1 files changed, 121 insertions, 0 deletions
diff --git a/src/conf_mode/system_syslog.py b/src/conf_mode/system_syslog.py
new file mode 100644
index 0000000..eb2f02e
--- /dev/null
+++ b/src/conf_mode/system_syslog.py
@@ -0,0 +1,121 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2018-2024 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 sys import exit
+
+from vyos.base import Warning
+from vyos.config import Config
+from vyos.configdict import is_node_changed
+from vyos.configverify import verify_vrf
+from vyos.utils.process import call
+from vyos.template import render
+from vyos import ConfigError
+from vyos import airbag
+airbag.enable()
+
+rsyslog_conf = '/etc/rsyslog.d/00-vyos.conf'
+logrotate_conf = '/etc/logrotate.d/vyos-rsyslog'
+systemd_override = r'/run/systemd/system/rsyslog.service.d/override.conf'
+
+def get_config(config=None):
+    if config:
+        conf = config
+    else:
+        conf = Config()
+    base = ['system', 'syslog']
+    if not conf.exists(base):
+        return None
+
+    syslog = conf.get_config_dict(base, key_mangling=('-', '_'),
+                                  get_first_key=True, no_tag_node_value_mangle=True)
+
+    syslog.update({ 'logrotate' : logrotate_conf })
+
+    tmp = is_node_changed(conf, base + ['vrf'])
+    if tmp: syslog.update({'restart_required': {}})
+
+    syslog = conf.merge_defaults(syslog, recursive=True)
+    if syslog.from_defaults(['global']):
+        del syslog['global']
+
+    if (
+        'global' in syslog
+        and 'preserve_fqdn' in syslog['global']
+        and conf.exists(['system', 'host-name'])
+        and conf.exists(['system', 'domain-name'])
+    ):
+        hostname = conf.return_value(['system', 'host-name'])
+        domain = conf.return_value(['system', 'domain-name'])
+        fqdn = f'{hostname}.{domain}'
+        syslog['global']['local_host_name'] = fqdn
+
+    return syslog
+
+def verify(syslog):
+    if not syslog:
+        return None
+
+    if 'host' in syslog:
+         for host, host_options in syslog['host'].items():
+             if 'protocol' in host_options and host_options['protocol'] == 'udp':
+                 if 'format' in host_options and 'octet_counted' in host_options['format']:
+                     Warning(f'Syslog UDP transport for "{host}" should not use octet-counted format!')
+
+    verify_vrf(syslog)
+
+def generate(syslog):
+    if not syslog:
+        if os.path.exists(rsyslog_conf):
+            os.unlink(rsyslog_conf)
+        if os.path.exists(logrotate_conf):
+            os.unlink(logrotate_conf)
+
+        return None
+
+    render(rsyslog_conf, 'rsyslog/rsyslog.conf.j2', syslog)
+    render(systemd_override, 'rsyslog/override.conf.j2', syslog)
+    render(logrotate_conf, 'rsyslog/logrotate.j2', syslog)
+
+    # Reload systemd manager configuration
+    call('systemctl daemon-reload')
+    return None
+
+def apply(syslog):
+    systemd_socket = 'syslog.socket'
+    systemd_service = 'syslog.service'
+    if not syslog:
+        call(f'systemctl stop {systemd_service} {systemd_socket}')
+        return None
+
+    # we need to restart the service if e.g. the VRF name changed
+    systemd_action = 'reload-or-restart'
+    if 'restart_required' in syslog:
+        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)