120 lines
4.4 KiB
Python
120 lines
4.4 KiB
Python
# Copyright 2019 The Matrix.org Foundation C.I.C.d
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from typing import Any, List, Set
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from synapse.types import JsonDict
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from synapse.util.check_dependencies import DependencyException, check_requirements
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from ._base import Config, ConfigError
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class TracerConfig(Config):
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section = "tracing"
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def read_config(self, config: JsonDict, **kwargs: Any) -> None:
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opentracing_config = config.get("opentracing")
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if opentracing_config is None:
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opentracing_config = {}
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self.opentracer_enabled = opentracing_config.get("enabled", False)
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self.jaeger_config = opentracing_config.get(
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"jaeger_config",
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{"sampler": {"type": "const", "param": 1}, "logging": False},
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)
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self.force_tracing_for_users: Set[str] = set()
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if not self.opentracer_enabled:
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return
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try:
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check_requirements("opentracing")
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except DependencyException as e:
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raise ConfigError(
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e.message # noqa: B306, DependencyException.message is a property
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)
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# The tracer is enabled so sanitize the config
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self.opentracer_whitelist: List[str] = opentracing_config.get(
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"homeserver_whitelist", []
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)
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if not isinstance(self.opentracer_whitelist, list):
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raise ConfigError("Tracer homeserver_whitelist config is malformed")
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force_tracing_for_users = opentracing_config.get("force_tracing_for_users", [])
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if not isinstance(force_tracing_for_users, list):
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raise ConfigError(
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"Expected a list", ("opentracing", "force_tracing_for_users")
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)
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for i, u in enumerate(force_tracing_for_users):
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if not isinstance(u, str):
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raise ConfigError(
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"Expected a string",
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("opentracing", "force_tracing_for_users", f"index {i}"),
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)
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self.force_tracing_for_users.add(u)
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def generate_config_section(cls, **kwargs: Any) -> str:
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return """\
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## Opentracing ##
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# These settings enable opentracing, which implements distributed tracing.
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# This allows you to observe the causal chains of events across servers
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# including requests, key lookups etc., across any server running
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# synapse or any other other services which supports opentracing
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# (specifically those implemented with Jaeger).
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#
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opentracing:
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# tracing is disabled by default. Uncomment the following line to enable it.
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#
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#enabled: true
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# The list of homeservers we wish to send and receive span contexts and span baggage.
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# See https://matrix-org.github.io/synapse/latest/opentracing.html.
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#
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# This is a list of regexes which are matched against the server_name of the
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# homeserver.
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#
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# By default, it is empty, so no servers are matched.
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#
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#homeserver_whitelist:
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# - ".*"
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# A list of the matrix IDs of users whose requests will always be traced,
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# even if the tracing system would otherwise drop the traces due to
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# probabilistic sampling.
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#
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# By default, the list is empty.
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#
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#force_tracing_for_users:
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# - "@user1:server_name"
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# - "@user2:server_name"
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# Jaeger can be configured to sample traces at different rates.
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# All configuration options provided by Jaeger can be set here.
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# Jaeger's configuration is mostly related to trace sampling which
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# is documented here:
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# https://www.jaegertracing.io/docs/latest/sampling/.
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#
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#jaeger_config:
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# sampler:
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# type: const
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# param: 1
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# logging:
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# false
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"""
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