fa55bf8ddb
consume_userdata should really run always, rather than once per instance. The documentation says that boothooks were on their own for per-instance but since this routine was only being called once, they would only get called once. This modifies the behavior to be: user_script: per_always cloud_config : per_always upstart_job : per_instance cloud_boothook: per_always In order to not break part handlers that are existing, and expect to only be called once per instance, this adds a 'handler_version' item in a handler that can indicate the version (currently 1 or 2). If it is 2, then the hander will be passed the frequency (per-instance or per-always) that this is being run. That way the handler can differenciate between them. This also makes 'bootcmd' run every boot. That should be changable in cloud-config though, so users who dont like the behavior can modify it.
251 lines
7.8 KiB
Python
251 lines
7.8 KiB
Python
# vi: ts=4 expandtab
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#
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# Copyright (C) 2008-2010 Canonical Ltd.
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#
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# Author: Chuck Short <chuck.short@canonical.com>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License version 3, as
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# published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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import yaml
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import cloudinit
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import cloudinit.util as util
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import sys
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import traceback
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import os
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import subprocess
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import time
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per_instance= cloudinit.per_instance
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per_always = cloudinit.per_always
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per_once = cloudinit.per_once
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class CloudConfig():
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cfgfile = None
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cfg = None
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def __init__(self,cfgfile, cloud=None, ds_deps=[]):
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if cloud == None:
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self.cloud = cloudinit.CloudInit(ds_deps)
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self.cloud.get_data_source()
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else:
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self.cloud = cloud
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self.cfg = self.get_config_obj(cfgfile)
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def get_config_obj(self,cfgfile):
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try:
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cfg = util.read_conf(cfgfile)
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except:
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# TODO: this 'log' could/should be passed in
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cloudinit.log.critical("Failed loading of cloud config '%s'. Continuing with empty config\n" % cfgfile)
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cloudinit.log.debug(traceback.format_exc() + "\n")
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cfg = None
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if cfg is None: cfg = { }
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try:
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ds_cfg = self.cloud.datasource.get_config_obj()
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except:
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ds_cfg = { }
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cfg = util.mergedict(cfg, ds_cfg)
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return(util.mergedict(cfg,self.cloud.cfg))
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def handle(self, name, args, freq=None):
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try:
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mod = __import__("cc_" + name.replace("-","_"),globals())
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def_freq = getattr(mod, "frequency",per_instance)
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handler = getattr(mod, "handle")
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if not freq:
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freq = def_freq
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self.cloud.sem_and_run("config-" + name, freq, handler,
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[ name, self.cfg, self.cloud, cloudinit.log, args ])
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except:
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raise
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# reads a cloudconfig module list, returns
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# a 2 dimensional array suitable to pass to run_cc_modules
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def read_cc_modules(cfg,name):
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if name not in cfg: return([])
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module_list = []
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# create 'module_list', an array of arrays
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# where array[0] = config
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# array[1] = freq
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# array[2:] = arguemnts
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for item in cfg[name]:
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if isinstance(item,str):
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module_list.append((item,))
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elif isinstance(item,list):
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module_list.append(item)
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else:
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raise TypeError("failed to read '%s' item in config")
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return(module_list)
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def run_cc_modules(cc,module_list,log):
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failures = []
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for cfg_mod in module_list:
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name = cfg_mod[0]
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freq = None
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run_args = [ ]
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if len(cfg_mod) > 1:
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freq = cfg_mod[1]
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if len(cfg_mod) > 2:
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run_args = cfg_mod[2:]
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try:
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log.debug("handling %s with freq=%s and args=%s" %
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(name, freq, run_args ))
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cc.handle(name, run_args, freq=freq)
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except:
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log.warn(traceback.format_exc())
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log.error("config handling of %s, %s, %s failed\n" %
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(name,freq,run_args))
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failures.append(name)
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return(failures)
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# always returns well formated values
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# cfg is expected to have an entry 'output' in it, which is a dictionary
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# that includes entries for 'init', 'config', 'final' or 'all'
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# init: /var/log/cloud.out
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# config: [ ">> /var/log/cloud-config.out", /var/log/cloud-config.err ]
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# final:
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# output: "| logger -p"
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# error: "> /dev/null"
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# this returns the specific 'mode' entry, cleanly formatted, with value
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# None if if none is given
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def get_output_cfg(cfg, mode="init"):
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ret = [ None, None ]
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if not 'output' in cfg: return ret
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outcfg = cfg['output']
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if mode in outcfg:
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modecfg = outcfg[mode]
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else:
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if 'all' not in outcfg: return ret
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# if there is a 'all' item in the output list
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# then it applies to all users of this (init, config, final)
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modecfg = outcfg['all']
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# if value is a string, it specifies stdout and stderr
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if isinstance(modecfg,str):
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ret = [ modecfg, modecfg ]
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# if its a list, then we expect (stdout, stderr)
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if isinstance(modecfg,list):
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if len(modecfg) > 0: ret[0] = modecfg[0]
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if len(modecfg) > 1:
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ret[1] = modecfg[1]
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# if it is a dictionary, expect 'out' and 'error'
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# items, which indicate out and error
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if isinstance(modecfg, dict):
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if 'output' in modecfg:
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ret[0] = modecfg['output']
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if 'error' in modecfg:
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ret[1] = modecfg['error']
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# if err's entry == "&1", then make it same as stdout
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# as in shell syntax of "echo foo >/dev/null 2>&1"
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if ret[1] == "&1": ret[1] = ret[0]
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swlist = [ ">>", ">", "|" ]
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for i in range(len(ret)):
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if not ret[i]: continue
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val = ret[i].lstrip()
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found = False
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for s in swlist:
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if val.startswith(s):
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val = "%s %s" % (s,val[len(s):].strip())
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found = True
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break
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if not found:
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# default behavior is append
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val = "%s %s" % ( ">>", val.strip())
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ret[i] = val
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return(ret)
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# redirect_output(outfmt, errfmt, orig_out, orig_err)
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# replace orig_out and orig_err with filehandles specified in outfmt or errfmt
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# fmt can be:
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# > FILEPATH
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# >> FILEPATH
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# | program [ arg1 [ arg2 [ ... ] ] ]
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#
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# with a '|', arguments are passed to shell, so one level of
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# shell escape is required.
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def redirect_output(outfmt,errfmt, o_out=sys.stdout, o_err=sys.stderr):
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if outfmt:
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(mode, arg) = outfmt.split(" ",1)
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if mode == ">" or mode == ">>":
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owith = "ab"
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if mode == ">": owith = "wb"
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new_fp = open(arg, owith)
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elif mode == "|":
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proc = subprocess.Popen(arg, shell=True, stdin=subprocess.PIPE)
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new_fp = proc.stdin
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else:
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raise TypeError("invalid type for outfmt: %s" % outfmt)
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if o_out:
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os.dup2(new_fp.fileno(), o_out.fileno())
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if errfmt == outfmt:
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os.dup2(new_fp.fileno(), o_err.fileno())
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return
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if errfmt:
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(mode, arg) = errfmt.split(" ",1)
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if mode == ">" or mode == ">>":
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owith = "ab"
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if mode == ">": owith = "wb"
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new_fp = open(arg, owith)
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elif mode == "|":
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proc = subprocess.Popen(arg, shell=True, stdin=subprocess.PIPE)
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new_fp = proc.stdin
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else:
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raise TypeError("invalid type for outfmt: %s" % outfmt)
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if o_err:
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os.dup2(new_fp.fileno(), o_err.fileno())
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return
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def run_per_instance(name, func, args, clear_on_fail=False):
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semfile = "%s/%s" % (cloudinit.get_ipath_cur("data"),name)
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if os.path.exists(semfile): return
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util.write_file(semfile,str(time.time()))
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try:
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func(*args)
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except:
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if clear_on_fail: os.unlink(semfile)
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raise
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# apt_get top level command (install, update...), and args to pass it
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def apt_get(tlc,args=[]):
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e=os.environ.copy()
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e['DEBIAN_FRONTEND']='noninteractive'
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cmd=[ 'apt-get',
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'--option', 'Dpkg::Options::=--force-confold', '--assume-yes',
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tlc ]
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cmd.extend(args)
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subprocess.check_call(cmd,env=e)
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def update_package_sources():
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run_per_instance("update-sources", apt_get, ("update",))
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def install_packages(pkglist):
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update_package_sources()
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apt_get("install",pkglist)
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