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# -*- coding: utf-8 -*-
# Copyright 2015, 2016 OpenMarket Ltd
# Copyright 2019 The Matrix.org Foundation C.I.C.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import attr
from ._base import Config, ConfigError
MISSING_SENTRY = """Missing sentry-sdk library. This is required to enable sentry
integration.
"""
@attr.s
class MetricsFlags(object):
known_servers = attr.ib(default=False, validator=attr.validators.instance_of(bool))
@classmethod
def all_off(cls):
"""
Instantiate the flags with all options set to off.
"""
return cls(**{x.name: False for x in attr.fields(cls)})
class MetricsConfig(Config):
def read_config(self, config, **kwargs):
self.enable_metrics = config.get("enable_metrics", False)
self.report_stats = config.get("report_stats", None)
self.metrics_port = config.get("metrics_port")
self.metrics_bind_host = config.get("metrics_bind_host", "127.0.0.1")
if self.enable_metrics:
_metrics_config = config.get("metrics_flags") or {}
self.metrics_flags = MetricsFlags(**_metrics_config)
else:
self.metrics_flags = MetricsFlags.all_off()
self.sentry_enabled = "sentry" in config
if self.sentry_enabled:
try:
import sentry_sdk # noqa F401
except ImportError:
raise ConfigError(MISSING_SENTRY)
self.sentry_dsn = config["sentry"].get("dsn")
if not self.sentry_dsn:
raise ConfigError(
"sentry.dsn field is required when sentry integration is enabled"
)
def generate_config_section(self, report_stats=None, **kwargs):
res = """\
## Metrics ###
# Enable collection and rendering of performance metrics
#
#enable_metrics: False
# Enable sentry integration
# NOTE: While attempts are made to ensure that the logs don't contain
# any sensitive information, this cannot be guaranteed. By enabling
# this option the sentry server may therefore receive sensitive
# information, and it in turn may then diseminate sensitive information
# through insecure notification channels if so configured.
#
#sentry:
# dsn: "..."
# Flags to enable Prometheus metrics which are not suitable to be
# enabled by default, either for performance reasons or limited use.
#
metrics_flags:
# Publish synapse_federation_known_servers, a g auge of the number of
# servers this homeserver knows about, including itself. May cause
# performance problems on large homeservers.
#
#known_servers: true
# Whether or not to report anonymized homeserver usage statistics.
"""
if report_stats is None:
res += "# report_stats: true|false\n"
else:
res += "report_stats: %s\n" % ("true" if report_stats else "false")
return res
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