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Questions tagged [logstash-grok]

Grok is an abstraction on top of regular expressions to allow easy parsing of unstructured text into structured and queryable form.

Parse arbitrary text and structure it.

Grok is a great way to parse unstructured log data into something structured and queryable.

This tool is perfect for syslog logs, apache and other webserver logs, mysql logs, and in general, any log format that is generally written for humans and not computer consumption.

Logstash ships with about 120 patterns by default. You can find them here: https://github.com/logstash-plugins/logstash-patterns-core/tree/master/patterns. You can add your own trivially. (See the patterns_dir setting)

If you need help building patterns to match your logs, you will find at:

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Grok doesn't match multiline log entries properly?

I've been going at this for weeks now and I can't seem to wrap my head around what's wrong about this. I'm trying to get all of these lines to fit into a multiline match with grok, but it only picks up the last one, and even discards the digit at…
Atombob
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Grok regex with escaped “[“, “(“, and “)” chars problems

Elastic newbie here - working with a new 5.5 install. I have a log line that looks like so: [2015/10/01@19:48:22.785-0400] P-4780 T-2208 I DBUTIL : (451) prostrct create session begin for timk519 on CON:. I have the following…
Tim Kuehn
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Logstash Grok match to last index unti begin of UserAgent

I have this log message: "sid-cmascioieiow89322&New*Sou,th%20Skvn%20and%20ir&o,n%20Age,Mozilla/5.0 (Linux; Android 6.0; CHM-U01 Build/HonorCHM-U01) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.98 Mobile Safari/537.36" And the…
khaleids
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Nginx grok pattern for logstash

Following is my Nginx log format log_format timed_combined '$http_x_forwarded_for - $remote_user [$time_local] ' '"$request" $status $body_bytes_sent ' '"$http_referer" "$http_user_agent" ' '$request_time $upstream_response_time…
Ashik Mohammed
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Filebeat/Logstash remove unwanted fields & values from output

My Filebeat configuration is very simple - - input_type: log paths: - C:\log\FilebeatInputTest.txt output.logstash: hosts: ["http://X.X.X.X:XXXX"] if I write something in ilebeatInputTest.txt like - This is from Filebeat I get output in…
CR Sardar
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logstash geoip.location mapping to geo_point not working

I can see in my default mappings geoip.location is mapped to geo_point type: GET myserver:9200/_template { "logstash": { "order": 0, "version": 50001, "template": "logstash-*", "settings": { …
red888
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Regex java exception exclude "Caused by:"

I am trying to capture the Java exception anem from a log file, but I would like to exclude the "Caused by:" string using Oniguruma Regular Expressions Version 6.0.0: ^.+Exception returns: "Caused by: java.nio.file.NoSuchFileException" How can I…
Arturski
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How to setup Logstash so that default configure file is read when it start up automatically as a service

I'm trying to setup Logstash because I want to forward Apache log info into Elasticsearch. And I want to start Logstash process automatically when the server start. I could resister Logstash as a service and start the process automatically, but it…
Naga
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Querying Kibana using grok pattern

We have configured ELK stack over our daily logs and using Kibana UI to perform basic search/query operation on the the set of logs. Some of our logs have a certain field in the message while others don't. Therefore we have not configured it as a…
Veer Shrivastav
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Logstash grok test with rspec has a different behavior?

I'm creating a test suite for grok filter. Some logs are correctly enriched by logstash but not the rspec test. To test this I launched an instance of logstash with stdin/stdout and json for input and output. Here is the sample log (nginx…
Bastien Semene
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Logstash Grok Pattern for Rails 4?

Anyone have a Logstash pattern for Ruby on Rails 4 multiline logs? I only have a pattern for Rails 3, which has a much different log structure: RUUID \h{32} # rails controller with action RCONTROLLER (?[^#]+)#(?\w+) # this will…
Carson Cole
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Not able to drop event where grok filter does not match, logstash, elastic search

I am trying to parse tomcat logs and pass output to elastic search. More or less it's working well. When I am seeing elastic search indexed data its containing lots of matched data having tags field as _grokparsefailure. This is causing lot of…
Dev Gosain
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Grok patterns for timestamp

Is there a grok pattern to extract the timestamp and date out of this string. 21:11:51:569/UTC(11/5/2015) ? I am able to use the grok patterns DATE_US and TIME separately. But not together (ie) The below patterns work. %{TIME:time} --…
Bharath
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logstash grok - how to do conditional pattern matching?

I have these three log lines in the same log file: INFO [2015-08-27 18:46:14,279] ({qtp243745864-44} NotebookServer.java[onMessage]:101) - RECEIVE << RUN_PARAGRAPH INFO [2015-08-27 18:46:14,322] ({qtp243745864-44} NotebookServer.java[broadcast]:253)…
Eran Witkon
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How to Collect couchbase logs into logstash?

Can anyone help me with how to Collect couchbase logs into central logstash server ? I tried to put all Couchbase logs in syslog and then my logstash-forwarder will forward syslog to central logstash server . So for this is tried this : I checked…
Varun Verma
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