| # Copyright 2015 The Chromium Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| import logging |
| import os |
| import socket |
| |
| import infra_libs |
| from infra_libs.event_mon.protos.chrome_infra_log_pb2 import ( |
| ChromeInfraEvent, ServiceEvent) |
| from infra_libs.event_mon import router as ev_router |
| |
| DEFAULT_SERVICE_ACCOUNT_CREDS = 'service-account-event-mon.json' |
| RUNTYPES = set(('dry', 'test', 'prod', 'file')) |
| |
| # Remote endpoints |
| ENDPOINTS = { |
| 'test': 'https://jmt17.google.com/log', |
| 'prod': 'https://play.googleapis.com/log', |
| } |
| |
| # Instance of router._Router (singleton) |
| _router = None |
| |
| # Cache some generally useful values / options |
| _cache = {} |
| |
| |
| def add_argparse_options(parser): |
| # The default values should make sense for local testing, not production. |
| group = parser.add_argument_group('Event monitoring (event_mon) ' |
| 'global options') |
| group.add_argument('--dry-run', default=False, |
| action='store_true', |
| help='When passed, just print what would happen, but ' |
| 'do not do it.' |
| ) |
| group.add_argument('--event-mon-run-type', default='dry', |
| choices=RUNTYPES, |
| help='Determine how to send data. "dry" does not send\n' |
| 'anything. "test" sends to the test endpoint, \n' |
| '"prod" to the actual production endpoint, and "file" \n' |
| 'writes to a file.') |
| group.add_argument('--event-mon-output-file', default='event_mon.output', |
| help='File into which LogEventLite serialized protos are\n' |
| 'written when --event-mon-run-type is "file"') |
| group.add_argument('--event-mon-service-name', |
| help='Service name to use in log events.') |
| group.add_argument('--event-mon-hostname', |
| help='Hostname to use in log events.') |
| group.add_argument('--event-mon-appengine-name', |
| help='App name to use in log events.') |
| group.add_argument('--event-mon-service-account-creds', |
| default=DEFAULT_SERVICE_ACCOUNT_CREDS, |
| metavar='JSON_FILE', |
| help="Path to a json file containing a service account's" |
| "\ncredentials. This is relative to the path specified\n" |
| "in --event-mon-service-accounts-creds-root\n" |
| "Defaults to '%(default)s'") |
| group.add_argument('--event-mon-service-accounts-creds-root', |
| metavar='DIR', |
| default=infra_libs.SERVICE_ACCOUNTS_CREDS_ROOT, |
| help="Directory containing service accounts credentials.\n" |
| "Defaults to %(default)s" |
| ) |
| |
| |
| def process_argparse_options(args): # pragma: no cover |
| """Initializes event monitoring based on provided arguments. |
| |
| Args: |
| args(argparse.Namespace): output of ArgumentParser.parse_args. |
| """ |
| setup_monitoring( |
| run_type=args.event_mon_run_type, |
| hostname=args.event_mon_hostname, |
| service_name=args.event_mon_service_name, |
| appengine_name=args.event_mon_appengine_name, |
| service_account_creds=args.event_mon_service_account_creds, |
| service_accounts_creds_root=args.event_mon_service_accounts_creds_root, |
| output_file=args.event_mon_output_file, |
| dry_run=args.dry_run |
| ) |
| |
| |
| def setup_monitoring(run_type='dry', |
| hostname=None, |
| service_name=None, |
| appengine_name=None, |
| service_account_creds=None, |
| service_accounts_creds_root=None, |
| output_file=None, |
| dry_run=False): |
| """Initializes event monitoring. |
| |
| This function is mainly used to provide default global values which are |
| required for the module to work. |
| |
| If you're implementing a command-line tool, use process_argparse_options |
| instead. |
| |
| Args: |
| run_type (str): One of 'dry', 'test', or 'prod'. Do respectively nothing, |
| hit the testing endpoint and the production endpoint. |
| |
| hostname (str): hostname as it should appear in the event. If not provided |
| a default value is computed. |
| |
| service_name (str): logical name of the service that emits events. e.g. |
| "commit_queue". |
| |
| appengine_name (str): name of the appengine app, if running on appengine. |
| |
| service_account_creds (str): path to a json file containing a service |
| account's credentials obtained from a Google Cloud project. **Path is |
| relative to service_account_creds_root**, which is not the current path by |
| default. See infra_libs.authentication for details. |
| |
| service_account_creds_root (str): path containing credentials files. |
| |
| output_file (str): file where to write the output in run_type == 'file' |
| mode. |
| |
| dry_run (bool): if True, the code has no side-effect, what would have been |
| done is printed instead. |
| """ |
| global _router |
| logging.debug('event_mon: setting up monitoring.') |
| |
| if not _router: |
| default_event = ChromeInfraEvent() |
| |
| hostname = hostname or socket.getfqdn() |
| # hostname might be empty string or None on some systems, who knows. |
| if hostname: # pragma: no branch |
| default_event.event_source.host_name = hostname |
| else: # pragma: no cover |
| logging.warning('event_mon: unable to determine hostname.') |
| |
| if service_name: |
| default_event.event_source.service_name = service_name |
| if appengine_name: |
| default_event.event_source.appengine_name = appengine_name |
| |
| _cache['default_event'] = default_event |
| if run_type in ('prod', 'test'): |
| _cache['service_account_creds'] = service_account_creds |
| _cache['service_accounts_creds_root'] = service_accounts_creds_root |
| else: |
| _cache['service_account_creds'] = None |
| _cache['service_accounts_creds_root'] = None |
| |
| if run_type not in RUNTYPES: |
| logging.error('Unknown run_type (%s). Setting to "dry"', run_type) |
| run_type = 'dry' |
| |
| if run_type == 'dry': |
| # If we are running on AppEngine or devserver, use logging module. |
| server_software = os.environ.get('SERVER_SOFTWARE', '') |
| if (server_software.startswith('Google App Engine') or |
| server_software.startswith('Development')): |
| _router = ev_router._LoggingStreamRouter() |
| else: |
| _router = ev_router._TextStreamRouter() |
| elif run_type == 'file': |
| _router = ev_router._LocalFileRouter(output_file, |
| dry_run=dry_run) |
| else: |
| _router = ev_router._HttpRouter(_cache, |
| ENDPOINTS.get(run_type), |
| dry_run=dry_run) |
| |
| |
| def get_default_event(): |
| """Returns a copy of the default event.""" |
| |
| # We return a copy here to tell people not to modify the event directly. |
| ret = ChromeInfraEvent() |
| ret.CopyFrom(_cache['default_event']) |
| return ret |
| |
| |
| def set_default_event(event): |
| """Change the default ChromeInfraEvent used to compute all events. |
| |
| Args: |
| event (ChromeInfraEvent): default event |
| """ |
| # Here we raise an exception because failing to set the default event |
| # could lead to invalid data in the database. |
| if not isinstance(event, ChromeInfraEvent): |
| msg = ('A ChromeInfraEvent is required as the default event. Got %s' % |
| type(event)) |
| logging.error(msg) |
| raise TypeError(msg) |
| |
| _cache['default_event'] = event |
| |
| |
| def close(): |
| """Reset the state. |
| |
| Call this right before exiting the program. |
| |
| Returns: |
| success (bool): False if an error occured |
| """ |
| global _router, _cache |
| _router = None |
| _cache = {} |
| return True |