/
action_sync.py
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/
action_sync.py
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"""
Builds out filesystem trees/data based on the object tree.
This is the code behind 'cobbler sync'.
Copyright 2006-2009, Red Hat, Inc and Others
Michael DeHaan <michael.dehaan AT gmail>
This program 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 2 of the License, or
(at your option) any later version.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
"""
import os
import os.path
import glob
import shutil
import time
import yaml # Howell-Clark version
import sys
import glob
import traceback
import errno
import utils
from cexceptions import *
import templar
import pxegen
import item_distro
import item_profile
import item_repo
import item_system
from Cheetah.Template import Template
import clogger
from utils import _
import cobbler.module_loader as module_loader
class BootSync:
"""
Handles conversion of internal state to the tftpboot tree layout
"""
def __init__(self,config,verbose=True,dhcp=None,dns=None,logger=None,tftpd=None):
"""
Constructor
"""
self.logger = logger
if logger is None:
self.logger = clogger.Logger()
self.verbose = verbose
self.config = config
self.api = config.api
self.distros = config.distros()
self.profiles = config.profiles()
self.systems = config.systems()
self.settings = config.settings()
self.repos = config.repos()
self.templar = templar.Templar(config, self.logger)
self.pxegen = pxegen.PXEGen(config, self.logger)
self.dns = dns
self.dhcp = dhcp
self.tftpd = tftpd
self.bootloc = utils.tftpboot_location()
self.pxegen.verbose = verbose
self.dns.verbose = verbose
self.dhcp.verbose = verbose
self.pxelinux_dir = os.path.join(self.bootloc, "pxelinux.cfg")
self.grub_dir = os.path.join(self.bootloc, "grub")
self.images_dir = os.path.join(self.bootloc, "images")
self.yaboot_bin_dir = os.path.join(self.bootloc, "ppc")
self.yaboot_cfg_dir = os.path.join(self.bootloc, "etc")
self.s390_dir = os.path.join(self.bootloc, "s390x")
self.rendered_dir = os.path.join(self.settings.webdir, "rendered")
def run(self):
"""
Syncs the current configuration file with the config tree.
Using the Check().run_ functions previously is recommended
"""
if not os.path.exists(self.bootloc):
utils.die(self.logger,"cannot find directory: %s" % self.bootloc)
self.logger.info("running pre-sync triggers")
# run pre-triggers...
utils.run_triggers(self.api, None, "/var/lib/cobbler/triggers/sync/pre/*")
self.distros = self.config.distros()
self.profiles = self.config.profiles()
self.systems = self.config.systems()
self.settings = self.config.settings()
self.repos = self.config.repos()
# execute the core of the sync operation
self.logger.info("cleaning trees")
self.clean_trees()
# Have the tftpd module handle copying bootloaders,
# distros, images, and all_system_files
self.tftpd.sync(self.verbose)
# Copy distros to the webdir
# Adding in the exception handling to not blow up if files have
# been moved (or the path references an NFS directory that's no longer
# mounted)
for d in self.distros:
try:
self.logger.info("copying files for distro: %s" % d.name)
self.pxegen.copy_single_distro_files(d,
self.settings.webdir,True)
except CX, e:
self.logger.error(e.value)
# make the default pxe menu anyway...
self.pxegen.make_pxe_menu()
if self.settings.manage_dhcp:
self.write_dhcp()
if self.settings.manage_dns:
self.logger.info("rendering DNS files")
self.dns.regen_hosts()
self.dns.write_dns_files()
if self.settings.manage_tftpd:
# xinetd.d/tftpd, basically
self.logger.info("rendering TFTPD files")
self.tftpd.write_tftpd_files()
# copy in boot_files
self.tftpd.write_boot_files()
self.logger.info("cleaning link caches")
self.clean_link_cache()
if self.settings.manage_rsync:
self.logger.info("rendering Rsync files")
self.rsync_gen()
# run post-triggers
self.logger.info("running post-sync triggers")
utils.run_triggers(self.api, None, "/var/lib/cobbler/triggers/sync/post/*", logger=self.logger)
utils.run_triggers(self.api, None, "/var/lib/cobbler/triggers/change/*", logger=self.logger)
return True
def make_tftpboot(self):
"""
Make directories for tftpboot images
"""
if not os.path.exists(self.pxelinux_dir):
utils.mkdir(self.pxelinux_dir,logger=self.logger)
if not os.path.exists(self.grub_dir):
utils.mkdir(self.grub_dir,logger=self.logger)
grub_images_link = os.path.join(self.grub_dir, "images")
if not os.path.exists(grub_images_link):
os.symlink("../images", grub_images_link)
if not os.path.exists(self.images_dir):
utils.mkdir(self.images_dir,logger=self.logger)
if not os.path.exists(self.s390_dir):
utils.mkdir(self.s390_dir,logger=self.logger)
if not os.path.exists(self.rendered_dir):
utils.mkdir(self.rendered_dir,logger=self.logger)
if not os.path.exists(self.yaboot_bin_dir):
utils.mkdir(self.yaboot_bin_dir,logger=self.logger)
if not os.path.exists(self.yaboot_cfg_dir):
utils.mkdir(self.yaboot_cfg_dir,logger=self.logger)
def clean_trees(self):
"""
Delete any previously built pxelinux.cfg tree and virt tree info and then create
directories.
Note: for SELinux reasons, some information goes in /tftpboot, some in /var/www/cobbler
and some must be duplicated in both. This is because PXE needs tftp, and auto-kickstart
and Virt operations need http. Only the kernel and initrd images are duplicated, which is
unfortunate, though SELinux won't let me give them two contexts, so symlinks are not
a solution. *Otherwise* duplication is minimal.
"""
# clean out parts of webdir and all of /tftpboot/images and /tftpboot/pxelinux.cfg
for x in os.listdir(self.settings.webdir):
path = os.path.join(self.settings.webdir,x)
if os.path.isfile(path):
if not x.endswith(".py"):
utils.rmfile(path,logger=self.logger)
if os.path.isdir(path):
if not x in ["aux", "web", "webui", "localmirror","repo_mirror","ks_mirror","images","links","pub","repo_profile","repo_system","svc","rendered",".link_cache"] :
# delete directories that shouldn't exist
utils.rmtree(path,logger=self.logger)
if x in ["kickstarts","kickstarts_sys","images","systems","distros","profiles","repo_profile","repo_system","rendered"]:
# clean out directory contents
utils.rmtree_contents(path,logger=self.logger)
#
self.make_tftpboot()
utils.rmtree_contents(self.pxelinux_dir,logger=self.logger)
utils.rmtree_contents(self.grub_dir,logger=self.logger)
utils.rmtree_contents(self.images_dir,logger=self.logger)
utils.rmtree_contents(self.s390_dir,logger=self.logger)
utils.rmtree_contents(self.yaboot_bin_dir,logger=self.logger)
utils.rmtree_contents(self.yaboot_cfg_dir,logger=self.logger)
utils.rmtree_contents(self.rendered_dir,logger=self.logger)
def write_dhcp(self):
self.logger.info("rendering DHCP files")
self.dhcp.write_dhcp_file()
self.dhcp.regen_ethers()
def sync_dhcp(self):
restart_dhcp = str(self.settings.restart_dhcp).lower()
which_dhcp_module = module_loader.get_module_from_file("dhcp","module",just_name=True).strip()
if self.settings.manage_dhcp:
self.write_dhcp()
if which_dhcp_module == "manage_isc":
if restart_dhcp != "0":
rc = utils.subprocess_call(self.logger, "dhcpd -t -q", shell=True)
if rc != 0:
self.logger.error("dhcpd -t failed")
return False
rc = utils.subprocess_call(self.logger,"service dhcpd restart", shell=True)
if rc != 0:
self.logger.error("service dhcpd restart failed")
return False
elif which_dhcp_module == "manage_dnsmasq":
if restart_dhcp != "0":
rc = utils.subprocess_call(self.logger, "service dnsmasq restart")
if rc != 0:
self.logger.error("service dnsmasq restart failed")
return False
return True
def clean_link_cache(self):
for dirtree in [os.path.join(self.bootloc,'images'), self.settings.webdir]:
cachedir = os.path.join(dirtree,'.link_cache')
if os.path.isdir(cachedir):
cmd = "find %s -maxdepth 1 -type f -links 1 -exec rm -f '{}' ';'"%cachedir
utils.subprocess_call(self.logger,cmd)
def rsync_gen(self):
"""
Generate rsync modules of all repositories and distributions
"""
template_file = "/etc/cobbler/rsync.template"
try:
template = open(template_file,"r")
except:
raise CX(_("error reading template %s") % template_file)
template_data = ""
template_data = template.read()
template.close()
distros = []
for link in glob.glob(os.path.join(self.settings.webdir,'links','*')):
distro = {}
distro["path"] = os.path.realpath(link)
distro["name"] = os.path.basename(link)
distros.append(distro)
repos = [ repo.name for repo in self.api.repos()
if os.path.isdir(os.path.join(self.settings.webdir,"repo_mirror", repo.name))
]
metadata = {
"date" : time.asctime(time.gmtime()),
"cobbler_server" : self.settings.server,
"distros" : distros,
"repos" : repos,
"webdir" : self.settings.webdir
}
self.templar.render(template_data, metadata, "/etc/rsyncd.conf", None)