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cdist/bin/cdist
Nico Schottelius c147c74e1e begin to redo object_run() 
Signed-off-by: Nico Schottelius <nico@kr.ethz.ch>
2011-09-11 13:11:45 +02:00

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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 argparse
import logging
import os
import subprocess
import shutil
import sys
import tempfile
BANNER = """
.. . .x+=:. s
dF @88> z` ^% :8
'88bu. %8P . <k .88
. '*88888bu . .@8Ned8" :888ooo
.udR88N ^"*8888N .@88u .@^%8888" -*8888888
<888'888k beWE "888L ''888E` x88: `)8b. 8888
9888 'Y" 888E 888E 888E 8888N=*8888 8888
9888 888E 888E 888E %8" R88 8888
9888 888E 888F 888E @8Wou 9% .8888Lu=
?8888u../ .888N..888 888& .888888P` ^%888*
"8888P' `"888*"" R888" ` ^"F 'Y"
"P' "" ""
"""
# Given paths from installation
BASE_DIR = os.path.abspath(os.path.join(os.path.dirname(__file__), os.pardir))
CONF_DIR = os.path.join(BASE_DIR, "conf")
GLOBAL_EXPLORER_DIR = os.path.join(CONF_DIR, "explorer")
LIB_DIR = os.path.join(BASE_DIR, "lib")
MANIFEST_DIR = os.path.join(CONF_DIR, "manifest")
TYPE_DIR = os.path.join(CONF_DIR, "type")
REMOTE_BASE_DIR = "/var/lib/cdist"
REMOTE_CONF_DIR = os.path.join(REMOTE_BASE_DIR, "conf")
REMOTE_OBJECT_DIR = os.path.join(REMOTE_BASE_DIR, "object")
REMOTE_TYPE_DIR = os.path.join(REMOTE_CONF_DIR, "type")
REMOTE_GLOBAL_EXPLORER_DIR = os.path.join(REMOTE_CONF_DIR, "explorer")
DOT_CDIST = ".cdist"
VERSION = "2.0.0"
#class Context(object):
#
# def __init__(self, target_host):
# self.target_host = target_host
#
# # class variable
# user_selber_shuld_wenn_aendert = 'bla'
#
# # read only, aber statisch
# @property
# def remote_base_directory(self):
# return "/var/lib/cdist"
# @property.setter
#
# @property
# def special_foo(self):
# return 'foo/{0}'.format(self.target_host)
#
logging.basicConfig(level=logging.DEBUG, format='%(levelname)s: %(message)s')
log = logging.getLogger()
# List types
def list_types():
return os.listdir(TYPE_DIR)
def banner():
"""Guess what :-)"""
print(BANNER)
class Cdist:
"""Cdist main class to hold arbitrary data"""
def __init__(self, target_host, initial_manifest=False, remote_user="root"):
self.target_host = target_host
self.remote_prefix = ["ssh", "root@" + self.target_host]
# Setup directory paths
self.temp_dir = tempfile.mkdtemp()
self.out_dir = os.path.join(self.temp_dir, "out")
os.mkdir(self.out_dir)
self.global_explorer_out_dir = os.path.join(self.out_dir, "explorer")
os.mkdir(self.global_explorer_out_dir)
self.object_base_dir = os.path.join(self.out_dir, "object")
# Setup binary directory + contents
self.bin_dir = os.path.join(self.out_dir, "bin")
os.mkdir(self.bin_dir)
self.link_type_to_emulator()
# List of type explorers transferred
self.type_explorers_transferred = {}
self.remote_user = remote_user
# Mostly static, but can be overwritten on user demand
if initial_manifest:
self.initial_manifest = initial_manifest
else:
self.initial_manifest = os.path.join(MANIFEST_DIR, "init")
def cleanup(self):
# Do not use in __del__:
# http://docs.python.org/reference/datamodel.html#customization
# "other globals referenced by the __del__() method may already have been deleted
# or in the process of being torn down (e.g. the import machinery shutting down)"
#
print("I should cleanup " + self.temp_dir)
# shutil.rmtree(self.temp_dir)
def exit_error(self, *args):
log.error(*args)
sys.exit(1)
def remote_mkdir(self, directory):
"""Create directory on remote side"""
self.run_or_fail(["mkdir", "-p", directory], remote=True)
def remote_cat(filename):
"""Use cat on the remote side for output"""
self.run_or_fail(["cat", filename], remote=True)
def shell_run_or_debug_fail(self, script, *args, **kargs):
# Manually execute /bin/sh, because sh -e does what we want
# and sh -c -e does not exit if /bin/false called
args[0][:0] = [ "/bin/sh", "-e" ]
if "remote" in kargs:
if kargs["remote"]:
args[0][:0] = self.remote_prefix
remote = true
del kargs["remote"]
log.debug("Shell exec: " + " ".join(*args))
try:
subprocess.check_call(*args, **kargs)
except subprocess.CalledProcessError:
log.error("Code that raised the error:\n")
if remote:
remote_cat(script)
else:
script_fd = open(script)
print(script_fd.read())
script_fd.close()
self.exit_error("Non-Zero exit code exit of " + " ".join(*args))
def run_or_fail(self, *args, **kargs):
if "remote" in kargs:
if kargs["remote"]:
args[0][:0] = self.remote_prefix
del kargs["remote"]
log.debug("Exec: " + " ".join(*args))
try:
subprocess.check_call(*args, **kargs)
except subprocess.CalledProcessError:
self.exit_error("Command failed: " + " ".join(*args))
def remove_remote_dir(self, destination):
self.run_or_fail(["rm", "-rf", destination], remote=True)
def transfer_dir(self, source, destination):
"""Transfer directory and previously delete the remote destination"""
self.remove_remote_dir(destination)
self.run_or_fail(["scp", "-qr", source,
self.remote_user + "@" +
self.target_host + ":" +
destination])
def transfer_file(self, source, destination):
"""Transfer file"""
self.run_or_fail(["scp", "-q", source,
self.remote_user + "@" +
self.target_host + ":" +
destination])
def global_explorer_output_path(self, explorer):
"""Returns path of the output for a global explorer"""
return os.path.join(self.global_explorer_out_dir, explorer)
def type_explorer_output_dir(self, cdist_object):
"""Returns and creates dir of the output for a type explorer"""
dir = os.path.join(self.object_dir(cdist_object), "explorer")
if not os.path.isdir(dir):
os.mkdir(dir)
return dir
def remote_global_explorer_path(self, explorer):
"""Returns path to the remote explorer"""
return os.path.join(REMOTE_GLOBAL_EXPLORER_DIR, explorer)
def list_global_explorers(self):
"""Return list of available explorers"""
return os.listdir(GLOBAL_EXPLORER_DIR)
def list_type_explorers(self, type):
"""Return list of available explorers for a specific type"""
dir = self.type_explorer_dir(type)
if os.path.isdir(dir):
list = os.listdir(dir)
else:
list = []
return list
def list_object_paths(self, starting_point = False):
"""Return list of paths of existing objects"""
object_paths = []
if not starting_point:
starting_point = self.object_base_dir
for content in os.listdir(starting_point):
full_path = os.path.join(starting_point, content)
if os.path.isdir(full_path):
object_paths.extend(self.list_object_paths(starting_point = full_path))
# Directory contains .cdist -> is an object
if content == DOT_CDIST:
object_paths.append(starting_point)
return object_paths
def get_type_from_object(self, cdist_object):
"""Returns the first part (i.e. type) of an object"""
return cdist_object.split(os.sep)[0]
def get_object_id_from_object(self, cdist_object):
"""Returns everything but the first part (i.e. object_id) of an object"""
return os.sep.join(cdist_object.split(os.sep)[1:])
def object_dir(self, cdist_object):
"""Returns the full path to the object (including .cdist)"""
return os.path.join(self.object_base_dir, cdist_object, DOT_CDIST)
def remote_object_dir(self, cdist_object):
"""Returns the remote full path to the object (including .cdist)"""
return os.path.join(REMOTE_OBJECT_DIR, cdist_object, DOT_CDIST)
def object_parameter_dir(self, cdist_object):
"""Returns the dir to the object parameter"""
return os.path.join(self.object_dir(cdist_object), "parameter")
def remote_object_parameter_dir(self, cdist_object):
"""Returns the remote dir to the object parameter"""
return os.path.join(self.remote_object_dir(cdist_object), "parameter")
def object_code_paths(self, cdist_object):
"""Return paths to code scripts of object"""
return [os.path.join(self.object_dir(cdist_object), "code-local"),
os.path.join(self.object_dir(cdist_object), "code-remote")]
def list_objects(self, starting_point = False):
"""Return list of existing objects"""
if not starting_point:
starting_point = self.object_base_dir
object_paths = self.list_object_paths(starting_point)
objects = []
for path in object_paths:
objects.append(os.path.relpath(path, starting_point))
return objects
def type_explorer_dir(self, type):
"""Return directory that holds the explorers of a type"""
return os.path.join(TYPE_DIR, type, "explorer")
def type_gencode_paths(self, type):
"""Return paths to gencode scripts of type"""
return [os.path.join(TYPE_DIR, type, "gencode-local"),
os.path.join(TYPE_DIR, type, "gencode-remote")]
def type_manifest_path(self, type):
"""Return path to manifest of type"""
return os.path.join(TYPE_DIR, type, "manifest")
def remote_type_explorer_dir(self, type):
"""Return remote directory that holds the explorers of a type"""
return os.path.join(REMOTE_TYPE_DIR, type, "explorer")
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))
def transfer_object_code(self, cdist_object):
FIXME
"""Transfer the object code 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_file(self.object_code_path(cdist_object),
self.remote_object_parameter_dir(cdist_object))
def transfer_global_explorers(self):
"""Transfer the global explorers"""
self.transfer_dir(GLOBAL_EXPLORER_DIR, REMOTE_GLOBAL_EXPLORER_DIR)
def transfer_type_explorers(self, type):
"""Transfer explorers of a type, but only once"""
if type in self.type_explorers_transferred:
log.debug("Skipping retransfer for %s", type)
return
else:
# Do not retransfer
self.type_explorers_transferred[type] = 1
src = self.type_explorer_dir(type)
remote_base = os.path.join(REMOTE_TYPE_DIR, type)
dst = self.remote_type_explorer_dir(type)
# Only continue, if there is at least the directory
if os.path.isdir(src):
# Ensure that the path exists
self.remote_mkdir(remote_base)
self.transfer_dir(src, dst)
def link_type_to_emulator(self):
"""Link type names to cdist-type-emulator"""
for type in list_types():
source = os.path.join(LIB_DIR, "cdist-type-emulator")
destination = os.path.join(self.bin_dir, type)
log.debug("Linking %s to %s", source, destination)
os.symlink(source, destination)
def run_global_explores(self):
"""Run global explorers"""
explorers = self.list_global_explorers()
if(len(explorers) == 0):
self.exit_error("No explorers found in", GLOBAL_EXPLORER_DIR)
self.transfer_global_explorers()
for explorer in explorers:
output = self.global_explorer_output_path(explorer)
output_fd = open(output, mode='w')
cmd = []
cmd.append("__explorer=" + REMOTE_GLOBAL_EXPLORER_DIR)
cmd.append(self.remote_global_explorer_path(explorer))
self.run_or_fail(cmd, stdout=output_fd, remote=True)
output_fd.close()
def run_type_explorer(self, cdist_object):
"""Run type specific explorers for objects"""
# Based on bin/cdist-object-explorer-run
# Transfering explorers for this type
type = self.get_type_from_object(cdist_object)
self.transfer_type_explorers(type)
cmd = []
cmd.append("__explorer=" + REMOTE_GLOBAL_EXPLORER_DIR)
cmd.append("__type_explorer=" + self.remote_type_explorer_dir(type))
cmd.append("__object=" + self.remote_object_dir(cdist_object))
cmd.append("__object_id=" + self.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.transfer_object_parameter(cdist_object)
explorers = self.list_type_explorers(type)
for explorer in explorers:
remote_cmd = cmd + [os.path.join(self.remote_type_explorer_dir(type), explorer)]
output = os.path.join(self.type_explorer_output_dir(cdist_object), explorer)
output_fd = open(output, mode='w')
self.run_or_fail(remote_cmd, stdout=output_fd, remote=True)
output_fd.close()
def init_deploy(self):
log.info("Creating clean directory structure")
# Ensure there is no old stuff, neither local nor remote
# remote_run_or_fail(hostname, ["rm -rf", "${__cdist_remote_base_dir}"])
#
# # Create base directories
# remote_run_or_fail(hostname,["mkdir -p", "${__cdist_remote_base_dir}"])
#
# # Link configuraion source directory - consistent with remote
# run_or_fail(["ln -sf", "$__cdist_conf_dir", "$__cdist_local_base_dir/$__cdist_name_conf_dir"])
def run_initial_manifest(self):
"""Run the initial manifest"""
env = { "__manifest" : MANIFEST_DIR }
self.run_manifest(self.initial_manifest, extra_env=env)
def run_type_manifest(self, cdist_object):
"""Run manifest for a specific object"""
type = self.get_type_from_object(cdist_object)
manifest = self.type_manifest_path(type)
# FIXME: add more sensible checks for manifest
if os.path.exists(manifest):
env = { "__object" : self.object_dir(cdist_object),
"__object_id": self.get_object_id_from_object(cdist_object),
"__object_fq": cdist_object,
"__type": type
}
self.run_manifest(manifest, extra_env=env)
def run_manifest(self, manifest, extra_env=None):
"""Run a manifest"""
log.info("Running manifest %s, env=%s", manifest, extra_env)
env = os.environ.copy()
env['PATH'] = self.bin_dir + ":" + env['PATH']
env['__target_host'] = self.target_host
env['__global'] = self.out_dir
# Legacy stuff to make cdist-type-emulator work
env['__cdist_conf_dir'] = CONF_DIR
env['__cdist_core_dir'] = os.path.join(BASE_DIR, "core")
env['__cdist_local_base_dir'] = self.temp_dir
env['__cdist_manifest'] = self.initial_manifest
# Other environment stuff
if extra_env:
env.update(extra_env)
self.shell_run_or_debug_fail(manifest, [manifest], env=env)
def list_object_requirements(self, cdist_object):
"""Return list of requirements for specific object"""
file=os.path.join(self.object_dir(cdist_object), "require")
if os.path.isfile(file):
file_fd = open(file, "r")
requirements = file_fd.readlines()
file_fd.close()
# Remove \n from all lines
requirements = map(lambda s: s.strip(), requirements)
log.debug(requirements)
else:
requirements = []
return requirements
def object_run(self, cdist_object, mode):
"""Run gencode or code for an object"""
# FIXME: Check requirements and execute those before
requirements = self.list_object_requirements(cdist_object)
for requirement in requirements:
self.object_run(requirement, mode=mode)
# Find and run all available gencode scripts
if mode == "gencode":
paths = self.type_gencode_paths(self.get_type_from_object(cdist_object))
if mode == "code":
paths = self.object_code_paths(cdist_object)
#
# Setup env Variable:
#
env = os.environ.copy()
env['__target_host'] = self.target_host
env['__global'] = self.out_dir
env["__object"] = self.object_dir(cdist_object),
env["__object_id"] = self.get_object_id_from_object(cdist_object),
env["__object_fq"] = cdist_object
for bin in paths:
log.debug("object/bin: %s", bin)
if os.path.isfile(bin):
# FIXME: to be implemented
# cdist-object-gencode-run "$__cdist_target_host" "$__cdist_object_self"
if mode == "gencode":
# __global::__object::__object_id::__self::__target_host::
#
self.shell_run_or_debug_fail(bin, [bin], env=env)
if mode == "code":
local_dir = object_dir(cdist_object)
remote_dir = remote_object_dir(cdist_object)
# FIXME: to be implemented
# cdist-object-code-run "$__cdist_target_host" "$__cdist_object_self"
log.debug("ERROR NOT IMPLEMENTED")
sys.exit(3)
# FIXME: transfer code and add remote path!
self.run_or_fail([bin], remote=True)
def deploy_to(self):
"""Mimic the old deploy to: Deploy to one host"""
log.info("Deploying to host " + self.target_host)
self.init_deploy()
self.run_global_explores()
self.run_initial_manifest()
old_objects = []
objects = self.list_objects()
# Continue process until no new objects are created anymore
while old_objects != objects:
log.debug("Prepare stage")
old_objects = list(objects)
# FIXME: do not rerun existing objects!
for cdist_object in objects:
self.run_type_explorer(cdist_object)
self.run_type_manifest(cdist_object)
objects = self.list_objects()
# Now do the final steps over the existing objects
for cdist_object in objects:
self.object_run(cdist_object, mode="gencode")
self.object_run(cdist_object, mode="code")
if __name__ == "__main__":
parser = argparse.ArgumentParser(description='cdist ' + VERSION)
parser.add_argument('host', nargs='*', help='one or more hosts to operate on')
parser.add_argument('-b', '--banner',
help='Show cdist banner',
action='store_true', dest='banner')
parser.add_argument('-d', '--debug', help='Set log level to debug',
action='store_true')
parser.add_argument('-i', '--initial-manifest',
help='Path to a cdist manifest or - to read from stdin',
dest='manifest', required=False)
parser.add_argument('-p', '--parallel',
help='Operate on multiple hosts in parallel',
action='store_true', dest='parallel')
parser.add_argument('-s', '--sequential',
help='Operate on multiple hosts sequentially',
action='store_false', dest='parallel')
args = parser.parse_args(sys.argv[1:])
if args.debug:
logging.root.setLevel(logging.DEBUG)
if args.banner:
banner()
sys.exit(0)
try:
log.debug(args)
for host in args.host:
c = Cdist(host, initial_manifest=args.manifest)
c.deploy_to()
c.cleanup()
except KeyboardInterrupt:
sys.exit(0)
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