xentaur
view xentaur.py @ 29:87f19c6d1514
redrawing bridge state
| author | igor |
|---|---|
| date | Fri Sep 21 21:29:28 2007 +0300 (2007-09-21) |
| parents | d22ff6f55dc5 |
| children | 532f2ed25f70 |
line source
1 #!/usr/bin/python
4 import sys,os,time
5 import xenomips_vars
6 xenomips_vars.N='1'
7 sys.path.append('/etc/xen')
9 xen_config_name='fabergeN'
10 exec 'from '+xen_config_name+' import bridges,vbridges_table, hidden_bridges, domains, broken_links, temporary_links, domain_types'
12 bridges_turned_down=[]
14 from IPython.Shell import IPShellEmbed
17 screenrc=os.environ['HOME']+"/.screenrc_xentaur"
19 def run(program, *args):
20 pid = os.fork()
21 if not pid:
22 os.execvp(program, (program,) + args)
23 return os.wait()[0]
25 def run_command(line):
26 #cmds=line.split()
27 #run(cmds[0],*cmds[1:])
28 run("/bin/sh", "-c", line)
30 def run_command_return_stdout(line):
31 p = os.popen(line)
32 output = p.read()
33 p.close()
34 return output
36 def create_bridges_script():
37 unbound_bridges=bridges
38 create_unbound_bridges="\n".join(map(lambda x: "sudo /usr/sbin/brctl show | awk '{print $1}' | grep -q "+x+" || sudo /usr/sbin/brctl addbr "+x, unbound_bridges))
39 create_unbound_bridges+="\n"+"\n".join(map(lambda x: "sudo /bin/ip link set "+x+" up", unbound_bridges))
41 print """#!/bin/sh
42 # create unbound bridges
43 %(create_unbound_bridges)s
44 """ % {'create_unbound_bridges' : create_unbound_bridges}
47 def create_domains_script():
48 for N in range(len(domains)):
49 print "sudo /usr/sbin/xm create "+xen_config_name+" N="+str(N)+" && sleep 1 && sudo /usr/sbin/xm sched-credit -d $(sudo /usr/sbin/xm list | grep "+domains[N]+" | awk '{print $2}') -c 10 && sleep 1"
51 def destroy_domains_script():
52 for N in range(len(domains)):
53 print "sudo /usr/sbin/xm shutdown "+domains[N]
55 def create_screens_script():
57 N=1
58 screens=[]
59 for domain in domains:
60 screens.append("screen -t "+domain+" "+str(N)+" sh -c 'while true; do sudo xm console "+domain+" ; echo Retrying in 5 seconds...; sleep 5; done'")
61 N+=1
62 screenlist="\n".join(screens)
64 #
65 # Previous terminal acccess commands:
66 # ip="192.168.80."+str(200+N)
67 # screens.append("screen -t "+domain+" "+str(N)+" sh -c 'while true; do ssh root@"+ip+" ; done'")
68 #
70 #hardstatus string "\%{gk}\%c \%{yk}\%M\%d \%{wk}\%?\%-Lw\%?\%{bw}\%n*\%f\%t\%?(\%u)\%?\%{wk}\%?\%+Lw\%?"
72 f=open(screenrc, "w");
73 f.write("""
74 hardstatus on
75 hardstatus alwayslastline
77 screen -t console 0 bash
78 %s
79 """ % (screenlist))
80 f.close()
82 def graph_node(node):
83 i=0
84 domain_type={}
85 for domain in domains:
86 domain_type[domain]=domain_types[i]
87 i+=1
88 return node+" [label=\" "+node+"\",shapefile=\"shapes/all/"+domain_type[node]+".png\",fontcolor=navy,fontsize=14]"
90 def graph_bridge(bridge):
91 if bridge in hidden_bridges:
92 return ""
93 if bridge in bridges_turned_down:
94 return "%s [shape=none,shapefile=\"shapes/all/switch_turned_down.png\"]" % (bridge)
95 else:
96 return "%s [shape=none,shapefile=\"shapes/all/switch.png\"]" % (bridge)
99 def graph():
100 nodelist=""
101 bridgelist=""
102 linklist=""
103 physicallist=""
104 networklist=""
106 nodelist=";\n ".join(map(graph_node,nodes))
107 if nodelist: nodelist += ";"
109 bridgelist=";\n ".join(map(graph_bridge,bridges))
110 if bridgelist: bridgelist += ";"
112 links=[]
113 for host, bridges_raw in vbridges_table.iteritems():
114 i=0
115 for this_bridge in bridges_raw:
116 if this_bridge in hidden_bridges or not this_bridge:
117 continue
118 if not [ host, bridges_raw.index(this_bridge), this_bridge ] in temporary_links:
119 links.append(host+" -- "+this_bridge+" [taillabel=\"fa"+str(bridges_raw.index(this_bridge))+"/0\"]")
120 i+=1
121 # if [ host, this_bridge ] in broken_links:
122 # links.append(host+" -- "+this_bridge+" [taillabel=\"fa"+str(i)+"/0\",style=dashed]")
123 # else:
124 # links.append(host+" -- "+this_bridge+" [taillabel=\"fa"+str(i)+"/0\"]")
126 for link in temporary_links:
127 links.append(link[0]+" -- "+link[2]+" [taillabel=\"fa"+str(link[1])+"/0\",color=blue,len=10,w=5,weight=5]")
129 for link in broken_links:
130 links.append(link[0]+" -- "+link[2]+" [taillabel=\"fa"+str(link[1])+"/0\",style=dashed]")
132 linklist=";\n ".join(links)
134 graph_dot = {
135 'nodelist' : nodelist,
136 'bridgelist' : bridgelist,
137 'linklist' : linklist,
138 'physicallist' : physicallist,
139 'networklist' : networklist,
140 }
142 f = open("xenomips.dot", "w");
143 f.write ("""
144 graph G {
145 edge [len=1.25];
146 splines=true;
147 // nodes
149 node [shape=plaintext,color=white,shapefile="shapes/cisco.bmp/router.png"];
150 %(nodelist)s
152 // bridges
154 node [shape=none,shapefile="shapes/all/switch.png"];
155 %(bridgelist)s
157 // physical
159 node [shape=rectangle,color=blue];
160 %(physicallist)s
162 // networks (not bridges, not physical)
163 node [shape=rectangle,color=green];
164 %(networklist)s
166 // links (between nodes and bridges)
167 %(linklist)s
169 };
170 """ % graph_dot)
171 f.close()
172 run_command("neato -Tpng -o xenomips.png xenomips.dot ")
174 def autoredraw():
175 graph()
177 def start_all():
178 create_bridges_script()
179 create_screens_script()
180 create_domains_script()
181 graph()
182 print """
183 cat <<NOTE_FOR_USER
184 # To view virtual network map, run:
185 gqview xenomips.png
186 # To attach to VM consoles, run:
187 screen -c screenrc
188 NOTE_FOR_USER
189 """
191 def shell():
192 ipshell = IPShellEmbed()
193 ipshell()
195 def stop_all():
196 destroy_domains_script()
198 def show_usage():
199 print """Usage:
200 xentaur {start|stop|start-bridges|start-domains|stop-domains|screen|graph}
201 """
203 #-----------------------------------------------------------------------
204 # DOMAINS
206 def get_domain_id(domain):
207 return run_command_return_stdout("sudo xm list | awk '{if ($1 == \"'%s'\") print $2}'" % domain).rstrip("\n")
210 #-----------------------------------------------------------------------
211 # BRIDGES and IFACES
213 def bridge_down(bridge):
214 """
215 Turn the bridge <bridge> down
216 """
217 if bridge in bridges_turned_down:
218 print "Bridge %s is turned down already" % (bridge)
219 else:
220 bridges_turned_down.append(bridge)
221 run_command("sudo ip link set %s down" % bridge)
222 autoredraw()
224 def bridge_up(bridge):
225 """
226 Turn the bridge <bridge> up
227 """
228 if not (bridge in bridges_turned_down):
229 print "Bridge %s is turned up already" % (bridge)
230 else:
231 bridges_turned_down.remove(bridge)
232 run_command("sudo ip link set %s up" % bridge)
233 autoredraw()
235 def show_bridge(bridge):
236 """
237 Show the state of the bridge <bridge>
238 """
239 run_command("sudo ip link show %s" % bridge)
242 def int_disconnect(domain, int_number):
243 """
244 Disconnect the interface with the number <int_number>
245 of the domain <domain> from the bridge to which
246 it is connected
247 """
248 dom_id=get_domain_id(domain)
249 bridge=vbridges_table[domain][int_number]
250 if not bridge:
251 print "Interface %s of the %s domain is not connected" % (int_number, domain)
252 return 1
253 run_command("sudo brctl delif %s vif%s.%s" % (bridge, dom_id, int_number))
254 vbridges_table[domain][int_number]=''
255 if [ domain, int_number, bridge ] in temporary_links:
256 temporary_links.remove([ domain, int_number, bridge ])
257 else:
258 broken_links.append([ domain, int_number, bridge ])
259 autoredraw()
261 def int_connect(domain, int_number, bridge):
262 """
263 Connect the interface with the number <int_number>
264 of the domain <domain> to the bridge <bridge>
265 """
266 dom_id=get_domain_id(domain)
268 if vbridges_table[domain][int_number]:
269 print "Interface %s of the %s domain is connected already to the %s bridge" % (int_number, domain, vbridges_table[domain][int_number])
270 return 1
271 run_command("sudo brctl addif %s vif%s.%s" % (bridge, dom_id, int_number))
272 vbridges_table[domain][int_number]=bridge
273 if [ domain, int_number, bridge ] in broken_links:
274 broken_links.remove([ domain, int_number, bridge ])
275 else:
276 temporary_links.append([ domain, int_number, bridge ])
277 autoredraw()
279 def int_reconnect(domain, int_number, bridge):
280 """
281 Reconnect the interface with the number <int_number>
282 of the domain <domain> from the bridge to which
283 it is connected to the bridge <bridge>
284 """
285 int_disconnect(domain, int_number)
286 int_connect(domain, int_number, bridge)
288 def show_int(domain, int_number):
289 """
290 Show information about the interface <int_nuber>
291 of the domain <domain>
292 """
293 return vbridges_table[domain][int_number]
296 def dump_start(bridge, filter=""):
297 run_command("sudo tcpdump -w xentaur.dump -i %s %s" % (bridge,filter))
298 return 0
300 def dump_stop():
301 return 0
303 #-----------------------------------------------------------------------
306 def add_domain(name,type):
307 domains.append(name)
308 domain_types.append(type)
310 def brake_link(domain,bridge):
311 broken_links.append([domain,bridge])
313 wt_timeout=0.5
314 def write_to(screen,string,return_to_screen=""):
315 """
316 write_to(screen,string):
318 Type *string* to the specified screen(s).
319 Screen may be specified with the number *screen*,
320 with array of numbers,
321 with array of names.
323 """
324 screen_numbers=[] # number of the screens to write to
325 if type(screen) == list:
326 screen_numbers=map(lambda x: domains.index(x)+1, screen)
327 elif type(screen) == int:
328 screen_numbers=[screen]
329 else:
330 screen_numbers=[domains.index(screen)+1]
332 for screen_number in screen_numbers:
333 run_command("screen -X select "+str(screen_number))
334 time.sleep(wt_timeout)
335 for line in string.splitlines():
336 f=open('/tmp/xentaurbuf', 'w')
337 f.write(line+"\n")
338 f.close()
339 run_command("screen -X readreg p /tmp/xentaurbuf")
340 time.sleep(wt_timeout)
341 run_command("nohup screen -X paste p >& /dev/null")
342 time.sleep(wt_timeout)
344 if return_to_screen != "":
345 run_command("screen -X select %s" % (return_to_screen))
346 time.sleep(wt_timeout)
348 #-----------------------------------------------------------------------
350 cisco_fa01_up="""
351 ena
352 conf t
353 int fa0/0
354 no shutdown
355 exit
356 int fa1/0
357 no shutdown
358 exit
359 exit
360 exit
361 """
363 cisco_set_ip_on_int="""
364 interface fa%s/0
365 no ip address
366 ip address %s 255.255.255.0
367 exit
368 """
370 #-----------------------------------------------------------------------
372 nodes=domains
374 if len(sys.argv) > 1:
375 if sys.argv[1] == 'start':
376 start_all()
377 if sys.argv[1] == 'stop':
378 stop_all()
379 if sys.argv[1] == 'start-bridges':
380 create_bridges_script()
381 if sys.argv[1] == 'start-domains':
382 create_domains_script()
383 if sys.argv[1] == 'stop-domains':
384 destroy_domains_script()
385 elif sys.argv[1] == 'screen':
386 create_screens_script()
387 elif sys.argv[1] == 'graph':
388 graph()
389 elif sys.argv[1] == 'shell':
390 shell()
392 else:
393 show_usage()
394 sys.exit(1)
396 sys.exit(0)