311 lines
12 KiB
Python
311 lines
12 KiB
Python
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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#
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# 2010-2011 Nico Schottelius (nico-cdist at schottelius.org)
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#
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# This file is part of cdist.
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#
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# cdist is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# cdist is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with cdist. If not, see <http://www.gnu.org/licenses/>.
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#
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#
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import datetime
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import logging
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import os
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import stat
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import sys
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log = logging.getLogger(__name__)
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import cdist.emulator
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import cdist.path
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CODE_HEADER = "#!/bin/sh -e\n"
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class Config:
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"""Cdist main class to hold arbitrary data"""
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def __init__(self, target_host,
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initial_manifest=False,
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home=None,
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exec_path=sys.argv[0],
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debug=False):
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self.target_host = target_host
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self.debug = debug
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self.exec_path = exec_path
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self.path = cdist.path.Path(self.target_host,
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initial_manifest=initial_manifest,
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base_dir=home,
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debug=debug)
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self.objects_prepared = []
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def cleanup(self):
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self.path.cleanup()
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def run_global_explores(self):
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"""Run global explorers"""
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log.info("Running global explorers")
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explorers = self.path.list_global_explorers()
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if(len(explorers) == 0):
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raise CdistError("No explorers found in", self.path.global_explorer_dir)
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self.path.transfer_global_explorers()
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for explorer in explorers:
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output = self.path.global_explorer_output_path(explorer)
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output_fd = open(output, mode='w')
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cmd = []
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cmd.append("__explorer=" + cdist.path.REMOTE_GLOBAL_EXPLORER_DIR)
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cmd.append(self.path.remote_global_explorer_path(explorer))
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cdist.exec.run_or_fail(cmd, stdout=output_fd, remote_prefix=True)
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output_fd.close()
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def run_type_explorer(self, cdist_object):
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"""Run type specific explorers for objects"""
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type = self.path.get_type_from_object(cdist_object)
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self.path.transfer_type_explorers(type)
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cmd = []
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cmd.append("__explorer=" + cdist.path.REMOTE_GLOBAL_EXPLORER_DIR)
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cmd.append("__type_explorer=" + self.path.remote_type_explorer_dir(type))
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cmd.append("__object=" + self.path.remote_object_dir(cdist_object))
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cmd.append("__object_id=" + self.path.get_object_id_from_object(cdist_object))
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cmd.append("__object_fq=" + cdist_object)
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# Need to transfer at least the parameters for objects to be useful
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self.path.transfer_object_parameter(cdist_object)
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explorers = self.path.list_type_explorers(type)
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for explorer in explorers:
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remote_cmd = cmd + [os.path.join(self.path.remote_type_explorer_dir(type), explorer)]
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output = os.path.join(self.path.type_explorer_output_dir(cdist_object), explorer)
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output_fd = open(output, mode='w')
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log.debug("%s exploring %s using %s storing to %s",
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cdist_object, explorer, remote_cmd, output)
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cdist.exec.run_or_fail(remote_cmd, stdout=output_fd, remote_prefix=True)
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output_fd.close()
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def link_emulator(self):
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"""Link emulator to types"""
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cdist.emulator.link(self.exec_path,
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self.path.bin_dir, self.path.list_types())
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def init_deploy(self):
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"""Ensure the base directories are cleaned up"""
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log.debug("Creating clean directory structure")
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self.path.remove_remote_dir(cdist.path.REMOTE_BASE_DIR)
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self.path.remote_mkdir(cdist.path.REMOTE_BASE_DIR)
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self.link_emulator()
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def run_initial_manifest(self):
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"""Run the initial manifest"""
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log.info("Running initial manifest %s", self.path.initial_manifest)
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env = { "__manifest" : self.path.manifest_dir }
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self.run_manifest(self.path.initial_manifest, extra_env=env)
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def run_type_manifest(self, cdist_object):
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"""Run manifest for a specific object"""
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type = self.path.get_type_from_object(cdist_object)
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manifest = self.path.type_dir(type, "manifest")
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log.debug("%s: Running %s", cdist_object, manifest)
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if os.path.exists(manifest):
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env = { "__object" : self.path.object_dir(cdist_object),
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"__object_id": self.path.get_object_id_from_object(cdist_object),
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"__object_fq": cdist_object,
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"__type": self.path.type_dir(type)
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}
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self.run_manifest(manifest, extra_env=env)
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def run_manifest(self, manifest, extra_env=None):
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"""Run a manifest"""
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log.debug("Running manifest %s, env=%s", manifest, extra_env)
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env = os.environ.copy()
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env['PATH'] = self.path.bin_dir + ":" + env['PATH']
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# Information required in every manifest
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env['__target_host'] = self.target_host
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env['__global'] = self.path.out_dir
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# Submit debug flag to manifest, can be used by emulator and types
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if self.debug:
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env['__debug'] = "yes"
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# Required for recording source
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env['__cdist_manifest'] = manifest
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# Required to find types
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env['__cdist_type_base_dir'] = self.path.type_base_dir
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# Other environment stuff
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if extra_env:
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env.update(extra_env)
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cdist.exec.shell_run_or_debug_fail(manifest, [manifest], env=env)
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def object_run(self, cdist_object, mode):
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"""Run gencode or code for an object"""
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log.debug("Running %s from %s", mode, cdist_object)
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file=os.path.join(self.path.object_dir(cdist_object), "require")
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requirements = cdist.path.file_to_list(file)
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type = self.path.get_type_from_object(cdist_object)
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for requirement in requirements:
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log.debug("Object %s requires %s", cdist_object, requirement)
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self.object_run(requirement, mode=mode)
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#
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# Setup env Variable:
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#
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env = os.environ.copy()
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env['__target_host'] = self.target_host
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env['__global'] = self.path.out_dir
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env["__object"] = self.path.object_dir(cdist_object)
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env["__object_id"] = self.path.get_object_id_from_object(cdist_object)
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env["__object_fq"] = cdist_object
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env["__type"] = self.path.type_dir(type)
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if mode == "gencode":
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paths = [
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self.path.type_dir(type, "gencode-local"),
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self.path.type_dir(type, "gencode-remote")
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]
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for bin in paths:
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if os.path.isfile(bin):
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# omit "gen" from gencode and use it for output base
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outfile=os.path.join(self.path.object_dir(cdist_object),
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os.path.basename(bin)[3:])
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outfile_fd = open(outfile, "w")
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# Need to flush to ensure our write is done before stdout write
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outfile_fd.write(CODE_HEADER)
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outfile_fd.flush()
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cdist.exec.shell_run_or_debug_fail(bin, [bin], env=env, stdout=outfile_fd)
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outfile_fd.close()
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status = os.stat(outfile)
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# Remove output if empty, else make it executable
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if status.st_size == len(CODE_HEADER):
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os.unlink(outfile)
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else:
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# Add header and make executable - identically to 0o700
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os.chmod(outfile, stat.S_IXUSR | stat.S_IRUSR | stat.S_IWUSR)
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# Mark object as changed
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open(os.path.join(self.path.object_dir(cdist_object), "changed"), "w").close()
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if mode == "code":
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local_dir = self.path.object_dir(cdist_object)
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remote_dir = self.path.remote_object_dir(cdist_object)
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bin = os.path.join(local_dir, "code-local")
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if os.path.isfile(bin):
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cdist.exec.run_or_fail([bin])
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local_remote_code = os.path.join(local_dir, "code-remote")
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remote_remote_code = os.path.join(remote_dir, "code-remote")
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if os.path.isfile(local_remote_code):
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self.path.transfer_file(local_remote_code, remote_remote_code)
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cdist.exec.run_or_fail([remote_remote_code], remote_prefix=True)
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def stage_prepare(self):
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"""Do everything for a deploy, minus the actual code stage"""
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self.init_deploy()
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self.run_global_explores()
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self.run_initial_manifest()
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log.info("Running object manifests and type explorers")
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old_objects = []
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objects = self.path.list_objects()
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# Continue process until no new objects are created anymore
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while old_objects != objects:
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old_objects = list(objects)
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for cdist_object in objects:
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if cdist_object in self.objects_prepared:
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log.debug("Skipping rerun of object %s", cdist_object)
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continue
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else:
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self.run_type_explorer(cdist_object)
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self.run_type_manifest(cdist_object)
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self.objects_prepared.append(cdist_object)
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objects = self.path.list_objects()
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def stage_run(self):
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"""The final (and real) step of deployment"""
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log.info("Generating and executing code")
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# Now do the final steps over the existing objects
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for cdist_object in self.path.list_objects():
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log.debug("Run object: %s", cdist_object)
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self.object_run(cdist_object, mode="gencode")
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self.object_run(cdist_object, mode="code")
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def deploy_to(self):
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"""Mimic the old deploy to: Deploy to one host"""
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log.info("Deploying to " + self.target_host)
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time_start = datetime.datetime.now()
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self.stage_prepare()
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self.stage_run()
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time_end = datetime.datetime.now()
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duration = time_end - time_start
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log.info("Finished run of %s in %s seconds",
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self.target_host,
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duration.total_seconds())
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def deploy_and_cleanup(self):
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"""Do what is most often done: deploy & cleanup"""
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self.deploy_to()
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self.cleanup()
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def config(args):
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"""Configure remote system"""
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process = {}
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time_start = datetime.datetime.now()
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os.environ['__remote_exec'] = "ssh -o User=root -q"
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os.environ['__remote_copy'] = "scp -o User=root -q"
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for host in args.host:
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c = Config(host, initial_manifest=args.manifest, home=args.cdist_home, debug=args.debug)
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if args.parallel:
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log.debug("Creating child process for %s", host)
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process[host] = multiprocessing.Process(target=c.deploy_and_cleanup)
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process[host].start()
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else:
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c.deploy_and_cleanup()
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if args.parallel:
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for p in process.keys():
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log.debug("Joining process %s", p)
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process[p].join()
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time_end = datetime.datetime.now()
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log.info("Total processing time for %s host(s): %s", len(args.host),
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(time_end - time_start).total_seconds())
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