add global and type explorer

Signed-off-by: Nico Schottelius <nico@kr.ethz.ch>
This commit is contained in:
Nico Schottelius 2011-10-12 17:00:00 +02:00
parent e8f7fe3faa
commit b8cbf22086
2 changed files with 155 additions and 0 deletions

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lib/cdist/type_explorer.py Normal file
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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 io
import logging
import os
#import stat
#import shutil
#import sys
#import tempfile
#import time
#
#import cdist.exec
import cdist
log = logging.getLogger(__name__)
class Explorer:
"""Execute explorers"""
def __init__(self, context):
self.context = context
self.global_explorer_path = os.path.join(self.context.conf_path, "explorer")
self.
try:
os.mkdir(self.context.global_explorer_out_path)
except OSError as e:
raise cdist.Error("Failed to create explorer out path: %s" % e)
def run_global_explorers(self):
"""Run global explorers"""
log.info("Running global explorers")
src_path = self.context.global_explorer_path
dst_path = self.context.remote_global_explorer_path
self.exec_wrapper.transfer_path(src_path, dst_path)
outputs = {}
for explorer in os.listdir(src_path):
outputs[explorer] = io.StringIO()
cmd = []
cmd.append("__explorer=" + remote_dst_path)
cmd.append(os.path.join(remote_dst_path, explorer))
cdist.exec.run_or_fail(cmd, stdout=outputs[explorer], remote_prefix=True)
def run_type_explorer(self, cdist_object):
"""Run type specific explorers for objects"""
cdist_type = cdist_object.type
self.transfer_type_explorers(cdist_type)
cmd = []
cmd.append("__explorer=" + self.context.remote_global_explorer_path)
cmd.append("__type_explorer=" + os.path.join(
self.context.remote_type_path,
cdist_type.explorer_path))
cmd.append("__object=" + os.path.join(
self.context.remote_object_path,
cdist_object.path))
cmd.append("__object_id=" + cdist_object.object_id)
cmd.append("__object_fq=" + cdist_object.name)
# Need to transfer at least the parameters for objects to be useful
self.transfer_object_parameter(cdist_object)
outputs = {}
for explorer in cdist_type.explorers:
remote_cmd = cmd + [os.path.join(self.context.remote_type_path,
cdist_type.explorer_path, explorer)]
outputs[explorer] = io.StringIO()
log.debug("%s exploring %s using %s storing to %s",
cdist_object, explorer, remote_cmd, output)
cdist.exec.run_or_fail(remote_cmd, stdout=outputs[explorer], remote_prefix=True)
return outputs
def transfer_object_parameter(self, cdist_object):
"""Transfer the object parameter to the remote destination"""
src = os.path.join(self.object_base_path,
cdist_object.parameter_path)
dst = os.path.join(self.remote_object_path,
cdist_object.parameter_path)
# Synchronise parameter dir afterwards
self.remote_mkdir(dst)
self.transfer_path(src, dst)
def transfer_global_explorers(self):
"""Transfer the global explorers"""
self.remote_mkdir(self.remote_global_explorer_path)
self.transfer_path(self.global_explorer_path,
self.remote_global_explorer_path)
def transfer_type_explorers(self, cdist_type):
"""Transfer explorers of a type, but only once"""
if cdist_type.transferred_explorers:
log.debug("Skipping retransfer for explorers of %s", cdist_type)
return
else:
log.debug("Ensure no retransfer for %s", cdist_type)
# Do not retransfer
cdist_type.transferred_explorers = True
explorers = cdist_type.explorers
if len(explorers) > 0:
rel_path = cdist_type.explorer_path
src = os.path.join(self.type_base_path, rel_path)
dst = os.path.join(self.remote_type_path, rel_path)
# Ensure full path until type exists:
# /var/lib/cdist/conf/type/__directory/explorer
# /var/lib/cdist/conf/type/__directory may not exist,
# but remote_mkdir uses -p to fix this
self.remote_mkdir(dst)
self.transfer_path(src, dst)
def remote_mkdir(self, directory):
"""Create directory on remote side"""
cdist.exec.run_or_fail(["mkdir", "-p", directory], remote_prefix=True)
def remove_remote_path(self, destination):
"""Ensure path on remote side vanished"""
cdist.exec.run_or_fail(["rm", "-rf", destination], remote_prefix=True)
def transfer_path(self, source, destination):
"""Transfer directory and previously delete the remote destination"""
self.remove_remote_path(destination)
cdist.exec.run_or_fail(os.environ['__remote_copy'].split() +
["-r", source, self.target_host + ":" + destination])