cdist/cdist/config.py

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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#
# 2010-2013 Nico Schottelius (nico-cdist at schottelius.org)
#
# This file is part of cdist.
#
# cdist is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# cdist 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 cdist. If not, see <http://www.gnu.org/licenses/>.
#
#
import logging
import os
import shutil
import sys
import time
import pprint
import cdist
import cdist.exec.local
import cdist.exec.remote
from cdist import core
class Config(object):
"""Cdist main class to hold arbitrary data"""
def __init__(self, local, remote, dry_run=False):
self.local = local
self.remote = remote
self.log = logging.getLogger(self.local.target_host)
self.dry_run = dry_run
self.explorer = core.Explorer(self.local.target_host, self.local, self.remote)
self.manifest = core.Manifest(self.local.target_host, self.local)
self.code = core.Code(self.local.target_host, self.local, self.remote)
def _init_files_dirs(self):
"""Prepare files and directories for the run"""
self.local.create_files_dirs()
self.remote.create_files_dirs()
@classmethod
def commandline(cls, args):
"""Configure remote system"""
import multiprocessing
# FIXME: Refactor relict - remove later
log = logging.getLogger("cdist")
initial_manifest_tempfile = None
if args.manifest == '-':
# read initial manifest from stdin
import tempfile
try:
handle, initial_manifest_temp_path = tempfile.mkstemp(prefix='cdist.stdin.')
with os.fdopen(handle, 'w') as fd:
fd.write(sys.stdin.read())
except (IOError, OSError) as e:
raise cdist.Error("Creating tempfile for stdin data failed: %s" % e)
args.manifest = initial_manifest_temp_path
import atexit
atexit.register(lambda: os.remove(initial_manifest_temp_path))
process = {}
failed_hosts = []
time_start = time.time()
for host in args.host:
if args.parallel:
log.debug("Creating child process for %s", host)
process[host] = multiprocessing.Process(target=cls.onehost, args=(host, args, True))
process[host].start()
else:
try:
cls.onehost(host, args, parallel=False)
except cdist.Error as e:
failed_hosts.append(host)
# Catch errors in parallel mode when joining
if args.parallel:
for host in process.keys():
log.debug("Joining process %s", host)
process[host].join()
if not process[host].exitcode == 0:
failed_hosts.append(host)
time_end = time.time()
log.info("Total processing time for %s host(s): %s", len(args.host),
(time_end - time_start))
if len(failed_hosts) > 0:
raise cdist.Error("Failed to configure the following hosts: " +
" ".join(failed_hosts))
@classmethod
def onehost(cls, host, args, parallel):
"""Configure ONE system"""
log = logging.getLogger(host)
try:
local = cdist.exec.local.Local(
target_host=host,
initial_manifest=args.manifest,
base_path=args.out_path,
add_conf_dirs=args.conf_dir)
remote = cdist.exec.remote.Remote(
target_host=host,
remote_exec=args.remote_exec,
remote_copy=args.remote_copy)
c = cls(local, remote, dry_run=args.dry_run)
c.run()
except cdist.Error as e:
log.error(e)
if parallel:
# We are running in our own process here, need to sys.exit!
sys.exit(1)
else:
raise
except KeyboardInterrupt:
# Ignore in parallel mode, we are existing anyway
if parallel:
sys.exit(0)
# Pass back to controlling code in sequential mode
else:
raise
def run(self):
"""Do what is most often done: deploy & cleanup"""
start_time = time.time()
self._init_files_dirs()
self.explorer.run_global_explorers(self.local.global_explorer_out_path)
self.manifest.run_initial_manifest(self.local.initial_manifest)
self.iterate_until_finished()
self.local.save_cache()
self.log.info("Finished successful run in %s seconds", time.time() - start_time)
def object_list(self):
"""Short name for object list retrieval"""
for cdist_object in core.CdistObject.list_objects(self.local.object_path,
self.local.type_path):
yield cdist_object
def iterate_once(self):
"""
Iterate over the objects once - helper method for
iterate_until_finished
"""
objects_changed = False
for cdist_object in self.object_list():
if cdist_object.requirements_unfinished(cdist_object.requirements):
"""We cannot do anything for this poor object"""
continue
if cdist_object.state == core.CdistObject.STATE_UNDEF:
"""Prepare the virgin object"""
self.object_prepare(cdist_object)
objects_changed = True
if cdist_object.requirements_unfinished(cdist_object.autorequire):
"""The previous step created objects we depend on - wait for them"""
continue
if cdist_object.state == core.CdistObject.STATE_PREPARED:
self.object_run(cdist_object)
objects_changed = True
return objects_changed
def iterate_until_finished(self):
"""
Go through all objects and solve them
one after another
"""
objects_changed = True
while objects_changed:
objects_changed = self.iterate_once()
# Check whether all objects have been finished
unfinished_objects = []
for cdist_object in self.object_list():
if not cdist_object.state == cdist_object.STATE_DONE:
unfinished_objects.append(cdist_object)
if unfinished_objects:
info_string = []
for cdist_object in unfinished_objects:
requirement_names = []
autorequire_names = []
for requirement in cdist_object.requirements_unfinished(cdist_object.requirements):
requirement_names.append(requirement.name)
for requirement in cdist_object.requirements_unfinished(cdist_object.autorequire):
autorequire_names.append(requirement.name)
requirements = ", ".join(requirement_names)
autorequire = ", ".join(autorequire_names)
info_string.append("%s requires: %s autorequires: %s" % (cdist_object.name, requirements, autorequire))
raise cdist.UnresolvableRequirementsError("The requirements of the following objects could not be resolved: %s" %
("; ".join(info_string)))
def object_prepare(self, cdist_object):
"""Prepare object: Run type explorer + manifest"""
self.log.info("Running manifest and explorers for " + cdist_object.name)
self.explorer.run_type_explorers(cdist_object)
self.manifest.run_type_manifest(cdist_object)
cdist_object.state = core.CdistObject.STATE_PREPARED
def object_run(self, cdist_object):
"""Run gencode and code for an object"""
self.log.debug("Trying to run object %s" % (cdist_object.name))
if cdist_object.state == core.CdistObject.STATE_DONE:
raise cdist.Error("Attempting to run an already finished object: %s", cdist_object)
cdist_type = cdist_object.cdist_type
# Generate
self.log.info("Generating code for %s" % (cdist_object.name))
cdist_object.code_local = self.code.run_gencode_local(cdist_object)
cdist_object.code_remote = self.code.run_gencode_remote(cdist_object)
if cdist_object.code_local or cdist_object.code_remote:
cdist_object.changed = True
# Execute
if not self.dry_run:
if cdist_object.code_local or cdist_object.code_remote:
self.log.info("Executing code for %s" % (cdist_object.name))
if cdist_object.code_local:
self.code.run_code_local(cdist_object)
if cdist_object.code_remote:
self.code.transfer_code_remote(cdist_object)
self.code.run_code_remote(cdist_object)
else:
self.log.info("Skipping code execution due to DRY RUN")
# Mark this object as done
self.log.debug("Finishing run of " + cdist_object.name)
cdist_object.state = core.CdistObject.STATE_DONE