01ab283fe2f8fc02870b1292f26bce22c87f2d76
[nodemanager.git] / plugins / vsys_privs.py
1 """
2 vsys sub-configurator.  Maintains configuration parameters associated with vsys scripts.
3 All slice attributes with the prefix vsys_ are written into configuration files on the
4 node for the reference of vsys scripts.
5 """
6
7 import logger
8 import os
9
10 VSYS_PRIV_DIR = "/etc/planetlab/vsys-attributes"
11
12 def start():
13     logger.log("vsys_privs: plugin starting")
14     if (not os.path.exists(VSYS_PRIV_DIR)):
15         os.makedirs(VSYS_PRIV_DIR)
16         logger.log("vsys_privs: Created vsys attributes dir")
17
18 def GetSlivers(data, config=None, plc=None):
19
20     if 'slivers' not in data:
21         logger.log_missing_data("vsys_privs.GetSlivers",'slivers')
22         return
23
24
25     privs = {}
26
27     # Parse attributes and update dict of scripts
28     if 'slivers' not in data:
29         logger.log_missing_data("vsys_privs.GetSlivers",'slivers')
30         return
31     for sliver in data['slivers']:
32         slice = sliver['name']
33         for attribute in sliver['attributes']:
34             tag = attribute['tagname']
35             value = attribute['value']
36             if tag.startswith('vsys_'):
37                 if (privs.has_key(slice)):
38                     slice_priv = privs[slice]
39                     if (slice_priv.has_key(tag)):
40                         slice_priv[tag].append(value)
41                     else:
42                         slice_priv[tag]=[value]
43
44                     privs[slice] = slice_priv
45                 else:
46                     privs[slice] = {tag:[value]}
47
48     cur_privs = read_privs()
49     write_privs(cur_privs, privs)
50
51 def read_privs():
52     cur_privs={}
53     priv_finder = os.walk(VSYS_PRIV_DIR)
54     priv_find = [i for i in priv_finder]
55     (rootdir,slices,foo) = priv_find[0]
56
57     for slice in slices:
58         cur_privs[slice]={}
59
60     if (len(priv_find)>1):
61         for (slicedir,bar,tagnames) in priv_find[1:]:
62             if (bar != []):
63                 # The depth of the vsys-privileges directory = 1
64                 pass
65
66             for tagname in tagnames:
67                 tagfile = os.path.join(slicedir,tagname)
68                 values_n = file(tagfile).readlines()
69                 values = map(lambda s:s.rstrip(),values_n)
70                 slice = os.path.basename(slicedir)
71                 cur_privs[slice][tagname]=values
72
73     return cur_privs
74
75 def write_privs(cur_privs,privs):
76     for slice in privs.keys():
77         variables = privs[slice]
78         slice_dir = os.path.join(VSYS_PRIV_DIR,slice)
79         if (not os.path.exists(slice_dir)):
80             os.mkdir(slice_dir)
81
82         # Add values that do not exist
83         for k in variables.keys():
84             v = variables[k]
85             if (cur_privs.has_key(slice)
86                     and cur_privs[slice].has_key(k)
87                     and cur_privs[slice][k] == v):
88                 # The binding has not changed
89                 pass
90             else:
91                 v_file = os.path.join(slice_dir, k)
92                 f = open(v_file,'w')
93                 data = '\n'.join(v)
94                 f.write(data)
95                 f.close()
96                 logger.log("vsys_privs: added vsys attribute %s for %s"%(k,slice))
97
98     # Remove files and directories
99     # that are invalid
100     for slice in cur_privs.keys():
101         variables = cur_privs[slice]
102         slice_dir = os.path.join(VSYS_PRIV_DIR,slice)
103
104         # Add values that do not exist
105         for k in variables.keys():
106             if (privs.has_key(slice)
107                     and cur_privs[slice].has_key(k)):
108                 # ok, spare this tag
109                 print "Sparing  %s, %s "%(slice,k)
110             else:
111                 v_file = os.path.join(slice_dir, k)
112                 os.remove(v_file)
113
114         if (not privs.has_key(slice)):
115             os.rmdir(slice_dir)
116
117
118 if __name__ == "__main__":
119     test_slivers = {'slivers':[
120         {'name':'foo','attributes':[
121             {'tagname':'vsys_m','value':'2'},
122             {'tagname':'vsys_m','value':'3'},
123             {'tagname':'vsys_m','value':'4'}
124             ]},
125         {'name':'bar','attributes':[
126             #{'tagname':'vsys_x','value':'z'}
127             ]}
128         ]}
129     start(None,None)
130     GetSlivers(test_slivers)