logstash.conf

input {
  file {
    type => "ruby-logger"
    path => "/logs/development.log"
  }
}

filter{
  if [type] == "ruby-logger" {
    grok {
      pattern => "[DFEWI], \[%{TIMESTAMP_ISO8601:timestamp} #%{POSINT:pid}\] *%{RUBY_LOGLEVEL:loglevel} -- +%{DATA:progname}: %{GREEDYDATA:message}"
    }
  }
}

output {
  elasticsearch {
    hosts => "elasticsearch:9200"
  }
}