Logstash RabbitMQ input plugin - How to define multiple routing_key

Elastic Stack Logstash
2

The value key is a string and you cannot use the syntax like ["key1","key2"]
Try the following way:

input {
    rabbitmq {
        queue => "Elasticsearch_Queue"
        host => "rabbitmq"
        exchange => "my_event_bus"
        key => "SomeIntegrationEvent1" 
    }
    rabbitmq {
        queue => "Elasticsearch_Queue"
        host => "rabbitmq"
        exchange => "my_event_bus"
        key => "SomeIntegrationEvent2" 
    }
}