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# Authors: Karl MacMillan <kmacmillan@redhat.com>
#
# Copyright (C) 2007 Red Hat
# see file 'COPYING' for use and warranty information
#
# 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 3 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, see <http://www.gnu.org/licenses/>.
#
from ipapython import ipautil
from ipapython import services as ipaservices
import shutil
import os
ntp_conf = """# Permit time synchronization with our time source, but do not
# permit the source to query or modify the service on this system.
restrict default kod nomodify notrap nopeer noquery
restrict -6 default kod nomodify notrap nopeer noquery
# Permit all access over the loopback interface. This could
# be tightened as well, but to do so would effect some of
# the administrative functions.
restrict 127.0.0.1
restrict -6 ::1
# Hosts on local network are less restricted.
#restrict 192.168.1.0 mask 255.255.255.0 nomodify notrap
# Use public servers from the pool.ntp.org project.
# Please consider joining the pool (http://www.pool.ntp.org/join.html).
server $SERVER
#broadcast 192.168.1.255 key 42 # broadcast server
#broadcastclient # broadcast client
#broadcast 224.0.1.1 key 42 # multicast server
#multicastclient 224.0.1.1 # multicast client
#manycastserver 239.255.254.254 # manycast server
#manycastclient 239.255.254.254 key 42 # manycast client
# Undisciplined Local Clock. This is a fake driver intended for backup
# and when no outside source of synchronized time is available.
server 127.127.1.0 # local clock
#fudge 127.127.1.0 stratum 10
# Drift file. Put this in a directory which the daemon can write to.
# No symbolic links allowed, either, since the daemon updates the file
# by creating a temporary in the same directory and then rename()'ing
# it to the file.
driftfile /var/lib/ntp/drift
# Key file containing the keys and key identifiers used when operating
# with symmetric key cryptography.
keys /etc/ntp/keys
# Specify the key identifiers which are trusted.
#trustedkey 4 8 42
# Specify the key identifier to use with the ntpdc utility.
#requestkey 8
# Specify the key identifier to use with the ntpq utility.
#controlkey 8
"""
ntp_sysconfig = """# Drop root to id 'ntp:ntp' by default.
OPTIONS="-x -u ntp:ntp -p /var/run/ntpd.pid"
# Set to 'yes' to sync hw clock after successful ntpdate
SYNC_HWCLOCK=yes
# Additional options for ntpdate
NTPDATE_OPTIONS=""
"""
ntp_step_tickers = """# Use IPA-provided NTP server for initial time
$SERVER
"""
def __backup_config(path, fstore = None):
if fstore:
fstore.backup_file(path)
else:
shutil.copy(path, "%s.ipasave" % (path))
def __write_config(path, content):
fd = open(path, "w")
fd.write(content)
fd.close()
def config_ntp(server_fqdn, fstore = None, sysstore = None):
path_step_tickers = "/etc/ntp/step-tickers"
path_ntp_conf = "/etc/ntp.conf"
path_ntp_sysconfig = "/etc/sysconfig/ntpd"
sub_dict = { }
sub_dict["SERVER"] = server_fqdn
nc = ipautil.template_str(ntp_conf, sub_dict)
config_step_tickers = False
if os.path.exists(path_step_tickers):
config_step_tickers = True
ns = ipautil.template_str(ntp_step_tickers, sub_dict)
__backup_config(path_step_tickers, fstore)
__write_config(path_step_tickers, ns)
ipaservices.restore_context(path_step_tickers)
if sysstore:
module = 'ntp'
sysstore.backup_state(module, "enabled", ipaservices.knownservices.ntpd.is_enabled())
if config_step_tickers:
sysstore.backup_state(module, "step-tickers", True)
__backup_config(path_ntp_conf, fstore)
__write_config(path_ntp_conf, nc)
ipaservices.restore_context(path_ntp_conf)
__backup_config(path_ntp_sysconfig, fstore)
__write_config(path_ntp_sysconfig, ntp_sysconfig)
ipaservices.restore_context(path_ntp_sysconfig)
# Set the ntpd to start on boot
ipaservices.knownservices.ntpd.enable()
# Restart ntpd
ipaservices.knownservices.ntpd.restart()
def synconce_ntp(server_fqdn, debug=False):
"""
Syncs time with specified server using ntpdate.
Primarily designed to be used before Kerberos setup
to get time following the KDC time
Returns True if sync was successful
"""
ntpdate="/usr/sbin/ntpdate"
if os.path.exists(ntpdate):
# retry several times -- logic follows /etc/init.d/ntpdate
# implementation
cmd = [ntpdate, "-U", "ntp", "-s", "-b"]
if debug:
cmd.append('-d')
cmd.append(server_fqdn)
for retry in range(0,3):
try:
ipautil.run(cmd)
return True
except:
pass
return False
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