Hi,

You need to add some filters to create a GELF message :

filter {
    mutate {
        join                    => { "tags" => ", " }
        add_field            => { "version" => "1.1" }
        remove_field    => [ "@version", "@timestamp", "type" ]
    }
}

output {
    rabbitmq {
        host    => "{{ host_ip }}"
        port    => 5672

        user    => "{{ logstash_user }}"
        password    => "{{ logstash_pass }}"

        vhost    => "{{ logstash_vhost }}"
        exchange    => "{{ logstash_exchange }}"
        exchange_type    => topic
        durable    => true

        codec => json
    }
}


Then, depending on your messages you can add some filtering rules or some Graylog extractors.

Mathieu

On 11/28/16 13:27, cazy wrote:
Hello everyone,

we are trying to set up a log transport via GELF AMQP. At some stage of the transport pipeline, there is Logstash, which should forward messages to an AMQP broker such as RabbitMQ. Eventually, Graylog should receive messages from the AMQP queues.

"GELF AMQP" can be defined as Graylog input. However, there is only an output plugin "rabbitmq" for Logstash; to my knowledge, it does not send messages in the GELF format (like the GELF output plugin).

So, is there a straightforward way to combine GELF with AMQP output? If not, are there alternatives to achieve the same, e.g. with Kafka? Because of architetural considerations, we need queueing at the log sources. And we need GELF to retain meta information of log messages.
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