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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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Logstash : geopip from json

I am trying to geolocate the requests on my rails application. I have configured Lograge to generate my logs in json. I think logstash is not able to retrieve the remote_ip from the json and process the geoip. Here is the decoded json with the empty…
obo
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how can i find my generated files logstash?

I'm beginner with ELK stack , so I configured logstash , and when I want to search with ElasticSearch I have no results , so I'm supposed to get a result , because I do my parse on grokdebug and it works very well . I do my research as…
k. oth
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Regular Expression(pattern) Attribute Separation

I am using the logstash filter grok and I need a pattern(regEx) for this expression: van=FpP2N410E%252FbhMY%252FBvfstlbL6YmtlPKiQ%253D&colour=7&hv=2701 I tried it with this solution, but the "colour" wasn't seperated from the…
LUIGI
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Continue with Groking On Failure

I have a grok expression slice my log4j file to make it available for kibana via elastic search. I'm starting with a simple grok expression as I'm still learning match => {"message" =>…
kallada
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grok pattern to extract errors

I want to extract the logs that have ERROR messages along with the time stamp. Below is the sample log, can someone help me with grok patterns? 26.02.2016 20:46:24.236 *ERROR* [000.000.0.000 [1456537583643] GET…
kash27
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Match multiple field names in logstash mutate filter

I would like to convert all metrics* fields into floats for logstash. For a structure like { "metric1":"1", "metric2":"2" } I'd like to do something like mutate { convert => {"metric*" => "float" } } Is that possible?
Peter Neubauer
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Parsing logstash Custom Format -- Any Suggestion

I get a response in response field of nginx different at different times .. The response is not fixed . It is in nested type many times Sometimes it will be like…
userguy
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Unable to install grok filter for logstash on Mac

Tried following commands gem install logstash-filter-grok ERROR: Could not find a valid gem 'logstash-core' (< 3.0.0, >= 2.0.0.beta2) in any repository ERROR: Possible alternatives: logstash-cli, logstasher, logstash-file,…
Praveen reddy Dandu
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Grok extracting data from matched pattern

I have this message as input: Feb 18 04:35:46 xxxx zzzz-nginx_error 2016/02/18 04:35:39 [error] 28585#0: *3120 FastCGI sent in stderr: "Primary script unknown" while reading response header from upstream, client: xx.xx.xx.xx, server: xxxxxx,…
w00t
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logstash if field exists then grok

I'm trying to create a filter for logstash that will have "general" grok filter for all logs and if some field exists, then I want it to perform a different grok. The first grok I'm using is grok { match => [ "message", "....%{NOTSPACE:name}…
DevopsQueen
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Parse a log using Losgtash

I am using Logstash to parse a log file. A sample log line is shown below. 2011/08/10 09:51:34.450457,1.048908,tcp,213.200.244.217,47908, ->,147.32.84.59,6881,S_RA,0,0,4,244,124,flow=Background-Established-cmpgw-CVUT I am using following filter in…
user1097675
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Separate output values from a single grok query?

I've been capturing web logs using logstash, and specifically I'm trying to capture web URLs, but also split them up. If I take an example log entry URL: "GET https://www.stackoverflow.com:443/some/link/here.html HTTP/1.1" I use this grok…
Kareem
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Logstash save value for next entry

Is it possible to save a value that I filtered out with grok to use it as an extra field for the following entry's ? Or Is there maybe a Plugin that can do this for me ?
Koksi
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Logstash filtering unstructured Logs

I'm pretty new to Logstash and try my best to get a grip on it. My Problem is the following: I have a Log which is structured like this: time - data - message every 10 to 15 log entrys are linked to one Job which has a ID but only the first entry of…
Koksi
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How to create index on tomcat log file using LogStash

I'd like to have some daily analysis from tomcat log file such as how many errors and exceptions raised and categories of them etc. So that I choose ELK to do that and am new to the log indexing. Here is my conf file: input { file { …
Bilguun
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