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#!/usr/bin/python
from BackwardsReader import BackwardsReader
from Graphite import GraphiteSender
import sys,json,os
from Supernodes import check_all_the_super
from Availability import get_node_availability
import sys,json
from time import time
DUMP_FILE = "/krebs/db/availability"
def resolve_myself(nodes):
#resolve MYSELF to the real ip
for k,v in nodes.iteritems():
if v["external-ip"] == "MYSELF":
for nodek,node in nodes.iteritems():
for to in node['to']:
if to['name'] == k:
v["external-ip"] = to["addr"]
return nodes
def dump_graph(nodes):
from time import time
graph = {}
graph['nodes'] = nodes
graph['timestamp'] = time()
f = open(DUMP_FILE,'a')
json.dump(graph,f)
f.write('\n')
f.close()
def generate_availability_stats(nodes):
""" generates stats of from availability
"""
jlines = []
try:
f = BackwardsReader(DUMP_FILE)
lines_to_use = 1000
while True:
if lines_to_use == 0: break
line = f.readline()
if not line: break
jline = json.loads(line)
if not jline['nodes']: continue
jlines.append(jline)
lines_to_use -=1
except Exception,e: sys.stderr.write(str(e))
for k,v in nodes.iteritems():
v['availability'] = get_node_availability(k,jlines)
sys.stderr.write( "%s -> %f\n" %(k ,v['availability']))
def generate_stats(nodes):
""" Generates some statistics of the network and nodes
"""
for k,v in nodes.iteritems():
conns = v.get('to',[])
for c in conns: #sanitize weights
if float(c['weight']) > 9000: c['weight'] = str(9001)
elif float(c['weight']) < 0: c['weight'] = str(0)
v['num_conns'] = len(conns)
v['avg_weight'] = get_node_avg_weight(conns)
def get_node_avg_weight(conns):
""" calculates the average weight for the given connections """
if not conns:
sys.syderr.write("get_node_avg_weight: connection parameter empty")
return 9001
else:
return sum([float(c['weight']) for c in conns])/len(conns)
def delete_unused_nodes(nodes):
""" Deletes all the nodes which are currently not connected to the network"""
new_nodes = {}
for k,v in nodes.iteritems():
if v['external-ip'] == "(null)":
continue
if v.get('to',[]):
new_nodes[k] = v
for k,v in new_nodes.iteritems():
if not [ i for i in v['to'] if i['name'] in new_nodes]:
del(k)
return new_nodes
def merge_edges(nodes):
""" merge back and forth edges into one
DESTRUCTS the current structure by deleting "connections" in the nodes
"""
for k,v in nodes.iteritems():
for con in v.get('to',[]):
for i,secon in enumerate(nodes.get(con['name'],{}).get('to',[])):
if k == secon['name']:
del (nodes[con['name']]['to'][i])
con['bidirectional'] = True
def print_head():
print ('digraph retiolum {')
print (' graph [center packMode="clust"]')
print (' node[shape=box,style=filled,fillcolor=grey]')
print (' overlap=false')
def print_stat_node(nodes):
''' Write a `stats` node in the corner
This node contains infos about the current number of active nodes and connections inside the network
'''
from time import localtime,strftime
num_conns = 0
num_nodes = len(nodes)
try:
msg = '%s.num_nodes %d %d\r\n' %(g_path,num_nodes,begin)
s.send(msg)
except Exception as e: pass
#except: pass
for k,v in nodes.iteritems():
num_conns+= len(v['to'])
node_text = " stats_node [label=\"Statistics\\l"
node_text += "Build Date : %s\\l" % strftime("%Y-%m-%d %H:%M:%S",localtime())
node_text += "Active Nodes: %s\\l" % num_nodes
node_text += "Connections : %s\\l" % num_conns
node_text += "\""
node_text += ",fillcolor=green"
node_text += "]"
print(node_text)
def print_node(k,v):
""" writes a single node and its edges
edges are weightet with the informations inside the nodes provided by
tinc
"""
node = " "+k+"[label=\""
node += k+"\\l"
node += "availability: %f\\l" % v['availability']
if v.has_key('num_conns'):
node += "Num Connects:"+str(v['num_conns'])+"\\l"
node += "external:"+v['external-ip']+":"+v['external-port']+"\\l"
for addr in v.get('internal-ip',['dunno lol']):
node += "internal:%s\\l"%addr
node +="\""
if v['num_conns'] == 1:
node += ",fillcolor=red"
elif k in supernodes:
node += ",fillcolor=steelblue1"
node += "]"
print node
def print_anonymous_node(k,v):
""" writes a single node and its edges
edges are weightet with the informations inside the nodes provided by
tinc
"""
node = " "+k #+"[label=\""
print node
def print_edge(k,v):
for con in v.get('to',[]):
label = con['weight']
w = int(con['weight'])
weight = str(1000 - (((w - 150) * (1000 - 0)) / (1000 -150 )) + 0)
length = str(float(w)/1500)
if float(weight) < 0 :
weight= "1"
edge = " "+k+ " -> " +con['name'] + " [label="+label + " weight="+weight
if con.get('bidirectional',False):
edge += ",dir=both"
edge += "]"
print edge
def anonymize_nodes(nodes):
#anonymizes all nodes
i = "0"
newnodes = {}
for k,v in nodes.iteritems():
for nodek,node in nodes.iteritems():
for to in node['to']:
if to['name'] == k:
to['name'] = i
newnodes[i] = v
i = str(int(i)+1)
return newnodes
if __name__ == "__main__":
supernodes= []
try:
gr = GraphiteSender(os.environ.get("GRAPHITE_HOST","localhost"))
begin = time()
except Exception as e:
sys.stderr.write( "Cannot connect to graphite: " + str(e))
if len(sys.argv) != 2 or sys.argv[1] not in ["anonymous","complete"]:
print("usage: %s (anonymous|complete)")
sys.exit(1)
nodes = json.load(sys.stdin)
nodes = delete_unused_nodes(nodes)
print_head()
generate_stats(nodes)
merge_edges(nodes)
if sys.argv[1] == "anonymous":
nodes = anonymize_nodes(nodes)
for k,v in nodes.iteritems():
print_anonymous_node(k,v)
print_edge(k,v)
elif sys.argv[1] == "complete":
for supernode,addr in check_all_the_super():
supernodes.append(supernode)
generate_availability_stats(nodes)
for k,v in nodes.iteritems():
print_node(k,v)
print_edge(k,v)
try:
dump_graph(nodes)
except Exception,e:
sys.stderr.write("Cannot dump graph: %s" % str(e))
else:
pass
print_stat_node(nodes)
print ('}')
try:
gr.send("graph.anon_build_time",(time()-begin)*1000)
except Exception as e: pass
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