How to create a new field by extracting data from already generated field?

Elastic Stack Logstash
1

This is how my source field looks like,

Capture

the filename is in the format YYYYMMDD.HHMM.min
so the above file was created in the year:- 2045 , month:- 02 ,date:- 18 , and time :- 09:54

what i want to do is from the above source field extract date and time and create a new field which contains only date and time,
can anybody please tell my how can i do it?
Please Help!!

2

You can use a grok filter with source as the input field and then just create a grok pattern to match.

3

that i know but,
this is my logstash.conf

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} :" }
      match => { "message" => "(#!TOT:)?83:%{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} :" }
    }
  }
  if ("_grokparsefailure" in [tags]) { drop {} }
  else {
    mutate {
      remove_field => ["[q]","[q1]","[q2]","[q3]","[q4]","[st1]","[st3]","[st5]","[st6]","[st7]","[st8]","[st9]","[st10]","[st11]","[st12]","[st14]","[st15]","[st17]","[st18]","[st19]","[st20]","[st21]","[st22]","[st23]","[st24]","[st25]","[st26]","[st28]","[st29]"]
      convert => {
        "st4" => "integer"
        "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]}"
  }
}

i already have two filters inside the filter if the logs match to any of the matches it skips the other one,where should i put the filter to extract keywords from source field in my code?can you suggest me any edit or solution?

4

Just add another grok filter:

grok{
       match => { "source" => "%{UNIXPATH}/%{YEAR}%{MONTHNUM}%{MONTHDAY}.%{HOUR}%{MINUTE}.min"
}

This should give you output that looks like this:

{
  "UNIXPATH": [
    [
      "/var/log/1min"
    ]
  ],
  "YEAR": [
    [
      "2045"
    ]
  ],
  "MONTHNUM": [
    [
      "02"
    ]
  ],
  "MONTHDAY": [
    [
      "18"
    ]
  ],
  "HOUR": [
    [
      "09"
    ]
  ],
  "MINUTE": [
    [
      "54"
    ]
  ]
}
5

thanks a lot!!!

6

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