cdist-backup/lib/cdist/config_install.py
Nico Schottelius 08975c4d2f path -> config_install
Signed-off-by: Nico Schottelius <nico@kr.ethz.ch>
2011-10-07 09:47:29 +02:00

316 lines
12 KiB
Python

#!/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 sys
import cdist.emulator
import cdist.path
import cdist.core
log = logging.getLogger(__name__)
CODE_HEADER = "#!/bin/sh -e\n"
class ConfigInstall:
"""Cdist main class to hold arbitrary data"""
def __init__(self, target_host,
initial_manifest=False,
home=None,
exec_path=sys.argv[0],
debug=False):
self.target_host = target_host
os.environ['target_host'] = target_host
self.debug = debug
self.exec_path = exec_path
self.path = cdist.path.Path(self.target_host,
initial_manifest=initial_manifest,
base_dir=home,
debug=debug)
def cleanup(self):
self.path.cleanup()
def run_global_explorers(self):
"""Run global explorers"""
log.info("Running global explorers")
explorers = self.path.list_global_explorers()
if(len(explorers) == 0):
raise cdist.Error("No explorers found in " + self.path.global_explorer_dir)
self.path.transfer_global_explorers()
for explorer in explorers:
output = self.path.global_explorer_output_path(explorer)
output_fd = open(output, mode='w')
cmd = []
cmd.append("__explorer=" + cdist.path.REMOTE_GLOBAL_EXPLORER_DIR)
cmd.append(self.path.remote_global_explorer_path(explorer))
cdist.exec.run_or_fail(cmd, stdout=output_fd, remote_prefix=True)
output_fd.close()
def run_type_explorer(self, cdist_object):
"""Run type specific explorers for objects"""
type = cdist_object.type
self.path.transfer_type_explorers(type)
cmd = []
cmd.append("__explorer=" + cdist.path.REMOTE_GLOBAL_EXPLORER_DIR)
cmd.append("__type_explorer=" + self.path.remote_type_explorer_dir(type))
cmd.append("__object=" + self.path.remote_object_dir(cdist_object))
cmd.append("__object_id=" + self.path.get_object_id_from_object(cdist_object))
cmd.append("__object_fq=" + cdist_object)
# Need to transfer at least the parameters for objects to be useful
self.path.transfer_object_parameter(cdist_object)
explorers = self.path.list_type_explorers(type)
for explorer in explorers:
remote_cmd = cmd + [os.path.join(self.path.remote_type_explorer_dir(type), explorer)]
output = os.path.join(self.path.type_explorer_output_dir(cdist_object), explorer)
output_fd = open(output, mode='w')
log.debug("%s exploring %s using %s storing to %s",
cdist_object, explorer, remote_cmd, output)
cdist.exec.run_or_fail(remote_cmd, stdout=output_fd, remote_prefix=True)
output_fd.close()
def link_emulator(self):
"""Link emulator to types"""
cdist.emulator.link(self.exec_path,
self.path.bin_dir, self.path.list_types())
def run_initial_manifest(self):
"""Run the initial manifest"""
log.info("Running initial manifest %s", self.path.initial_manifest)
env = { "__manifest" : self.path.manifest_dir }
self.run_manifest(self.path.initial_manifest, extra_env=env)
def run_type_manifest(self, cdist_object):
"""Run manifest for a specific object"""
type = self.path.get_type_from_object(cdist_object)
manifest = self.path.type_dir(type, "manifest")
log.debug("%s: Running %s", cdist_object, manifest)
if os.path.exists(manifest):
env = { "__object" : self.path.object_dir(cdist_object),
"__object_id": self.path.get_object_id_from_object(cdist_object),
"__object_fq": cdist_object,
"__type": self.path.type_dir(type)
}
self.run_manifest(manifest, extra_env=env)
def run_manifest(self, manifest, extra_env=None):
"""Run a manifest"""
log.debug("Running manifest %s, env=%s", manifest, extra_env)
env = os.environ.copy()
env['PATH'] = self.path.bin_dir + ":" + env['PATH']
# Information required in every manifest
env['__target_host'] = self.target_host
env['__global'] = self.path.out_dir
# Submit debug flag to manifest, can be used by emulator and types
if self.debug:
env['__debug'] = "yes"
# Required for recording source
env['__cdist_manifest'] = manifest
# Required to find types
env['__cdist_type_base_dir'] = self.path.type_base_dir
# Other environment stuff
if extra_env:
env.update(extra_env)
cdist.exec.shell_run_or_debug_fail(manifest, [manifest], env=env)
def object_run(self, cdist_object, mode):
"""Run gencode or code for an object"""
log.debug("Running %s from %s", mode, cdist_object)
# FIXME: replace with new object interface
file=os.path.join(self.path.object_dir(cdist_object), "require")
requirements = cdist.path.file_to_list(file)
type = self.path.get_type_from_object(cdist_object)
for requirement in requirements:
log.debug("Object %s requires %s", cdist_object, requirement)
self.object_run(requirement, mode=mode)
#
# Setup env Variable:
#
env = os.environ.copy()
env['__target_host'] = self.target_host
env['__global'] = self.path.out_dir
env["__object"] = self.path.object_dir(cdist_object)
env["__object_id"] = self.path.get_object_id_from_object(cdist_object)
env["__object_fq"] = cdist_object
env["__type"] = self.path.type_dir(type)
if mode == "gencode":
paths = [
self.path.type_dir(type, "gencode-local"),
self.path.type_dir(type, "gencode-remote")
]
for bin in paths:
if os.path.isfile(bin):
# omit "gen" from gencode and use it for output base
outfile=os.path.join(self.path.object_dir(cdist_object),
os.path.basename(bin)[3:])
outfile_fd = open(outfile, "w")
# Need to flush to ensure our write is done before stdout write
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)
# Mark object as changed
open(os.path.join(self.path.object_dir(cdist_object), "changed"), "w").close()
if mode == "code":
local_dir = self.path.object_dir(cdist_object)
remote_dir = self.path.remote_object_dir(cdist_object)
bin = os.path.join(local_dir, "code-local")
if os.path.isfile(bin):
cdist.exec.run_or_fail([bin])
local_remote_code = os.path.join(local_dir, "code-remote")
remote_remote_code = os.path.join(remote_dir, "code-remote")
if os.path.isfile(local_remote_code):
self.path.transfer_file(local_remote_code, remote_remote_code)
cdist.exec.run_or_fail([remote_remote_code], remote_prefix=True)
### Cleaned / check functions: Round 1 :-) #################################
def stage_run(self):
"""The final (and real) step of deployment"""
log.info("Generating and executing code")
# Now do the final steps over the existing objects
for cdist_object in cdist.core.Object.list_objects():
log.debug("Run object: %s", cdist_object)
self.object_run(cdist_object, mode="gencode")
self.object_run(cdist_object, mode="code")
def deploy_to(self):
"""Mimic the old deploy to: Deploy to one host"""
log.info("Deploying to " + self.target_host)
self.stage_prepare()
self.stage_run()
def deploy_and_cleanup(self):
"""Do what is most often done: deploy & cleanup"""
self.deploy_to()
self.cleanup()
def init_deploy(self):
"""Ensure the base directories are cleaned up"""
log.debug("Creating clean directory structure")
self.path.remove_remote_dir(cdist.path.REMOTE_BASE_DIR)
self.path.remote_mkdir(cdist.path.REMOTE_BASE_DIR)
self.link_emulator()
def stage_prepare(self):
"""Do everything for a deploy, minus the actual code stage"""
self.init_deploy()
self.run_global_explorers()
self.run_initial_manifest()
log.info("Running object manifests and type explorers")
log.debug("Searching for objects in " + cdist.core.Object.base_dir())
# 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():
if cdist_object.prepared:
log.debug("Skipping rerun of object %s", cdist_object)
continue
else:
log.debug("Preparing object: " + cdist_object.name)
self.run_type_explorer(cdist_object)
self.run_type_manifest(cdist_object)
cdist_object.prepared = True
new_objects_created = True
# FIXME Move into configinstall
def transfer_object_parameter(self, cdist_object):
"""Transfer the object parameter to the remote destination"""
# Create base path before using mkdir -p
self.remote_mkdir(self.remote_object_parameter_dir(cdist_object))
# Synchronise parameter dir afterwards
self.transfer_dir(self.object_parameter_dir(cdist_object),
self.remote_object_parameter_dir(cdist_object))
# FIXME Move into configinstall
def transfer_global_explorers(self):
"""Transfer the global explorers"""
self.remote_mkdir(REMOTE_GLOBAL_EXPLORER_DIR)
self.transfer_dir(self.global_explorer_dir, REMOTE_GLOBAL_EXPLORER_DIR)
# FIXME Move into configinstall
def transfer_type_explorers(self, type):
"""Transfer explorers of a type, but only once"""
if type.transferred_explorers:
log.debug("Skipping retransfer for explorers of %s", type)
return
else:
# Do not retransfer
type.transferred_explorers = True
# FIXME: Can be explorer_path or explorer_dir, I don't care.
src = type.explorer_path()
dst = type.remote_explorer_path()
# Transfer if there is at least one explorer
if len(type.explorers) > 0:
# Ensure that the path exists
self.remote_mkdir(dst)
self.transfer_dir(src, dst)