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# vi: ts=4 expandtab
#
# Copyright (C) 2008-2010 Canonical Ltd.
# Copyright (C) 2012 Hewlett-Packard Development Company, L.P.
#
# Author: Chuck Short <chuck.short@canonical.com>
# Author: Juerg Haefliger <juerg.haefliger@hp.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 os
import subprocess
import sys
import time
import traceback
import yaml
from cloudinit.settings import (PER_INSTANCE, PER_ALWAYS, PER_ONCE)
from cloudinit import log as logging
from cloudinit import util
LOG = logging.getLogger(__name__)
DEF_HANDLER_VERSION = 1
DEF_FREQ = PER_INSTANCE
# 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
def run_per_instance(name, func, args, clear_on_fail=False):
semfile = "%s/%s" % (cloudinit.get_ipath_cur("data"), name)
if os.path.exists(semfile):
return
util.write_file(semfile, str(time.time()))
try:
func(*args)
except:
if clear_on_fail:
os.unlink(semfile)
raise
# apt_get top level command (install, update...), and args to pass it
def apt_get(tlc, args=None):
if args is None:
args = []
e = os.environ.copy()
e['DEBIAN_FRONTEND'] = 'noninteractive'
cmd = ['apt-get', '--option', 'Dpkg::Options::=--force-confold',
'--assume-yes', tlc]
cmd.extend(args)
subprocess.check_call(cmd, env=e)
def update_package_sources():
run_per_instance("update-sources", apt_get, ("update",))
def install_packages(pkglist):
update_package_sources()
apt_get("install", pkglist)
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