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Add Zeek-level configurability of Broker slow-peer disconnects

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Dominik Charousset 2024-09-25 16:26:35 +02:00 • committed by Christian Kreibich
parent b9df1674b7
commit 4c4eb4b8e2
2 changed files with 48 additions and 0 deletions
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18
scripts/base/frameworks/broker/main.zeek
View file

@ -86,6 +86,24 @@ export {
## ZEEK_BROKER_MAX_THREADS environment variable overrides this setting. ## ZEEK_BROKER_MAX_THREADS environment variable overrides this setting.
const max_threads = 1 &redef; const max_threads = 1 &redef;
## Max number of items we buffer at most per peer. What action to take when
## the buffer reaches its maximum size is determined by
## `peer_overflow_policy`.
const peer_buffer_size = 2048 &redef;
## Configures how Broker responds to peers that cannot keep up with the
## incoming message rate. Available strategies:
## - disconnect: drop the connection to the unresponsive peer
## - drop_newest: replace the newest message in the buffer
## - drop_oldest: removed the olsted message from the buffer, then append
const peer_overflow_policy = "disconnect" &redef;
## Same as `peer_buffer_size` but for WebSocket clients.
const web_socket_buffer_size = 512 &redef;
## Same as `peer_overflow_policy` but for WebSocket clients.
const web_socket_overflow_policy = "disconnect" &redef;
## The CAF scheduling policy to use. Available options are "sharing" and ## The CAF scheduling policy to use. Available options are "sharing" and
## "stealing". The "sharing" policy uses a single, global work queue along ## "stealing". The "sharing" policy uses a single, global work queue along
## with mutex and condition variable used for accessing it, which may be ## with mutex and condition variable used for accessing it, which may be

30
src/broker/Manager.cc
View file

@ -255,6 +255,36 @@ void Manager::DoInitPostScript() {
options.disable_forwarding = ! get_option("Broker::forward_messages")->AsBool(); options.disable_forwarding = ! get_option("Broker::forward_messages")->AsBool();
options.use_real_time = use_real_time; options.use_real_time = use_real_time;
options.peer_buffer_size = get_option("Broker::peer_buffer_size")->AsCount();
auto peer_overflow_policy = get_option("Broker::peer_overflow_policy")->AsString()->CheckString();
if ( util::streq(peer_overflow_policy, "disconnect") ) {
options.peer_overflow_policy = broker::overflow_policy::disconnect;
}
else if ( util::streq(peer_overflow_policy, "drop_oldest") ) {
options.peer_overflow_policy = broker::overflow_policy::drop_oldest;
}
else if ( util::streq(peer_overflow_policy, "drop_newest") ) {
options.peer_overflow_policy = broker::overflow_policy::drop_newest;
}
else {
reporter->FatalError("Invalid Broker::peer_overflow_policy: %s", peer_overflow_policy);
}
options.web_socket_buffer_size = get_option("Broker::web_socket_buffer_size")->AsCount();
auto web_socket_overflow_policy = get_option("Broker::web_socket_overflow_policy")->AsString()->CheckString();
if ( util::streq(web_socket_overflow_policy, "disconnect") ) {
options.web_socket_overflow_policy = broker::overflow_policy::disconnect;
}
else if ( util::streq(web_socket_overflow_policy, "drop_oldest") ) {
options.web_socket_overflow_policy = broker::overflow_policy::drop_oldest;
}
else if ( util::streq(web_socket_overflow_policy, "drop_newest") ) {
options.web_socket_overflow_policy = broker::overflow_policy::drop_newest;
}
else {
reporter->FatalError("Invalid Broker::web_socket_overflow_policy: %s", web_socket_overflow_policy);
}
broker::configuration config{std::move(options)}; broker::configuration config{std::move(options)};
config.openssl_cafile(get_option("Broker::ssl_cafile")->AsString()->CheckString()); config.openssl_cafile(get_option("Broker::ssl_cafile")->AsString()->CheckString());