How to apply multiple grok patterns to single log file?


(pramod choudhari) #1

I want to apply two grok patterns to a single log file.
This is my logstash.confd file :-

input {
  beats {
    port => 5044
  }
}

filter {
  if [fields][log_type] == "syslog" {
    grok {
      match => { "message" => "(#!TOT:)?320:%{NUMBER:q}:%{NUMBER:q1}:%{NUMBER:q2}:%{NUMBER:q3}:%{NUMBER:q4}:%{NUMBER:q5}:%{NUMBER:st2} %{NUMBER:st3} %{NUMBER:st4} %{NUMBER:st5} %{NUMBER:st6} %{NUMBER:st7} %{NUMBER:st8} %{NUMBER:st9} %{NUMBER:st10} %{NUMBER:st11} %{NUMBER:st12} %{NUMBER:st13} %{NUMBER:st14} %{NUMBER:st15} %{NUMBER:st16} %{NUMBER:st17} %{NUMBER:st18} %{NUMBER:st19} %{NUMBER:st20} %{NUMBER:st21} %{NUMBER:st22} %{NUMBER:st23} %{NUMBER:st24} %{NUMBER:st25} %{NUMBER:st26} %{NUMBER:st27} %{NUMBER:st28} %{NUMBER:st29} :" }
    }
  }
  if ("_grokparsefailure" in [tags]) { drop {} }
  else {
    mutate {
      remove_field => ["[q]","[q1]","[q2]","[q3]","[q4]","[st1]","[st3]","[st4]","[st5]","[st6]","[st7]","[st8]","[st9]","[st10]","[st11]","[st12]","[st14]","[st15]","[st17]","[st18]","[st19]","[st20]","[st21]","[st22]","[st23]","[st24]","[st25]","[st26]","[st28]","[st29]"]
      convert => {
        "st2" => "integer"
        "st16" => "integer"
        "st13" => "integer"
        "st27" => "integer"
      }
    }
  }
}

output {
  elasticsearch {
    hosts => ["localhost:9200"]
    sniffing => true
    manage_template => false
    index => "%{[@metadata][beat]}-%{+YYYY.MM.dd}"
    document_type => "%{[@metadata][type]}"
  }
}

these are the two types of lines present in my log files:-
83:0:53:1:1:0:10:12 1532 129 784 744 118447 30 632134068 343041612 21074326 :
320:0:4:5:0:0:28:18 293 6 83 204 0 0 57 0 0 236 18 293 0 2 36 0 0 36 0 0 0 0 0 36 2 36 0 :

currently i am only filtering lines starting with 320,
what i want to do is apply another grok pattern to my log file that filters the lines that start with 83 and then mutate and convert specific fields accordingly.

I have my pattern ready for lines starting with 83
I don't know how to syntactically do it.
any idea how should i do it ??
Please Help!!!1


(Magnus B├Ąck) #2

The documentation of the grok filter's match option describes how to list multiple expressions in the same grok filter.

https://www.elastic.co/guide/en/logstash/current/plugins-filters-grok.html#plugins-filters-grok-match


(system) #3

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