MQTT Preread#
Enables extracting client IDs and usernames
from CONNECT
packets for Message Queuing Telemetry Transport (MQTT)
versions
3.1.1
and
5.0.
When building from the source code,
the module must be enabled with the build parameter
Controls extracting information from For detailed description of value semantics,
see the MQTT protocol specification versions
3.1.1
and 5.0. Unique client identifier. Optional username.--with-stream_mqtt_preread_module
.
In packages and images from
our repositories,
the module is included in the build.Configuration Example#
Choosing a server in a group by client ID:#
stream {
mqtt_preread on;
upstream mqtt {
hash $mqtt_preread_clientid;
# ...
}
}
Directives#
mqtt_preread#
CONNECT
packets
during the
preread phase.
If the parameter is enabled (on
),
the variables listed below are populated
in the context where it is specified.Built-in Variables#
$mqtt_preread_clientid
#$mqtt_preread_username
#