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elasticsearchapache-kafkalogstashlogstash-configuration

Sending Logstash Input to Multiple Outputs

I have the following Logstash configuration:

input {
    kafka {
        bootstrap_servers => "svc-kafka:9093"
        topics => ["ELK.LOG_EVENT.PROC", "ELK.API_ANALYTICS.PROC"]
        codec => "json"
        decorate_events => true
    }
}
output {
    if [kafka][topic] == "ELK.LOG_EVENT.PROC" {
        elasticsearch {
            hosts => ["svc-es:9200"]
            index => "elklogevent-%{+YYYY.MM.dd}"
            document_id => "%{id}"
        }
    } else {
        elasticsearch {
            hosts => ["svc-es:9200"]
            index => "elkapianalytics-%{+YYYY.MM.dd}"
            document_id => "%{id}"
        }
    }
}

But I am getting the following error:

[2018-10-11T13:16:30,035][ERROR][logstash.agent           ] Failed to execute action {:action=>LogStash::PipelineAction::Create/pipeline_id:main, :exception=>"LogStash::ConfigurationError", :message=>"Expected one of #, input, filter, output at line 24, column 1 (byte 514) after ", :backtrace=>["/usr/share/logstash/logstash-core/lib/logstash/compiler.rb:42:in `compile_imperative'", "/usr/share/logstash/logstash-core/lib/logstash/compiler.rb:50:in `compile_graph'", "/usr/share/logstash/logstash-core/lib/logstash/compiler.rb:12:in `block in compile_sources'", "org/jruby/RubyArray.java:2486:in `map'", "/usr/share/logstash/logstash-core/lib/logstash/compiler.rb:11:in `compile_sources'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:51:in `initialize'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:171:in `initialize'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline_action/create.rb:40:in `execute'", "/usr/share/logstash/logstash-core/lib/logstash/agent.rb:335:in `block in converge_state'", "/usr/share/logstash/logstash-core/lib/logstash/agent.rb:141:in `with_pipelines'", "/usr/share/logstash/logstash-core/lib/logstash/agent.rb:332:in `block in converge_state'", "org/jruby/RubyArray.java:1734:in `each'", "/usr/share/logstash/logstash-core/lib/logstash/agent.rb:319:in `converge_state'", "/usr/share/logstash/logstash-core/lib/logstash/agent.rb:166:in `block in converge_state_and_update'", "/usr/share/logstash/logstash-core/lib/logstash/agent.rb:141:in `with_pipelines'", "/usr/share/logstash/logstash-core/lib/logstash/agent.rb:164:in `converge_state_and_update'", "/usr/share/logstash/logstash-core/lib/logstash/agent.rb:90:in `execute'", "/usr/share/logstash/logstash-core/lib/logstash/runner.rb:343:in `block in execute'", "/usr/share/logstash/vendor/bundle/jruby/2.3.0/gems/stud-0.0.23/lib/stud/task.rb:24:in `block in initialize'"]}

Even though it clearly says it is unhappy with line 24, I don't know what is the best way to diagnose what the issue is? I am not too familiar with the Ruby language and/or Logstash in general.

This snippet is based on this SO post: logstash 5.0.1: setup elasticsearch multiple indexes ouput for multiple kafka input topics

--- EDIT: Sample Debug output after including stdout { codec => rubydebug } inside output {} block --- 

{
           "message" => "Started Application in 15.296 seconds (JVM running for 16.37)",
          "@version" => "1",
        "loggerFqcn" => "org.apache.commons.logging.LogFactory$Log4jLog",
    "threadPriority" => 5,
         "timestamp" => "2018-10-11T14:39:35.984+0000",
             "level" => "INFO",
          "threadId" => 1,
          "hostname" => "deploy-obfuscated-service-59ffb8957d-rbgs6",
        "endOfBatch" => false,
        "loggerName" => "com.abc.obfuscated.Application",
           "service" => "obfuscated-service",
            "thread" => "main",
        "timeMillis" => 1539268775984,
        "@timestamp" => 2018-10-11T14:39:35.987Z
}
Solution

  • When using decorate_events => true the [kafka][topic] field is actually added to the @metadata field, so you simply need to change your configuration to:

    if [@metadata][kafka][topic] == "ELK.LOG_EVENT.PROC" {