Listener¶
The Listener subsystem is a pluggable interface for inbound unstructured syslog messages. The messages can be received directly from the network devices, via UDP or TCP, or from other third parties, such as brokers, e.g. ZeroMQ, Kafka, etc., depending on the architecture of the network. The default listener is UDP.
From the command line, the Listener can be selected using the --listener
option, e.g.:
$ napalm-logs --listener tcp
From the configuration file, the Listener can be specified using the listener
option, eventually with several options. The options depend on the
nature of the Listener.
Example: listener configuration using the default configuration
listener: tcp
Example: listener configuration using custom options
listener:
tcp:
buffer_size: 2048
max_clients: 100
Note
The IP Address / port for the Listener be specified using the address and port: 514 configuration options.
Multiple listeners¶
New in version 0.4.0.
It is possible to start multiple listeners, each with its separate set of configuration options, however this feature is available only from the configuration file, e.g.:
listener:
- tcp:
address: 1.2.3.4
port: 1234
buffer_size: 2048
max_clients: 100
- udp:
address: 5.6.7.8
port: 5678
