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-rwxr-xr-xsrc/conf_mode/service_ntp.py136
1 files changed, 136 insertions, 0 deletions
diff --git a/src/conf_mode/service_ntp.py b/src/conf_mode/service_ntp.py
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index 000000000..1cc23a7df
--- /dev/null
+++ b/src/conf_mode/service_ntp.py
@@ -0,0 +1,136 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2018-2023 VyOS maintainers and contributors
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 or later as
+# published by the Free Software Foundation.
+#
+# 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/>.
+
+import os
+
+from vyos.config import Config
+from vyos.configdict import is_node_changed
+from vyos.configverify import verify_vrf
+from vyos.configverify import verify_interface_exists
+from vyos.utils.process import call
+from vyos.utils.permission import chmod_750
+from vyos.utils.network import get_interface_config
+from vyos.template import render
+from vyos.template import is_ipv4
+from vyos import ConfigError
+from vyos import airbag
+airbag.enable()
+
+config_file = r'/run/chrony/chrony.conf'
+systemd_override = r'/run/systemd/system/chrony.service.d/override.conf'
+user_group = '_chrony'
+
+def get_config(config=None):
+ if config:
+ conf = config
+ else:
+ conf = Config()
+ base = ['service', 'ntp']
+ if not conf.exists(base):
+ return None
+
+ ntp = conf.get_config_dict(base, key_mangling=('-', '_'), get_first_key=True)
+ ntp['config_file'] = config_file
+ ntp['user'] = user_group
+
+ tmp = is_node_changed(conf, base + ['vrf'])
+ if tmp: ntp.update({'restart_required': {}})
+
+ return ntp
+
+def verify(ntp):
+ # bail out early - looks like removal from running config
+ if not ntp:
+ return None
+
+ if 'server' not in ntp:
+ raise ConfigError('NTP server not configured')
+
+ verify_vrf(ntp)
+
+ if 'interface' in ntp:
+ # If ntpd should listen on a given interface, ensure it exists
+ interface = ntp['interface']
+ verify_interface_exists(interface)
+
+ # If we run in a VRF, our interface must belong to this VRF, too
+ if 'vrf' in ntp:
+ tmp = get_interface_config(interface)
+ vrf_name = ntp['vrf']
+ if 'master' not in tmp or tmp['master'] != vrf_name:
+ raise ConfigError(f'NTP runs in VRF "{vrf_name}" - "{interface}" '\
+ f'does not belong to this VRF!')
+
+ if 'listen_address' in ntp:
+ ipv4_addresses = 0
+ ipv6_addresses = 0
+ for address in ntp['listen_address']:
+ if is_ipv4(address):
+ ipv4_addresses += 1
+ else:
+ ipv6_addresses += 1
+ if ipv4_addresses > 1:
+ raise ConfigError(f'NTP Only admits one ipv4 value for listen-address parameter ')
+ if ipv6_addresses > 1:
+ raise ConfigError(f'NTP Only admits one ipv6 value for listen-address parameter ')
+
+ return None
+
+def generate(ntp):
+ # bail out early - looks like removal from running config
+ if not ntp:
+ return None
+
+ render(config_file, 'chrony/chrony.conf.j2', ntp, user=user_group, group=user_group)
+ render(systemd_override, 'chrony/override.conf.j2', ntp, user=user_group, group=user_group)
+
+ # Ensure proper permission for chrony command socket
+ config_dir = os.path.dirname(config_file)
+ chmod_750(config_dir)
+
+ return None
+
+def apply(ntp):
+ systemd_service = 'chrony.service'
+ # Reload systemd manager configuration
+ call('systemctl daemon-reload')
+
+ if not ntp:
+ # NTP support is removed in the commit
+ call(f'systemctl stop {systemd_service}')
+ if os.path.exists(config_file):
+ os.unlink(config_file)
+ if os.path.isfile(systemd_override):
+ os.unlink(systemd_override)
+ return
+
+ # we need to restart the service if e.g. the VRF name changed
+ systemd_action = 'reload-or-restart'
+ if 'restart_required' in ntp:
+ systemd_action = 'restart'
+
+ call(f'systemctl {systemd_action} {systemd_service}')
+ return None
+
+if __name__ == '__main__':
+ try:
+ c = get_config()
+ verify(c)
+ generate(c)
+ apply(c)
+ except ConfigError as e:
+ print(e)
+ exit(1)