1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
|
# vi: ts=4 expandtab
#
# Copyright (C) 2008-2010 Canonical Ltd.
#
# Author: Chuck Short <chuck.short@canonical.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 3, as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
import yaml
import cloudinit
import cloudinit.util as util
import sys
import traceback
import os
import subprocess
per_instance="once-per-instance"
per_always="always"
per_once="once"
class CloudConfig():
cfgfile = None
cfg = None
def __init__(self,cfgfile, cloud=None):
if cloud == None:
self.cloud = cloudinit.CloudInit()
else:
self.cloud = cloud
self.cfg = self.get_config_obj(cfgfile)
self.cloud.get_data_source()
def get_config_obj(self,cfgfile):
try:
cfg = util.read_conf(cfgfile)
except:
# TODO: this 'log' could/should be passed in
cloudinit.log.critical("Failed loading of cloud config '%s'. Continuing with empty config\n" % cfgfile)
cloudinit.log.debug(traceback.format_exc() + "\n")
cfg = None
if cfg is None: cfg = { }
try:
ds_cfg = self.cloud.datasource.get_config_obj()
except:
ds_cfg = { }
cfg = util.mergedict(cfg, ds_cfg)
return(util.mergedict(cfg,self.cloud.cfg))
def handle(self, name, args, freq=None):
try:
mod = __import__("cc_" + name.replace("-","_"),globals())
def_freq = getattr(mod, "frequency",per_instance)
handler = getattr(mod, "handle")
if not freq:
freq = def_freq
self.cloud.sem_and_run("config-" + name, freq, handler,
[ name, self.cfg, self.cloud, cloudinit.log, args ])
except:
raise
# reads a cloudconfig module list, returns
# a 2 dimensional array suitable to pass to run_cc_modules
def read_cc_modules(cfg,name):
if name not in cfg: return([])
module_list = []
# create 'module_list', an array of arrays
# where array[0] = config
# array[1] = freq
# array[2:] = arguemnts
for item in cfg[name]:
if isinstance(item,str):
module_list.append((item,))
elif isinstance(item,list):
module_list.append(item)
else:
raise TypeError("failed to read '%s' item in config")
return(module_list)
def run_cc_modules(cc,module_list,log):
failures = []
for cfg_mod in module_list:
name = cfg_mod[0]
freq = None
run_args = [ ]
if len(cfg_mod) > 1:
freq = cfg_mod[1]
if len(cfg_mod) > 2:
run_args = cfg_mod[2:]
try:
log.debug("handling %s with freq=%s and args=%s" %
(name, freq, run_args ))
cc.handle(name, run_args, freq=freq)
except:
log.warn(traceback.format_exc())
log.error("config handling of %s, %s, %s failed\n" %
(name,freq,run_args))
failures.append(name)
return(failures)
# always returns well formated values
# cfg is expected to have an entry 'output' in it, which is a dictionary
# that includes entries for 'init', 'config', 'final' or 'all'
# init: /var/log/cloud.out
# config: [ ">> /var/log/cloud-config.out", /var/log/cloud-config.err ]
# final:
# output: "| logger -p"
# error: "> /dev/null"
# this returns the specific 'mode' entry, cleanly formatted, with value
# None if if none is given
def get_output_cfg(cfg, mode="init"):
ret = [ None, None ]
if not 'output' in cfg: return ret
outcfg = cfg['output']
if mode in outcfg:
modecfg = outcfg[mode]
else:
if 'all' not in outcfg: return ret
# if there is a 'all' item in the output list
# then it applies to all users of this (init, config, final)
modecfg = outcfg['all']
# if value is a string, it specifies stdout and stderr
if isinstance(modecfg,str):
ret = [ modecfg, modecfg ]
# if its a list, then we expect (stdout, stderr)
if isinstance(modecfg,list):
if len(modecfg) > 0: ret[0] = modecfg[0]
if len(modecfg) > 1:
ret[1] = modecfg[1]
# if it is a dictionary, expect 'out' and 'error'
# items, which indicate out and error
if isinstance(modecfg, dict):
if 'output' in modecfg:
ret[0] = modecfg['output']
if 'error' in modecfg:
ret[1] = modecfg['error']
# if err's entry == "&1", then make it same as stdout
# as in shell syntax of "echo foo >/dev/null 2>&1"
if ret[1] == "&1": ret[1] = ret[0]
swlist = [ ">>", ">", "|" ]
for i in range(len(ret)):
if not ret[i]: continue
val = ret[i].lstrip()
found = False
for s in swlist:
if val.startswith(s):
val = "%s %s" % (s,val[len(s):].strip())
found = True
break
if not found:
# default behavior is append
val = "%s %s" % ( ">>", val.strip())
ret[i] = val
return(ret)
# redirect_output(outfmt, errfmt, orig_out, orig_err)
# replace orig_out and orig_err with filehandles specified in outfmt or errfmt
# fmt can be:
# > FILEPATH
# >> FILEPATH
# | program [ arg1 [ arg2 [ ... ] ] ]
#
# with a '|', arguments are passed to shell, so one level of
# shell escape is required.
def redirect_output(outfmt,errfmt, o_out=sys.stdout, o_err=sys.stderr):
if outfmt:
(mode, arg) = outfmt.split(" ",1)
if mode == ">" or mode == ">>":
owith = "ab"
if mode == ">": owith = "wb"
new_fp = open(arg, owith)
elif mode == "|":
proc = subprocess.Popen(arg, shell=True, stdin=subprocess.PIPE)
new_fp = proc.stdin
else:
raise TypeError("invalid type for outfmt: %s" % outfmt)
if o_out:
os.dup2(new_fp.fileno(), o_out.fileno())
if errfmt == outfmt:
os.dup2(new_fp.fileno(), o_err.fileno())
return
if errfmt:
(mode, arg) = errfmt.split(" ",1)
if mode == ">" or mode == ">>":
owith = "ab"
if mode == ">": owith = "wb"
new_fp = open(arg, owith)
elif mode == "|":
proc = subprocess.Popen(arg, shell=True, stdin=subprocess.PIPE)
new_fp = proc.stdin
else:
raise TypeError("invalid type for outfmt: %s" % outfmt)
if o_err:
os.dup2(new_fp.fileno(), o_err.fileno())
return
|
