cdist/lib/cdist/config_install.py

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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#
# 2010-2011 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
import cdist.core
import cdist.context
import cdist.exec
import cdist.explorer
#import cdist.manifest
class ConfigInstall(object):
"""Cdist main class to hold arbitrary data"""
def __init__(self, context):
self.context = context
self.exec_wrapper = cdist.exec.Wrapper(
target_host = self.context.target_host,
remote_exec=self.context.remote_exec,
remote_copy=self.context.remote_copy)
self.explorer = cdist.explorer.Explorer(self.context)
#self.manifest = cdist.manifest.Mamifest()
self.log = logging.getLogger(self.context.target_host)
# Setup env to be used by others - FIXME
self.__init_env()
# Create directories
self.__init_local_paths()
self.__init_remote_paths()
def __init_remote_paths(self):
"""Initialise remote directory structure"""
self.exec_wrapper.remove_remote_path(self.context.remote_base_path)
self.exec_wrapper.remote_mkdir(self.context.remote_base_path)
self.exec_wrapper.remote_mkdir(self.context.remote_conf_path)
def __init_local_paths(self):
"""Initialise local directory structure"""
# Create base dir, if user supplied and not existing
if not os.path.isdir(self.context.base_path):
os.mkdir(self.context.base_path)
# FIXME: raise more beautiful exception / Steven: handle exception
os.mkdir(self.context.out_path)
os.mkdir(self.global_explorer_out_path)
os.mkdir(self.context.bin_path)
# FIXME: remove this function, only expose ENV
# explicitly!
def __init_env(self):
"""Environment usable for other stuff"""
os.environ['__target_host'] = self.context.target_host
if self.context.debug:
os.environ['__debug'] = "yes"
def cleanup(self):
log.debug("Saving " + self.context.out_path + " to " + self.context.cache_path)
if os.path.exists(self.context.cache_path):
shutil.rmtree(self.context.cache_path)
shutil.move(self.context.out_path, self.context.cache_path)
def object_prepare(self, cdist_object):
"""Prepare object: Run type explorer + manifest"""
log.debug("Preparing object: " + cdist_object.name)
cdist_object.explorers =
self.explorer.run_type_explorer(cdist_object)
self.manifest.run_type_manifest(cdist_object)
cdist_object.prepared = True
def object_run(self, cdist_object):
"""Run gencode and code for an object"""
log.debug("Running object %s", cdist_object)
# Catch requirements, which re-call us
if cdist_object.ran:
return
cdist_type = cdist_object.type
for requirement in cdist_object.requirements:
log.debug("Object %s requires %s", cdist_object, requirement)
self.object_run(requirement)
#
# Setup env Variable:
#
env = os.environ.copy()
env['__target_host'] = self.context.target_host
env['__global'] = self.context.out_path
env["__object"] = os.path.join(self.object_base_path, cdist_object.path)
env["__object_id"] = cdist_object.object_id
env["__object_fq"] = cdist_object.name
env["__type"] = cdist_type.name
# gencode
for cmd in ["local", "remote"]:
bin = os.path.join(self.type_base_path,
getattr(cdist_type, "gencode_" + cmd + "_path"))
if os.path.isfile(bin):
outfile = os.path.join(self.object_base_path,
getattr(cdist_object, "code_" + cmd + "_path"))
outfile_fd = open(outfile, "w")
# Need to flush to ensure our write is done before stdout write
# FIXME: code header still needed?
outfile_fd.write(CODE_HEADER)
outfile_fd.flush()
cdist.exec.shell_run_or_debug_fail(bin, [bin], env=env, stdout=outfile_fd)
outfile_fd.close()
status = os.stat(outfile)
# Remove output if empty, else make it executable
if status.st_size == len(CODE_HEADER):
os.unlink(outfile)
else:
# Add header and make executable - identically to 0o700
os.chmod(outfile, stat.S_IXUSR | stat.S_IRUSR | stat.S_IWUSR)
cdist_object.changed=True
# code local
code_local = cdist_object.code_local_path
if os.path.isfile(code_local):
cdist.exec.run_or_fail([code_local])
# code remote
local_remote_code = os.path.join(self.object_base_path,
cdist_object.code_remote_path)
remote_remote_code = os.path.join(self.remote_object_path,
cdist_object.code_remote_path)
if os.path.isfile(local_remote_code):
self.context.transfer_path(local_remote_code, remote_remote_code)
cdist.exec.run_or_fail([remote_remote_code], remote_prefix=True)
cdist_object.ran = True
def link_emulator(self):
"""Link emulator to types"""
src = os.path.abspath(self.context.exec_path)
for cdist_type in cdist.core.Type.list_types(self.type_base_path):
dst = os.path.join(self.context.bin_path, cdist_type.name)
log.debug("Linking emulator: %s to %s", src, dst)
# FIXME: handle exception / make it more beautiful / Steven: raise except :-)
os.symlink(src, dst)
def deploy_to(self):
"""Mimic the old deploy to: Deploy to one host"""
log.info("Deploying to " + self.context.target_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()
log.info("Finished run of %s in %s seconds",
self.context.target_host, time.time() - start_time)
def stage_prepare(self):
"""Do everything for a deploy, minus the actual code stage"""
self.link_emulator()
self.run_global_explorers()
self.run_initial_manifest()
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 cdist.core.Object.list_objects(self.object_base_path,
self.type_base_path):
if cdist_object.prepared:
log.debug("Skipping rerun of object %s", cdist_object)
continue
else:
self.object_prepare(cdist_object)
new_objects_created = True
def stage_run(self):
"""The final (and real) step of deployment"""
log.info("Generating and executing code")
for cdist_object in cdist.core.Object.list_objects(self.object_base_path,
self.type_base_path):
log.debug("Run object: %s", cdist_object)
self.object_run(cdist_object)