cdist/cdist/config_install.py

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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#
# 2010-2012 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 stat
import shutil
import sys
import tempfile
import time
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import itertools
import pprint
import cdist
from cdist import core
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from cdist import resolver
class ConfigInstall(object):
"""Cdist main class to hold arbitrary data"""
def __init__(self, context):
self.context = context
self.log = logging.getLogger(self.context.target_host)
# Initialise local directory structure
self.context.local.create_files_dirs()
# Initialise remote directory structure
self.context.remote.create_files_dirs()
self.explorer = core.Explorer(self.context.target_host, self.context.local, self.context.remote)
self.manifest = core.Manifest(self.context.target_host, self.context.local)
self.code = core.Code(self.context.target_host, self.context.local, self.context.remote)
# Add switch to disable code execution
self.dry_run = False
def cleanup(self):
# FIXME: move to local?
destination = os.path.join(self.context.local.cache_path, self.context.target_host)
self.log.debug("Saving " + self.context.local.out_path + " to " + destination)
if os.path.exists(destination):
shutil.rmtree(destination)
shutil.move(self.context.local.out_path, destination)
def deploy_to(self):
"""Mimic the old deploy to: Deploy to one host"""
self.stage_prepare()
self.stage_run()
def deploy_and_cleanup(self):
"""Do what is most often done: deploy & cleanup"""
start_time = time.time()
self.deploy_to()
self.cleanup()
self.log.info("Finished successful run in %s seconds",
time.time() - start_time)
def stage_prepare(self):
"""Do everything for a deploy, minus the actual code stage"""
self.explorer.run_global_explorers(self.context.local.global_explorer_out_path)
self.manifest.run_initial_manifest(self.context.initial_manifest)
self.log.info("Running object manifests and type explorers")
# Continue process until no new objects are created anymore
new_objects_created = True
while new_objects_created:
new_objects_created = False
for cdist_object in core.CdistObject.list_objects(self.context.local.object_path,
self.context.local.type_path):
if cdist_object.state == core.CdistObject.STATE_PREPARED:
self.log.debug("Skipping re-prepare of object %s", cdist_object)
continue
else:
self.object_prepare(cdist_object)
new_objects_created = True
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, dry_run=False):
"""Run gencode and code for an object"""
self.log.debug("Trying to run object " + cdist_object.name)
if cdist_object.state == core.CdistObject.STATE_DONE:
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raise cdist.Error("Attempting to run an already finished object: %s", cdist_object)
cdist_type = cdist_object.cdist_type
# Generate
self.log.info("Generating and executing code for " + 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 dry_run:
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)
# Mark this object as done
self.log.debug("Finishing run of " + cdist_object.name)
cdist_object.state = core.CdistObject.STATE_DONE
def stage_run(self):
"""The final (and real) step of deployment"""
self.log.info("Generating and executing code")
# FIXME: think about parallel execution (same for stage_prepare)
self.all_resolved = False
while not self.all_resolved:
self.stage_run_iterate()
def stage_run_iterate(self):
"""
Run one iteration of the run
To be repeated until all objects are done
"""
objects = list(core.CdistObject.list_objects(self.context.local.object_path, self.context.local.type_path))
object_state_list=' '.join('%s:%s:%s:%s' % (o, o.state, o.all_requirements, o.satisfied_requirements) for o in objects)
self.log.debug("Object state (name:state:requirements:satisfied): %s" % object_state_list)
objects_changed = False
self.all_resolved = True
for cdist_object in objects:
if not cdist_object.state == cdist_object.STATE_DONE:
self.all_resolved = False
self.log.debug("Object %s not done" % cdist_object.name)
if cdist_object.satisfied_requirements:
self.log.debug("Running object %s with satisfied requirements" % cdist_object.name)
self.object_run(cdist_object, self.dry_run)
objects_changed = True
self.log.debug("All resolved: %s Objects changed: %s" % (self.all_resolved, objects_changed))
# Not all are resolved, but nothing has been changed => bad dependencies!
if not objects_changed and not self.all_resolved:
# Create list of unfinished objects + their requirements for print
evil_objects = []
good_objects = []
for cdist_object in objects:
if not cdist_object.state == cdist_object.STATE_DONE:
evil_objects.append("%s: required: %s, autorequired: %s" %
(cdist_object.name, cdist_object.requirements, cdist_object.autorequire))
else:
evil_objects.append("%s (%s): required: %s, autorequired: %s" %
(cdist_object.state, cdist_object.name,
cdist_object.requirements, cdist_object.autorequire))
errormessage = "Cannot solve requirements for the following objects: %s - solved: %s" % (",".join(evil_objects), ",".join(good_objects))
raise cdist.Error(errormessage)