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Hook into Broker logs via its new API

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The new Broker API allows us to provide a custom logger to Broker that
pulls previously unattainable context information out of Broker to put
them into broker.log for users of Zeek.

Since Broker log events happen asynchronously, we cache them in a queue
and use a flare to notify Zeek of activity. Furthermore, the Broker
manager now implements the `ProcessFd` function to avoid unnecessary
polling of the new log queue. As a side effect, data stores are polled
less as well.
This commit is contained in:
Dominik Charousset 2024-09-29 14:59:35 +02:00 • committed by Dominik Charousset
parent b7b31ebce5
commit 30615f425e
7 changed files with 245 additions and 20 deletions
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22
scripts/base/frameworks/broker/main.zeek
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@ -176,6 +176,28 @@ export {
## will be sent.
const log_topic: function(id: Log::ID, path: string): string = default_log_topic &redef;
## The possible log event severity levels for Broker.
type LogSeverityLevel: enum {
## Fatal event, normal operation has most likely broken down.
LOG_CRITICAL,
## Unrecoverable event that imparts at least part of the system.
LOG_ERROR,
## Unespected or conspicuous event that may still be recoverable.
LOG_WARNING,
## Noteworthy event during normal operation.
LOG_INFO,
## Information that might be relevant for a user to understand system behavior.
LOG_VERBOSE,
## An event that is relevant only for troubleshooting and debugging.
LOG_DEBUG,
};
## The log event severity level for the Broker log output.
const log_severity_level = LOG_WARNING &redef;
## Event severity level for also printing the Broker log output to stderr.
const log_stderr_severity_level = LOG_CRITICAL &redef;
type ErrorCode: enum {
## The unspecified default error code.
UNSPECIFIED = 1,