Query Separate Pipeline for Logstash SNMP Input Hosts

[bennrtc (Ben)]

Hello!
I'm using the Logstash SNMP Input to query a large number of hosts (> 5,000). The list of host ip addresses changes frequently and requires us to regularly add and remove hosts to ensure our pipeline output is up-to-date. The snmp version and community is the same for all hosts.

A separate pipeline ('ip-addresses-pipeline') produces all of these dynamic ip addresses in a field called [ip-host].

In the SNMP input section of a separate Logstash pipeline, is it possible to query [ip-host] of 'ip-addresses-pipeline' for the regularly updated list of hosts to poll? Is this all possible using an environment variable or the Elasticsearch input (or something else)?

Thank you!

[Badger]

The snmp input converts the hosts option into an array of client_definitions as part of its register function. That is called once when the pipeline is started.

You could run a logstash instance with --config.reload.automatic and re-write the configuration file that contains the snmp input configuration. logstash would then reload the pipeline when it notices the configuration has changed.