type += "_cramfs"
425 if "serial" in optdict: serial_arg = "-s %s"%optdict['serial']
426 log_file="%s.log"%node_image
428 build_command = '%s -f "%s" -o "%s" -t "%s" %s &> %s' % (self.BOOTCDBUILD,
435 print 'build command:',build_command
436 ret=os.system(build_command)
438 raise PLCAPIError,"bootcd/build.sh failed\n%s\n%s"%(
439 build_command,file(log_file).read())
441 self.trash.append(log_file)
442 if not os.path.isfile (node_image):
443 raise PLCAPIError,"Unexpected location of build.sh output - %s"%node_image
447 ret=os.system("mv %s %s"%(node_image,filename))
449 self.trash.append(node_image)
451 raise PLCAPIError, "Could not move node image %s into %s"%(node_image,filename)
455 result = file(node_image).read()
456 self.trash.append(node_image)
458 return base64.b64encode(result)
463 # we're done here, or we missed something
464 raise PLCAPIError,'Unhandled action %s'%action