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authorChristian Poessinger <christian@poessinger.com>2022-06-08 12:39:50 +0200
committerGitHub <noreply@github.com>2022-06-08 12:39:50 +0200
commitcfd958c08d2b20313dd51efc3d17695711c45dc4 (patch)
treeb31d357771b4f93eafff4dc69d7d0174c5030a01 /src/conf_mode/service_event_handler.py
parentc40b9064d97d14bee7c5f9f9674f898a1b25a6ae (diff)
parent5f9d0ad5b258258654a9a897f35a6da8d9447670 (diff)
downloadvyos-1x-cfd958c08d2b20313dd51efc3d17695711c45dc4.tar.gz
vyos-1x-cfd958c08d2b20313dd51efc3d17695711c45dc4.zip
Merge pull request #1340 from sever-sever/T3083
event-handler: T3083: Add simple event-handler
Diffstat (limited to 'src/conf_mode/service_event_handler.py')
-rwxr-xr-xsrc/conf_mode/service_event_handler.py91
1 files changed, 91 insertions, 0 deletions
diff --git a/src/conf_mode/service_event_handler.py b/src/conf_mode/service_event_handler.py
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index 000000000..5440d1056
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+++ b/src/conf_mode/service_event_handler.py
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+#!/usr/bin/env python3
+#
+# Copyright (C) 2022 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 json
+from pathlib import Path
+
+from vyos.config import Config
+from vyos.util import call, dict_search
+from vyos import ConfigError
+from vyos import airbag
+
+airbag.enable()
+
+service_name = 'vyos-event-handler'
+service_conf = Path(f'/run/{service_name}.conf')
+
+
+def get_config(config=None):
+ if config:
+ conf = config
+ else:
+ conf = Config()
+
+ base = ['service', 'event-handler', 'event']
+ config = conf.get_config_dict(base,
+ get_first_key=True,
+ no_tag_node_value_mangle=True)
+
+ return config
+
+
+def verify(config):
+ # bail out early - looks like removal from running config
+ if not config:
+ return None
+
+ for name, event_config in config.items():
+ if not dict_search('filter.pattern', event_config) or not dict_search(
+ 'script.path', event_config):
+ raise ConfigError(
+ 'Event-handler: both pattern and script path items are mandatory'
+ )
+
+ if dict_search('script.environment.message', event_config):
+ raise ConfigError(
+ 'Event-handler: "message" environment variable is reserved for log message text'
+ )
+
+
+def generate(config):
+ if not config:
+ # Remove old config and return
+ service_conf.unlink(missing_ok=True)
+ return None
+
+ # Write configuration file
+ conf_json = json.dumps(config, indent=4)
+ service_conf.write_text(conf_json)
+
+ return None
+
+
+def apply(config):
+ if config:
+ call(f'systemctl restart {service_name}.service')
+ else:
+ call(f'systemctl stop {service_name}.service')
+
+
+if __name__ == '__main__':
+ try:
+ c = get_config()
+ verify(c)
+ generate(c)
+ apply(c)
+ except ConfigError as e:
+ print(e)
+ exit(1)